求大神解答这是在哪个包下的类

Question

ttpURLConnection httpConnection = (HttpURLConnection)url.openConnection();

httpConnection.setReadTimeout(20000);//设置http连接的读超时,单位是毫秒

        httpConnection.connect();  
        Client client = new Client(httpConnection.getInputStream(), null);  
        client.setProperty(CommonsHttpMessageSender.HTTP_TIMEOUT, String.valueOf( 20000 ));//设置发送的超时限制,单位是毫秒;  
        client.setProperty(CommonsHttpMessageSender.DISABLE_KEEP_ALIVE, "true");  
        client.setProperty(CommonsHttpMessageSender.DISABLE_EXPECT_CONTINUE, "true"); 

求大神解答，Client和CommonsHttpMessageSender这两个类是哪个包下的，
我现在的版本xfire1.2.2这版本里没有CommonsHttpMessageSender.DISABLE_EXPECT_CONTINUE这两个常量

Answer 1

Client这个类应该是个自定义类