菜鸟学习Spring——SpringMVC注解版在服务器端获取Json字符串并解析

一、概述。
       SpringMVC在服务端把客户端传过来的JSON字符串，并把JSON字符串转成 JSON对象并取得其中的属性值，这个在项目中经常用到。
二、代码演示。

需要添加的jar包。


2.1 web.xml。

	<?xml version="1.0" encoding="UTF-8"?>
	<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	 	xmlns="http://xmlns.jcp.org/xml/ns/javaee" 
	 	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
	  	id="WebApp_ID" version="3.1">
	<filter>
		<filter-name>encodingFilter</filter-name>
		
		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
		
		<init-param>
			<param-name>encoding</param-name>
			<param-value>utf-8</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>encodingFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
	
	<servlet>
			<servlet-name>springMVC</servlet-name>
			<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
			<load-on-startup>1</load-on-startup>
		</servlet>
		<servlet-mapping>
			<servlet-name>springMVC</servlet-name>
			<url-pattern>*.spring</url-pattern>
		</servlet-mapping>
		<welcome-file-list>
			<welcome-file>index.jsp</welcome-file>
		</welcome-file-list>
	</web-app>


2.2springMVC-servlet.xml。

	<?xml version="1.0" encoding="UTF-8"?>
	<beans xmlns="http://www.springframework.org/schema/beans"
		xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
		xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context"
		xsi:schemaLocation="
	        http://www.springframework.org/schema/beans 
	        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
	        http://www.springframework.org/schema/context 
	        http://www.springframework.org/schema/context/spring-context-3.0.xsd
	          http://www.springframework.org/schema/mvc 
	        http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd">
		
		<context:component-scan base-package="com.gaowei.JSON" />
	
		<mvc:annotation-driven />
		
	
	</beans>


2.3 JSP文件。

	<%@ 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>
	<script type="text/javascript" src="jquery-1.3.2.js">
	</script>
		<script type="text/javascript" src="json2.js">
		</script>
		<script type="text/javascript">
			function userinfo(username,password){
				this.username=username;
				this.password=password;
				}
			function sendAjax(){
				var userinfoRef=new userinfo('高玮','12312');
				var jsonStringRef=JSON.stringify(userinfoRef);
				$.post("getJSONString.spring?t="+new Date().getTime(),{
					jsonString:jsonStringRef
					});
				}
		</script>
	</head>
	<body>
		<input type="button" onclick="sendAjax()" value="登录" >
	</body>
	</html>


2.4GetJSONString.java。

	package com.gaowei.JSON;
	
	import net.sf.json.JSONObject;
	
	import org.springframework.stereotype.Controller;
	import org.springframework.web.bind.annotation.RequestMapping;
	import org.springframework.web.bind.annotation.RequestParam;
	
	@Controller
	public class GetJSONString {
		
		@RequestMapping(value="getJSONString")
		public String getJSONString(@RequestParam("jsonString") String jsonString){
			JSONObject object=JSONObject.fromObject(jsonString);
			System.out.println(object.get("username"));
			System.out.println(object.get("password"));
			return "test.jsp";
		}
	}


2.5效果图。


三、总结

       页面与Contorller层的交互避免要用到JSON传值到后台，这中方法就可以让我们更好的实现界面层与Contorller的交互。

posted @ 2015-01-25 19:54  夏至冬末  阅读(282)  评论(0)  编辑  收藏  举报