I have been trying to create a demo spring boot app with MessageSource, but i couldn't figure out what is the problem. I tried in couple of ways:
- MessageSourceAutoConfiguration
- Creating my own bean within a @configuration file and autowiring it
Below is the MessageSourceAutoConfiguration way:
I am using spring-boot-starter-parent 1.5.7.RELEASE.
My folder structure:
DemoApplication.java
@SpringBootApplication
public class DemoApplication
{
public static void main(String[] args)
{
SpringApplication.run(DemoApplication.class, args);
}
}
DemoController.java
@RestController
public class DemoController implements MessageSourceAware
{
private MessageSource messageSource;
@Override
public void setMessageSource(MessageSource messageSource)
{
this.messageSource = messageSource;
}
@RequestMapping("demo")
public String getLocalisedText()
{
return messageSource.getMessage("test", new Object[0], new Locale("el"));
}
}
Application.yml
spring:
messages:
basename: messages
messages.properties
test=This is a demo app!
messages_el.properties
test=This is a greek demo app!
pom.xml
<groupId>com.example.i18n.demo</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.7.RELEASE</version>
<relativePath />
<!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-
8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
While starting up the server, i can see that the AutoConfiguration works, but cannot find a bean:
MessageSourceAutoConfiguration matched:
- ResourceBundle found bundle URL [file:/C:/Users/{user}/Downloads/demo/demo/target/classes/messages.properties] (MessageSourceAutoConfiguration.ResourceBundleCondition)
- @ConditionalOnMissingBean (types: org.springframework.context.MessageSource; SearchStrategy: current) did not find any beans (OnBeanCondition)
I tried to also explicitly declare my own bean, but didn't work.
While invoking the endpoint i get the following error:
{
"status": 500,
"error": "Internal Server Error",
"exception": "org.springframework.context.NoSuchMessageException",
"message": "No message found under code 'test' for locale 'el'.",
"path": "/demo"
}
The closest SO question i found was this one (2 years old) about a bug in spring which was fixed couple of versions ago: Spring Boot MessageSourceAutoConfiguration
The issue was my Eclipse encoding configuration, which I haven't managed to fix yet.
After debugging Spring's code (ReloadableResourceBundleMessageSource.java) I could see my key=value property loaded, but with 3 space characters before each character (e.g. t e s t = T h i s i s a d e m o a p p !).
On another PC the same demo application works fine.