简易下载程序

import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.io.PrintWriter; import java.net.ServerSocket; import java.net.Socket; public class DownLoadServer { File root = new File("d:/txt"); public void action() throws Exception { System.out.println("----------Server----------"); ServerSocket ss = new ServerSocket(8000); while (true) { Socket socket = ss.accept(); InnerThread t = new InnerThread(socket); t.start(); } } class InnerThread extends Thread { Socket socket; public InnerThread(Socket socket) { this.socket = socket; } public void run() { try { String yn = "n"; File[] files = root.listFiles(); PrintWriter pw = new PrintWriter(new OutputStreamWriter(socket .getOutputStream())); BufferedReader br = new BufferedReader(new InputStreamReader( socket.getInputStream())); BufferedOutputStream bos = new BufferedOutputStream(socket .getOutputStream()); do { System.out.println("----------"); System.out .println("socket" + socket.getReceiveBufferSize()); StringBuilder buffer = new StringBuilder(); for (int i = 0; i < files.length; i++) { buffer.append( i + ", " + files[i].getName() + ", " + files[i].length()).append("@@@"); } pw.println(buffer.toString()); pw.flush(); String numStr = br.readLine(); File downloadFile = files[Integer.parseInt(numStr)]; pw.println(downloadFile.getName() + "_" + downloadFile.length()); pw.flush(); BufferedInputStream bis = new BufferedInputStream( new FileInputStream(downloadFile)); int b = -1; while ((b = bis.read()) != -1) { bos.write(b); } bos.flush(); socket.getOutputStream().flush(); bis.close(); yn = br.readLine(); System.out.println(yn); } while ("y".equals(yn)); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } } public static void main(String[] args) throws Exception { DownLoadServer server = new DownLoadServer(); server.action(); } }
import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.BufferedReader; import java.io.File; import java.io.FileOutputStream; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.io.PrintWriter; import java.net.Socket; public class DownLoadClient { public void action() throws Exception { System.out.println("----------Client----------"); Socket socket = new Socket("localhost",8000); String yn = "n"; BufferedReader br = new BufferedReader(new InputStreamReader(socket .getInputStream())); BufferedInputStream bis = new BufferedInputStream(socket .getInputStream()); PrintWriter pw = new PrintWriter(new OutputStreamWriter(socket .getOutputStream())); BufferedReader console = new BufferedReader(new InputStreamReader( System.in)); do { String line = br.readLine(); String[] filesInfo = line.split("@@@"); for (int i = 0; i < filesInfo.length; i++) { System.out.println(filesInfo[i]); } String numStr = console.readLine(); pw.println(numStr); pw.flush(); String info = br.readLine(); String fileName = info.substring(0,info.lastIndexOf("_")); long len = Long.parseLong(info.substring(info.lastIndexOf("_")+1)); System.out.println(fileName); BufferedOutputStream bos = new BufferedOutputStream( new FileOutputStream(new File("d:/" + System.currentTimeMillis() + "_" + fileName + ".txt"))); System.out.println(len); for(int i=0;i<len;i++){ bos.write(bis.read()); } bos.flush(); bos.close(); yn = console.readLine(); pw.println(yn); pw.flush(); } while ("y".equalsIgnoreCase(yn)); socket.close(); } public static void main(String[] args) throws Exception { DownLoadClient client = new DownLoadClient(); client.action(); } }