Flex 调用 java jndi

<mx:RemoteObject id="Hello" destination="roDest">
<mx:method name="getHelloData"/>
</mx:RemoteObject

...
public void getHelloData() {
    try{
        InitialContext ctx = new InitialContext();

        Object obj = ctx.lookup("/Hello");

        HelloHome ejbHome = (HelloHome)

        PortableRemoteObject.narrow(obj, HelloHome.class);

        HelloObject ejbObject = ejbHome.create();

        String message = ejbObject.sayHello();
        }
    catch (Exception e);
    }
...