Properties ht = new Properties ();
   ht.putContext.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFactory");
   ht.put(Context.PROVIDER_URL,"t3://localhost:7001
   javax.naming.Context ctx = new InitialContext(ht);
   //或者
   //Properties ht = new Properties();
   //ht.put(Context.SECURITY_PRINCIPAL,"mydomain");//weblogic的domain
   //ht.put(Context.SECURITY_CREDENTIALS,"weblogic");