Java 为什么spring验证器不能在这个Api中工作？

我已经编写了一个学生数据的基本简单API，并使用Hibernate validator添加了一些验证，但每次都返回0个错误

org.springframework.validation.BeanPropertyBindingResult: 0 errors

代码如下：

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.4.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>16</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
<dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>7.0.1.Final</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.validation/validation-api -->
        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>2.0.1.Final</version>
        </dependency>
         

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

Controller.java

package com.example.demo;

import javax.validation.Valid;

import org.springframework.validation.BindingResult;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
@Validated
@RestController("/")
public class Controller {

    
    @PostMapping("student")
    public String getstudent(@Valid @RequestBody student stu,BindingResult result )
    {
    
        System.out.println(result);
        
        return "hello";
    }
}

我正在使用我的请求主体postman进行测试：

{
    "name":"himu",
    "semester":"7"
}


{
    "name":"",
    "semester":"7"
}

在每个请求中，即使名称为空，也会返回0个错误

org.springframework.validation.BeanPropertyBindingResult: 0 errors

---

有人能帮忙吗？提前谢谢。

您能用这个更改pom.xml中的javax依赖项并重试吗

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-validation</artifactId>
  <version>2.4.0</version>
</dependency>

org.springframework.boot
弹簧启动启动器验证
2.4.0

您需要添加初学者验证依赖项。然后SpringBootAuto配置将从类路径中选择与验证相关的配置

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-validation</artifactId>
    </dependency>

org.springframework.boot
弹簧启动启动器验证

仍然是相同的错误。我需要删除javax验证依赖项吗？请尝试删除hibernate validator、验证api和添加spring boot starter验证？尝试过了，现在它返回验证错误，即使参数正确并抛出ConstraintViolationException。有趣！我猜您还需要添加getter/setter，如下所示

公共类学生{@NotBlank（message=“hey”）私有字符串名称；@NotBlank（message=“hey”）私有字符串学期；公共字符串getName（）{return name；}公共void setName（字符串名称）{this.name=name；}public String getSerment（）{return serm；}public void setSemester（String serment）{this.serm=serm；}}

不工作，仍然是相同的错误