import java.net.*; import java.io.*; //Download by http://www.codefans.net public class SocketServerDemo{ int port=2345; //端口号 ServerSocket serverSocket; //服务器套接字 public SocketServerDemo(){ try{ serverSocket=new ServerSocket(port); //实例化套接字 System.out.println("start server at port "+port); //在命令窗口输出提示信息 while (true){ //一直等待客户端连接 Socket client=serverSocket.accept(); //等待连接 System.out.println("Connect: "+client.getInetAddress()); //输出客户机地址 DataInputStream in=new DataInputStream(client.getInputStream()); //得到输入流 DataOutputStream out=new DataOutputStream(client.getOutputStream()); //得到输出流 byte[] message="Connect ok.This message is from server.".getBytes(); //输出信息字符数组 out.write(message,0,message.length); //输出信息 } } catch (IOException ex){ ex.printStackTrace(); //输出错误信息 } } public static void main(String[] args){ new SocketServerDemo(); } }