struts2返回json数据类型

最新推荐文章于 2019-03-04 09:39:00 发布

原创最新推荐文章于 2019-03-04 09:39:00 发布 · 2k 阅读

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#struts2返回json数据类型

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本文介绍了一个使用Struts2框架实现JSON数据交互的实战案例，包括web.xml配置、struts.xml配置文件详解及UserAction类的具体实现。

项目需要jar包

项目结构

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
	<display-name></display-name>
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>

	<!-- 定义Struts2的FilterDispathcer的Filter -->
	<filter>
		<filter-name>struts2</filter-name>
		<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
	</filter>
	<!-- FilterDispatcher用来初始化Struts2并且处理所有的WEB请求。 -->
	<filter-mapping>
		<filter-name>struts2</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

</web-app>

struts.xml

<?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>
	<!-- 配置了系列常量 -->
	<constant name="struts.i18n.encoding" value="UTF-8" />

	<package name="wangzs" extends="json-default">
		<action name="userAction" class="com.wzs.action.UserAction">
			<result name="success" type="json">
				<param name="root">result</param>
			</result>
		</action>
		<!-- 让用户直接访问该应用时列出所有视图页面 -->
		<action name="">
			<result>.</result>
		</action>
	</package>
</struts>

testJson.jsp

<%@ page language="java" pageEncoding="UTF-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>

<title>test json</title>

<script type="text/javascript" src="scripts/jquery-1.8.js"></script>
<script type="text/javascript">
	$(function() {
		$("#testJson").click(function() {
			$.ajax({
				type : "post",
				url : "userAction",
				data : {
					name : $("#name").val(),
					age : $("#age").val(),
					address : $("#address").val()
				},
				dataType : "json",
				success : function(data) {
					var d = eval("(" + data + ")");//将数据转换成json类型
					$("#s_name").text("" + d.name + "");
					$("#s_age").text("" + d.age + "");
					$("#s_address").text("" + d.address + "");
				},
				error : function() {
					alert("系统异常，请稍后重试！");
				}
			});
		});
	})
</script>
</head>

<body>
	This is wangzs page.
	<br>
	<table border="1">
		<tr>
			<td>用户名：</td>
			<td><input type="text" name="name" id="name" /></td>
		</tr>
		<tr>
			<td>年龄：</td>
			<td><input type="text" name="age" id="age" /></td>
		</tr>
		<tr>
			<td>地址：</td>
			<td><input type="text" name="address" id="address" /></td>
		</tr>
		<tr>
			<td colspan="2"><input type="button" value="测试json" id="testJson" /></td>
		</tr>
	</table>
	<br />
	<ul>
		<li>姓名：<span id="s_name">赞无数据</span></li>
		<li>年龄：<span id="s_age">暂无数据</span></li>
		<li>职务：<span id="s_address">暂无数据</span></li>
	</ul>
</body>
</html>

UserAction.java

package com.wzs.action;

import java.util.HashMap;
import java.util.Map;

import net.sf.json.JSONObject;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport {

	private String name;
	private String age;
	private String address;

	private String result;

	@Override
	public String execute() throws Exception {
		Map<String, String> map = new HashMap<String, String>();
		map.put("name", getName());
		map.put("age", getAge());
		map.put("address", getAddress());

		JSONObject jsonObject = JSONObject.fromObject(map);// 将map对象转换成json类型数据
		result = jsonObject.toString();// 给result赋值，传递给页面
		return SUCCESS;
	}

	public String getName() {
		return name;
	}

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

	public String getAge() {
		return age;
	}

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

	public String getAddress() {
		return address;
	}

	public void setAddress(String address) {
		this.address = address;
	}

	public String getResult() {
		return result;
	}

	public void setResult(String result) {
		this.result = result;
	}

}

项目源码下载：http://download.youkuaiyun.com/detail/adam_zs/7452839