TCP实现文件上传

Tcp客户端

步骤

• 得知服务端地址，端口，创建socket连接
• 创建输出流
• 创建文件输入流来读取文件
• 通过输出流将文件写出
• 通知服务端已经传输完毕
• 接收服务端传回的接收完毕信息
• 关闭流

客户端代码：

package com.example.code.netWork.tcpfile;

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

//Tcp客户端
public class TcpUploadFileClient {

    public static void main(String[] args) throws Exception {
        //1.得知服务端地址端口
        Socket socket = new Socket(InetAddress.getByName("127.0.0.1"), 2020);
        //2.创建输出流
        OutputStream outputStream = socket.getOutputStream();
        //3.读取文件
        FileInputStream fStream =
                new FileInputStream(new File("src\\main\\java\\com\\example\\code\\netWork\\tcpfile\\123456.jpeg"));
        //4.将文件写出
        byte[] buffer = new byte[2048];
        int len;
        while ((len = fStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, len);
        }
        //5.通知服务端我已经传完了
        socket.shutdownOutput();
        //6.确定服务端已经接收完毕，断开连接
        InputStream inputStream = socket.getInputStream();
        ByteArrayOutputStream byteOutputStream = new ByteArrayOutputStream();
        byte[] buffer2 = new byte[2048];
        int len2;
        while ((len2 = inputStream.read(buffer2)) != -1) {
            byteOutputStream.write(buffer2, 0, len2);
        }
        System.out.println(byteOutputStream.toString());
        //7.关闭流
        byteOutputStream.close();
        inputStream.close();
        fStream.close();
        outputStream.close();
        socket.close();

    }

}

Tcp客户端

步骤

• 设置服务端端口号
• 监听客户端连接
• 输入流
• 通过文件输出流保存文件
• 接收完毕通知客户端
• 关闭流

客户端代码：

package com.example.code.netWork.tcpfile;

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

//Tcp服务端
public class TcpUploadFileServer {

    public static void main(String[] args) throws Exception {
        //1.设置服务端端口
        ServerSocket socket = new ServerSocket(2020);
        //2.对客户机进行监听
        Socket socket2 = socket.accept();
        //3.获取输入流
        InputStream in = socket2.getInputStream();
        //4.文件输出
        FileOutputStream out = new FileOutputStream(new File("src\\main\\java\\com\\example\\code\\netWork\\tcpfile\\recevier.jpeg"));
        byte[] buffer = new byte[2048];
        int len;
        while ((len = in.read(buffer)) != -1) {
            out.write(buffer, 0, len);
        }
        //5.若接收完毕，通知客户端接收完毕
        OutputStream outputStream = socket2.getOutputStream();
        outputStream.write("我接收完毕！".getBytes());
        //6.关闭流
        outputStream.close();
        out.close();
        in.close();
        socket2.close();
        socket.close();
    }
}