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题目

• 客户端：将本地文件上传到服务器，接收服务器的反馈
• 服务端：接收客户端上传的文件，上传完毕之后给出反馈

代码实战

1、客户端代码

package com.heima;import java.io.*;
import java.net.Socket;public class Client {public static void main(String[] args) throws IOException {Socket socket = new Socket("127.0.0.1",10000);//读取本地文件中的数据，并写到服务器中BufferedInputStream bis = new BufferedInputStream(new FileInputStream("G:\\wjkwk\\clientdir\\123.jpg"));BufferedOutputStream bos = new BufferedOutputStream(socket.getOutputStream());byte[] bytes = new byte[1024];int len;while ((len = bis.read(bytes)) != -1){bos.write(bytes,0,len);}//往服务器写结束标记socket.shutdownOutput();//接收服务器返回的数据BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));String line = br.readLine();System.out.println(line);socket.close();}
}

2、服务端代码

package com.heima;import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.UUID;public class Server {public static void main(String[] args) throws IOException {ServerSocket serverSocket = new ServerSocket(10000);//等待客户端来连接Socket socket = serverSocket.accept();//读取客户端上传的文件并保存到本地BufferedInputStream bis = new BufferedInputStream(socket.getInputStream());String name = UUID.randomUUID().toString().replace("-", "");BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("G:\\wjkwk\\serverdir\\"+name+".jpg"));int len;byte[] bytes = new byte[1024];while ((len = bis.read(bytes)) != -1){bos.write(bytes,0,len);}//回写数据BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));bw.write("上传成功");bw.newLine();bw.flush();//释放资源socket.close();serverSocket.close();}
}

3、运行结果