json - 如何在 JSON 对象 Spring Boot 中使用 @produces

Question

是否可以在 Spring Boot 中将 @produces 用于 JSON 对象？或者还有其他方法可以实现:

JSONObject J_Session = new JSONObject();
J_Session.put("SESSION_ID_J", session_jid);
J_Session.put("J_APP", "J");
J_Session.put("REST_ID_J", rest_id);

Answer 1

这是一个简单的例子:

RestController class:


import java.util.ArrayList;
import java.util.List;

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

import com.websystique.springboot.model.User;

@RestController
@RequestMapping("/api")
public class RestApiController {

    @RequestMapping(value = "/user/", method = RequestMethod.GET, produces = { "application/json" })
    public List<User> listAllUsers() {
        List<User> users = new ArrayList<User>();
        users.add(new User(1, "Sam", 30, 70000));
        users.add(new User(2, "Tom", 40, 50000));
        users.add(new User(3, "Jerome", 45, 30000));
        users.add(new User(4, "Silvia", 50, 40000));
        return users;
    }
}

属性produces = { "application/json"}自动将List集合转化为json响应。

下面是 POJO 类。

User Pojo class


public class User {

    private long id;

    private String name;

    private int age;

    private double salary;

    public User(){
    }

    public User(long id, String name, int age, double salary){
        this.id = id;
        this.name = name;
        this.age = age;
        this.salary = salary;
    }
}

示例 JSON 响应:

[
   {
      "id":1,
      "name":"Sam",
      "age":30,
      "salary":70000
   },
   {
      "id":2,
      "name":"Tom",
      "age":40,
      "salary":50000
   },
   {
      "id":3,
      "name":"Jerome",
      "age":45,
      "salary":30000
   },
   {
      "id":4,
      "name":"Silvia",
      "age":50,
      "salary":40000
   }
]

关注 link有关 CRUD 操作的完整详细示例。

以上代码来自这个链接本身，我只是修改了 Controller 部分以使其简单。