SpringMVC的JSON实现

短命女 2022-09-24 14:23 123阅读 0赞

1.首先我们需要在pom.xml中引入使用JSON所需要的相关依赖

<dependency>
    			<groupId>com.fasterxml.jackson.core</groupId>
    			<artifactId>jackson-databind</artifactId>
    			<version>2.8.1</version>
    		</dependency>
    
    		<dependency>
    			<groupId>org.codehaus.jackson</groupId>
    			<artifactId>jackson-mapper-asl</artifactId>
    			<version>1.9.13</version>
    		</dependency>

2.本次测试使用了JQuery所以须在springmvc.xml加入配置，以访问到静态资源

<mvc:annotation-driven />
    	
    	<mvc:default-servlet-handler />

3.编写发送请求的视图

<%@ page contentType="text/html; charset=utf-8"
        pageEncoding="utf-8"%>
    <!DOCTYPE html >
    <html>
    <head>
    <meta charset="utf-8">
    <title>JSONTest</title>
    <script type="text/javascript" src="js/jquery-2.1.1.js"></script>
    <script type="text/javascript">
    	function myTest(){
    		var obj=$("#subject");
    		var opt;
    		$.post("mvc/json",function(data){
    			
    			console.info(data.string);
    			
    			$.each(data.list,function(index,item){
    				opt='<option>'+item+'</option>';
    				obj.append($(opt));
    			});
    		});
    	}
    </script>
    </head>
    <body>
    	<a οnclick="myTest()">JSONTest</a>
    	<div>
    		<select id="subject">
    		</select>
    	</div>
    </body>
    </html>

4.编写请求处理类，注意须在请求处理方法前加上@ResponseBody

package com.yc.controllers;
    
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.ResponseBody;
    
    @Controller //标识为请求处理类
    @RequestMapping("mvc") //拦截/mvc的请求
    public class HelloController {
    	
    	@ResponseBody
    	@RequestMapping("/json")
    	public Map<String,Object> jsonTest(){
    		Map<String,Object> map=new HashMap<String, Object>();
    		List<String> list=new ArrayList<String>();
    		
    		for (int i=0; i<5; i++) {
    			list.add("aa"+i);
    		}
    		
    		map.put("string", "字符串");
    		map.put("list", list);
    		return map;
    	}
    }

5.测试结果

![Center][]

我们来发送请求走一波，点击JSONTest，看运行结果

![Center 1][]

OK，到这里我们就完成了SpringMVC的JSON实现，关于SpringMVC的基本配置大家可以看我的另一篇博客“[SpringMVC的HelloWorld实现][SpringMVC_HelloWorld]”

[Center]: /images/20220719/3af5379c91a949efb51e96f540bc1498.png
[Center 1]: /images/20220719/b8addc92c4404a3fa7132a1989efb243.png
[SpringMVC_HelloWorld]: http://blog.csdn.net/qq_26624661/article/details/52086850