springmvc转换json数据

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1接受JSON格式数据：

<%@ page language="java" contentType="text/html; charset=UTF-8"         pageEncoding="UTF-8"%><!DOCTYPE html><html><head>    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">    <title>测试接收JSON格式的数据</title>    <%--<link rel="stylesheet" href="${pageContext.request.contextPath}/js/json2.js" />--%>    <script type="text/javascript" src="../js/json2.js"></script>    <script src="http://libs.baidu.com/jquery/1.9.1/jquery.min.js"></script>    <script type="text/javascript">        $(document).ready(function(){            testRequestBody();        });        function testRequestBody(){            $.ajax("${pageContext.request.contextPath}/json/testRequestBody",// 发送请求的URL字符串。                {                    dataType : "json", // 预期服务器返回的数据类型。                    type : "post", //  请求方式 POST或GET                    contentType:"application/json", //  发送信息至服务器时的内容编码类型 ，表示发送的内容是json类型                    // 发送到服务器的数据。                    data:JSON.stringify({id : 1, name : "spring",author:"jkf"}),                    async:  true , // 默认设置下，所有请求均为异步请求。如果设置为false，则发送同步请求                    // 请求成功后的回调函数。                    success :function(data){                        console.log(data);                        $("#id").html(data.id);                        $("#name").html(data.name);                        $("#author").html(data.author);                    },                    // 请求出错时调用的函数                    error:function(){                        alert("数据发送失败");                    }                });        }    </script></head><body>编号：<span id="id"></span><br>书名：<span id="name"></span><br>作者：<span id="author"></span><br></body></html>

package controller;import com.alibaba.fastjson.JSONObject;import com.fasterxml.jackson.databind.ObjectMapper;import com.fasterxml.jackson.databind.util.JSONPObject;import model.Book;import model.Car;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestBody;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.ResponseBody;import javax.servlet.http.HttpServletResponse;import java.util.ArrayList;import java.util.List;import java.util.logging.Logger;@Controller@RequestMapping("/json")public class BookController {    @RequestMapping("/testRequestBody")    public void setJosn(@RequestBody Book book, HttpServletResponse response) throws Exception{        String s = JSONObject.toJSONString(book);//fastjson接受json数据        response.setContentType("text/html;charset=UTF-8");        response.getWriter().println(JSONObject.toJSONString(book));    }  }

2.返回JSON格式的数据

<%--  Created by IntelliJ IDEA.  User: Administrator  Date: 2017/12/18 0018  Time: 10:40  To change this template use File | Settings | File Templates.--%><%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head>    <title>测试返回Json格式的数据</title>    <script type="text/javascript" src="/js/json2.js"></script>    <script src="http://libs.baidu.com/jquery/1.9.1/jquery.min.js"></script>    <script type="text/javascript">        $(document).ready(function(){            testResponseBody();        });        function testResponseBody(){            $.post("${packContext.request.contextPath}/json/testResponseBody",null,function(data){ //发送请求到具体的控制器，@ResponseBody返回一个json数据                $.each(data,function(){                    var tr = $("<tr align='center'/>")                    $("<td/>").html(this.id).appendTo(tr);                    $("<td/>").html(this.name).appendTo(tr);                    $("<td/>").html(this.author).appendTo(tr);                    $("#booktable").append(tr);                })            },"json")        }    </script></head><body><table id="booktable" border="1" style="border-collapse: collapse">    <tr align="center">        <th>编号</th>        <th>书名</th>        <th>作者</th>    </tr></table></body></html>

package controller;import com.alibaba.fastjson.JSONObject;import com.fasterxml.jackson.databind.ObjectMapper;import com.fasterxml.jackson.databind.util.JSONPObject;import model.Book;import model.Car;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestBody;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.ResponseBody;import javax.servlet.http.HttpServletResponse;import java.util.ArrayList;import java.util.List;import java.util.logging.Logger;@Controller@RequestMapping("/json")public class BookController {    @RequestMapping("/testResponseBody")    public @ResponseBody Object getJson(){        List<Book> books = new ArrayList<Book>();        books.add(new Book("1","spring+mybatis企业应用实战","肖吉文"));        books.add(new Book("2","Java疯狂讲义","李刚"));        return books;    }}

json需要的pom.xml

  <dependency>      <groupId>com.alibaba</groupId>      <artifactId>fastjson</artifactId>      <version>1.2.39</version>    </dependency>

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