struts2--struts2国际化（使用占位符）

今天药忘吃喽~ 2024-02-18 14:17 60阅读 0赞

在java国际化当中，使用MessageFormat类来填充占位符，而在struts2中则采用两种更简单的方式填充：

1）在jsp页面中填充国际化消息时的占位符：

在标签<s:text>下使用<s:param>标签传递值来填充占位符

2）在Action中填充国际化消息时的占位符：

可以调用getText(String key , List args)或者getText(String key , String\[\] args)方法来填充占位符

实例：简单的登录系统：

登录界面：

国际化资源globalMessage\_en\_US.properties：

succ = {0},Welcome,you have logged in!
    fail = {0},Sorry,You can't log in!
    welcome = {0},Hello!Now is {1}!

globalMessage\_zh\_CN.properties

succ = {0},\u6B22\u8FCE\uFF0C\u60A8\u5DF2\u7ECF\u6210\u529F\u767B\u5F55\uFF01
    fail = {0},\u5BF9\u4E0D\u8D77\uFF0C\u60A8\u767B\u5F55\u5931\u8D25
    welcome = {0},\u60A8\u597D\uFF0C\u73B0\u5728\u65F6\u95F4\u662F {1}!

![Center][]  
  
  
  
LoginAction:为了在Action中输出带有占位符的消息，在Action类中调用ActionSupport类的getText方法，并填入参数值填充占位符

package com.action;
    
    import com.opensymphony.xwork2.ActionContext;
    import com.opensymphony.xwork2.ActionSupport;
    
    public class LoginAction extends ActionSupport{
    	private String username;
    	private String password;
    	
      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;
    	}
    
    public String execute() {
    	ActionContext ctx = ActionContext.getContext();
    	if(username.equals("admin") && password.equals("admin")){
    		ctx.getSession().put("user", username);
    		ctx.put("tip", getText("succ",new String[]{username}));
    		return SUCCESS;
    	}else {
    		ctx.put("tip", getText("fail", new String[]{username}));
    		return SUCCESS;
    	}
    	
    }
    }

welcome.jsp输出页面：为了在jsp页面输出带参数的占位符，需要使用到上面提过的<s:text/>和字标签<s:param/>

<body>
        ${requestScope.tip}<br><br>
        <jsp:useBean id= "date" class = "java.util.Date" scope = "page"/>
        <s:text name="welcome">
          <s:param>
            <s:property value = "username"/>
          </s:param>
          
          <s:param>${date}</s:param>
        </s:text>
      </body>

struts.xml配置：

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN"
        "http://struts.apache.org/dtds/struts-2.1.7.dtd">
        
        <struts>
         <constant name="struts.custom.i18n.resources" value="globalMessage"/>
         
         <package name="default" namespace = "/" extends="struts-default">
            <action name="login" class = "com.action.LoginAction">
              <result>/welcome.jsp</result>
              <result name = "login">/index.jsp</result>
            </action>
         </package>
        </struts>

实现效果：

![Center 1][]

![Center 2][]

[Center]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/14f61b698d4942109ee106df0c75149d.png
[Center 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/c8e25d4de9f44547a357f231a8f10daa.png
[Center 2]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/f8161ea6529b4c3aadd412351974b6de.png