import import import import import public class Client {
   
    /**
     * @param args
     */
    public static void main(String[] args) {
        Socket socket = null;
        int count = 0;
       
        try {
            socket = new Socket(InetAddress.getLocalHost(),4700);
           
            DataInputStream is = new DataInputStream(socket.getInputStream());
            DataOutputStream os = new DataOutputStream(socket.getOutputStream());
           
            System.out.print(is.readUTF());
           
                while(true){
                    os.writeUTF("你好啊" + count);
                    count++;
                }
            
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{
            try {
                socket.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        

    }

}

程序这样写的话可以给服务器发送你好啊，可是如果

    while(true){
                    os.writeUTF("你好啊" + count);

                    count++;
                }
改成

os.writeUTF("你好啊" + count);

那么这一条就发送不过去是为什么啊，怎么解决呢？