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ResourceBundle not found for MessageSource when placed inside a folder

由 我是研究僧i 提交于 2019-11-27 12:29:57

问题


I am trying to use resource bundles with Spring's Message Source. Here is the way I am doing it:

@Component
public class MessageResolver implements MessageSourceAware {

    @Autowired
    private MessageSource messageSource;

    public void setMessageSource(MessageSource messageSource) {
        this.messageSource = messageSource;
    }

    public String getMessage(){
        return messageSource.getMessage("user.welcome", new Object[]{"Rama"} , Locale.US);
    }

}

And here is my folder structure:

messages_en_US.properties contains just one line:

user.welcome=Welcome {0}

Here is the xml configuration used:

<bean name="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
    <property name="basename">
        <value>resourcebundles/messages</value>
    </property>
</bean>

Here is the error I am getting:

WARNING: ResourceBundle [resourcebundles/messages] not found for MessageSource: Can't find bundle for base name resourcebundles/messages, locale en_US
Exception in thread "main" org.springframework.context.NoSuchMessageException: No message found under code 'user.welcome' for locale 'en_US'.

But if I move my resource bundle to directly under the resources folder, it is working fine. In this case, here is the xml configuration I am using:

<bean name="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename">
    <value>messages</value>
</property>

Is is that if I have to use ResourceBundleMessageSource, I should put my resource bundles directly under the resources? If i have to keep it in specified folder only, is there any other way to get this one work?

Thanks!


回答1:


Change your configuration to the following for messageSource bean in your xml file.

<bean name="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource"> 
    <property name="basename"> 
        <value>classpath*:resourcebundles/messages</value> 
    </property> 
</bean>

Since all your properties files are in classpath of java you need to define the path with prefix classpath*: otherwise it will look into the web directory of your application.

Hope this helps you. Cheers.




回答2:


boy, maybe you can change the xml configuration as follows:

use 

org.springframework.context.support.ReloadableResourceBundleMessageSource

instead of

org.springframework.context.support.ResourceBundleMessageSource

all configuration like this:

<bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
    <property name="basename" value="classpath:resourcebundles/messages" />
    <property name="useCodeAsDefaultMessage" value="true" />
</bean>



回答3:


It's nearly 2015 now and I'm using Spring 4.1.2.RELEASE and there's definitely a problem with the way the messageSource bean needs to be configured so it picks up the target resource bundle.

1) If the messageSource bean is of type ReloadableResourceBundleMessageSource it won't work:

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.ReloadableResourceBundleMessageSource;

@Configuration
@ComponentScan(basePackages = { "com.intertech.service" })
//@ImportResource({"classpath:spring/applicationContext-i18n.xml"})
public class AppConfig {

  @Bean(name = "messageSource")
  public ReloadableResourceBundleMessageSource getMessageSource() {
      ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
      messageSource.setBasename("config/messages");
      messageSource.setDefaultEncoding("UTF-8");
      messageSource.setUseCodeAsDefaultMessage(true);
      return messageSource;
  }

//  @Bean(name = "messageSource")
//  public ResourceBundleMessageSource getMessageSource() {
//      ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
//      messageSource.setBasename("config/messages");
//      messageSource.setDefaultEncoding("UTF-8");
//      messageSource.setUseCodeAsDefaultMessage(true);
//      return messageSource;
//  }
}

2) If the messageSource bean is of type ResourceBundleMessageSource it will work:

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.ResourceBundleMessageSource;

@Configuration
@ComponentScan(basePackages = { "com.intertech.service" })
//@ImportResource({"classpath:spring/applicationContext-i18n.xml"})
public class AppConfig {

//  @Bean(name = "messageSource")
//  public ReloadableResourceBundleMessageSource getMessageSource() {
//      ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
//      messageSource.setBasename("config/messages");
//      messageSource.setDefaultEncoding("UTF-8");
//      messageSource.setUseCodeAsDefaultMessage(true);
//      return messageSource;
//  }

  @Bean(name = "messageSource")
  public ResourceBundleMessageSource getMessageSource() {
      ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
      messageSource.setBasename("config/messages");
      messageSource.setDefaultEncoding("UTF-8");
      messageSource.setUseCodeAsDefaultMessage(true);
      return messageSource;
  }
}

3) If you're using an XML configuration file combined with a configuration class - it will work (notice how the base bundle is configured in a class like qualification manner i.e. 'config.messages' not 'config/messages'): (applicationContext-i18n.xml)

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="messageSource"
        class="org.springframework.context.support.ResourceBundleMessageSource"
        p:basename="config.messages"
        p:useCodeAsDefaultMessage="true"/>

    <!-- This will not work -->
    <!--
    <bean id="messageSource"
        class="org.springframework.context.support.ReloadableResourceBundleMessageSource"
        p:basename="config/messages"
        p:useCodeAsDefaultMessage="true"/>
     -->
</beans>

and:

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.ImportResource;

@Configuration
@ComponentScan(basePackages = { "com.intertech.service" })
@ImportResource({"classpath:spring/applicationContext-i18n.xml"})
public class AppConfig {

//  @Bean(name = "messageSource")
//  public ReloadableResourceBundleMessageSource getMessageSource() {
//      ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
//      messageSource.setBasename("config/messages");
//      messageSource.setDefaultEncoding("UTF-8");
//      messageSource.setUseCodeAsDefaultMessage(true);
//      return messageSource;
//  }

//  @Bean(name = "messageSource")
//  public ResourceBundleMessageSource getMessageSource() {
//      ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
//      messageSource.setBasename("config/messages");
//      messageSource.setDefaultEncoding("UTF-8");
//      messageSource.setUseCodeAsDefaultMessage(true);
//      return messageSource;
//  }
}

4) Most importantly... if you're using a WebApplicationInitializer (no web.xml), you've got to register the configuration class that defines the 'messageSource' bean in the root context, not in the dispatcher servlet's context:

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;

import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.ContextLoaderListener;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;

public class WebAppInitializer implements WebApplicationInitializer {

    @Override
    public void onStartup(ServletContext container) throws ServletException {
    // Create the 'root' Spring application context
    AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();
    rootContext.register(AppConfig.class);
    // Manage the lifecycle of the root application context
    container.addListener(new ContextLoaderListener(rootContext));
    // Create the dispatcher servlet's Spring application context
    AnnotationConfigWebApplicationContext dispatcherServlet = new AnnotationConfigWebApplicationContext();
    dispatcherServlet.register(MvcConfig.class);
    // Register and map the dispatcher servlet
    ServletRegistration.Dynamic dispatcher = container.addServlet("dispatcher", new DispatcherServlet(
            dispatcherServlet));
    dispatcher.setLoadOnStartup(1);
    dispatcher.addMapping("*.htm");
    }
}



回答4:


In my case, using Spring 4.3.2.RELEASE and java config and a ReloadableResourceBundleMessageSource, I had to define my template engine as a bean otherwise my messages were not getting resolved.

Here's a sample of a working configuration.

AppConfig.java

import java.util.concurrent.TimeUnit;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.MessageSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.ReloadableResourceBundleMessageSource;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.spring4.SpringTemplateEngine;
import org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver;
import org.thymeleaf.spring4.view.ThymeleafViewResolver;
import org.thymeleaf.templatemode.TemplateMode;
import org.thymeleaf.templateresolver.ITemplateResolver;

@Configuration
@EnableWebMvc
@ComponentScan("myapp")
public class AppConfig extends WebMvcConfigurerAdapter implements ApplicationContextAware {

private ApplicationContext applicationContext;

private static final boolean CACHE_THYMELEAF_TEMPLATES = false;
private final String UTF8_ENCODING = "UTF-8";

@Override
public void setApplicationContext(ApplicationContext applicationContext) {
    this.applicationContext = applicationContext;
}

@Bean
public ViewResolver viewResolver() {
    ThymeleafViewResolver resolver = new ThymeleafViewResolver();
    resolver.setTemplateEngine(templateEngine());
    resolver.setCharacterEncoding(UTF8_ENCODING);
    resolver.setCache(CACHE_THYMELEAF_TEMPLATES);
    return resolver;
}

@Bean
public TemplateEngine templateEngine() {
    //this method must be defined as a bean otherwise i18n messages are not found
    //if method defined as private TemplateEngine templateEngine() messages are not found
    SpringTemplateEngine engine = new SpringTemplateEngine();
    engine.setEnableSpringELCompiler(true);
    engine.addTemplateResolver(templateResolver());
    return engine;
}

private ITemplateResolver templateResolver() {
    SpringResourceTemplateResolver resolver = new SpringResourceTemplateResolver();
    resolver.setApplicationContext(applicationContext);
    resolver.setPrefix("/WEB-INF/thymeleaf/");
    resolver.setTemplateMode(TemplateMode.HTML);
    resolver.setSuffix(".html");
    resolver.setCacheable(CACHE_THYMELEAF_TEMPLATES);
    resolver.setCharacterEncoding(UTF8_ENCODING);
    return resolver;
}   

@Bean
public MessageSource messageSource() {
    ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
    messageSource.setBasenames("WEB-INF/i18n/messages");
    messageSource.setUseCodeAsDefaultMessage(true);
    messageSource.setDefaultEncoding(UTF8_ENCODING);
    messageSource.setFallbackToSystemLocale(false);
    messageSource.setCacheSeconds((int)TimeUnit.HOURS.toSeconds(1));
    return messageSource;
}

}



回答5:


 <!-- Application Message Bundle -->
<bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
    <property name="basename" value="resourcebundles/messages" />
</bean>

You have to configure your messages path as shown above. Also, check class name.




回答6:


I have used following configuration and it is working fine

<beans:bean id="messageSource class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
        <beans:property name="basename" value="classpath:resourcebundles/ScreenLabelResources" />
    </beans:bean>



回答7:


What worked for me was something really simple.

It was 

<property name="basename">
            <value>locale\messages</value>
        </property>

I changed it to

<property name="basename">
            <value>locale/messages</value>
        </property>

Just a \ to / change fixed it for me. I am using a MAC.

I have not tried *classpath, that may not have worked for me.




回答8:


I have used following configuration and it is working fine in my project. My messages.properties is in below path: ..\WebContent\WEB-INF\resources

<bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
    <property name="basename" value="classpath:WEB-INF/resources/messages" />
    <property name="useCodeAsDefaultMessage" value="true" />
</bean>



回答9:


I have used following configuration and it is working fine in my project.

<bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
    <property name="basename" value="classpath:configurations/messages" />
    <property name="useCodeAsDefaultMessage" value="true" />
</bean>

location: src\main\resources\configurations\messages_en.properties




回答10:


YAML version for this

  spring:
     messages:
       basename: i18n/validation, i18n/message # for multiple properties just use comma separated values
       encoding: UTF-8

You can refer to documentation to see full description.

Also I should mention that the default MessageSource bean is a ResourceBundleMessageSource which is already reading form a classpath so there is no need to use nonation like classpath:i18n/validation.

Directory structure



来源：https://stackoverflow.com/questions/11150869/resourcebundle-not-found-for-messagesource-when-placed-inside-a-folder

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