TCP之文件上传与下载

Posted 2020-12-06 kuris101

TCP文件上传下载

客户端

1. 创建socket连接
2. 创建输出流
3. 读取文件
4. 写出文件
5. 关闭资源

import java.io.File;
import java.io.FileInputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;

public class TCPClientFile {
    public static void main(String[] args) throws Exception{
        //1.创建socket连接
        Socket socket = new Socket(InetAddress.getByName("127.0.0.1"),9000);
        //2.创建输出流
        OutputStream os = socket.getOutputStream();
        //3.读取文件
        FileInputStream fileInputStream = new FileInputStream(new File("D:\Code\JavaStudy\src\zhengjianzhao.jpg"));
        //4.写出文件
        byte[] buffer = new byte[1024];
        int len;
        while((len=fileInputStream.read(buffer))!=-1){
            os.write(buffer,0,len);
        }
        //5.关闭资源
        fileInputStream.close();
        os.close();
        socket.close();

    }
}

服务端

1. 创建服务
2. 等待连接
3. 获取输入流
4. 文件输出
5. 关闭资源

import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.io.File;

public class TCPServerFile {
    public static void main(String[] args) throws Exception{
        //1.创建服务
        ServerSocket serverSocket = new ServerSocket(9000);
        //2.等待连接
        Socket socket = serverSocket.accept();
        //3.获取输入流
        InputStream is = socket.getInputStream();
        //4.文件输出
        FileOutputStream fos = new FileOutputStream(new File("receive.jpg"));
        byte[] buffer = new byte[1024];
        int len;
        while((len=is.read(buffer))!=-1){
            fos.write(buffer,0,len);
        }
        //5.关闭资源
        fos.close();
        is.close();
        socket.close();
        serverSocket.close();
    }
}

执行结果：服务端接受到客户端发送的文件