Socket网络编程

服务器端创建 ServerSocket对象管理
ServerSocket s = new ServerSocket(端口号)；
有一个监听客户端请求的方法：Socket accept()； 如果有客户端Socket1连接，那么将返回一个与客户端Socket对应的Socket2
ServerSocket s = new ServerSocket(端口号)；
While(true){
//如果没有客户端Socket发送连接请求，那么该方法将一直处于等待状态
Socket a = s.accept();
//接下来就可以进行Socket通信了
例如下面实现服务器与客户端简单的连接

package serversocket;

import java.io.IOException;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;

public class Server {
    public static void main(String[] args) throws IOException {
        ServerSocket ss = new ServerSocket(30013);
        while(true) {
            Scanner sc = new Scanner(System.in);
            Socket s = ss.accept();
            PrintStream ps = new PrintStream(s.getOutputStream());  
            ps.println(System.currentTimeMillis()+"这里是服务器");

            while(sc.hasNextLine()) {
                ps.println(sc.nextLine());
            }
            sc.close();
            ps.close();
            s.close();

        }
    }

}


package serversocket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;

public class Client {
    public static void main(String[] args) {
        try {
            Socket socket = new Socket("127.0.0.1",30013);
            BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));

        System.out.println("来自服务器127.0.0.1，端口号为30000的数据");
        String s = null;
        while((s=br.readLine())!=null) {
            System.out.println(s);

        }


        br.close();
        socket.close();

    } catch (IOException e) {

        e.printStackTrace();
    }

}