javax.validation.ValidationException:HV000183:无法加载'javax.el.ExpressionFactory'
我尝试使用hibernate验证器编写非常简单的应用程序:
我的步骤:
在pom.xml中添加以下依赖项:
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>5.1.1.Final</version>
</dependency>
编写代码:
class Configuration {
Range(min=1,max=100)
int threadNumber;
//...
public static void main(String[] args) {
ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
Validator validator = factory.getValidator();
Configuration configuration = new Configuration();
configuration.threadNumber = 12;
//...
Set<ConstraintViolation<Configuration>> constraintViolations = validator.validate(configuration);
System.out.println(constraintViolations);
}
}
我得到以下stacktrace:
Exception in thread "main" javax.validation.ValidationException: Unable to instantiate Configuration.
at javax.validation.Validation$GenericBootstrapImpl.configure(Validation.java:279)
at javax.validation.Validation.buildDefaultValidatorFactory(Validation.java:110)
...
at org.hibernate.validator.internal.engine.ConfigurationImpl.<init>(ConfigurationImpl.java:110)
at org.hibernate.validator.internal.engine.ConfigurationImpl.<init>(ConfigurationImpl.java:86)
at org.hibernate.validator.HibernateValidator.createGenericConfiguration(HibernateValidator.java:41)
at javax.validation.Validation$GenericBootstrapImpl.configure(Validation.java:276)
... 2 more
我怎么了
-
添加到
pom.xml
以下依赖项后,它可以工作:<dependency> <groupId>javax.el</groupId> <artifactId>javax.el-api</artifactId> <version>2.2.4</version> </dependency> <dependency> <groupId>org.glassfish.web</groupId> <artifactId>javax.el</artifactId> <version>2.2.4</version> </dependency>
Hibernate Validator还需要实现统一表达式语言(JSR
341)来评估约束违例消息中的动态表达式。当您的应用程序在WildFly之类的Java
EE容器中运行时,该容器已经提供了EL实现。但是,在Java SE环境中,必须将实现添加为对POM文件的依赖。例如,您可以添加以下两个依赖项以使用JSR
341 参考实现:<dependency> <groupId>javax.el</groupId> <artifactId>javax.el-api</artifactId> <version>2.2.4</version> </dependency> <dependency> <groupId>org.glassfish.web</groupId> <artifactId>javax.el</artifactId> <version>2.2.4</version> </dependency>