网络编程_服务器给客户端一个反馈案例

package cn.itcast_07;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

/*
 * TCP协议接收数据:
 *     A:创建接收端Socket对象
 *     B:监听客户端
 *     C:获取输入流,显示到客户端
 *     D:返馈数据
 *     D:释放监听资源
 */
public class ServerDemo {
  public static void main(String[] args) throws IOException {
    // 创建接收端Socket对象
    ServerSocket ss = new ServerSocket(12306);

    // 监听客户端
    Socket s = ss.accept();

    // 获取输入流
    InputStream is = s.getInputStream();

    byte[] bys = new byte[1024];
    int len = is.read(bys);
    String server = new String(bys, 0, len);
    System.out.println("server:" + server);

    // 获取输出流
    OutputStream os = s.getOutputStream();
    os.write("嘿,tcp,你的数据我收到了".getBytes());

    // 释放监听资源
    s.close();
  }
}

package cn.itcast_07;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;

/*
 * TCP协议发送端:
 *     A:创建发送端对象Socket
 *     B:获取输出流,发送数据
 *     C:获输入流,接收返馈数据并显示到控制台
 *     D:释放资源
 */
public class ClientDemo {
  public static void main(String[] args) throws IOException {
    // 创建发送端对象Socket
    Socket s = new Socket("192.168.31.165", 12306);

    // 获取输出流
    OutputStream os = s.getOutputStream();
    os.write("hello,tcp,我来了".getBytes());

    // 获取输入流
    InputStream is = s.getInputStream();
    byte[] bys = new byte[1024];
    int len = is.read(bys);
    String client = new String(bys, 0, len);
    System.out.println("client:" + client);

    // 释放资源
    s.close();
  }
}