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("\t正在校验 " + file.getName() + "文件MD5请稍后...\n");
			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]\n");
			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("\t\t数据传输中...\n");
				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();
		}
	}
}