菜鸟学习Spring——SpringMVC注解版解析不同格式的JSON串

一、概述

不同格式的JSON串传到后台来实现功能这个是我们经常要做的一件事，本篇博客就给大家介绍四种不同的JSON串传到后台后台如何用@RequestBody解析这些不同格式的JSON串的。

二、代码展示

需要引用的jar包

1.xml配置 Web.xml

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

<web-app version="2.5" 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_2_5.xsd">

    <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>

springMVC-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.Java代码 Userinfo.java

package com.gaowei.entity;



public class Userinfo {

    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 setPassword(String password) {

        this.password = password;

    }

}

Test.java

package com.gaowei.JSON;



import java.util.ArrayList;

import java.util.List;

import java.util.Map;



import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestBody;

import org.springframework.web.bind.annotation.RequestMapping;



import com.gaowei.entity.Userinfo;



@Controller

public class Test {



    @RequestMapping(value="getJSON1")

    public void getJSON1(@RequestBody Userinfo userinfo){

        System.out.println("------getJSON1---start----");

        System.out.println(userinfo.getUsername());

        System.out.println(userinfo.getPassword());

        System.out.println("------getJSON1---end----");

    }



    @RequestMapping(value="getJSON2")

    public void getJSON2(@RequestBody ArrayList<String> list){

        System.out.println("------getJSON2---start----");

        for (int i = 0; i < list.size(); i++) {

            System.out.println(list.get(i));

        }

        System.out.println("------getJSON2---end----");

    }



    @RequestMapping(value="getJSON3")

    public void getJSON3(@RequestBody List<Map> list){

        System.out.println("------getJSON3---start----");

        for (int i = 0; i < list.size(); i++) {

            Map map=list.get(i);

            System.out.println(map.get("username")+" "+map.get("password"));

        }

        System.out.println("------getJSON3---end----");

    }



    @RequestMapping(value="getJSON4")

    public void getJSON4(@RequestBody Map map){

        System.out.println("------getJSON4---start----");

        System.out.println(map.get("username"));

        List<Map> workList=(List)map.get("work");

        for (int i = 0; i < workList.size(); i++) {

            Map eachAddressMap=workList.get(i);

            System.out.println("address="+eachAddressMap.get("address"));

        }

        Map schoolMap=(Map)map.get("school");

        System.out.println(schoolMap.get("name"));

        System.out.println(schoolMap.get("address"));

        System.out.println("------getJSON4---end----");

    }

}

3.界面代码 Test.jsp

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

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

<html>

    <head>

        <script src="jquery-1.3.2.js">

        </script>

        <script src="json2.js">

        </script>

        <script>

            function userinfo(username, password){

                this.username = username;

                this.password = password;

            }



            function sendAjax1(){

                var userinfoRef = new userinfo('中国', '中国人');

                var jsonStringRef = JSON.stringify(userinfoRef);

                $.ajax({

                    type: "POST",

                    data: jsonStringRef,

                    url: "getJSON1.spring?t=" + new Date().getTime(),

                    contentType: "application/json"

                });

            }



            function sendAjax2(){

                var myArray =new Array();

                myArray[0]="中国1";

                myArray[1]="中国2";

                myArray[2]="中国3";

                myArray[3]="中国4";

                var jsonString=JSON.stringify(myArray);

                  $.ajax({

                        type: "POST",

                        data: jsonString,

                        url: "getJSON2.spring?t=" + new Date().getTime(),

                        contentType: "application/json"

                    });

                }





            function sendAjax3(){

                    var myArray=new Array();

                    myArray[0]= new userinfo('中国1', '中国人1');

                    myArray[1]= new userinfo('中国2', '中国人2');

                    myArray[2]= new userinfo('中国3', '中国人3');

                    myArray[3]= new userinfo('中国4', '中国人4');

                    var jsonString=JSON.stringify(myArray);

                      $.ajax({

                            type: "POST",

                            data: jsonString,

                            url: "getJSON3.spring?t=" + new Date().getTime(),

                            contentType: "application/json"

                        });

                }



            function sendAjax4(){

                var jsonObject={

                    "username":"accp",

                    "work":[{

                        "address":"address1"

                        },{

                        "address":"address2"

                            }],

                        "school":{

                            "name":"tc",

                            "address":"pjy"

                            }

                        }

                var jsonString=JSON.stringify(jsonObject);

                  $.ajax({

                        type: "POST",

                        data: jsonString,

                        url: "getJSON4.spring?t=" + new Date().getTime(),

                        contentType: "application/json"

                    });

            }

        </script>

    </head>

    <body>

        <input type="button" onclick="sendAjax1()" value="sendAjax1"/>

        <br/>

        <input type="button" onclick="sendAjax2()" value="sendAjax2">

        <br/>

        <input type="button" onclick="sendAjax3()" value="sendAjax3">

        <br/>

        <input type="button" onclick="sendAjax4()" value="sendAjax4">

        <br/>

    </body>

</html>

4.效果图

三、总结。

这里要注意jar包的引用不要把spring的所有jar包都引用了会引起jar包冲突而导致报HTTP 415的错误。@RequestBody这个方法很强大可以把JSON串转化为实体类、ArryList、Map等对象。这样的方法让我们开发人员开发效率大大的提高了

菜鸟学习Spring——SpringMVC注解版解析不同格式的JSON串

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