我得到以下错误
javax.validation.ValidationException：HV000041：调用 TraversableResolver.isReachable（）引发了异常。在 org.hibernate.validator.internal.engine.ValidatorImpl.isReachable（ValidatorImpl.java:1405） 在
org.hibernate.validator.internal.engine.ValidatorImpl.isValidationRequired（ValidatorImpl.java:1381）
在 org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraint（ValidatorImpl.java:542） 在 org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup（ValidatorImpl.java:487） 在 org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup（ValidatorImpl.java:451） 在 org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext（ValidatorImpl.java:403） 在 org.hibernate.validator.internal.engine.ValidatorImpl.validate（ValidatorImpl.java:206） 在 com.demo.AdminValidator.constraintViolationsForConnMapping（AdminValidator.java:75） 在 com.demo.utils.tests.AdminValidatorTest.test1ConnectionIdIsRequired（AdminValidatorTest.java:121） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57） 在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43） 在java.lang.reflect.Method.invoke（Method.java:606）at org.junit.runners.model.FrameworkMethod $ 1.runReflectiveCall（FrameworkMethod.java:50） 在 org.junit.internal.runners.model.ReflectiveCallable.run（ReflectiveCallable.java:12） 在 org.junit.runners.model.FrameworkMethod.invokeExplosively（FrameworkMethod.java:47） 在 org.junit.internal.runners.statements.InvokeMethod.evaluate（InvokeMethod.java:17） 在 org.junit.internal.runners.statements.RunBefores.evaluate（RunBefores.java:26） 在 org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate（RunBeforeTestMethodCallbacks.java:74） 在 org.junit.internal.runners.statements.RunAfters.evaluate（RunAfters.java:27） 在 org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate（RunAfterTestMethodCallbacks.java:83） 在 org.springframework.test.context.junit4.statements.SpringRepeat.evaluate（SpringRepeat.java:72） 在 org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild（SpringJUnit4ClassRunner.java:231） 在 org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild（SpringJUnit4ClassRunner.java:88） 在org.junit.runners.ParentRunner $ 3.run（ParentRunner.java:290）at at org.junit.runners.ParentRunner $ 1.schedule（ParentRunner.java:71）at at org.junit.runners.ParentRunner.runChildren（ParentRunner.java:288）at at org.junit.runners.ParentRunner.access $ 000（ParentRunner.java:58）at at org.junit.runners.ParentRunner $ 2.evaluate（ParentRunner.java:268）at at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate（RunBeforeTestClassCallbacks.java:61） 在 org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate（RunAfterTestClassCallbacks.java:71） 在org.junit.runners.ParentRunner.run（ParentRunner.java:363）at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run（SpringJUnit4ClassRunner.java:174） 在 org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run（JUnit4TestReference.java:50） 在 org.eclipse.jdt.internal.junit.runner.TestExecution.run（TestExecution.java:38） 在 org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:459） 在 org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:675） 在 org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run（RemoteTestRunner.java:382） 在 org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main（RemoteTestRunner.java:192） 引起：java.lang.NullPointerException at com.dem.model.DeploymentConfigurationMappingPK.hashCode（DeploymentConfigurationMappingPK.java:79） 在 org.hibernate.validator.internal.engine.resolver.CachingTraversableResolverForSingleValidation $ TraversableHolder.buildHashCode（CachingTraversableResolverForSingleValidation.java:153） 在 org.hibernate.validator.internal.engine.resolver.CachingTraversableResolverForSingleValidation $ TraversableHolder。（CachingTraversableResolverForSingleValidation.java:114） 在 org.hibernate.validator.internal.engine.resolver.CachingTraversableResolverForSingleValidation $ TraversableHolder。（CachingTraversableResolverForSingleValidation.java:96） 在 org.hibernate.validator.internal.engine.resolver.CachingTraversableResolverForSingleValidation.isReachable（CachingTraversableResolverForSingleValidation.java:41） 在 org.hibernate.validator.internal.engine.ValidatorImpl.isReachable（ValidatorImpl.java:1396
这是我的代码 ----------------------- Junit ----------- // DeploymentConfigurationMappingPK在construtor中完成的初始化
@Test
public void test1ConnectionIdIsRequired()
{
connectionMappingPK.setConnectionId(null);
List<String> errorMessages=null;
errorMessages=adminValidator.constraintViolationsForDeploymentConfigMapping(connectionMappingPK);
Assert.assertTrue(errorMessages.contains("ConnectionId must be specified."));
}
import java.io.Serializable;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Embeddable;
import javax.persistence.JoinColumn;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
import com.demo.DBConstants;
@Embeddable
public class DeploymentConfigurationMappingPK implements Serializable {
private static final long serialVersionUID = 1L;
@JoinColumn(name = DBConstants.CONNECTION_ID, nullable = false)
@Column(name = DBConstants.CONNECTION_ID, nullable = false, length = 255)
@NotNull(message="ConnectionId must be specified.")
@Size(min=1, max=255)
private String connectionId;
@Basic
@Column(name = DBConstants.APPLICATION_ID, length = 255)
@NotNull(message="ApplicationId must be specified.")
@Size(min=1, max=255)
private String applicationId;
@Basic
@Column(name = DBConstants.APPLICATION_VERSION, length = 10)
@NotNull(message="ApplicationVersion must be specified.")
@Size(min=1, max=10)
private String applicationVersion;
public String getConnectionId() {
return connectionId;
}
public void setConnectionId(String connectionId) {
this.connectionId = connectionId;
}
public String getApplicationId() {
return applicationId;
}
public void setApplicationId(String applicationId) {
this.applicationId = applicationId;
}
public String getApplicationVersion() {
return applicationVersion;
}
public void setApplicationVersion(String applicationVersion) {
this.applicationVersion = applicationVersion;
}
public boolean equals(Object other) {
if (this == other) {
return true;
}
if (!(other instanceof ConnectionMappingPK)) {
return false;
}
ConnectionMappingPK castOther = (ConnectionMappingPK) other;
return this.connectionId.equals(castOther.getConnectionId())
&& this.applicationId.equals(castOther.getApplicationId())
&& this.applicationVersion.equals(castOther
.getApplicationVersion());
}
public int hashCode() {
final int prime = 31;
int hash = 17;
hash = hash * prime + this.connectionId.hashCode();
hash = hash * prime + this.applicationVersion.hashCode();
hash = hash * prime + this.applicationId.hashCode();
return hash;
}
}
----------------------------------------- AdminValidator ----- -------------------------------------------------- --------------------------------------------------
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.Validator;
import javax.validation.ValidatorFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.Demo.persistence.model.DeploymentConfigurationMappingPK ;
public class AdminValidator {
private static final Logger LOG = LoggerFactory
.getLogger(AdminValidator.class);
private ValidatorFactory factory = null;
private Validator validator = null;
public AdminValidator() {
if (factory == null) {
factory = Validation.buildDefaultValidatorFactory();
validator = factory.getValidator();
}
}
public List<String> constraintViolationsForDeploymentConfigMapping(DeploymentConfigurationMappingPK connMapPK) {
if (LOG.isDebugEnabled()) {
LOG.debug("In handler #constraintViolationsDetectedForConnMapping of AdminValidator");
}
List<String> errorMessages = new ArrayList<String>();
**Set<ConstraintViolation<DeploymentConfigurationMappingPK>> constraintViolations = validator**
.validate(connMapPK);
if (constraintViolations.size() > 0)
{
Iterator<ConstraintViolation<DeploymentConfigurationMappingPK>> iterator = constraintViolations
.iterator();
while (iterator.hasNext())
{
ConstraintViolation<DeploymentConfigurationMappingPK> cv = iterator
.next();
errorMessages.add(cv.getMessage());
}
}
return errorMessages;
}
}
---------------- Persistence .xml ---------------------------- ----------
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="com.Demo.persistence"
transaction-type="RESOURCE_LOCAL">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<class>com.Demo.persistence.model.DeploymentConfigurationMappingPK</class>
<shared-cache-mode>ALL</shared-cache-mode>
<properties>
<property name="eclipselink.ddl-generation" value="create-or-extend-tables" />
</properties>
</persistence-unit>
</persistence>
我们在演示项目中使用了eclipselink，springframework，我们没有使用Spring MVC。
答案 0 :(得分：16)
堆栈跟踪显示您的hashcode方法正在抛出NPE：
Caused by: java.lang.NullPointerException at com.dem.model.DeploymentConfigurationMappingPK.hashCode(DeploymentConfigurationMappingPK.java:79) at
您需要修复hashCode方法来处理null。
答案 1 :(得分：0)
似乎与bug HV-1013有关，已在hibernate 5.3.0.CR1中修复。
答案 2 :(得分：0)
对于任何在Websphere 8.5中面临此问题的人。如果您已经有EntityManager实例，请遵循此步骤。我必须使用JPA 2.1，因此启用了Classes loaded with local class loader first (parent last)
如此处所示-Class Loader Setting
我的设置-
Java 7
Hibernate Core : 5.1.17.Final
Hibernate-validator : 4.2.0.Final
TraversableResolver
<script src="https://gist.github.com/abitgen/21bc364944cb52c23b2dfbba9e137133.js"></script>
Validator创建一个TraversableResolver对象，这里我返回一个ConstraintViolation的字符串。
<script src="https://gist.github.com/abitgen/a0c248e68c5b2180ebbc70c1450d10a5.js"></script>
validateEntity方法。这是我的pom.xml
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
<org.hibernate.core>5.1.17.Final</org.hibernate.core>
<org.hibernate.validator>4.2.0.Final</org.hibernate.validator>
</properties>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>${org.hibernate.core}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>${org.hibernate.validator}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator-annotation-processor -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator-annotation-processor</artifactId>
<version>${org.hibernate.validator}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-entitymanager -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>${org.hibernate.core}</version>
</dependency>