javax.naming.NameNotFoundException:EJB未绑定

我已经为一个动态web项目创建了一个示例EJB模块，但是当我尝试访问使用EJB的Servlet时，我发现EJB没有绑定

package com.za.tutorial;
import javax.ejb.Stateless;     
@Stateless
public class ZASessionBean implements ZASessionBeanLocal {
public String demoSessionBean(){
    return "demoSessionBean";
}
}


package com.za.tutorial;
import javax.ejb.Local;
@Local
public interface ZASessionBeanLocal {
    public String demoSessionBean();
}

我已经创建了一个动态web项目，并在Servlet中使用上述EJB，如下所示

    package com.za.tutorial;

import java.io.IOException;
import java.io.PrintWriter;

import javax.ejb.EJB;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class ZaServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

/**
 * @see HttpServlet#HttpServlet()
 */
public ZaServlet() {
    super();
    // TODO Auto-generated constructor stub
}

@EJB(mappedName="ZASessionBean/local")
ZASessionBeanLocal objZASessionBean;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    System.out.println("#ZaServlet#start");
    PrintWriter out=response.getWriter();
    out.println(objZASessionBean.demoSessionBean());
    System.out.println("#ZaServlet#end");
}



}

javax.naming.NameNotFoundException: ZASessionBean not bound
org.jnp.server.NamingServer.getBinding(NamingServer.java:771)
org.jnp.server.NamingServer.getBinding(NamingServer.java:779)
org.jnp.server.NamingServer.getObject(NamingServer.java:785)
org.jnp.server.NamingServer.lookup(NamingServer.java:396)
org.jnp.interfaces.NamingContext.lookup(NamingContext.java:726)
org.jnp.interfaces.NamingContext.lookup(NamingContext.java:686)
javax.naming.InitialContext.lookup(InitialContext.java:392)
org.jnp.interfaces.NamingContext.resolveLink(NamingContext.java:1346)
org.jnp.interfaces.NamingContext.lookup(NamingContext.java:817)
org.jnp.interfaces.NamingContext.lookup(NamingContext.java:686)
org.jboss.ejb3.JndiUtil.lookup(JndiUtil.java:44)
org.jboss.injection.JndiPropertyInjector.lookup(JndiPropertyInjector.java:75   )
org.jboss.injection.JndiPropertyInjector.inject(JndiPropertyInjector.java:99    )
...........

我用EJB和web项目创建了一个Ear，然后部署在JBoss5中。部署后，我可以看到我的EJB部署在服务器控制台中

但当我访问servlet时，仍然是这样

我得到如下EJB未绑定异常

    package com.za.tutorial;

import java.io.IOException;
import java.io.PrintWriter;

import javax.ejb.EJB;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class ZaServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

/**
 * @see HttpServlet#HttpServlet()
 */
public ZaServlet() {
    super();
    // TODO Auto-generated constructor stub
}

@EJB(mappedName="ZASessionBean/local")
ZASessionBeanLocal objZASessionBean;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    System.out.println("#ZaServlet#start");
    PrintWriter out=response.getWriter();
    out.println(objZASessionBean.demoSessionBean());
    System.out.println("#ZaServlet#end");
}



}

javax.naming.NameNotFoundException: ZASessionBean not bound
org.jnp.server.NamingServer.getBinding(NamingServer.java:771)
org.jnp.server.NamingServer.getBinding(NamingServer.java:779)
org.jnp.server.NamingServer.getObject(NamingServer.java:785)
org.jnp.server.NamingServer.lookup(NamingServer.java:396)
org.jnp.interfaces.NamingContext.lookup(NamingContext.java:726)
org.jnp.interfaces.NamingContext.lookup(NamingContext.java:686)
javax.naming.InitialContext.lookup(InitialContext.java:392)
org.jnp.interfaces.NamingContext.resolveLink(NamingContext.java:1346)
org.jnp.interfaces.NamingContext.lookup(NamingContext.java:817)
org.jnp.interfaces.NamingContext.lookup(NamingContext.java:686)
org.jboss.ejb3.JndiUtil.lookup(JndiUtil.java:44)
org.jboss.injection.JndiPropertyInjector.lookup(JndiPropertyInjector.java:75   )
org.jboss.injection.JndiPropertyInjector.inject(JndiPropertyInjector.java:99    )
...........

---

我尝试添加具有以下内容的jboss.xml

ZASessionBean ZASessionBean

我把它放在jboss的deploy文件夹中..但仍然面临同样的问题..有人请帮助解决这个问题，在ejb模块中添加jboss.xml..查看服务器日志，查看部署过程中的错误。如果您可以看到关于部署bean的日志，并且没有错误，那么请尝试使用jmx控制台查看向JNDI注册的内容。