import *;
import *;
public class qqServer {
    public static void main(String[] args) {
        try{
        ServerSocket ss = new ServerSocket(8888);
        Socket s =ss.accept();
        BufferedReader in= new BufferedReader(new InputStreamReader(System.in));
        
        BufferedReader bb  = new BufferedReader(new InputStreamReader(s.getInputStream()));   
        PrintWriter p = new PrintWriter(s.getOutputStream());
        System.out.println("你:" + bb.readLine());
        String r = in.readLine();
        while(!r.equals("byebye")){
            p.println(r);
            p.flush();
            System.out.println("我:"+r);
            System.out.println("你"+bb.readLine());
            r=in.readLine();
        }
        bb.close();
        p.close();
        s.close();
        }catch(Exception e) {
            e.printStackTrace();
        }
        }
        
    }



import *;
import *;
public class qqClient {
    public static void main(String[] args) {
        try{
            Socket s = new Socket("127.0.0.1",8888);
            BufferedReader bb = new BufferedReader(new InputStreamReader(s.getInputStream()));
            BufferedReader bin = new BufferedReader(new InputStreamReader(System.in));
            PrintWriter p = new PrintWriter(s.getOutputStream());   
            String re = bin.readLine();
            while (!re.equals("byebye")) {               
                p.println(re);
                p.flush();
                System.out.println("你:" + re);
                System.out.println("我"+bb.readLine());
                re = bin.readLine();
            }
            p.close();
            bb.close();
            s.close();
        }catch(IOException e) {
            e.printStackTrace();
        }
    }
}
此两段代码为模拟QQ对话功能，但是只能在客户端输入数据后，客户端与服务器就均没反应。备注：验证过两端可以连接上。

运行了下，没有问题，想了想，你是不是服务没有启动啊，两边都要起的

谢谢了，刚才运行下确实是可以了，昨天怎么弄都不行。

java在现在的市场上来看 、很多网站的开发都避免使用了  以后是php的时代  php还比java简单  可以学学php  和java相比有很多优势。