Java BIO实现任意类型文件上传_java任意文件上传数据包

Client端实现

package com.picture;

import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.Socket;

public class Client {
    public static void main(String[] args) {
        try {
            Socket socket = new Socket("127.0.0.1",5555);
            DataOutputStream dos = new DataOutputStream(socket.getOutputStream());
            dos.writeUTF(".png");
            FileInputStream fis = new FileInputStream("C:\\Users\\曹玉琦\\Desktop\\PIC\\NIO.png");
            byte[] Buffer = new byte[1024];
            int len;
            while ((len = fis.read(Buffer))>0)
            {
                dos.write(Buffer,0,len);
                dos.flush();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

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这里我们使用DataOutputStream 来进行数据传输，我们先写入图片的格式“.png”再新FileInputStream，路径为我们要上传的目录。接着我们要新建一个字节数组，每次从输入流读取一个字节，然后写入输出流

Server端

package com.picture;

import java.io.DataInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.util.UUID;

public class RunnableLoadPic implements Runnable{
    private Socket socket;

    public RunnableLoadPic(Socket socket) {
        this.socket = socket;
    }

    @Override
    public void run() {
        try {
            DataInputStream dis = new DataInputStream(socket.getInputStream());
            String suffix = dis.readUTF();
            FileOutputStream fos = new FileOutputStream("C:\\Users\\曹玉琦\\Desktop\\新建文件夹 (2)\\" + UUID.randomUUID().toString() + suffix);
            byte[] buffer = new byte[1024];
            int len;
            while ((len = dis.read(buffer))>0)
            {
                fos.write(buffer,0,len);

            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

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