Java中的Socket的用法

Java中的网络通信是通过Socket实现的，Socket分为ServerSocket和Socket两大类，ServerSocket用于服务端，可以通过accept方法监听请求，监听到请求后返回Socket，Socket用于具体完成数据传输，客户端直接使用Socket发起请求并传输数据

/**
 * 客户端-套接字
 * @author Administrator
 *  */
public class Client {
    public static void main(String args[]) {
        String msg = "Client Data";
        try {
            //创建一个Socket，跟本机的8080端口连接
            Socket socket = new Socket("127.0.0.1",8080);
            //使用Socket创建PrintWriter和BufferedReader进行读写数据
            PrintWriter pw = new PrintWriter(socket.getOutputStream());
            BufferedReader is = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            //发送数据
            pw.println(msg);
            pw.flush();
            //接收数据
            String line = is.readLine();
            System.out.println("received from server: " + line);
            //关闭资源
            pw.close();
            is.close();
            socket.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

/**
 * 服务端-套接字
 * @author Administrator
 *  */
public class Server {
    public static void main(String args[]) {
        try {
            //创建一个ServerSocket监听8080端口
            ServerSocket server = new ServerSocket(8080);
            //等待请求
            Socket socket = server.accept();
            //接收到请求后使用socket进行通信，创建BufferedReader用于读取数据，
            BufferedReader is = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            String line = is.readLine();
            System.out.println("received from client: " + line);
            //创建PrintWriter，用于发送数据
            PrintWriter pw = new PrintWriter(socket.getOutputStream());
            pw.println("received data: " + line);
            pw.flush();
            //关闭资源
            pw.close();
            is.close();
            socket.close();
            server.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

这里因为是自己的电脑既是服务器又是客户端，先运行Server程序，再运行Client程序。