Java.Lang.Illegalargumentexception Could Not Resolve Placeholder

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java.lang.illegalargumentexception could not resolve placeholder 주제에 대한 동영상 보기

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In this video we will see how to read application.properties File with Spring Boot using @Value annotation.
Properties file is basically having key-value pairs. You can store database properties there.
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java.lang.illegalargumentexception could not resolve placeholder 주제에 대한 자세한 내용은 여기를 참조하세요.

Could not resolve placeholder in string value – java

This Issue occurs if the application is unable to access the some_file_name.properties file.Make sure that the properties file …

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Source: stackoverflow.com

Date Published: 10/22/2022

[Solved] java.lang.IllegalArgumentException: Could not …

Today Whenever I am running spring-boot …

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Source: exerror.com

Date Published: 6/12/2021

springboot-How to resolve IllegalArgumentException Could …

Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder ‘myProp’ in value “${myProp}” at org.springframework.util.

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Date Published: 1/2/2021

java.lang.IllegalArgumentException: Could not resolve …

The spring boot application failed at startup with the exception java.lang.IllegalArgumentException: Could not resolve placeholder ‘message’ …

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Date Published: 6/17/2021

Unable to debug spring boot : Could not resolve placeholder

Anyway I’m not able to debug spring boot : due to errors related to resolving placeholders java.lang.IllegalArgumentException: Could not resolve placeholder …

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Date Published: 10/26/2022

java.lang.IllegalArgumentException Could not resolve …

In this post we will see how to fix java.lang.IllegalArgumentException Could not resolve placeholder with spring boot example.

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[Fixed] java.lang.IllegalArgumentException: Could not resolve …

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1.4.3 error Could not resolve placeholder · Issue #7977 – GitHub

it`s should be ini. Acutally behavior new it`s :java.lang.IllegalArgumentException: Could not resolve placeholder ‘flag’ in value “${flag}”.

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Spring Boot Could Not Resolve Placeholder Application Yml

lang.IllegalArgumentException: Could not resolve placeholder … Show details. Preview site. › See also: Java Spring …

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Spring boot Could not resolve placeholder application.yml

My bad i was building with Intellij anycodings_yaml Idea. Build using this command: ./mvnw clean package.

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주제와 관련된 이미지 java.lang.illegalargumentexception could not resolve placeholder

주제와 관련된 더 많은 사진을 참조하십시오 Read application.properties File In Spring Boot Using @Value Annotation. 댓글에서 더 많은 관련 이미지를 보거나 필요한 경우 더 많은 관련 기사를 볼 수 있습니다.

주제에 대한 기사 평가 java.lang.illegalargumentexception could not resolve placeholder

Author: Infybuzz
Views: 조회수 10,972회
Likes: 좋아요 159개
Date Published: 2020. 7. 25.
Video Url link: https://www.youtube.com/watch?v=cXa5rxOE6tk

Is Java Lang IllegalArgumentException could not resolve placeholder?

To Solve java. lang. IllegalArgumentException: Could not resolve placeholder Error You just need to add this lines in your pom. xml file under the <resources> section.

What is context property placeholder?

The context:property-placeholder tag is used to externalize properties in a separate file. It automatically configures PropertyPlaceholderConfigurer , which replaces the ${} placeholders, which are resolved against a specified properties file (as a Spring resource location).

What is a Propertysourcesplaceholderconfigurer used for?

PropertyPlaceholderConfigurer is used to resolve ${…} placeholders against a property. It can be local properties or system properties or environment variables. We can use PropertyPlaceholderConfigurer using XML as well as annotation. PropertyPlaceholderConfigurer externalizes the property configuration.

What is application properties in spring boot?

Properties File

Properties files are used to keep ‘N’ number of properties in a single file to run the application in a different environment. In Spring Boot, properties are kept in the application. properties file under the classpath. The application.properties file is located in the src/main/resources directory.

How do I view properties file in spring boot?

Another method to access values defined in Spring Boot is by autowiring the Environment object and calling the getProperty() method to access the value of a property file.

How do you specify file path in application properties in spring boot?

Spring Boot loads the application. properties file automatically from the project classpath. All you have to do is to create a new file under the src/main/resources directory.

How do I apply different application properties in spring boot?

Simply put application. properties file is a configuration file in which we put configuration key-value pairs for our spring boot application. Spring boot uses these configurations during startup to configure various properties like port no, context path, database configuration, and many other configurations.

How read properties file in Spring XML?

Reading properties file in Spring using XML configuration.
Reading properties file in Spring using @PropertySource Annotation.
Using @PropertySource Annotation with Spring’s Environment.
Property overriding with @PropertySource.
Using ignoreResourceNotFound attribute with @PropertySource.

What is a BeanFactoryPostProcessor and what is it used for when is it invoked?

BeanFactoryPostProcessor is an interface that contains single method postProcessBeanFactory , implementing it allows you to create logic that will modify Spring Bean Metadata before any Bean is created.

How can you externalize constants from a spring configuration file?

You can use properties files, YAML files, environment variables and command-line arguments to externalize configuration. Property values can be injected directly into your beans using the @Value annotation, accessed via Spring’s Environment abstraction or bound to structured objects.

What is @configuration in spring boot?

Spring @Configuration annotation is part of the spring core framework. Spring Configuration annotation indicates that the class has @Bean definition methods. So Spring container can process the class and generate Spring Beans to be used in the application.

How do you change application properties at runtime spring boot?

To change properties in a file during runtime, we should place that file somewhere outside the jar. Then we tell Spring where it is with the command-line parameter –spring. config. location=file://{path to file}.

What is a placeholder in XML?

placeholder (Custom XML Element Placeholder Text)

This element specifies the placeholder text which shall be displayed in place of this custom XML element when the contents of this custom XML markup are empty (i.e. there are no runs of text within the current custom XML element).

What is the purpose of @configuration annotation?

One of the most important annotations in spring is @Configuration annotation which indicates that the class has @Bean definition methods. So Spring container can process the class and generate Spring Beans to be used in the application. This annotation is part of the spring core framework.

How set dynamic value in properties file in spring boot?

Dynamic Property Management in Spring

STEP 1 : CREATE MAVEN PROJECT. …
STEP 2 : LIBRARIES. …
STEP 3 : CREATE DynamicPropertiesFile.properties.
STEP 4 : CREATE applicationContext.xml.
STEP 5 : CREATE SystemConstants CLASS. …
STEP 6 : CREATE DynamicPropertiesFileReaderTask CLASS.
STEP 7 : CREATE Application CLASS.
STEP 8 : RUN PROJECT.

Could not resolve placeholder in string value

I am trying to use properties from a .properties file, but it doesn’t seem to work.

Here is my code:

@Service(“ServiceFTP”) @Transactional public class ServiceFTPImpl implements ServiceFTP { @Value(“${project.ftp.adresse}”) private String adresse; @Value(“${project.ftp.login}”) private String compte; @Value(“${project.ftp.password}”) private String motDePasse; @Value(“${project.ftp.root}”) private String ROOT; […] }

This class uses @Value annotations to get the properties. It is also declared as a Spring Service and is linked to my infraContext.xml file :

[…]

Using context:property-placeholder , I link this file to my context-core.properties file :

project.ftp.adresse = localhost project.ftp.login = anonymous project.ftp.password = project.ftp.root = /anonymous/

This does make sense, right ?

But when I try to launch my project, Tomcat throw this exception :

ERROR [context.ContextLoader.initWebApplicationContext()] Context initialization failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘ServiceFTP’: Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private java.lang.String project.sins.service.impl.ServiceFTPImpl.adresse; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder ‘project.ftp.adresse’ in string value “${project.ftp.adresse}” at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:287) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:607) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:925) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:472) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:388) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:293) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4887) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5381) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633) at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:657) at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1636) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:722) Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private java.lang.String project.sins.service.impl.ServiceFTPImpl.adresse; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder ‘project.ftp.adresse’ in string value “${project.ftp.adresse}” at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:513) at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:92) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284) … 27 more Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder ‘project.ftp.adresse’ in string value “${project.ftp.adresse}” at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:173) at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:125) at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:151) at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:142) at org.springframework.context.support.PropertySourcesPlaceholderConfigurer$2.resolveStringValue(PropertySourcesPlaceholderConfigurer.java:169) at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:748) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:740) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:730) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:485) … 29 more

Or, in short : java.lang.IllegalArgumentException: Could not resolve placeholder ‘project.ftp.adresse’ in string value “${project.ftp.adresse}”

EDIT :

Here is my web.xml :

Project org.springframework.web.util.Log4jConfigListener log4jExposeWebAppRoot false ExpiresFilter org.apache.catalina.filters.ExpiresFilter ExpiresByType text/html now plus 0 seconds ExpiresByType application/json now plus 0 seconds ExpiresFilter /* REQUEST EncodingFilter org.springframework.web.filter.CharacterEncodingFilter encoding UTF-8 forceEncoding true EncodingFilter /* springSecurityFilterChain org.springframework.web.filter.DelegatingFilterProxy springSecurityFilterChain /* Spring OpenEntityManagerInViewFilter org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter Spring OpenEntityManagerInViewFilter /* struts2 org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter struts2 /* index.jsp org.springframework.web.context.ContextLoaderListener org.apache.struts2.tiles.StrutsTilesListener org.apache.tiles.impl.BasicTilesContainer.DEFINITIONS_CONFIG /WEB-INF/tiles/user.xml jdbc/si_nsg javax.sql.DataSource Container 60

My infraContext.xml is imported in another .xml file named applicationContext.xml :

[…]

I am obviously missing something, but I can’t figure out what.

Please let me know if you need more details, as it is my first question here, I’ll try to answer as soon as I can :).

[Solved] java.lang.IllegalArgumentException: Could not resolve placeholder

Hello Guys, How are you all? Hope You all Are Fine. Today Whenever I am running spring-boot project I am facing following error Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder ‘name’ in string value “${name}” in Java. So Here I am Explain to you all the possible solutions here.

Without wasting your time, Let’s start This Article to Solve This Error.

How This Error Occurs ?

Whenever I am running spring-boot project I am facing following error.

Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder ‘language’ in string value “${language}”

How To Solve java.lang.IllegalArgumentException: Could not resolve placeholder Error ?

How To Solve java.lang.IllegalArgumentException: Could not resolve placeholder Error? To Solve java.lang.IllegalArgumentException: Could not resolve placeholder Error You just need to add this lines in your pom.xml file under the section. Now, your error might be solved. Second solution is Just try to Rebuild Project with Build -> Rebuild Project, Now your error should be fixed. java.lang.IllegalArgumentException: Could not resolve placeholder To Solve java.lang.IllegalArgumentException: Could not resolve placeholder Error You just need to add this lines in your pom.xml file under the section. Now, your error might be solved. Second solution is Just try to Rebuild Project with Build -> Rebuild Project, Now your error should be fixed.

Solution 1: add following code in pom.xml

You just need to add this lines in your pom.xml file under the section.

src/main/resources true **/*.properties

Now, your error might be solved.

Solution 2: Rebuild Project

Just try to Rebuild Project with Build -> Rebuild Project, Now your error should be fixed.

Summary

It’s all About this issue. Hope all solution helped you a lot. Comment below Your thoughts and your queries. Also, Comment below which solution worked for you?

Also, Read

springboot-How to resolve IllegalArgumentException Could not resolve placeholder when use @Value in Spring or SpringBoot app

1. Introduction

When we read properties from files,Sometimes, you would get exception of reading the properties.

This article would demo how to resolve IllegalArgumentException:Could not resolve placeholder when using @Value in Spring app or SpringBoot apps.

2. Environments

SpringBoot 1.x and 2.x

3. The Exception

When we use @Value like this:

@Component @PropertySource ( value ={ “sysconfig.properties” }) public class SysConfig { @Value ( “${myProp}” ) private String myProp ; … }

But, most importantly, there is no myProp property in sysconfig.properties. So we got this exception:

Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder ‘myProp’ in value “$ { myProp } ” at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:174) at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:126) at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:236) at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:210) at org.springframework.context.support.PropertySourcesPlaceholderConfigurer$ 2.resolveStringValue ( PropertySourcesPlaceholderConfigurer.java:172 ) at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:846) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1087) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1067) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$ AutowiredFieldElement.inject ( AutowiredAnnotationBeanPostProcessor.java:583 ) at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:364) … 35 common frames omitted

4. How to fix it

4.1 Way 1: Add the property key to your properties file

myProp = test

4.2 Way 2: Provide a default value for the property

If you don’t want to provide the key in your file, just use @Value’s default value:

@Component @PropertySource ( value ={ “sysconfig.properties” }) public class SysConfig { @Value ( “${myProp:defaultValue}” ) private String myProp ; … }

4.3 Way 3: Provide an empty default value for the property

If you want to provide an empty default value, just do like this:

@Component @PropertySource ( value ={ “sysconfig.properties” }) public class SysConfig { @Value ( “${myProp:}” ) private String myProp ; … }

Just leave empty after the colon, then you would get an empty default value for property myProp.

5. Summary

You can see that @Value must be used carefully, if you get the above exception ,just provide the default values of the @Value.

java.lang.IllegalArgumentException: Could not resolve placeholder ‘message’ in value “${message}” – Yawin Tutor

The spring boot application failed at startup with the exception java.lang.IllegalArgumentException: Could not resolve placeholder ‘message’. This exception is due to a simple discrepancy between application.properties and the spring boot annotation with in your code.

Spring boot application validates the @Value annotation in spring boot environments at Startup. If the value is not present, then it will throw this exception

Error starting ApplicationContext. To display the conditions report re-run your application with ‘debug’ enabled. 2020-01-23 18:44:44.723 ERROR 86175 — [ restartedMain] o.s.boot.SpringApplication : Application run failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘testController’: Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder ‘message’ in value “${message}” at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:405) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1422) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878) ~[spring-context-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.4.RELEASE.jar:2.2.4.RELEASE] at com.yawintutor.SpringBootThymeleafApplication.main(SpringBootThymeleafApplication.java:10) [classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_101] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_101] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_101] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_101] at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.2.4.RELEASE.jar:2.2.4.RELEASE] Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder ‘message’ in value “${message}” at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:178) ~[spring-core-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:124) ~[spring-core-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:236) ~[spring-core-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:210) ~[spring-core-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.lambda$processProperties$0(PropertySourcesPlaceholderConfigurer.java:175) ~[spring-context-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:908) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1228) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1207) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:116) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.2.3.RELEASE.jar:5.2.3.RELEASE] … 22 common frames omitted

Root Cause

Spring boot application validates the setup and properties before starting. The @Value annotation checks the configured key in the spring boot environment. If the value is not present, this exception will be thrown. The @Value annotation checks that the key remains in the properties files.

How to reproduce this issue

Create a local variable in the spring boot java class with an @Value annotation that does not exist in the application.properties file. In Startup, the spring boot application checks for the existence of the key in the application.properties file. This exception will be thrown as this key does not exist in the application.properties file.

application.properties

welcome.message=Welcome to Yawin Tutor

package com.yawintutor; import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; @Controller public class TestController { @Value(“${message}”) private String message; @GetMapping(“/”) public String welcome(Model model) { System.out.println(“Message from application.properties : “+message); return “welcome”; } }

Solution 1

In the spring boot java class, check the name of the configured key in the @Value annotation and compare it to the application.properties file. Change the name of the key as in the application.properties. The example below shows that the @Value annotation adjusts the name of the key as per the properties file

welcome.message=Welcome to Yawin Tutor

package com.yawintutor; import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; @Controller public class TestController { @Value(“${welcome.message}”) private String message; @GetMapping(“/”) public String welcome(Model model) { System.out.println(“Message from application.properties : “+message); return “welcome”; } }

Solution 2

Check the application.properties file or system environment properties with the name of the key specified in the @Value annotation in the Java Spring Boot class. If the name of the property does not exist or varies from the required one, correct the name of the property key as per the java class. The Java key matches the property file key at startup to address this exception.

message=Welcome to Yawin Tutor

package com.yawintutor; import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; @Controller public class TestController { @Value(“${message}”) private String message; @GetMapping(“/”) public String welcome(Model model) { System.out.println(“Message from application.properties : “+message); return “welcome”; } }

Solution 3

If the key name in the @Value annotation is not needed to be specified in the application.properties, the default value for the key can be configured in the @Value annotation. The default value will be configured after the key, separated by a colon (:).

package com.yawintutor; import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; @Controller public class TestController { @Value(“${message:Welcome to Yawin Tutor}”) private String message; @GetMapping(“/”) public String welcome(Model model) { System.out.println(“Message from application.properties : “+message); return “welcome”; } }

Solution 4

If you don’t want to set any default value in the @Value annotation, you can assign the java default value to the variable by providing empty default value in the @Value annotation just postfix with colon (:)

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In this post, we will see how to fix java.lang.IllegalArgumentException Could not resolve placeholder exception in Spring Boot. It may be different reasons for Could not resolve placeholder exception. Let’s see a few reasons and fix this exception.

If we forget to define the attribute in application.properties or define the wrong attribute name and use this attribute further in our java we may get java.lang.IllegalArgumentException Could not resolve placeholder.

For example below code will throw java.lang.IllegalArgumentException Could not resolve placeholder.

@Service public class StudentServiceImpl implements StudentService { @Value(“${test.flag}”) private boolean testFlag; @Autowired private StudentRepository studentRepository; @Transactional public Student save(Student student) { Student createResponse = null; if(testFlag){ createResponse = studentRepository.save(student); } //createResponse = studentRepository.save(student); return createResponse; } }

services.properties

In the services.properties file, we are not going to define test.flag attribute.

spring.datasource.url=jdbc:mysql://localhost:3306/springbootcrudexample spring.datasource.username=root spring.datasource.password=root spring.jpa.hibernate.ddl-auto=update spring.jpa.show-sql=true spring.jpa.properties.hibernate.format_sql=true #server.port = 9091 #test.flag=true

The above code snippet will throw Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder ‘test.flag’ in value “${test.flag}” exception.

If we define a properties file with a different name (for example – appconfig.properties) then make sure we are reading it correctly.

Consider we have defined appconfig.properties as below.

@Configuration @EnableJpaRepositories(basePackages = “com.netsurfingzone.repository”) @PropertySource(value={“classpath:appconfig.properties”}) public class JpaConfig { }

or

@Configuration @EnableJpaRepositories(basePackages = “com.netsurfingzone.repository”) @PropertySource(value={“appconfig.properties”}) public class JpaConfig { }

Stacktrace for this exception.

Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder ‘test.flag’ in value “${test.flag}”

at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:178) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:124) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:239) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:210) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.lambda$processProperties$0(PropertySourcesPlaceholderConfigurer.java:175) ~[spring-context-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:912) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1245) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1224) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:130) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
… 31 common frames omitted

Let’s see the complete example that will show how to avoid java.lang.IllegalArgumentException Could not resolve placeholder exception.

Student.java

@Entity public class Student implements Serializable { @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; @Column(name = “name”) private String name; @Column(name = “roll_number”) private String rollNumber; @Column(name = “university”) private String university; //getter and setter }

StudentService.java

@Component public interface StudentService { public Student save(Student student); public Student update(Student student); public Student get(Long id); public List getStudents(String name); public void delete(Student student); }

StudentRepository.java

@Repository public interface StudentRepository extends JpaRepository { List findByName(String name); }

StudentServiceImpl.java

@Service public class StudentServiceImpl implements StudentService { @Value(“${test.flag}”) private boolean testFlag; @Autowired private StudentRepository studentRepository; @Transactional public Student save(Student student) { Student createResponse = null; if(testFlag){ createResponse = studentRepository.save(student); } //createResponse = studentRepository.save(student); return createResponse; } @Transactional public Student update(Student student) { Student updateResponse = studentRepository.save(student); return updateResponse; } @Transactional public Student get(Long id) { Optional response = studentRepository.findById(id); Student getResponse = response.get(); //String sql = “select name from student”; //List names = jdbcTemplate.queryForList(sql, String.class); //return names; return getResponse; } @Transactional public List getStudents(String name) { List response = new ArrayList<>(); // List response = studentRepository.findByName1(name); //Student getResponse = response.get(); //String sql = “select name from student”; //List names = jdbcTemplate.queryForList(sql, String.class); //return names; return response; } @Transactional public void delete(Student student) { studentRepository.delete(student); } }

StudentController.java

package com.netsurfingzone.controller; import com.netsurfingzone.entity.Student; import com.netsurfingzone.repository.StudentRepository; import com.netsurfingzone.service.StudentService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*; import org.springframework.web.servlet.ModelAndView; import java.util.List; @RestController @RequestMapping(“/student”) public class StudentController { @Autowired private StudentService studentService; @Autowired private StudentRepository studentRepository; @PostMapping(“/create”) public Student createStudent1(@RequestBody Student student) { Student createResponse = studentService.save(student); return createResponse; } @PutMapping(“/update”) public Student updateStudent(@RequestBody Student student) { Student updateResponse = studentService.update(student); return updateResponse; } /* @GetMapping(“/{id}”) public Student getStudent(@PathVariable Long id) { Student getReponse = studentService.get(id); return getReponse; }*/ @GetMapping(“/{name}”) public List getStudent(@PathVariable String name) { List getReponse = studentService.getStudents(name); return getReponse; } @DeleteMapping(“/delete”) public String deleteStudent(@RequestBody Student student) { studentService.delete(student); return “Record deleted succesfully”; } @GetMapping(“/getcustomfieldsbasisofuserinput”) public String deleteStudent(@RequestParam String fields) { System.out.println(fields); //studentService.delete(student); return “Record deleted succesfully”; } }

JpaConfig.java

@Configuration @EnableJpaRepositories(basePackages = “com.netsurfingzone.repository”) public class JpaConfig { }

SpringMain.java

@SpringBootApplication @ComponentScan(basePackages = “com.netsurfingzone.*”) @EntityScan(“com.netsurfingzone.*”) public class SpringMain { public static void main(String[] args) { SpringApplication.run(SpringMain.class, args); } }

That’s all about java.lang.IllegalArgumentException Could not resolve placeholder exception.

[Solved] java.lang.IllegalArgumentException: Could not resolve placeholder

Hello Guys, How are you all? Hope You all Are Fine. Today Whenever I am running spring-boot project I am facing following error Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder ‘name’ in string value “${name}” in Java. So Here I am Explain to you all the possible solutions here.

Without wasting your time, Let’s start This Article to Solve This Error.

How This Error Occurs ?

Whenever I am running spring-boot project I am facing following error.

Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder ‘language’ in string value “${language}”

How To Solve java.lang.IllegalArgumentException: Could not resolve placeholder Error ?

How To Solve java.lang.IllegalArgumentException: Could not resolve placeholder Error? To Solve java.lang.IllegalArgumentException: Could not resolve placeholder Error You just need to add this lines in your pom.xml file under the section. Now, your error might be solved. Second solution is Just try to Rebuild Project with Build -> Rebuild Project, Now your error should be fixed. java.lang.IllegalArgumentException: Could not resolve placeholder To Solve java.lang.IllegalArgumentException: Could not resolve placeholder Error You just need to add this lines in your pom.xml file under the section. Now, your error might be solved. Second solution is Just try to Rebuild Project with Build -> Rebuild Project, Now your error should be fixed.

Solution 1: add following code in pom.xml

You just need to add this lines in your pom.xml file under the section.

src/main/resources true **/*.properties

Now, your error might be solved.

Solution 2: Rebuild Project

Just try to Rebuild Project with Build -> Rebuild Project, Now your error should be fixed.

Summary

It’s all About this issue. Hope all solution helped you a lot. Comment below Your thoughts and your queries. Also, Comment below which solution worked for you?

Also, Read

Spring context:property-placeholder tutorial

Spring context:property-placeholder tutorial

last modified July 9, 2020

Spring context:property-placeholder tutorial shows how to use context:property-placeholder tag to externalize properties in a Spring application.

Spring is a popular Java application framework for creating enterprise applications.

Spring context:property-placeholder

The context:property-placeholder tag is used to externalize properties in a separate file. It automatically configures PropertyPlaceholderConfigurer , which replaces the ${} placeholders, which are resolved against a specified properties file (as a Spring resource location).

Spring context:property-placeholder example

The application uses context:property-placeholder to configure properties of a datasource.

pom.xml src ├───main │ ├───java │ │ └───com │ │ └───zetcode │ │ Application.java │ └───resources │ database.properties │ logback.xml │ my-beans.xml └───test └───java

This is the project structure.

pom.xml

4.0.0 com.zetcode propertyplaceholder 1.0-SNAPSHOT UTF-8 11 11 5.1.3.RELEASE ch.qos.logback logback-classic 1.2.3 org.springframework spring-context ${spring-version} org.springframework spring-core ${spring-version} org.springframework spring-jdbc ${spring-version} org.codehaus.mojo exec-maven-plugin 1.6.0 com.zetcode.Application
In the pom.xml file, we have basic Spring dependencies spring-core , spring-context , spring-jdbc and logging logback-classic dependency.

The exec-maven-plugin is used for executing Spring application from the Maven on the command line.

resources/logback.xml

%d{HH:mm:ss.SSS} %blue(%-5level) %magenta(%logger{36}) – %msg %n

The logback.xml is a configuration file for the Logback logging library.

resources/database.properties

db.url=jdbc:h2:mem:testdb db.username=testuser db.password=s$cret

These values are externalized in a database.properties file. This approach is more flexible than placing the values right into the XML file.

resources/my-beans.xml

The context:property-placeholder specifies the location of the properties file; in our case, it is database.properties file in any classpath directory.

A dataSource bean is defined. It takes its values from the properties file via the ${} syntax.

com/zetcode/Application.java

package com.zetcode; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.context.support.GenericXmlApplicationContext; import org.springframework.jdbc.datasource.SimpleDriverDataSource; public class Application { private static final Logger logger = LoggerFactory.getLogger(Application.class); public static void main(String[] args) { var ctx = new GenericXmlApplicationContext(“my-beans.xml”); var dataSource = (SimpleDriverDataSource) ctx.getBean(“dataSource”); logger.info(“Url: {}”, dataSource.getUrl()); logger.info(“User name: {}”, dataSource.getUsername()); logger.info(“Password: {}”, dataSource.getPassword()); ctx.close(); } }

This is the main application class. It retrieves the dataSource bean and prints its properties.

$ mvn -q exec:java 11:27:43.790 INFO com.zetcode.Application – Url: jdbc:h2:mem:testdb 11:27:43.790 INFO com.zetcode.Application – User name: testuser 11:27:43.790 INFO com.zetcode.Application – Password: s$cret

We run the application.

In this tutorial, we have shown how to use context:property-placeholder to externalize properties.

List all Spring tutorials.

Spring PropertyPlaceholderConfigurer Example

Spring PropertyPlaceholderConfigurer Example

${…}

PropertyPlaceholderConfigurer using XML

PropertyPlaceholderConfigurer

XML for PropertyPlaceholderConfigurer

Create Table in MySQL

CREATE TABLE `village` ( `name` VARCHAR(50) NULL DEFAULT NULL, `district` VARCHAR(50) NULL DEFAULT NULL ) COLLATE=’latin1_swedish_ci’ ENGINE=InnoDB;

Create JDBC Property File to Externalize Property Values

jdbc.driverClassName=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/concretepage jdbc.username=root jdbc.password=

Create DAO

package com.concretepage; import java.sql.Connection; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import java.util.HashMap; import java.util.Map; import javax.sql.DataSource; public class VillageDAO { private DataSource dataSource; public VillageDAO(DataSource dataSource){ this.dataSource= dataSource; } public void save() throws SQLException{ Connection con=dataSource.getConnection(); Statement st= con.createStatement(); st.executeUpdate(“insert into village values (‘dhananjaypur’,’varanasi’)”); } public Map selectFirstRow() throws SQLException { Connection con=dataSource.getConnection(); Statement st= con.createStatement(); ResultSet rs = st.executeQuery(“select name, district from village”); rs.first(); Map map = new HashMap<>(); map.put(“name”, rs.getString(1)); map.put(“district”, rs.getString(2)); System.out.println(map); return map; } }

Run Demo

package com.concretepage; import java.sql.SQLException; import org.springframework.context.support.AbstractApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class SpringDemo { public static void main(String[] args) throws SQLException { AbstractApplicationContext context = new ClassPathXmlApplicationContext(“app-conf.xml”); VillageDAO vill=(VillageDAO)context.getBean(“villageDAO”); vill.save(); vill.selectFirstRow(); context.registerShutdownHook(); } }

{district=varanasi, name=dhananjaypur}

Gradle File

apply plugin: ‘java’ apply plugin: ‘eclipse’ archivesBaseName = ‘SpringDemo’ version = ‘1’ repositories { mavenCentral() } dependencies { compile ‘org.springframework.boot:spring-boot-starter:1.2.7.RELEASE’ compile ‘commons-dbcp:commons-dbcp:1.4’ compile ‘mysql:mysql-connector-java:5.1.31’ }

PropertyPlaceholderConfigurer using Annotation

PropertyPlaceholderConfigurer

PropertyPlaceholderConfigurer

@PropertySource

@Value

Java Configuration: Create Static Bean for PropertyPlaceholderConfigurer

PropertyPlaceholderConfigurer

@Bean

PropertyPlaceholderConfigurer

@Value

package com.concretepage; import javax.sql.DataSource; import org.apache.commons.dbcp.BasicDataSource; import org.springframework.beans.factory.annotation.Value; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.PropertySource; import org.springframework.context.support.PropertySourcesPlaceholderConfigurer; @Configuration @PropertySource(“classpath:jdbc.properties”) public class AppConfig { @Value(“${jdbc.driverClassName}”) private String driverClassName; @Value(“${jdbc.url}”) private String jdbcURL; @Value(“${jdbc.username}”) private String username; @Value(“${jdbc.password}”) private String password; @Bean public DataSource getDataSource() { BasicDataSource dataSource = new BasicDataSource(); dataSource.setDriverClassName(driverClassName); dataSource.setUrl(jdbcURL); dataSource.setUsername(username); dataSource.setPassword(password); return dataSource; } @Bean public VillageDAO villageDAO(DataSource dataSource) { return new VillageDAO(dataSource); } @Bean public static PropertySourcesPlaceholderConfigurer placeHolderConfigurer() { return new PropertySourcesPlaceholderConfigurer(); } }

Run Demo

package com.concretepage; import java.sql.SQLException; import org.springframework.context.annotation.AnnotationConfigApplicationContext; public class SpringDemo { public static void main(String[] args) throws SQLException { AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(); ctx.register(AppConfig.class); ctx.refresh(); VillageDAO villageDAO = ctx.getBean(VillageDAO.class); villageDAO.save(); villageDAO.selectFirstRow(); ctx.registerShutdownHook(); } }

{district=varanasi, name=dhananjaypur}

Download Source Code

On this page we will provide spring PropertyPlaceholderConfigurer example using annotation and XML to externalize property values. In case of XML, simply create bean for PropertyPlaceholderConfigurer and set the location of property file to externalize. In case of annotation, we need to create static bean of PropertyPlaceholderConfigurer in java configuration.PropertyPlaceholderConfigurer is used to resolveplaceholders against a property. It can be local properties or system properties or environment variables. We can use PropertyPlaceholderConfigurer using XML as well as annotation.PropertyPlaceholderConfigurer externalizes the property configuration. Setting hard coded property values in our code is not good coding style. Properties should be configured in a property file inside or outside application. So that changing properties frequently will not cause to change the code. Here on this page we will provide complete example for PropertyPlaceholderConfigurer using XML as well annotation.For thedemo in XML , we are using an application which will interact with database. We will externalize our JDBC connection properties in a property file.Find the application context XML file.Create a table in MySQL in which we will insert the data and then select it.Create a JDBC property file where we will configure our JDBC connection properties.Find a DAO class used in our demo.Run the demo.Find the output.Find the gradle file to resolve the JAR dependencies.To useusing annotation, we will create a static bean of it in java configuration class. To externalize the properties we will usewithand: It loads property file.: It is used for expression-driven dependency injection.We will create a static bean ofin java configuration. The reason to createmethod asis that it must be instantiated very early in the spring container life-cycle. And hencebean will interfere with processing ofannotation.Run the demo.Find the output.

Spring Boot – Application Properties

Spring Boot – Application Properties

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Application Properties support us to work in different environments. In this chapter, you are going to learn how to configure and specify the properties to a Spring Boot application.

Command Line Properties

Spring Boot application converts the command line properties into Spring Boot Environment properties. Command line properties take precedence over the other property sources. By default, Spring Boot uses the 8080 port number to start the Tomcat. Let us learn how change the port number by using command line properties.

Step 1 − After creating an executable JAR file, run it by using the command java –jar .

Step 2 − Use the command given in the screenshot given below to change the port number for Spring Boot application by using command line properties.

Note − You can provide more than one application properties by using the delimiter −.

Properties File

Properties files are used to keep ‘N’ number of properties in a single file to run the application in a different environment. In Spring Boot, properties are kept in the application.properties file under the classpath.

The application.properties file is located in the src/main/resources directory. The code for sample application.properties file is given below −

server.port = 9090 spring.application.name = demoservice

Note that in the code shown above the Spring Boot application demoservice starts on the port 9090.

YAML File

Spring Boot supports YAML based properties configurations to run the application. Instead of application.properties, we can use application.yml file. This YAML file also should be kept inside the classpath. The sample application.yml file is given below −

spring: application: name: demoservice server: port: 9090

Externalized Properties

Instead of keeping the properties file under classpath, we can keep the properties in different location or path. While running the JAR file, we can specify the properties file path. You can use the following command to specify the location of properties file while running the JAR −

-Dspring.config.location = C:\application.properties

Use of @Value Annotation

The @Value annotation is used to read the environment or application property value in Java code. The syntax to read the property value is shown below −

@Value(“${property_key_name}”)

Look at the following example that shows the syntax to read the spring.application.name property value in Java variable by using @Value annotation.

@Value(“${spring.application.name}”)

Observe the code given below for a better understanding −

import org.springframework.beans.factory.annotation.Value; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @SpringBootApplication @RestController public class DemoApplication { @Value(“${spring.application.name}”) private String name; public static void main(String[] args) { SpringApplication.run(DemoApplication.class, args); } @RequestMapping(value = “/”) public String name() { return name; } }

Note − If the property is not found while running the application, Spring Boot throws the Illegal Argument exception as Could not resolve placeholder ‘spring.application.name’ in value “${spring.application.name}”.

To resolve the placeholder issue, we can set the default value for the property using thr syntax given below −

@Value(“${property_key_name:default_value}”) @Value(“${spring.application.name:demoservice}”)

Spring Boot Active Profile

Spring Boot supports different properties based on the Spring active profile. For example, we can keep two separate files for development and production to run the Spring Boot application.

Spring active profile in application.properties

Let us understand how to have Spring active profile in application.properties. By default, application. properties will be used to run the Spring Boot application. If you want to use profile based properties, we can keep separate properties file for each profile as shown below −

application.properties

server.port = 8080 spring.application.name = demoservice

application-dev.properties

server.port = 9090 spring.application.name = demoservice

application-prod.properties

server.port = 4431 spring.application.name = demoservice

While running the JAR file, we need to specify the spring active profile based on each properties file. By default, Spring Boot application uses the application.properties file. The command to set the spring active profile is shown below −

You can see active profile name on the console log as shown below −

2017-11-26 08:13:16.322 INFO 14028 — [ main] com.tutorialspoint.demo.DemoApplication : The following profiles are active: dev

Now, Tomcat has started on the port 9090 (http) as shown below −

2017-11-26 08:13:20.185 INFO 14028 — [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 9090 (http)

You can set the Production active profile as shown below −

You can see active profile name on the console log as shown below −

2017-11-26 08:13:16.322 INFO 14028 — [ main] com.tutorialspoint.demo.DemoApplication : The following profiles are active: prod

Now, Tomcat started on the port 4431 (http) as shown below −

2017-11-26 08:13:20.185 INFO 14028 — [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 4431 (http)

Spring active profile for application.yml

Let us understand how to keep Spring active profile for application.yml. We can keep the Spring active profile properties in the single application.yml file. No need to use the separate file like application.properties.

The following is an example code to keep the Spring active profiles in application.yml file. Note that the delimiter (—) is used to separate each profile in application.yml file.

spring: application: name: demoservice server: port: 8080 — spring: profiles: dev application: name: demoservice server: port: 9090 — spring: profiles: prod application: name: demoservice server: port: 4431

To command to set development active profile is given below −

You can see active profile name on the console log as shown below −

2017-11-26 08:41:37.202 INFO 14104 — [ main] com.tutorialspoint.demo.DemoApplication : The following profiles are active: dev

Now, Tomcat started on the port 9090 (http) as shown below −

2017-11-26 08:41:46.650 INFO 14104 — [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 9090 (http)

The command to set Production active profile is given below −

You can see active profile name on the console log as shown below −

2017-11-26 08:43:10.743 INFO 13400 — [ main] com.tutorialspoint.demo.DemoApplication : The following profiles are active: prod

This will start Tomcat on the port 4431 (http) as shown below:

2017-11-26 08:43:14.473 INFO 13400 — [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 4431 (http)

[Fixed] java.lang.IllegalArgumentException: Could not resolve placeholder

Today We are Going To Solve java.lang.IllegalArgumentException: Could not resolve placeholder in java. Here we will Discuss All Possible Solutions and How this error Occurs So let’s get started with this Article.

How to Fix java.lang.IllegalArgumentException: Could not resolve placeholder Error?

How to Fix java.lang.IllegalArgumentException: Could not resolve placeholder Error? To Fix java.lang.IllegalArgumentException: Could not resolve placeholder Error just Change the annotation. First of all, pass the parameter as: file:appclient.properties or classpath:appclient.properties .

And after it change the annotation to: @PropertySource(value={“classpath:appclient.properties”}) It will help you. java.lang.IllegalArgumentException: Could not resolve placeholder To Fix java.lang.IllegalArgumentException: Could not resolve placeholder Error just Add the configuration file path as a system property. To solve this error just add the configuration file path as a system property: java -Dapp.config.path=path_to_config_file -jar your.jar

Solution 1 : Change the annotation

First of all, pass the parameter as: file:appclient.properties or classpath:appclient.properties .

And after it change the annotation to:

@PropertySource(value={“classpath:appclient.properties”})

It will help you.

Solution 2 : Add the configuration file path as a system property

To solve this error just add the configuration file path as a system property:

java -Dapp.config.path=path_to_config_file -jar your.jar

Conclusion

So these were all possible solutions to this error. I hope your error has been solved by this article. In the comments, tell us which solution worked? If you liked our article, please share it on your social media and comment on your suggestions. Thank you.

키워드에 대한 정보 java.lang.illegalargumentexception could not resolve placeholder

다음은 Bing에서 java.lang.illegalargumentexception could not resolve placeholder 주제에 대한 검색 결과입니다. 필요한 경우 더 읽을 수 있습니다.

이 기사는 인터넷의 다양한 출처에서 편집되었습니다. 이 기사가 유용했기를 바랍니다. 이 기사가 유용하다고 생각되면 공유하십시오. 매우 감사합니다!

사람들이 주제에 대해 자주 검색하는 키워드 Read application.properties File In Spring Boot Using @Value Annotation

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Read application.properties File In Spring Boot Using @Value Annotation
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read properties file in spring boot using @value annotation

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