struts2学习笔记之转换器实现语言切换
第一步,在工程src目录下新建属性文件struts.properties,内容如下:struts.custom.i18n.resources=globalMessages
第二步,在工程src目录下新建属性文件globalMessages_zh_CN.properties,内容如下:
HelloWorld=\u4f60\u597d
第三步,在工程src目录下新建属性文件globalMessages_en_US.properties,内容如下:
HelloWorld=Hello World
第四步,实现处理表单的Action,HelloWorld代码如下:
package com.dadao.struts2;
import java.util.Locale;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.util.LocalizedTextUtil;
public class HelloWorld extends ActionSupport {
private static final long serialVersionUID = 1L;
private Locale loc;
private String message;
@Override
public String execute() throws Exception {
message=LocalizedTextUtil.findDefaultText("HelloWorld",loc);
return SUCCESS;
}
public Locale getLoc() {
return loc;
}
public void setLoc(Locale loc) {
this.loc = loc;
}
public String getMessage() {
return message;
}
}
第五步,实现转换器LocalConverter,代码如下:
package com.dadao.struts2;
import java.util.Locale;
import java.util.Map;
import ognl.DefaultTypeConverter;
public class LocalConverter extends DefaultTypeConverter {
@Override
public Object convertValue(Map context, Object value, Class toType) {
if(toType==Locale.class){
String local=((String[])value);
return new Locale(local.substring(0,2),local.substring(3));
}else if(toType==String.class){
Locale local=(Locale)value;
return local.toString();
}
return null;
}
}
第六步,在工程src目录下新建属性文件xwork-conversion.properties,内容如下:
java.util.Locale=com.dadao.struts2.LocalConverter
第七步,配置struts.xml文件,代码如下:
<?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>
<package name="strutsPackage" extends="struts-default">
<action name="HelloWorld" class="com.dadao.struts2.HelloWorld">
<result>/index.jsp</result>
</action>
</package>
</struts>
第八步,完成index.jsp,代码如下:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<s:form action="HelloWorld" method="post">
input language:<s:textfield name="loc"></s:textfield>
<br><s:submit></s:submit>
</s:form>
<s:property value="message"/>
</body>
</html>
第九步,测试,
可在文本框中输入"en_US"和"zh_CN",并提交,查看效果
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