一、json处理方法有两种

　　　　1：导入Spring需要json的jar包。（本例使用）

　　　　　　　　使用@ResponseBody该注解用于将Controller的方法返回的对象，通过HttpMessageConverter接口转换为指定格式的数据如：json,xml等，通过　　　　　　　　　Response响应给客户端　　

　　　 2：springmvc.xml中配置转换json的配置。

二、案例一：使用@ResponseBody

　　　依赖的包

    <dependency>

            <groupId>com.fasterxml.jackson.core</groupId>

            <artifactId>jackson-core</artifactId>

            <version>2.5.1</version>

        </dependency>

        <dependency>

            <groupId>com.fasterxml.jackson.core</groupId>

            <artifactId>jackson-databind</artifactId>

            <version>2.5.1</version>

        </dependency>

        <dependency>

            <groupId>com.fasterxml.jackson.core</groupId>

            <artifactId>jackson-annotations</artifactId>

            <version>2.5.1</version>

        </dependency>

index.jsp

<script type="text/javascript" src="<%=request.getContextPath()%>/script/jquery-1.7.2.min.js"></script>

<script type="text/javascript" src="<%=request.getContextPath()%>/script/jquery.json-2.4.js"></script>

<script type="text/javascript" src="<%=request.getContextPath()%>/script/jquery.form.js"></script>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>Insert title here</title>

<script type="text/javascript">

function ajax_json_1(){

    var getURL = "<%=request.getContextPath()%>/jsonController/dogList?date="+new Date()+"";

    jQuery.get(getURL,function(jsonList){

        for(var i = 0;i<jsonList.length;i++){

            var dogBean = jsonList[i];

            window.alert(dogBean.dogid);

        }

    },"json");

}

</script>

</head>

<body>

    <a href="javascript:void(0);" onclick="ajax_json_1();">jQuery来访问_SpringMVC返回json对象</a>

</body>

controller

package com.shyroke.controller;

import java.util.ArrayList;

import java.util.List;

import org.springframework.stereotype.Controller;

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

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

import com.shyroke.bean.DogBean;

@Controller

@RequestMapping(value="/jsonController")

public class JsonController {

    @RequestMapping(value="/dogList")

    @ResponseBody

    public List<DogBean> getListDog(){

        List<DogBean> dogList=new ArrayList<DogBean>();

        DogBean dog1=new DogBean();

        dog1.setDogid("1");

        dog1.setDogname("dog1");

        DogBean dog2=new DogBean();

        dog2.setDogid("2");

        dog2.setDogname("dog2");

        dogList.add(dog1);

        dogList.add(dog2);

        return dogList;

    }

}

三、案例二：服务端使用原始的方式返回json数据，方法不需要有返回值

同样需要引入上例的包

<script type="text/javascript" src="<%=request.getContextPath()%>/script/jquery-1.7.2.min.js"></script>

<script type="text/javascript" src="<%=request.getContextPath()%>/script/jquery.json-2.4.js"></script>

<script type="text/javascript" src="<%=request.getContextPath()%>/script/jquery.form.js"></script>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>Insert title here</title>

<script type="text/javascript">function ajax_json_2(){

    var getURL = "<%=request.getContextPath()%>/jsonController/dogBean?date="+new Date()+"";

    jQuery.get(getURL,function(jsonObj){

        window.alert(jsonObj.dogid + "\t\t" + jsonObj.dogname);

    },"json");

}

</script>

</head>

<body>

    <a href="javascript:void(0);" onclick="ajax_json_2();">jQuery来访问_原始返回json对象</a>

</body>

controller

package com.shyroke.controller;

import java.io.PrintWriter;

import java.util.ArrayList;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;

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

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

import com.fasterxml.jackson.annotation.JsonInclude.Include;

import com.fasterxml.jackson.databind.ObjectMapper;

import com.fasterxml.jackson.databind.SerializationFeature;

import com.shyroke.bean.DogBean;

@Controller

@RequestMapping(value="/jsonController")

public class JsonController {

    @RequestMapping(value="dogBean")

    public void GetDog(HttpServletRequest request,HttpServletResponse response) throws Exception{

        PrintWriter out=response.getWriter();

        DogBean dog1=new DogBean();

        dog1.setDogid("1");

        dog1.setDogname("dog1");

        /**

         * 转成json字符串。

         */

        ObjectMapper objectMapper = new ObjectMapper();

        objectMapper.configure(SerializationFeature.INDENT_OUTPUT, true);

        // 配置mapper忽略空属性

        objectMapper.setSerializationInclusion(Include.NON_EMPTY);

        String jsonStr = objectMapper.writeValueAsString(dog1);

        out.print(jsonStr);

        out.flush();

        out.close();

    }

}

巴特西

（九）springmvc之json的处理（服务端发送json数据到客户端）

一、json处理方法有两种

1：导入Spring需要json的jar包。（本例使用）

2：springmvc.xml中配置转换json的配置。

二、案例一：使用@ResponseBody

依赖的包

三、案例二：服务端使用原始的方式返回json数据，方法不需要有返回值

同样需要引入上例的包

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