User类（将前台传来的字符串要转化的类，即一个pojo类）
package com.hcj.model;
public class User {
public String username;
public 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 User() {
super();
}
}
前台代码：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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>Insert title here</title>
</head>
<body>
<h1>用户类型转换器，用户名和密码间用英文逗号隔开</h1>
<form action="testManyUserAction!test.action" method="post">
请输入用户信息<input type="text" name="user">
请输入客人信息<input type="text" name="user">
<input type="submit" value="提交">
</form>
</body>
</html>package com.hcj.typeConvent;
import java.util.Map;
import org.apache.struts2.util.StrutsTypeConverter;
import com.hcj.model.User;
//自定义类型转换器类要实现TypeConverter借口，这里继承实现该接口的StrutsTypeConverter
public class MyTypeConvent2 extends StrutsTypeConverter{
@Override
//处理将字符串类型转换成复合类型的方法
public Object convertFromString(Map context, String[] values, Class toClass) {
//如果请求参数数组的长度大于1
if(values.length > 1){
//创建一个User实例
User[] result = new User[values.length];
//遍历请求参数数组
for (int i = 0; i < result.length; i++) {
User user = new User();
String[] userValue = values[i].split(",");
user.setUsername(userValue[0]);
user.setPassword(userValue[1]);
result[i] = user;
}
return result;
}else{
//请求参数数组的长度为1
User user = new User();
String[] userValue = values[0].split(",");
user.setUsername(userValue[0]);
user.setPassword(userValue[1]);
return user;
}
}
@Override
//处理把复合类型转换成字符串类型的方法
public String convertToString(Map context, Object o) {
//如果需要转换的值为单个的User实例
if(o instanceof User){
User user = (User)o;
return "<" + user.getUsername() + "," + user.getPassword() + ">";
}
//如果需要转换的值是User数组
else if(o instanceof User[]){
User[] users = (User[])o;
String result = "[";
for(User user : users){
result += "<" + user.getUsername() + "," + user.getPassword() + ">";
}
return result;
}
return "";
}
}
#制定com.hcj.model.User的类型转换器为com.hcj.typeConvent.MyTypeConvent.MyTypeConvent2 com.hcj.model.User=com.hcj.typeConvent.MyTypeConvent2
原文地址：http://blog.csdn.net/u011768325/article/details/45310381
