试试用Socket传文件

非常简单的一个传文件的功能；为多个客户端每天定时分配资料，Timer没有加进去，参考参考!

服务端:

 

package cn.jatula.socket;

import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.net.ServerSocket;
import java.net.Socket;
/**
 * 服务器端
 * @author lake
 *
 */
public class ServerTest {
	int port = 8821;

	void start() {
		Socket s = null;
		try {
			ServerSocket ss = new ServerSocket(port);
			while (true) {
				// 选择进行传输的文件
				String filePath = "C:\\jatula.rar";
				File fi = new File(filePath);

				System.out.println("文件长度:" + (int) fi.length());

				// public Socket accept() throws
				// IOException侦听并接受到此套接字的连接。此方法在进行连接之前一直阻塞。

				s = ss.accept();
				System.out.println("建立socket链接");
				DataInputStream dis = new DataInputStream(
						new BufferedInputStream(s.getInputStream()));
				dis.readByte();

				DataInputStream fis = new DataInputStream(
						new BufferedInputStream(new FileInputStream(filePath)));
				DataOutputStream ps = new DataOutputStream(s.getOutputStream());
				//将文件名及长度传给客户端。这里要真正适用所有平台，例如中文名的处理，还需要加工。
				ps.writeUTF(fi.getName());
				ps.flush();
				ps.writeLong((long) fi.length());
				ps.flush();

				int bufferSize = 8192;
				byte[] buf = new byte[bufferSize];

				while (true) {
					int read = 0;
					if (fis != null) {
						read = fis.read(buf);
					}

					if (read == -1) {
						break;
					}
					ps.write(buf, 0, read);
				}
				ps.flush();
				// 注意关闭socket链接哦，不然客户端会等待server的数据过来，
				// 直到socket超时，导致数据不完整。                
				fis.close();
				s.close();
				System.out.println("文件传输完成");
			}

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

	public static void main(String arg[]) {
		new ServerTest().start();
	}
}

 

 

客户端：

 

package cn.jatula.socket;

import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileOutputStream;
/**
 * 客户端
 * @author lake
 *
 */
public class ClientTest {
	private ClientSocket cs = null;

	private String ip = "localhost";// 设置成服务器IP

	private int port = 8821;

	private String sendMessage = "Windwos";

	public ClientTest() {
		try {
			if (createConnection()) {
				sendMessage();
				getMessage();
			}

		} catch (Exception ex) {
			ex.printStackTrace();
		}
	}

	private boolean createConnection() {
		cs = new ClientSocket(ip, port);
		try {
			cs.CreateConnection();
			System.out.print("连接服务器成功!" + "\n");
			return true;
		} catch (Exception e) {
			System.out.print("连接服务器失败!" + "\n");
			return false;
		}

	}

	private void sendMessage() {
		if (cs == null)
			return;
		try {
			cs.sendMessage(sendMessage);
		} catch (Exception e) {
			System.out.print("发送消息失败!" + "\n");
		}
	}

	private void getMessage() {
		if (cs == null)
			return;
		DataInputStream inputStream = null;
		try {
			inputStream = cs.getMessageStream();
		} catch (Exception e) {
			System.out.print("接收消息缓存错误\n");
			return;
		}

		try {
			// 本地保存路径，文件名会自动从服务器端继承而来。
			String savePath = "E:\\";
			int bufferSize = 8192;
			byte[] buf = new byte[bufferSize];
			int passedlen = 0;
			long len = 0;

			savePath += inputStream.readUTF();
			DataOutputStream fileOut = new DataOutputStream(
					new BufferedOutputStream(new BufferedOutputStream(
							new FileOutputStream(savePath))));
			len = inputStream.readLong();

			System.out.println("文件的长度为:" + len + "\n");
			System.out.println("开始接收文件!" + "\n");

			while (true) {
				int read = 0;
				if (inputStream != null) {
					read = inputStream.read(buf);
				}
				passedlen += read;
				if (read == -1) {
					break;
				}
				// 下面进度条本为图形界面的prograssBar做的，这里如果是打文件，可能会重复打印出一些相同的百分比
				System.out.println("文件接收了" + (passedlen * 100 / len) + "%\n");
				fileOut.write(buf, 0, read);
			}
			System.out.println("接收完成，文件存为" + savePath + "\n");

			fileOut.close();
		} catch (Exception e) {
			System.out.println("接收消息错误" + "\n");
			return;
		}
	}

	public static void main(String arg[]) {
		new ClientTest();
	}
}

 

辅助类

 

package cn.jatula.socket;

import java.net.*;
import java.io.*;
/**
 * socket的Util辅助类
 * @author lake
 *
 */
public class ClientSocket {
	private String ip;

	private int port;

	private Socket socket = null;

	DataOutputStream out = null;

	DataInputStream getMessageStream = null;

	public ClientSocket(String ip, int port) {
		this.ip = ip;
		this.port = port;
	}

	/** */
	/**
	 * 创建socket连接
	 * 
	 * @throws Exception
	 *             exception
	 */
	public void CreateConnection() throws Exception {
		try {
			socket = new Socket(ip, port);
		} catch (Exception e) {
			e.printStackTrace();
			if (socket != null)
				socket.close();
			throw e;
		} finally {
		}
	}

	public void sendMessage(String sendMessage) throws Exception {
		try {
			out = new DataOutputStream(socket.getOutputStream());
			if (sendMessage.equals("Windows")) {
				out.writeByte(0x1);
				out.flush();
				return;
			}
			if (sendMessage.equals("Unix")) {
				out.writeByte(0x2);
				out.flush();
				return;
			}
			if (sendMessage.equals("Linux")) {
				out.writeByte(0x3);
				out.flush();
			} else {
				out.writeUTF(sendMessage);
				out.flush();
			}
		} catch (Exception e) {
			e.printStackTrace();
			if (out != null)
				out.close();
			throw e;
		} finally {
		}
	}

	public DataInputStream getMessageStream() throws Exception {
		try {
			getMessageStream = new DataInputStream(new BufferedInputStream(
					socket.getInputStream()));
			return getMessageStream;
		} catch (Exception e) {
			e.printStackTrace();
			if (getMessageStream != null)
				getMessageStream.close();
			throw e;
		} finally {
		}
	}

	public void shutDownConnection() {
		try {
			if (out != null)
				out.close();
			if (getMessageStream != null)
				getMessageStream.close();
			if (socket != null)
				socket.close();
		} catch (Exception e) {

		}
	}
}

 

评论

5 楼 tan_1208815066 2013-03-18  

传送pdf 的文件 不能正确的 传送

4 楼 bupt_烦人 2010-03-16  

int passedlen ;建议改为long,当长度超过20M的时候会出现越界

3 楼 Jatula 2008-03-18  

快得看不见手，在本地测试的，所以没办法给你答案；

没做过压力测试，哈哈；

2 楼 oklzh 2008-03-17  

无聊，研究研究

1 楼 javaeyename 2008-03-17  

速度怎么样？有没有统计？