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

来源：互联网发布：java微信公众平台框架编辑：程序博客网时间：2024/06/08 15:40

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;@Controllerpublic 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。

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