今日总结

创建Controller类
然后我们创建一个 Controller，分别返回 User对象、List 和 Map。

import com.itcodai.course02.entity.User;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/json")
public class JsonController {

@RequestMapping("/user")
public User getUser() {
return new User(1, "测试", "123456");
}

@RequestMapping("/list")
public List<User> getUserList() {
List<User> userList = new ArrayList<>();
User user1 = new User(1, "测试", "123456");
User user2 = new User(2, "测试课", "123456");
userList.add(user1);
userList.add(user2);
return userList;
}

@RequestMapping("/map")
public Map<String, Object> getMap() {
Map<String, Object> map = new HashMap<>(3);
User user = new User(1, "测试", "123456");
map.put("作者信息", test);
map.put("博客地址", "https://blog.csdn.net/cuiqwei/article/details/118188540");
map.put("CSDN地址", "http://blog.csdn.net");
map.put("测试数量", 001);
return map;
}
}