菜鸟学习Spring——SpringMVC注解版解析不同格式的JSON串 GOOD

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

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<?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

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<?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

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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

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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

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<%@ 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