Spring Localization Using Java Configuration

Now I will guide you how to performing Localization in Spring using Java Configuration, this is our goal :

Localization Message (English)

Localization Message (English)

as default page will showing simple text hello world in English, and when you click “In” at the top-right, these sentence will translate into Bahasa Indonesia.

Localization Message (Indonesia)

Localization Message (Indonesia)

our_goal_localize_2

Before we start to write code, firstly I would like to show you the project structure, because we don’t use xml configuration, so we write all configuration in Java.

Project Structure

Project Structure

Okay and now it’s time to coding … ¬†First create Class ConfigManager.java to make configuration is more easily, please see picture above for the detail package.

ConfigManager.java

package com.hidupbersahaja.rnd.sys.config;

import org.apache.commons.configuration.Configuration;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.PropertiesConfiguration;

public class ConfigManager {
	private static PropertiesConfiguration config = null;

    static {
        try {
            config = new PropertiesConfiguration();
            config.setBasePath("config");
            config.setFileName("config/config.properties");
            config.load();
        } catch (ConfigurationException e) {
            throw new RuntimeException("Please configure config.properties properly", e);
        }
    }

    private ConfigManager(){
    }

    public static Configuration getConfiguration(){
        return config;
    }
}

then write some code at your Web Application Config Class  :

WebAppConfig.java

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = { "com.hidupbersahaja.rnd" })
public class WebAppConfig extends WebMvcConfigurerAdapter{

	private org.apache.commons.configuration.Configuration _config = ConfigManager.getConfiguration();

    @Bean
    public ReloadableResourceBundleMessageSource messageSource(){
    	ReloadableResourceBundleMessageSource bundleSource = new ReloadableResourceBundleMessageSource();
    	bundleSource.setDefaultEncoding("UTF-8");
    	bundleSource.setBasename(_config.getString("locale.language.basename"));
    	return bundleSource;
    }

    @Bean
    public CookieLocaleResolver localeResolver(){
    	CookieLocaleResolver localeResolver = new CookieLocaleResolver();
    	localeResolver.setDefaultLocale(new Locale(_config.getString("locale.language.default")));
    	localeResolver.setCookieName("localCookie");
    	localeResolver.setCookieMaxAge(3600);
    	return localeResolver;
    }
}

at the config.poperties, you can set some configuration such as default language, language param, etc

config.properties

#####################################################################################
# SYSTEM UTILITY
#####################################################################################
locale.language.default=en
locale.language.basename=classpath:language/messages
locale.language.param=lang

create 2 files properties that represent message for each language, such as messages_en.properties for English and messages_in.properties for Bahasa Indonesia, please see project structure for the detail package

messages_en.properties

hello.world=Hello World from INDONESIA !

messages_in.properties

hello.world=Hallo Dunia dari INDONESIA !

at the index.jsp

<%@ include file="../jsp/common/taglibs.jsp"%>
<spring:message code="hello.world" />

And the last for the button chooser EN / IN you can add parameter language (currentURL?lang=en)

<ul class="nav navbar-nav navbar-right">
          		<%
			    	String currentUrl = request.getAttribute("javax.servlet.forward.servlet_path").toString();
			    %>
	            <li class="active">
	            	<a href="${currentUrl }?lang=en">En</a>
	            </li>
	            <li>
	            	<a href="${currentUrl }?lang=in">In</a>
	            </li>
	          </ul>

for the detail list country you can check at :

http://www.java2s.com/Code/Java/I18N/iso6392languagecodecsv.htm

That’s all, Have a nice Weekend !

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