JSON返回数据的几种方式

Java开发难免要使用JSON传递数据，下面是我总结的几种回调方式。

推荐文章：JSON、JSONObject、JSONArray、Map之间的关系

方式一、返回Map集合

//返回Map集合
@RequestMapping("/findStudent")
@ResponseBody
public Map<String, Object> findStudent(MultipartFile file) {

    Student student = new Student();
    student.setUsername("木心");
    student.setPassword("123456");

    Map map = new HashMap<String, Object>();
    map.put("code", 1);
    map.put("msg", "成功");
    map.put("student",student);

    return map;
}

方式二、返回JSON对象

//返回JSONObject对象
@RequestMapping(value = "/findStudent2")
@ResponseBody
public JSONObject findStudent2(String id){

    Student student = new Student();
    student.setUsername("木心");
    student.setPassword("123456");

    JSONObject jsonObject = new JSONObject();
    jsonObject.put("code", 1);
    jsonObject.put("msg", "成功");
    jsonObject.put("student",student);

    return jsonObject;
}

方式三、返回JSON数组

//返回JSON数组
@RequestMapping(value = "/findStudent3")
@ResponseBody
public JSONArray findStudent3(String id){

    Student student = new Student();
    student.setUsername("木心");
    student.setPassword("123456");

    Student student2 = new Student();
    student2.setUsername("小白菜");
    student2.setPassword("1234567");

    JSONArray json = new JSONArray();
    json.add(student);
    json.add(student2);
    return  json;
}