javax.validation.ValidationException：HV000183：无法加载'javax.el.E xpressionFactory'

Question

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>

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

我错了什么？

Answer 1

它是在添加到依赖关系的pom.xml之后工作的：

<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>

Getting started with Hibernate Validator

Answer 2

做的

<dependency>
   <groupId>javax.el</groupId>
   <artifactId>javax.el-api</artifactId>
   <version>2.2.4</version>
</dependency>

Answer 3

如果您使用tomcat作为服务器运行时并且在测试中遇到此错误（因为测试期间tomcat运行时不可用），那么包含tomcat el运行时而不是glassfish中的运行时是有意义的。这将是：

    <dependency>
        <groupId>org.apache.tomcat</groupId>
        <artifactId>tomcat-el-api</artifactId>
        <version>8.5.14</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.apache.tomcat</groupId>
        <artifactId>tomcat-jasper-el</artifactId>
        <version>8.5.14</version>
        <scope>test</scope>
    </dependency>

Answer 4

关于Hibernate validator documentation page，你必须定义对JSR-341实现的依赖：

<dependency>
   <groupId>org.glassfish</groupId>
   <artifactId>javax.el</artifactId>
   <version>3.0.1-b11</version>
</dependency>

Answer 5

如果你使用带启动器的spring boot - 这个依赖项会添加tomcat-embed-el和hibernate-validator依赖项：

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

Answer 6

如果您不需要javax.el（例如在JavaSE应用程序中），请使用ParameterMessageInterpolator中的Hibernate validator。 Hibernate验证器是一个独立的组件，可以在没有Hibernate本身的情况下使用。

依赖于hibernate-validator

<dependency>
   <groupId>org.hibernate</groupId>
   <artifactId>hibernate-validator</artifactId>
   <version>6.0.16.Final</version>
</dependency>

使用ParameterMessageInterpolator

import javax.validation.Validation;
import javax.validation.Validator;
import org.hibernate.validator.messageinterpolation.ParameterMessageInterpolator;

private static final Validator VALIDATOR =
  Validation.byDefaultProvider()
    .configure()
    .messageInterpolator(new ParameterMessageInterpolator())
    .buildValidatorFactory()
    .getValidator();

Answer 7

如果使用Spring Boot，效果很好。即使有Spring Reactive Mongo。

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

和验证配置：

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.mongodb.core.mapping.event.ValidatingMongoEventListener;
import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;

@Configuration
public class MongoValidationConfig {

    @Bean
    public ValidatingMongoEventListener validatingMongoEventListener() {
        return new ValidatingMongoEventListener(validator());
    }

    @Bean
    public LocalValidatorFactoryBean validator() {
        return new LocalValidatorFactoryBean();
    }
}

Answer 8

为gradle：

compile 'javax.el:javax.el-api:2.2.4'