EJB下remote not bound 错误

EJB报错如下：

javax.naming.NameNotFoundException: remote not bound at org.jnp.server.NamingServer.getBinding(NamingServer.java:529) at org.jnp.server.NamingServer.getBinding(NamingServer.java:537) at org.jnp.server.NamingServer.getObject(NamingServer.java:543) at org.jnp.server.NamingServer.lookup(NamingServer.java:296) at org.jnp.server.NamingServer.lookup(NamingServer.java:270) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:305) at sun.rmi.transport.Transport$1.run(Transport.java:159) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:155) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:255) at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:233) at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:142) at org.jnp.server.NamingServer_Stub.lookup(Unknown Source) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:667) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:627) at javax.naming.InitialContext.lookup(InitialContext.java:392) at junit.test.PersionServiceTest.setUpBeforeClass(PersionServiceTest.java:22) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.junit.internal.runners.BeforeAndAfterRunner.invokeMethod(BeforeAndAfterRunner.java:74) at org.junit.internal.runners.BeforeAndAfterRunner.runBefores(BeforeAndAfterRunner.java:50) at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:33) at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:38) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196) 

 

当然就算是初学者也知道，绑定不上远程！可到底是哪里绑定不上呢？可以一步步的测试！

先看三个文件：

远程接口文件：

package service.impl;import java.util.List;import javax.ejb.Remote;import javax.ejb.Stateless;import javax.persistence.EntityManager;import javax.persistence.PersistenceContext;import service.PersionService;import bean.Persion;@Stateless@Remote(PersionService.class)public class PersoinServiceBean implements PersionService {@PersistenceContext(unitName = "golden")EntityManager en;public void delete(Integer persionid) {en.remove(en.getReference(Persion.class, persionid));}public Persion getPersion(Integer persionid) {return en.find(Persion.class, persionid);}@SuppressWarnings("unchecked")public List<Persion> getPersions() {return en.createQuery("select * from Persion p").getResultList();}public void save(Persion persion) {en.persist(persion);}public void update(Persion persion) {en.merge(persion);}}

 

连接池配置文件：persistence.xml(在项目SRC下的META-INF下)

<?xml version="1.0" encoding="UTF-8"?><persistence 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_1_0.xsd"version="1.0"><persistence-unit name="golden" transaction-type="JTA"><jta-data-source>java:goldenDS</jta-data-source></persistence-unit></persistence>

 

Jboss连接数据库配置文件，这里是用的是Mysql

<?xml version="1.0" encoding="UTF-8"?><datasources><local-tx-datasource><jndi-name>goldenDS</jndi-name><connection-url>jdbc:mysql://localhost:3306/golden?useUnicode=true&amp;characterEncoding=utf-8</connection-url><driver-class>com.mysql.jdbc.Driver</driver-class><user-name>root</user-name><password>root</password><exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name><metadata><type-mapping>mySQL</type-mapping></metadata></local-tx-datasource></datasources>

 

1.先看服务器是否连接上了数据库，启动服务器 连接到主页从 JMX Console 可以看到相应链接池的情况

 

2.看远程接口是否正确，去除管理对象

@PersistenceContext(unitName = "golden") EntityManager en;

 

这时通过测试看是否能得到远程的对象

如果远程无法绑定或相应的远程接口无法绑定，则一个可能是由于接口本身创建时错误，还有可能是接口实现类内部调用的对象出错！

本次错误就是因为调用的管理对象无法创建造成的！

首选是服务器配置文件的错误，连接字符串不正确，再者，persistence.xml一定要在META-INF下切这个文件名称全是小写！