我一直在尝试设置一个JPA Web应用程序，但我遇到了一些问题，我已经使之前的JPA应用程序运行但我不记得我错过了哪一步。以下是我在设置应用程序时采取的步骤，我正在使用Netbeans。
1.右键单击库并添加库EclipseLink（JPA 2.1），它添加了eclipselink.jar， javax.persistence_2.1.0v201304241213.jar， org.eclipse.persistence.jpa.modelgen_2.5.2.v20140319-9ad6abd.jar
DROP DATABASE如果存在TempDB;
CREATE DATABASE TempDB;
USE TempDB;
CREATE TABLE user(
name VARCHAR(50),
password VARCHAR(50),
PRIMARY KEY (name)
);
3.从数据库生成实体类
Generate Entity class settings 1 image
Generate Entity class settings 2 Image
User.java文件：
package jpa.test;
import java.io.Serializable;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.Table;
import javax.xml.bind.annotation.XmlRootElement;
@Entity
@Table(name = "user")
@XmlRootElement
@NamedQueries({
@NamedQuery(name = "User.findAll", query = "SELECT u FROM User u")
, @NamedQuery(name = "User.findByName", query = "SELECT u FROM User u WHERE u.name = :name")
, @NamedQuery(name = "User.findByPassword", query = "SELECT u FROM User u WHERE u.password = :password")})
public class User implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@Basic(optional = false)
@Column(name = "name")
private String name;
@Column(name = "password")
private String password;
public User() {
}
public User(String name) {
this.name = name;
}
public User(String name, String password) {
this.name = name;
this.password = password;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
@Override
public int hashCode() {
int hash = 0;
hash += (name != null ? name.hashCode() : 0);
return hash;
}
@Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof User)) {
return false;
}
User other = (User) object;
if ((this.name == null && other.name != null) || (this.name != null && !this.name.equals(other.name))) {
return false;
}
return true;
}
@Override
public String toString() {
return "jpa.test.User[ name=" + name + " ]";
}
}
Persistance.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="WebApplication3PU" transaction-type="RESOURCE_LOCAL">
<non-jta-data-source>jdbc/TempDB</non-jta-data-source>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties/>
</persistence-unit>
</persistence>
test.java：
package jpa.test;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Persistence;
public class test
{
public static void main(String[] args)
{
EntityManagerFactory factory = Persistence.createEntityManagerFactory("WebApplication3PU");
EntityManager em = factory.createEntityManager();
EntityTransaction trans = em.getTransaction();
User user = new User("John","Doe");
try
{
trans.begin();
em.persist(user);
trans.commit();
} catch (Exception ex) {
trans.rollback();
} finally {
em.close();
}
}
}
错误堆栈跟踪：
run:
Nov 13, 2017 7:36:04 PM org.hibernate.validator.internal.util.Version <clinit>
INFO: HV000001: Hibernate Validator 5.2.4.Final
[EL Info]: 2017-11-13 19:36:04.847--ServerSession(364597300)--EclipseLink, version: Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd
org.omg.CORBA.COMM_FAILURE: FINE: 00410001: Connection failure: socketType: IIOP_CLEAR_TEXT; hostname: localhost; port: 3700 vmcid: OMG minor code: 1 completed: No
at com.sun.proxy.$Proxy19.connectFailure(Unknown Source)
at com.sun.corba.ee.impl.transport.ConnectionImpl.<init>(ConnectionImpl.java:253)
at com.sun.corba.ee.impl.transport.ConnectionImpl.<init>(ConnectionImpl.java:276)
at com.sun.corba.ee.impl.transport.ContactInfoImpl.createConnection(ContactInfoImpl.java:129)
at com.sun.corba.ee.impl.protocol.ClientRequestDispatcherImpl.beginRequest(ClientRequestDispatcherImpl.java:242)
at com.sun.corba.ee.impl.protocol.ClientDelegateImpl.request(ClientDelegateImpl.java:220)
at com.sun.corba.ee.impl.protocol.ClientDelegateImpl.is_a(ClientDelegateImpl.java:378)
at org.omg.CORBA.portable.ObjectImpl._is_a(ObjectImpl.java:130)
at org.omg.CosNaming.NamingContextHelper.narrow(NamingContextHelper.java:69)
at com.sun.enterprise.naming.impl.SerialContext$ProviderCacheKey.getNameService(SerialContext.java:1208)
at com.sun.enterprise.naming.impl.SerialContext.getRemoteProvider(SerialContext.java:395)
at com.sun.enterprise.naming.impl.SerialContext.getProvider(SerialContext.java:331)
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:480)
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:440)
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:625)
at javax.naming.InitialContext.lookup(InitialContext.java:421)
at org.eclipse.persistence.sessions.JNDIConnector.connect(JNDIConnector.java:103)
at org.eclipse.persistence.sessions.DatasourceLogin.connectToDatasource(DatasourceLogin.java:162)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.setOrDetectDatasource(DatabaseSessionImpl.java:204)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:741)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:239)
[EL Severe]: ejb: 2017-11-13 19:37:29.687--ServerSession(364597300)--Exception [EclipseLink-7060] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Cannot acquire data source [jdbc/TempDB].
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:685)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getAbstractSession(EntityManagerFactoryDelegate.java:204)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:304)
Internal Exception: javax.naming.NamingException: Lookup failed for 'jdbc/TempDB' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [Root exception is javax.naming.NamingException: Unable to acquire SerialContextProvider for SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [Root exception is org.omg.CORBA.COMM_FAILURE: FINE: 00410001: Connection failure: socketType: IIOP_CLEAR_TEXT; hostname: localhost; port: 3700 vmcid: OMG minor code: 1 completed: No]]
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:336)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:302)
at jpa.test.test.main(test.java:22)
Caused by: java.lang.RuntimeException: java.net.ConnectException: Connection refused: connect
at org.glassfish.enterprise.iiop.impl.IIOPSSLSocketFactory.createSocket(IIOPSSLSocketFactory.java:368)
at com.sun.corba.ee.impl.transport.ConnectionImpl.<init>(ConnectionImpl.java:250)
... 25 more
Caused by: java.net.ConnectException: Connection refused: connect
at sun.nio.ch.Net.connect0(Native Method)
at sun.nio.ch.Net.connect(Net.java:454)
at sun.nio.ch.Net.connect(Net.java:446)
at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:648)
at com.sun.corba.ee.impl.misc.ORBUtility.openSocketChannel(ORBUtility.java:110)
at org.glassfish.enterprise.iiop.impl.IIOPSSLSocketFactory.createSocket(IIOPSSLSocketFactory.java:344)
... 26 more
Exception in thread "main" javax.persistence.PersistenceException: Exception [EclipseLink-7060] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Cannot acquire data source [jdbc/TempDB].
Internal Exception: javax.naming.NamingException: Lookup failed for 'jdbc/TempDB' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [Root exception is javax.naming.NamingException: Unable to acquire SerialContextProvider for SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [Root exception is org.omg.CORBA.COMM_FAILURE: FINE: 00410001: Connection failure: socketType: IIOP_CLEAR_TEXT; hostname: localhost; port: 3700 vmcid: OMG minor code: 1 completed: No]]
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:766)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getAbstractSession(EntityManagerFactoryDelegate.java:204)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:304)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:336)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:302)
at jpa.test.test.main(test.java:22)
Caused by: Exception [EclipseLink-7060] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Cannot acquire data source [jdbc/TempDB].
Internal Exception: javax.naming.NamingException: Lookup failed for 'jdbc/TempDB' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [Root exception is javax.naming.NamingException: Unable to acquire SerialContextProvider for SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [Root exception is org.omg.CORBA.COMM_FAILURE: FINE: 00410001: Connection failure: socketType: IIOP_CLEAR_TEXT; hostname: localhost; port: 3700 vmcid: OMG minor code: 1 completed: No]]
at org.eclipse.persistence.exceptions.ValidationException.cannotAcquireDataSource(ValidationException.java:520)
at org.eclipse.persistence.sessions.JNDIConnector.connect(JNDIConnector.java:109)
at org.eclipse.persistence.sessions.DatasourceLogin.connectToDatasource(DatasourceLogin.java:162)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.setOrDetectDatasource(DatabaseSessionImpl.java:204)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:741)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:239)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:685)
... 5 more
Caused by: javax.naming.NamingException: Lookup failed for 'jdbc/TempDB' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [Root exception is javax.naming.NamingException: Unable to acquire SerialContextProvider for SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [Root exception is org.omg.CORBA.COMM_FAILURE: FINE: 00410001: Connection failure: socketType: IIOP_CLEAR_TEXT; hostname: localhost; port: 3700 vmcid: OMG minor code: 1 completed: No]]
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:494)
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:440)
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:625)
at javax.naming.InitialContext.lookup(InitialContext.java:421)
at org.eclipse.persistence.sessions.JNDIConnector.connect(JNDIConnector.java:103)
... 10 more
Caused by: javax.naming.NamingException: Unable to acquire SerialContextProvider for SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [Root exception is org.omg.CORBA.COMM_FAILURE: FINE: 00410001: Connection failure: socketType: IIOP_CLEAR_TEXT; hostname: localhost; port: 3700 vmcid: OMG minor code: 1 completed: No]
at com.sun.enterprise.naming.impl.SerialContext.getProvider(SerialContext.java:336)
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:480)
... 14 more
Caused by: org.omg.CORBA.COMM_FAILURE: FINE: 00410001: Connection failure: socketType: IIOP_CLEAR_TEXT; hostname: localhost; port: 3700 vmcid: OMG minor code: 1 completed: No
at com.sun.proxy.$Proxy19.connectFailure(Unknown Source)
at com.sun.corba.ee.impl.transport.ConnectionImpl.<init>(ConnectionImpl.java:253)
at com.sun.corba.ee.impl.transport.ConnectionImpl.<init>(ConnectionImpl.java:276)
at com.sun.corba.ee.impl.transport.ContactInfoImpl.createConnection(ContactInfoImpl.java:129)
at com.sun.corba.ee.impl.protocol.ClientRequestDispatcherImpl.beginRequest(ClientRequestDispatcherImpl.java:242)
at com.sun.corba.ee.impl.protocol.ClientDelegateImpl.request(ClientDelegateImpl.java:220)
at com.sun.corba.ee.impl.protocol.ClientDelegateImpl.is_a(ClientDelegateImpl.java:378)
at org.omg.CORBA.portable.ObjectImpl._is_a(ObjectImpl.java:130)
at org.omg.CosNaming.NamingContextHelper.narrow(NamingContextHelper.java:69)
at com.sun.enterprise.naming.impl.SerialContext$ProviderCacheKey.getNameService(SerialContext.java:1208)
at com.sun.enterprise.naming.impl.SerialContext.getRemoteProvider(SerialContext.java:395)
at com.sun.enterprise.naming.impl.SerialContext.getProvider(SerialContext.java:331)
... 15 more
Caused by: java.lang.RuntimeException: java.net.ConnectException: Connection refused: connect
at org.glassfish.enterprise.iiop.impl.IIOPSSLSocketFactory.createSocket(IIOPSSLSocketFactory.java:368)
at com.sun.corba.ee.impl.transport.ConnectionImpl.<init>(ConnectionImpl.java:250)
... 25 more
Caused by: java.net.ConnectException: Connection refused: connect
at sun.nio.ch.Net.connect0(Native Method)
at sun.nio.ch.Net.connect(Net.java:454)
at sun.nio.ch.Net.connect(Net.java:446)
at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:648)
at com.sun.corba.ee.impl.misc.ORBUtility.openSocketChannel(ORBUtility.java:110)
at org.glassfish.enterprise.iiop.impl.IIOPSSLSocketFactory.createSocket(IIOPSSLSocketFactory.java:344)
... 26 more
C:\Users\buttons\AppData\Local\NetBeans\Cache\8.2\executor-snippets\run.xml:53: Java returned: 1
BUILD FAILED (total time: 1 minute 27 seconds)
就像我上面说过的，我很久以前就有其他JPA应用程序工作了，我已经将这些应用程序指向了TempDB连接并且它可以工作但是如果我使用不同的sql文件并在那些旧应用程序中生成新实体我得到了上述错误。