Server端：import java.net.*;
import java.io.*;
public class DOSServer {
private static Socket s = null;
private static ServerSocket ss = null;
public static void main (String[] args) throws Exception {
ss = new ServerSocket (8880);
s = ss.accept(); //阻塞式的方法，此方法在连接传入之前一直阻塞
ClientThread ct = new ClientThread(s);
new Thread(ct).start();
System.out.println ("客户端已经连接！");
}
}
class ClientThread implements Runnable {  
private Socket s;
private DataInputStream dis;
public ClientThread (Socket s) throws Exception {
this.s = s;
dis = new DataInputStream(s.getInputStream());
}
public void run() {
while (true) {
try {
String str1;
str1 = dis.readUTF();
System.out.println(str1);
} catch (IOException e) {
e.printStackTrace();
}
//DataOutputStream dos = new DataOutputStream(s.getOutputStream());
//BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
//String str2 = "Server: " + br.readLine();
//dos.writeUTF(str2);
}
}
}
Client端：
import java.net.*;
import java.io.*;
public class DOSClient {
public static void main (String[] args) throws Exception {
Socket s = new Socket("127.0.0.1", 8880);
while (true) {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String str1 = "Client: " + br.readLine();
DataOutputStream dos = new DataOutputStream(s.getOutputStream());
dos.writeUTF(str1);
//DataInputStream dis = new DataInputStream(s.getInputStream());
//String str2 = dis.readUTF();
//System.out.println(str2);
}
}
}

提问：为什么Server端只能连接一个Client端

import java.io.DataInputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
public class DOSServer {
private static Socket s = null;
private static ServerSocket ss = null;
public static void main (String[] args) throws Exception {
ss = new ServerSocket (8880);
while(true) 这里加个while(true)就好了，让server端不断等待客户端，否则server端接收一个客户端后，便不再做接收client端的事情了。
{
s = ss.accept(); //阻塞式的方法，此方法在连接传入之前一直阻塞
ClientThread ct = new ClientThread(s);
new Thread(ct).start();
System.out.println ("客户端已经连接！");
}
}
}
class ClientThread implements Runnable {  
        private Socket s;
        private DataInputStream dis;
        public ClientThread (Socket s) throws Exception
        {
        this.s = s;
        dis = new DataInputStream(s.getInputStream());
    }
    public void run() {
                while (true) {
                try {
                String str1;
                str1 = dis.readUTF();
                System.out.println(str1);
                } catch (IOException e) {
                e.printStackTrace();
                }
//DataOutputStream dos = new DataOutputStream(s.getOutputStream());
//BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
//String str2 = "Server: " + br.readLine();
//dos.writeUTF(str2);
    }
}
}

标题回复求加分啊。解决了

标题求加分啊！解决啦！手机党伤不起啊！

标题求加分啊！解决啦！手机党伤不起啊！二楼回复求加分啊！