Struts2--类型转换

最新推荐文章于 2025-08-23 19:36:46 发布

转载最新推荐文章于 2025-08-23 19:36:46 发布 · 52 阅读

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CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/wujixing/p/5395887.html

文章标签：

#java

本文介绍Struts2框架中如何实现不同类型的数据转换，包括基本数据类型、集合及自定义对象等。通过示例展示了如何配置自定义转换器并应用于实际场景。

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struts.xml:

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"
    "http://struts.apache.org/dtds/struts-2.1.dtd">

<struts>


	<constant name="struts.devMode" value="true"></constant>
	<package name="test" namespace="/" extends="struts-default">

		<action name="test" class="com.bjsxt.action.TestAction">
			<result>/test.jsp</result>
		</action>

	</package>


</struts>

TestAction.java:

package com.bjsxt.action;

import java.awt.Point;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.Set;

import com.opensymphony.xwork2.ActionSupport;

public class TestAction extends ActionSupport {
	
	private String name;
	private int age;
	private Date d;
	Set<String> interests;
	Map<String, String> users;
	Point p;
	
	List<Point> ps;
	Map<String, Point> points;
	
	
	@Override
	public String execute() throws Exception {
		
		return super.execute();
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

	public Date getD() {
		return d;
	}

	public void setD(Date d) {
		this.d = d;
	}

	public Set<String> getInterests() {
		return interests;
	}

	public void setInterests(Set<String> interests) {
		this.interests = interests;
	}

	public Map<String, String> getUsers() {
		return users;
	}

	public void setUsers(Map<String, String> users) {
		this.users = users;
	}

	public Point getP() {
		return p;
	}

	public void setP(Point p) {
		this.p = p;
	}

	public List<Point> getPs() {
		return ps;
	}

	public void setPs(List<Point> ps) {
		this.ps = ps;
	}

	public Map<String, Point> getPoints() {
		return points;
	}

	public void setPoints(Map<String, Point> points) {
		this.points = points;
	}

	

}

全局注册转换 src下新建属性文件: /xwork-conversion.properties

java.awt.Point=com.bjsxt.converter.MyPointConverter

如果局部: 放在action包下: /TestAction-conversion.properties:

p=com.bjsxt.converter.MyPointConverter

转换java:

package com.bjsxt.converter;

import java.awt.Point;
import java.util.Map;

import org.apache.struts2.util.StrutsTypeConverter;

public class MyPointConverter extends StrutsTypeConverter{



	@Override
	public Object convertFromString(Map context, String[] values, Class toClass) {
		
			Point p = new Point();
			String[] strs = (String[])values;
			String[] xy = strs[0].split(",");
			p.x = Integer.parseInt(xy[0]);
			p.y = Integer.parseInt(xy[1]);
			return p;		
	}

	@Override
	public String convertToString(Map context, Object o) {
		// TODO Auto-generated method stub
		return o.toString();
	}

}

如下访问:

http://localhost:8080/struts2_3700_type_conversion/test?name=a&age=20
http://localhost:8080/struts2_3700_type_conversion/test?&d=1988-08-08 12:39:56
http://localhost:8080/struts2_3700_type_conversion/test?&interests=math&interests=english
http://localhost:8080/struts2_3700_type_conversion/test?&users['a']=usera&users['b']=userb
http://localhost:8080/struts2_3700_type_conversion/test?p=2,3

test.jsp:

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>Type Conversion</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
  	name:<s:property value="name"/><br/>
  	age:<s:property value="age"/><br/>
  	date:<s:property value="d"/><br/>
  	<s:date name="d" format="yyyy/MM/dd HH:mm:ss"/><br/>
  	<s:property value="interests"/><br/>
  	<s:property value="users"/><br/>
  	<s:property value="p"/><br/>
  	<s:property value="ps"/><br/>
  	points:<s:property value="points"/><br/>
  	
  </body>
</html>

测试结果:

http://localhost:8080/struts2_3700_type_conversion/test?d=1988-08-08 12:39:56

http://localhost:8080/struts2_3700_type_conversion/test?interests=math&interests=english
[math, english]


http://localhost:8080/struts2_3700_type_conversion/test?name=a&age=20
结果:
name:a
age:20

http://localhost:8080/struts2_3700_type_conversion/test?d=1988-08-08 12:39:56
结果: 1988/08/08 12:39:56

http://localhost:8080/struts2_3700_type_conversion/test?interests=math&interests=english
结果: [math, english]


http://localhost:8080/struts2_3700_type_conversion/test?users['a']=usera&users['b']=userb
结果: {b=userb, a=usera}

http://localhost:8080/struts2_3700_type_conversion/test?p=2,3
java.awt.Point[x=2,y=3]

http://localhost:8080/struts2_3700_type_conversion/test?ps=2,3&ps=9,0
结果:[java.awt.Point[x=2,y=3], java.awt.Point[x=9,y=0]]

http://localhost:8080/struts2_3700_type_conversion/test?points['a']=8,9&points['b']=1,0
结果: points:{b=java.awt.Point[x=1,y=0], a=java.awt.Point[x=8,y=9]}

转载于:https://www.cnblogs.com/wujixing/p/5395887.html