Srtuts2学习笔记--批量类型转换

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第一步: javabean

package com.wenj.bean;

public class User {

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 setAge(String password) {

this.password = password;

}

第二步: Action类 Action配置

Action类

package com.wenj.struts;

import java.util.List;

import com.opensymphony.xwork2.ActionSupport;

import com.wenj.bean.User;

public class UsersAction extends ActionSupport {

private List<User> users;

@Override

public String execute() throws Exception {

return SUCCESS;

}

public List<User> getUsers() {

return users;

}

public void setUsers(List<User> users) {

this.users = users;

}

Action配置

在struts.xml添加如下代码:

<result name="success">mulconvertresult.jsp</result>

</action>

第三步: Converter类 Converter配置

Converter类

package com.wenj.converter;

import java.util.ArrayList;

import java.util.List;

import java.util.Map;

import java.util.StringTokenizer;

import ognl.DefaultTypeConverter;

import com.wenj.bean.User;

public class UsersConverter extends DefaultTypeConverter {

@Override

public Object convertValue(Map context, Object value, Class toType) {

if(toType == List.class){

List<User> users = new ArrayList<User>();

String[] strs = (String[])value;

for(String str: strs){

StringTokenizer strToken = new StringTokenizer(str, ";");

String username = strToken.nextToken();

String age = strToken.nextToken();

User user = new User();

user.setUsername(username);

user.setAge(age);

users.add(user);

}

return users;

}else if(toType == String.class){

List<User> users = (ArrayList<User>)value;

String str = "";

for(User user: users){

str+=("username: " + user.getUsername() + " age: " + user.getAge());

}

return str;

}

return null;

}

Converter配置

在Action当前目录下新建一个名为”UsersAction-conversion.properties”配置文件

并在文件中添加如下代码:

users=com.wenj.converter.UsersConverter

第四步: 用户登入接口

1 moreiusernfo.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

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>

<title>Login Page</title>

<!--

-->

</head>

<body>

user0info: <input type="text" name="users"/> <br>

user1info: <input type="text" name="users"/> <br>

user2info: <input type="text" name="users"/> <br>

user3info: <input type="text" name="users"/> <br>

</form>

</body>

</html>

2 moreconvertresult.jsp

<%@page import="javax.swing.text.html.HTML.Tag"%>

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<%@ taglib prefix="s" uri="/struts-tags"%>

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>

<title>Convertresult.jsp</title>

<!--

-->

</head>

<body>

<s:property value="users"/><br>

</body>

</html>

最后启动tomcat,在浏览器中键入:

http://localhost:8080/struts2/moreuserinfo.jsp

即可进行访问

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