ejb3+jboss6+myeclipse8.6:的问题，连个HelloWorld都抛异常 在线等高手
接口package com;
public interface IHello
{
public String hello();
}
无状态的bean
package com.impl;
import javax.ejb.Remote;
import javax.ejb.Stateless;
import com.IHello;
@Remote({IHello.class})
@Stateless
public class Hello implements IHello
{
@Override
public String hello()
{
System.out.println("hello world!");
return "HEL!!";
}
}
客户端
package com.client;
import java.rmi.RMISecurityManager;
import java.util.Properties;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import com.IHello;
public class FirstTest {
public static void main(String[] args) throws NamingException
{
Properties props = new Properties();
props.setProperty("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");
props.setProperty("java.naming.provider.url", "localhost:8888");
InitialContext ctx = new InitialContext(props);
IHello hello = (IHello) ctx.lookup("Hello/remote");
hello.hello();
}
}
这个是《ejb3.0实例教程》上的例子照着敲得但是还是出现了异常
异常信息
Exception in thread "main" javax.naming.CommunicationException: Could not obtain connection to any of these urls: localhost:8888 and discovery failed with error: javax.naming.CommunicationException: Receive timed out [Root exception is java.net.SocketTimeoutException: Receive timed out]
at org.jnp.interfaces.NamingContext.discoverServer(NamingContext.java:1690)
at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1761)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:695)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:688)
at javax.naming.InitialContext.lookup(InitialContext.java:392)
at com.client.FirstTest.main(FirstTest.java:21)
Caused by: java.net.SocketTimeoutException: Receive timed out
at java.net.PlainDatagramSocketImpl.receive0(Native Method)
at java.net.PlainDatagramSocketImpl.receive(PlainDatagramSocketImpl.java:136)
at java.net.DatagramSocket.receive(DatagramSocket.java:712)
at org.jnp.interfaces.NamingContext.discoverServer(NamingContext.java:1659)
... 5 more
[Root exception is javax.naming.CommunicationException: Failed to retrieve stub from server localhost/127.0.0.1:8888 [Root exception is java.io.EOFException]]
at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1780)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:695)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:688)
at javax.naming.InitialContext.lookup(InitialContext.java:392)
at com.client.FirstTest.main(FirstTest.java:21)
Caused by: javax.naming.CommunicationException: Failed to retrieve stub from server localhost/127.0.0.1:8888 [Root exception is java.io.EOFException]
at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:329)
at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1746)
... 4 more
Caused by: java.io.EOFException
at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2281)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2750)
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:780)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:280)
at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:314)
... 5 more
--------------------编程问答-------------------- 学习中，我EJB没用过，LZ加油！ --------------------编程问答-------------------- 怎么没人回答啊，自己顶起 --------------------编程问答-------------------- 自己顶顶顶顶 --------------------编程问答-------------------- at com.client.FirstTest.main(FirstTest.java:21)
这句的问题。超时？ --------------------编程问答-------------------- 程序连不上jboss长时间得不到响应坑定会抱着个异常，我的问题是Could not obtain connection to any of these urls: localhost:8888 and discovery failed这个 --------------------编程问答-------------------- 自己在访问一下localhost:8888。在jndi list view下看是否能够找到你的hello/remote --------------------编程问答-------------------- url里面不要端口试试 --------------------编程问答-------------------- props.setProperty("java.naming.provider.url", "localhost:8888");
这个你改过了吗，
如果没有改过，jboss as 6 默认是1099的 ，
你可以看看
%jboss_home%\server\default\conf\bindingservice.beans\META-INF\bindings-jboss-beans.xml里面
的
<bean name="StandardBindings" class="java.util.HashSet">
<constructor>
<parameter class="java.util.Collection">
<set elementClass="org.jboss.services.binding.ServiceBindingMetadata">
<!-- ********************* conf/jboss-service.xml ****************** -->
<!-- Naming Service -->
<bean class="org.jboss.services.binding.ServiceBindingMetadata">
<property name="serviceName">jboss:service=Naming</property>
<property name="bindingName">Port</property>
<property name="port">1099</property>
<property name="description">The listening socket for the Naming service</property>
</bean>
是什么，props.setProperty("java.naming.provider.url", "localhost:8888");端口就是什么
补充：Java , Java EE
