我在网上关注了多个帖子，比如https://www.javatpoint.com/restful-web-services-validationshttps://reflectoring.io/bean-validation-with-spring-boot/等等。
到处都写着，只要在@RequestBody前面添加@Valid就可以检查输入的有效性。但对我来说，它总是返回状态码为200，尽管使用JUnit测试用例，我能够验证所有的限制。
我也关注了像Spring Boot Validations with annotations这样的帖子，并添加了BindingResult作为第二个参数，仍然是相同的行为，bindingResult对象显示0错误。
详情如下：
DTO类：

package practice.corejava.validators.dto;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import jakarta.validation.constraints.NotBlank;
import jakarta.validation.constraints.NotNull;
import jakarta.validation.constraints.Positive;

@Data
@NoArgsConstructor
@AllArgsConstructor
public class UserData {

    @NotBlank(message = "Name should not be blank")
    private String name;

    @NotNull(message = "Age should not be null")
    @Positive(message = "Age should be positive")
    private Integer age;

}

控制器类别：（总是通过 Postman 返回201）

package practice.corejava.validators.controller;

import practice.corejava.validators.dto.UserData;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.support.ServletUriComponentsBuilder;

import jakarta.validation.Valid;

import java.net.URI;

@RestController
@RequestMapping("api/v1/validations")
public class ValidationsController {

    @PostMapping(value = "/user-data", consumes = MediaType.APPLICATION_JSON_VALUE)
    public ResponseEntity<UserData> createUserData(@Valid @RequestBody UserData userData) {
        URI location = ServletUriComponentsBuilder.fromCurrentRequest().path("/{name}").buildAndExpand(userData.getName()).toUri();
        return ResponseEntity.created(location).build();
    }

}

JUnit测试类：（测试用例正在成功）

package practice.corejava.validators.dto;

import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;

import jakarta.validation.ConstraintViolation;
import jakarta.validation.Validation;
import jakarta.validation.Validator;
import jakarta.validation.ValidatorFactory;
import java.util.Set;

import static org.junit.jupiter.api.Assertions.assertEquals;

public class UserDataTest {

    private static Validator validator;

    @BeforeAll
    public static void setUp() {
        try (ValidatorFactory factory = Validation.buildDefaultValidatorFactory()) {
            validator = factory.getValidator();
        }
    }

    @Test
    void all_validation_success() {
        UserData userData = new UserData("SomeName", 30);
        Set<ConstraintViolation<UserData>> constraintViolations = validator.validate(userData);
        assertEquals(0, constraintViolations.size());
    }

    @Test
    void name_blank() {
        UserData userData = new UserData("", 30);
        Set<ConstraintViolation<UserData>> constraintViolations = validator.validate(userData);
        assertEquals(1, constraintViolations.size());
        assertEquals("Name should not be blank", constraintViolations.iterator().next().getMessage());
    }

}

Postman 请求正文：预期为400，但201作为状态代码出现

{
    "name" : null,
    "age" : 30
}

请参阅下面的“权限和版本”详细信息：

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>3.1.3</version>
    <relativePath/>
</parent>

<properties>
    <java.version>17</java.version>
</properties>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-validation</artifactId>
</dependency>
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <scope>provided</scope>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>jakarta.validation</groupId>
    <artifactId>jakarta.validation-api</artifactId>
    <version>3.0.2</version>
</dependency>