Struts 2 i18n

✔ STRUTS 2 CHAPTERS:-

1. Struts2 Overview
2. Struts2 Architecture
3. Struts2 Configuration Files
4. Action in Struts2
5. Action in Struts2 by using Pojo Class
6. Action in struts2 by Implementing Action Interface
7. Action in Struts2 by Extending Action Support Class
8. Struts2 Hello World Example
9. Multiple Configuration File in Struts2
10. OGNL in Struts2
11. Value Stack in Struts2
12. Interceptors in Struts2
13. Struts2 Execandwait Interceptor
14. Struts2 Custom Interceptor
15. Struts2 Result type
16. Struts2 Redirect result type
17. Struts2 Validation Framework
18. Struts2 Validation by Built in validators
19. Struts2 i18n
20. Struts2 Zero Configuration by convention approach
21. Struts2 Zero Configuration by annotation Approach
22. Dispatch Action Functionality in Struts2
23. Dynamic method invocation in Struts2
24. Struts2 UI Tags
25. Struts2 Control Tags
26. Struts2 Data Tags
27. Struts2 and tiles integration
28. Struts2 and Quartz2 Schedular
29. Struts2 Interview Questions and Answers



Internationalization or i18n is the process of designing a software application in such a way so that it can potentially be adapted to various languages and regions without changes.
Struts framework provides the i18n interceptor to achieve internationalization.

Struts 2 i18n example:

login.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" 
    pageEncoding="ISO-8859-1"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
 
<html>
 <head>
  <title>Struts 2 i18n localization example.</title>
 </head>
 
 <body>
  <h3>Struts 2 i18n localization example.</h3>
 
  <s:form action="login" namespace="/user">
 
    <s:textfield key="label.username" name="userName" />
    <s:password key="label.password" name="password"/> 
    <s:submit key="label.submit" 
                                     name="submit" align="center"/>
 
  </s:form>
 
  <s:url id="localeEN" namespace="/" action="locale" >
     <s:param name="request_locale" >en</s:param>
  </s:url>
  <s:url id="localeDE" namespace="/" action="locale" >
     <s:param name="request_locale" >de</s:param>
  </s:url>
 
  <s:a href="%{localeEN}" >English</s:a>
  <s:a href="%{localeDE}" >German</s:a>
 
 </body>
</html>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
 xmlns="http://java.sun.com/xml/ns/javaee" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
 http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
 
 
  <filter>
  <filter-name>struts2</filter-name>
  <filter-class>
         org.apache.struts2.dispatcher.ng.
         filter.StrutsPrepareAndExecuteFilter
        </filter-class>
 </filter>
 
 <filter-mapping>
  <filter-name>struts2</filter-name>
  <url-pattern>/*</url-pattern>
 </filter-mapping>
 
 <welcome-file-list>
   <welcome-file>test.jsp</welcome-file>
 </welcome-file-list>
 
</web-app>
struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
 
<struts>
 
 <constant name="struts.custom.i18n.resources" value="global" />
 
 <package name="user" namespace="/user" extends="struts-default">
 
   <action name="login" class="com.javawithease.action.Login">
  <result name="success">/welcome.jsp</result>
  <result name="input">/login.jsp</result>
   </action>
 
 </package>
 
 <package name="default" namespace="/" extends="struts-default">
 
   <action name="locale" class="com.javawithease.action.Locale">
  <result name="success">/login.jsp</result>
   </action>
 
 </package>
 
</struts>
Login.java
import com.opensymphony.xwork2.ActionSupport;
 
/**
 * This class is used as an action class for login process.
 * @author javawithease
 */
public class Login extends ActionSupport {
 //data members
 private String userName;
 private String password;
 
 public String execute(){
  return SUCCESS;
 }
 
 public void validate(){
   if(userName.trim().equals("")){
      addFieldError("userName", getText("userName.required"));
   }
   if(password.trim().equals("")){
     addFieldError("password", getText("password.required"));
   }
 }
 
 public String getUserName() {
  return userName;
 }
 
 public void setUserName(String userName) {
  this.userName = userName;
 }
 
 public String getPassword() {
  return password;
 }
 
 public void setPassword(String password) {
  this.password = password;
 } 
}
Locale.java
import com.opensymphony.xwork2.ActionSupport;
 
/**
 * This class is used as an action class for locale.
 * @author javawithease
 */
public class Locale extends ActionSupport{
 public String execute(){
  return SUCCESS;
 }
}
global.properties
label.username = UserName
label.password = Password
label.submit = Submit
global_de.properties
label.username = Benutzername
label.password = Kennwort
label.submit = Einreichen
login.properties
userName.required = Username is required.
password.required = Password is required.
login_de.properties
userName.required = Benutzername ist erforderlich.
password.required = Passwort ist erforderlich.
welcome.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="ISO-8859-1" %>
<%@ taglib uri="/struts-tags" prefix="s"%>
 
<html>
 <head>
  <title>Struts 2 i18n localization example.</title>
 </head>
 <body>
  <h3>Hello <s:property value="userName"/></h3>
 </body>
</html>

Output:


 
Click on German link.

 

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