网络编程_实现TCP的网络编程3_客户端发送文件给服务端,服务端将文件保存在本地

package com.zhou.java1;

import org.junit.Test;

import java.io.*;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;

/**
 * 实现 TCP 的网络编程
 * 例子 3: 客户端发送文件给服务端,服务端将文件保存在本地.并返回"发送成功"给客户端
 * @author upzhou
 * @create 2022-03-31 17:20
 */
public class TCPTest3 {
     /*
    这里涉及到的异常应该使用 try-catch-finally 处理
     */

    @Test
    public void client() throws IOException {
        //1. 造 socket
        Socket socket = new Socket(InetAddress.getByName("127.0.0.1"), 9090);
        //2. 获取输出流
        OutputStream os = socket.getOutputStream();
        //3. 获取输入流,读取数据
        FileInputStream fis = new FileInputStream(new File("小猫.jpg"));
        //4. 读写
        byte[] buffer = new byte[1024];
        int len;
        while ((len = fis.read(buffer)) != -1){
            os.write(buffer,0,len);
        }
        //5. 接收来自于服务器端的数据,并显示到控制台上
        InputStream is = socket.getInputStream();

        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        byte[] buffer1 = new byte[20];
        int len1;
        while ((len1 = is.read(buffer1)) != -1){
            baos.write(buffer,0,len1);
        }

        System.out.println(baos.toString());


        //6. 关闭
        fis.close();
        os.close();
        socket.close();
    }

    @Test
    public void server() throws IOException {
        //1. 造 serversocket
        ServerSocket ss = new ServerSocket(9090);
        //2. 获取客服端的 serversocket
        Socket socket = ss.accept();
        //3. 获取客户端的输入流
        InputStream is = socket.getInputStream();
        //4. 保存数据到本地
        FileOutputStream fos = new FileOutputStream(new File("小猫3.jpg"));
        //5.读写
        byte[] buffer = new byte[1024];
        int len;
        while ((len = is.read(buffer)) != -1){
            fos.write(buffer,0,len);
        }
        //6.服务器端给与客户端反馈
        OutputStream os = socket.getOutputStream();
        os.write("你好,照片我已收到,很可爱!".getBytes());

        //7. 关闭
        fos.close();
        is.close();
        socket.close();
        ss.close();



    }
}