我创建了一个动态网络项目，并在我的日食火星中添加了JPA方面。 在我的构建路径中，我有：jdk8，EclipseLink 2.6，JPA 2.1，Tomcat 8，Oracle瘦驱动程序（ojdbc14.jar）;
有一个奇怪的问题，因为同一个项目在某些机器上有效但在其他机器上不起作用。
出于此目的，我认为tomcat不是必需的，因为我只想在一个简单的jpa项目中从实体生成表。
我已经创建了两个jpa实体，并且我已将persistence.xml设置为指向我的Oracle数据库（Ping成功）：
persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="question" transaction-type="RESOURCE_LOCAL">
<class>it.corsojava.question.domain.Student</class>
<class>it.corsojava.question.domain.Question</class>
<properties>
<property name="javax.persistence.jdbc.url" value="jdbc:oracle:thin:@192.168.14.111:1521:ORCL"/>
<property name="javax.persistence.jdbc.user" value="fede"/>
<property name="javax.persistence.jdbc.password" value="fede"/>
<property name="javax.persistence.jdbc.driver" value="oracle.jdbc.OracleDriver"/>
<property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
<property name="javax.persistence.schema-generation.database.action" value="drop-and-create"/>
<property name="javax.persistence.schema-generation.scripts.action" value="drop-and-create"/>
<property name="eclipselink.jdbc.bind-parameters" value="false"/>
<property name="eclipselink.jdbc.exclusive-connection.is-lazy" value="true"/>
<property name="eclipselink.jdbc.exclusive-connection.mode" value="Transactional"/>
<property name="eclipselink.jdbc.batch-writing" value="Oracle-JDBC"/>
</properties>
</persistence-unit>
</persistence>
Question.java 包it.corsojava.question.domain;
import java.io.Serializable;
import java.lang.Long;
import java.lang.String;
import javax.persistence.*;
/**
* Entity implementation class for Entity: Question
*
*/
@Entity
public class Question implements Serializable {
@Id @GeneratedValue(strategy=GenerationType.IDENTITY)
private Long id;
private String text;
private static final long serialVersionUID = 1L;
public Question() {
super();
}
public Long getId() {
return this.id;
}
public void setId(Long id) {
this.id = id;
}
public String getText() {
return this.text;
}
public void setText(String text) {
this.text = text;
}
}
Student.java
package it.corsojava.question.domain;
import java.io.Serializable;
import java.lang.Long;
import java.lang.String;
import javax.persistence.*;
/**
* Entity implementation class for Entity: Student
*
*/
@Entity
public class Student implements Serializable {
@Id @GeneratedValue(strategy=GenerationType.IDENTITY)
private Long id;
private String name;
private String username;
private String password;
private String email;
private static final long serialVersionUID = 1L;
public Student() {
super();
}
public Long getId() {
return this.id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
public String getUsername() {
return this.username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return this.password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return this.email;
}
public void setEmail(String email) {
this.email = email;
}
}
不幸的是，当我运行JPA工具＆gt;从实体创建表时......我收到以下错误：
[EL Fine]: server: Configured server platform: org.eclipse.persistence.platform.server.NoServerPlatform
[EL Config]: metadata: The access type for the persistent class [class it.corsojava.question.domain.Question] is set to [FIELD].
[EL Config]: metadata: The access type for the persistent class [class it.corsojava.question.domain.Student] is set to [FIELD].
[EL Config]: metadata: The alias name for the entity class [class it.corsojava.question.domain.Question] is being defaulted to: Question.
[EL Config]: metadata: The table name for entity [class it.corsojava.question.domain.Question] is being defaulted to: QUESTION.
[EL Config]: metadata: The column name for element [id] is being defaulted to: ID.
[EL Config]: metadata: The column name for element [text] is being defaulted to: TEXT.
[EL Config]: metadata: The alias name for the entity class [class it.corsojava.question.domain.Student] is being defaulted to: Student.
[EL Config]: metadata: The table name for entity [class it.corsojava.question.domain.Student] is being defaulted to: STUDENT.
[EL Config]: metadata: The column name for element [password] is being defaulted to: PASSWORD.
[EL Config]: metadata: The column name for element [name] is being defaulted to: NAME.
[EL Config]: metadata: The column name for element [id] is being defaulted to: ID.
[EL Config]: metadata: The column name for element [email] is being defaulted to: EMAIL.
[EL Config]: metadata: The column name for element [username] is being defaulted to: USERNAME.
[EL Severe]: ejb: Local Exception Stack:
Exception [EclipseLink-7107] (Eclipse Persistence Services - 2.6.4.v20160829-44060b6): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Error encountered during string decryption.
Internal Exception: javax.crypto.IllegalBlockSizeException: Input length must be multiple of 8 when decrypting with padded cipher
at org.eclipse.persistence.exceptions.ValidationException.errorDecryptingPassword(ValidationException.java:894)
at org.eclipse.persistence.internal.security.JCEEncryptor.decryptPassword(JCEEncryptor.java:114)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.updateLogins(EntityManagerSetupImpl.java:2404)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.updateSession(EntityManagerSetupImpl.java:2716)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:710)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getAbstractSession(EntityManagerFactoryDelegate.java:205)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:183)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.getDatabaseSession(EntityManagerFactoryImpl.java:528)
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactoryImpl(PersistenceProvider.java:150)
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:188)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.buildEntityManagerFactory(Main.java:94)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.execute(Main.java:80)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.main(Main.java:68)
Caused by: javax.crypto.IllegalBlockSizeException: Input length must be multiple of 8 when decrypting with padded cipher
at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:913)
at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:824)
at com.sun.crypto.provider.DESCipher.engineDoFinal(DESCipher.java:314)
at javax.crypto.Cipher.doFinal(Cipher.java:2165)
at org.eclipse.persistence.internal.security.JCEEncryptor.decryptPassword(JCEEncryptor.java:109)
... 12 more
Exception in thread "main" javax.persistence.PersistenceException: Exception [EclipseLink-7107] (Eclipse Persistence Services - 2.6.4.v20160829-44060b6): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Error encountered during string decryption.
Internal Exception: javax.crypto.IllegalBlockSizeException: Input length must be multiple of 8 when decrypting with padded cipher
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:815)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getAbstractSession(EntityManagerFactoryDelegate.java:205)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:183)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.getDatabaseSession(EntityManagerFactoryImpl.java:528)
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactoryImpl(PersistenceProvider.java:150)
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:188)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.buildEntityManagerFactory(Main.java:94)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.execute(Main.java:80)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.main(Main.java:68)
Caused by: Exception [EclipseLink-7107] (Eclipse Persistence Services - 2.6.4.v20160829-44060b6): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Error encountered during string decryption.
Internal Exception: javax.crypto.IllegalBlockSizeException: Input length must be multiple of 8 when decrypting with padded cipher
at org.eclipse.persistence.exceptions.ValidationException.errorDecryptingPassword(ValidationException.java:894)
at org.eclipse.persistence.internal.security.JCEEncryptor.decryptPassword(JCEEncryptor.java:114)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.updateLogins(EntityManagerSetupImpl.java:2404)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.updateSession(EntityManagerSetupImpl.java:2716)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:710)
... 9 more
Caused by: javax.crypto.IllegalBlockSizeException: Input length must be multiple of 8 when decrypting with padded cipher
at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:913)
at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:824)
at com.sun.crypto.provider.DESCipher.engineDoFinal(DESCipher.java:314)
at javax.crypto.Cipher.doFinal(Cipher.java:2165)
at org.eclipse.persistence.internal.security.JCEEncryptor.decryptPassword(JCEEncryptor.java:109)
... 12 more
答案 0 :(得分：1)
这与使用版本 2.6.5-RC1 修复的已知bug有关。它也可以与最新的 2.6.5-RC2 发布候选版本（2017年6月开始提供）一起使用。
如果您有Maven项目，请更改 EclipseLink 依赖项的版本字符串，如下所示：
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>eclipselink</artifactId>
<version>2.6.5-RC2</version>
</dependency>
如果这是一个独立项目，请找到最新的2.6.5-RC2 jar file on Maven Central。只需删除旧的 jar 文件，然后将新文件放在应用程序的类路径中。
希望它有所帮助。