java - 如何使用@putmapping编写put方法

Question

我正在学习 Spring Rest api，并编写了以下方法将数据保存到数据库中。

@GetMapping(path="/add") // Map ONLY GET Requests
public @ResponseBody String addNewUser (@RequestParam String name
        , @RequestParam String email) {
    // @ResponseBody means the returned String is the response, not a view name
    // @RequestParam means it is a parameter from the GET or POST request

    User n = new User();
    n.setName(name);
    n.setEmail(email);
    userRepository.save(n);
    return "Saved";
}

现在我想编写 put 查询，它可以获取用户 ID，然后更新名称或电子邮件。另外，我需要检查用户名和电子邮件不应为空，并且电子邮件的格式是否有效。

我如何使用@putmapping构建我的方法来执行我的任务。

Answer 1

基本验证应仅在映射类中完成。

您可以引用以下示例:

假设您的映射类和请求方法如下:

import javax.validation.constraints.Max;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
import javax.validation.constraints.Email;

 public class User {

    @NotNull(message = "Name cannot be null")
    private String name;

    @Size(min = 10, max = 200, message 
      = "About Me must be between 10 and 200 characters")
    private String aboutMe;

    @Min(value = 18, message = "Age should not be less than 18")
    @Max(value = 150, message = "Age should not be greater than 150")
    private int age;

    @Email(message = "Email should be valid")
    @NotNull
    private String email;

    // setters and getters 
}

@PutMapping(path="/update")
public ResponseEntity<UserResponse> updateUser(@Valid @RequestBody User user) {
    return userRepository.save(user);
}