java spring boot返回json的写法详解编程语言

package com.example.demo2122; 
import org.springframework.web.bind.annotation.GetMapping; 
import org.springframework.web.bind.annotation.RequestParam; 
import org.springframework.web.bind.annotation.RestController; 
 
import java.util.*; 
@RestController 
public class HelloControl { 
    @RequestMapping("/hello") 
    public Map<Object, Object> hello(@RequestParam(value = "name", defaultValue = "World") String name) { 
        List<Map<Object, Object>> list = new ArrayList<Map<Object, Object>>(); 
        Map<Object, Object> map1 = new HashMap<Object, Object>(); 
        map1.put("姓名1", "张三"); 
        map1.put("姓名2", "李四"); 
        map1.put("姓名3", "王五"); 
        list.add(map1); 
 
        Map<Object, Object> map=this.commonajax(100,"查询成功",list); 
 
 
        return map; 
    } 
 
    private Map<Object, Object> commonajax(Integer code,String msg,List<Map<Object, Object>> data){ 
        Map<Object, Object> map = new HashMap<Object, Object>(); 
        map.put("code", code); 
        map.put("msg", "查询成功"); 
        map.put("data", data); 
        return map; 
    } 
}