动态切换Struts2的国际化

文章由LinuxBoy分享于2019-03-31 11:03:30热评（491）

动态切换Struts2的国际化

思路：

1.在struts.xml中配置好默认的语言：

2.在jsp页面中，设置一些链接(<a></a>)，这些链接是Action类，然后通过这些链接，在Action中设置好相应的参数, 并将它保存在application对象中。

3.在跳转后的jsp页面中，通过获取application对象的相应的属性的值，以后在相应的表单中通过设置隐藏属性<input type="hidden" name="request_locale" value="<%= (String)application.getAttribute("language") />，这样子在以后的跳转页面都会显示相应的语言了。

4.具体的代码如下：

<?xml version="1.0" encoding="UTF-8" ?>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Login</title>
</head>
<body>
<%
   String lang = (String)application.getAttribute("lang");
   if (lang == null)
   {
       lang = "zh_CN";
   }
   session.setAttribute("language", lang);
%>
<table align="center" border="1">
   <caption>Login</caption>
   <s:form method="post" name="loginForm" action="Login" namespace="/" validate="false">
       <tr>
           <td>
               <s:text name="label_user"></s:text>
           </td>
           <td>
               <s:textfield name="userName" size="20"></s:textfield>
           </td>
       </tr>

       <tr>
           <td>
               <s:text name="label_password"></s:text>
           </td>
           <td>
               <s:textfield name="passWord" size="20"></s:textfield>
           </td>
       </tr>
       <input type="hidden" name="request_locale" value="<%=(String)session.getAttribute("language")%>"/>
       <tr>
           <td colspan="2" align="center">
               <s:submit type="input" key="label_submit"></s:submit>
               <s:reset type="password" key="label_reset"></s:reset>
           </td>
       </tr>

       <tr>
           <td colspan="2">
               <s:fielderror>
               </s:fielderror>
           </td>
       </tr>
   </s:form>
</table>

<s:url id="zhongwen" action="ChangeLang.action">
<s:param name="language">zh_CN</s:param>
</s:url>
<s:a href="%{zhongwen}">中文</s:a>

<s:url id="english" action="ChangeLang.action">
<s:param name="language">en_US</s:param>
</s:url>
<s:a href="%{english}">英文</s:a>
</body>
</html>

//User Model

package yang.www;

public class UserBean
{
   private String userName;
   private String passWord;


   public UserBean(){}


   public String getUserName() {
       return userName;
   }
   public String getPassWord() {
       return passWord;
   }


   public void setUserName(String userName) {
       this.userName = userName;
   }
   public void setPassWord(String passWord) {
       this.passWord = passWord;
   }
}

//进行语言的设置：

package yang.www;

import java.util.Locale;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class ChangeLang extends ActionSupport
{
   /**
   *
   */
   private static final long serialVersionUID = 1L;
   private String language;

   public String getLanguage() {
       return language;
   }
   public void setLanguage(String language) {
       this.language = language;
   }
   public String execute()
   {
       String[] strings = this.getLanguage().split("_");
       Locale locale = new Locale(strings[0], strings[1]);
       ServletActionContext.getContext().setLocale(locale);
       ActionContext.getContext().getApplication().put("lang", this.getLanguage());
       return SUCCESS;
   }
}

//Login Action

package yang.www;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

public class Login extends ActionSupport implements ModelDriven<UserBean>
{
   /**
   *
   */
   private static final long serialVersionUID = 1L;
   private UserBean user = new UserBean();
   @Override
   public UserBean getModel() {
       // TODO Auto-generated method stub
       return user;
   }

   ActionContext context = ActionContext.getContext();
   public String execute()
   {
       boolean rightUser = "yangzhiyong".equals( this.getModel().getUserName() );
       boolean rightPassWord = "yangzhiyong".equals(this.getModel().getPassWord());
       if ( rightUser && rightPassWord )
       {
           context.getSession().put("username", this.getModel().getUserName());
           return SUCCESS;
       }
       else
       {
           return ERROR;
       }
   }

   public void validate()
   {
       if (this.getModel().getUserName().length() < 6 )
       {
           this.addFieldError("userName", this.getText("label_userError"));
       }
       if (this.getModel().getPassWord().length() < 5)
       {
           this.addFieldError("passWord", this.getText("label_passwordError"));
       }
   }
}

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.locale" value="zh_CN" />
   <constant name="struts.custom.i18n.resources" value="i18n/myMessage" />

   <constant name="struts.ui.theme" value="simple" />
   <constant name="struts.ui.templateDir" value="template" />
   <constant name="struts.ui.templateSuffix" value="ftl" />

    <package name="hello" extends="struts-default" namespace="/">
       <action name="Login" class="yang.www.Login">
              <result name="success">/jsp/welcome.jsp</result>
              <result name="error">/jsp/error.jsp</result>
              <result name="input">/index.jsp</result>
       </action>
       <action name="ChangeLang" class="yang.www.ChangeLang" >
              <result name="success">/index.jsp</result>
       </action>
    </package>

    

</struts>

//error.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Login Error</title>
</head>
<body>
<h1>Sorry login failed!</h1>
</body>
</html>

//welcome.jsp

完整可运行的例子，可以到我的资源里下载。这样子可能会更加理解一点。

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动态切换Struts2的国际化