Tcp文件上傳

服務器端:

package TCPUploadFile;

import java.io.DataInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;

/**
 * Created by Administrator on 2016/8/17.
 */
public class UploadServer {
    public static void main(String[] args) {
        try {
            ServerSocket serverSocket=new ServerSocket(10000);
            Socket accept;
            while ((accept=serverSocket.accept())!=null){
                InputStream inputStream = accept.getInputStream();
                DataInputStream dataInputStream = new DataInputStream(inputStream);
                String filename = dataInputStream.readUTF();
                long filesize = dataInputStream.readLong();
                FileOutputStream fileOutputStream = new FileOutputStream(filename);   //上傳到工程根目錄
                byte[] bytes = new byte[10240];
                int len;
                while (filesize>0){
                    len=dataInputStream.read(bytes);
                    fileOutputStream.write(bytes,0, (int) Math.min(filesize,len));
                    //由於inputStream爲一個阻塞的輸入流,一直有東西輸入進來,或者等待輸入,所以文件的最後可能會讀多了,最後根據文件大小讀取
                    filesize=filesize-len;
                }
                accept.close();
                fileOutputStream.close();
                System.out.println("文件接收完畢");

            }




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

客戶端

package TCPUploadFile;

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

/**
 * Created by Administrator on 2016/8/17.
 */
public class UploadClient {
    public static void main(String[] args) {
        try {
            Socket socket = new Socket("127.0.0.1", 10000);  //設置接受服務器的ip和端口
            File file = new File("D:\\test.mp4");
            OutputStream outputStream = socket.getOutputStream();
            DataOutputStream dataOutputStream = new DataOutputStream(outputStream);
            dataOutputStream.writeUTF(file.getName());
            dataOutputStream.writeLong(file.length());
            FileInputStream fileInputStream = new FileInputStream(file);
            byte[] bytes = new byte[102400];
            int length=0;
            while ((length=fileInputStream.read(bytes))!=-1){
                dataOutputStream.write(bytes,0,length);
            }
            System.out.println("文件上傳完畢");

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