文件秒传

ClientFiles.java

/**
 * 更多资料欢迎浏览凯哥学堂官网：http://kaige123.com
 * @author 小沫
 */
package com.files.mc;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.net.UnknownHostException;

public class ClientFiles extends Thread {

    public void run() {

        try {
            Socket socket = new Socket("127.0.0.1", 8080);
            InputStream fin = socket.getInputStream();
            OutputStream fout = socket.getOutputStream();

            File file = new File("E:/迅雷下载/170322-04.mp4");
            long times = System.currentTimeMillis();
            System.out.println("	正在校验 " + file.getName() + "文件MD5请稍后...
");
            String md5 = MD5FileUtil.getFileMD5String(file);// 把此文件数据进行MD5加密
            System.out.println("[MD5验证完毕  耗时: " + 
            (System.currentTimeMillis() - times) / 1000 + " 秒  正在执行数据传输]
");
            fout.write(md5.getBytes());// 把加密出来的MD5发送到服务端
            fout.flush();

            if (fin.read() == 0) {// 服务端传过来的是0 说明服务端上有相同数据
                // 打印秒传了
                System.out.println("数据传输完毕！大小: " + file.length() + " 字节  耗时: 0秒 ！ 秒传机制");
            } else {
                // 打印的不是0,那么开始把数据传输给服务端
                long time = System.currentTimeMillis();
                System.out.println("		数据传输中...
");
                FileInputStream filein = new FileInputStream(file);
                byte[] b = new byte[1024 * 1024 * 2];
                while (filein.available() != 0) {
                    int len = filein.read(b);
                    fout.write(b, 0, len);
                    fout.flush();
                }
                System.out.println(
                        "文件传输完毕！大小: " + file.length() + " 字节  耗时: " + (System.currentTimeMillis() - time) / 1000 + "秒");
                filein.close();
            }
            fout.close();
            fin.close();
            socket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        new ClientFiles().start();// 启动客户端线程
    }
}

ServerFiles.java

/**
 * 更多资料欢迎浏览凯哥学堂官网：http://kaige123.com
 * @author 小沫
 */
package com.files.mc;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.zip.InflaterOutputStream;

public class ServerFiles implements Runnable {

    private Socket socket;
    public ServerFiles(Socket socket) {
        this.socket = socket;
    }
    public void run() {
        try {
            InputStream fin = socket.getInputStream();
            OutputStream fout = socket.getOutputStream();

            byte[] b = new byte[1024];
            int len = 0;
            len = fin.read(b);
            String md5 = new String(b, 0, len);//接收客户端传的MD5
            System.out.println(md5);
            File file = new File("filess");
            File[] files = file.listFiles();
            boolean state = false;//状态默认为false 用来判断MD5是否存在
            for (File file2 : files) {
                //如果找到了相同的MD5
                if (file2.getName().equalsIgnoreCase(md5)) {
                    state = true;//状态就改为true 表示有相同的MD5
                    break;
                }
            }
            if (state == false) {
                //没有找到相同的MD5 就给客户端发送1过去 让客户端开始把数据发过来
                fout.write(1);
                fout.flush();

                FileOutputStream fileout = new FileOutputStream(new File("filess", md5));
                byte[] b1 = new byte[1024 * 1024 * 2];

                //把客户端发来的数据存储到文件中
                while ((len = fin.read(b)) != -1) {
                    fileout.write(b1, 0, len);
                }
                 fileout.close();
            } else {
                //如果找到了相同的MD5那么发送0给客户端 
                fout.write(0);
                fout.flush();
            }
            fout.close();
            fin.close();
            socket.close();

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

    public static void openServer() throws Exception {
        ServerSocket server = new ServerSocket(8080);
        ExecutorService executor = Executors.newFixedThreadPool(10);//线程池
        while (true) {
            ServerFiles socket = new ServerFiles(server.accept());
            executor.execute(socket);
        }
    }

    public static void main(String[] args) {
        try {
            openServer();//启动服务端
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

​