本程序分服务端和客户端

server.java

package com.xxx.socket;
 
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.ServerSocket;
import java.net.Socket;
/**
 * @author Binxu - Silic
 */
public class Server {
        public static void main(String[] args) throws Exception {
                //开放服务端10000端口
                ServerSocket ss = new ServerSocket(10000);
                //阻塞等待
                Socket s = ss.accept();
                //读取客户端传过来的数据
                BufferedReader bufIn = new BufferedReader(new InputStreamReader(s
                                .getInputStream()));
                //向客户端传送数据
                BufferedWriter bufOut = new BufferedWriter(new OutputStreamWriter(s
                                .getOutputStream()));
                String line = null;
                //向客户端返回执行命令后结果
                while ((line = bufIn.readLine()) != null) {
                        bufOut.write(ToServerName(line));
                        bufOut.newLine();
                        bufOut.flush();
                }
                s.close();
                ss.close();
        }
 
        private static String ToServerName(String cmd) throws IOException {
                StringBuffer sb = new StringBuffer();
                //判断系统是否是windows
                if (System.getProperty("os.name").toLowerCase().startsWith("windows")) {
                        //执行命令
                        Process p = Runtime.getRuntime().exec("cmd.exe  /c " + cmd);
                        //读取命令正确执行后的流
                        BufferedReader buff = new BufferedReader(new InputStreamReader(p
                                        .getInputStream()));
                        //读取错误命令执行后的流
                        BufferedReader beff = new BufferedReader(new InputStreamReader(p
                                        .getErrorStream()));
                        String Me;
                        //添加到一个StringBuffer 中以便一次性返回
                        while ((Me = buff.readLine()) != null || (Me=beff.readLine())!=null) {
                                sb.append(Me + "@@");
                        }
                }else{
                        //执行命令过程同上理 
                        Process p = Runtime.getRuntime().exec(cmd);
                        BufferedReader buff = new BufferedReader(new InputStreamReader(p
                                        .getInputStream()));
                        BufferedReader beff = new BufferedReader(new InputStreamReader(p
                                        .getErrorStream()));
                        String Me;
                        while ((Me = buff.readLine()) != null || (Me=beff.readLine())!=null) {
                                sb.append(Me + "@@");
                        }
                }
                //返回命令执行后结果。
                return sb.toString();
        }
}

client.java

package com.xxx.socket;
 
import java.io.*;
import java.net.*;
/**
 * @author Binxu -Silic
 */
public class Client {
        //连接信息
        public static final String ip = "localhost";
        public static final int port = 10000;
 
        public static void main(String[] args) throws Exception {
                //连接目标
                Socket s = new Socket(ip, port);
                System.out.print("$:");
                //获取输入命令
                 BufferedReader bufr = 
                         new BufferedReader(new InputStreamReader(System.in));
                 //向服务端写数据
                 BufferedWriter bufOut = 
                         new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
                 //读取服务端返回数据
                 BufferedReader bufIn = 
                         new BufferedReader(new InputStreamReader(s.getInputStream()));
 
                 String line = null;
                 //接受服务端返回数据并显示
                 while((line = bufr.readLine()) != null)
                 {
                         if("exit".equals(line))
                                 break;
                         bufOut.write(line);
                         bufOut.newLine();
                         bufOut.flush();
                         String str = bufIn.readLine().replaceAll("@@","\n");
                         System.out.print(str);
                         System.out.print("$:");        
                 }                
                 bufr.close();
                 s.close();
        }
}