我正在尝试使用javax.validation验证某些DTO,但似乎@NotEmpty注释未检查参数是否为null。
这是我的案例:
人类
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 + "]";
}
}
工作班
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 + "]";
}
}
当我尝试通过以下JUnit testS时,我会失败:
@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);
}
这是验证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首先检查参数是否为null,这是错的吗?
PD:这是我使用的依赖项:
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>2.0.1.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate.validator</groupId>
<artifactId>hibernate-validator</artifactId>
<version>6.1.0.Alpha5</version>
</dependency>
<dependency>
<groupId>org.hibernate.validator</groupId>
<artifactId>hibernate-validator-annotation-processor</artifactId>
<version>6.1.0.Alpha5</version>
</dependency>
<dependency>
<groupId>javax.el</groupId>
<artifactId>javax.el-api</artifactId>
<version>3.0.1-b06</version>
</dependency>
<dependency>
<groupId>org.glassfish.web</groupId>
<artifactId>javax.el</artifactId>
<version>2.2.6</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
似乎问题出在依赖项上,由于某种原因,在类路径中,validation-api的jar版本是错误的,我只是删除了类路径中的所有jar,然后再次添加它们,错误消失了。
最佳答案
@NotEmpty内部检查最小大小为1和null。@ NotEmpty的文档中明确提到:"Asserts that the annotated string, collection, map or array is not {@code null} or empty."
关于java - 注释@NotEmpty不检查String是否为null,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/57075273/