我正在嘗試使用 javax.validation 驗證一些 DTO，但似乎注釋 @NotEmpty 不檢查參數是否為 null。這是我的課程：人物類public class Person {    @NotEmpty(message = "mandatoryParametersMissing")    private String name;    @NotNull(message = "mandatoryParametersMissing")    @Valid    private Job job;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public Job getJob() {        return job;    }    public void setJob(Job job) {        this.job = job;    }    @Override    public String toString() {        return "Person [name=" + name + ", job=" + job + "]";    }}工作類public class Job {    @NotEmpty(message = "mandatoryParametersMissing")    private String name;    @NotNull(message = "mandatoryParametersMissing")    private Integer salary;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public Integer getSalary() {        return salary;    }    public void setSalary(Integer salary) {        this.salary = salary;    }    @Override    public String toString() {        return "Job [name=" + name + ", salary=" + salary + "]";    }}當我嘗試通過以下 JUnit 測試時，我失敗了：@Test(expected = BusinessServiceException.class)    public void testJobNameNull() {        Person samuel = new Person();        samuel.setName("Samuel Antequera");        Job programmer = new Job();        programmer.setSalary(18000);        samuel.setJob(programmer);        validatePerson(samuel);    }這是驗證 DTO 的方法：public void validatePerson(Person in) {    ValidatorFactory factory = Validation.buildDefaultValidatorFactory();    Validator validator = factory.getValidator();    Set<ConstraintViolation<Person>> violations = validator.validate(in);    for (ConstraintViolation<Person> violation : violations) {        throw new BusinessServiceException(violation.getMessage(), violation.getPropertyPath().toString());    }}我的印象是 @NotEmpty 首先檢查參數是否為 null，我錯了嗎？