Java 網路編程之 （基於 TCP 的遠端檔案傳輸）

伺服器端：

 

import java.io.BufferedInputStream;<br />import java.io.BufferedOutputStream;<br />import java.io.FileOutputStream;<br />import java.net.ServerSocket;<br />import java.net.Socket;<br />//使用TCP協議寫一個可以上傳檔案的伺服器和用戶端。<br />public class UpLoad {<br />public static void main(String[] args) throws Exception {<br />ServerSocket ss = new ServerSocket(3000);<br />Socket socket = ss.accept();<br />new Thread(new Receive(socket)) {<br />}.start();<br />}<br />}<br />class Receive implements Runnable {<br />private Socket socket;<br />public Receive(Socket socket) {<br />this.socket = socket;<br />}<br />public void run() {<br />try {<br />BufferedInputStream bis = new BufferedInputStream(socket<br />.getInputStream());<br />byte[] bFileName = new byte[255];<br />int len = bis.read(bFileName);<br />String fileName = new String(bFileName, 0, len).trim();<br />byte[] bytes = new byte[1024];<br />FileOutputStream fos = new FileOutputStream("d://" + fileName);<br />BufferedOutputStream bos = new BufferedOutputStream(fos);<br />len = 0;<br />while ((len = bis.read(bytes)) != -1) {<br />bos.write(bytes, 0, len);<br />}<br />bos.close();<br />fos.close();<br />bis.close();<br />socket.close();<br />} catch (Exception e) {<br />e.printStackTrace();<br />}<br />}<br />}<br />

 

 

用戶端：

 

 

import java.io.BufferedOutputStream;<br />public class UpLoadClient {<br />public static void main(String[] args) throws Exception {<br />BufferedReader br = null;<br />String path = null;<br />String fileName = null;<br />String ip = null;<br />while (true) {<br />System.out.println("請輸入檔案路徑：");<br />br = new BufferedReader(new InputStreamReader(System.in));<br />path = br.readLine();<br />File file = new File(path);<br />fileName = path.substring(path.lastIndexOf("//") + 1);<br />if (file.isDirectory() || !file.exists())<br />System.out.println("路徑不正確！");<br />else<br />break;<br />}<br />System.out.println("請輸入伺服器位址：");<br />br = new BufferedReader(new InputStreamReader(System.in));<br />ip = br.readLine();<br />System.out.println("確認上傳：" + path + "檔案嗎（y/n）？");<br />br = new BufferedReader(new InputStreamReader(System.in));<br />String result = br.readLine();<br />if ("n".equalsIgnoreCase(result)) {<br />br.close();<br />return;<br />}<br />Socket socket = new Socket(ip, 3000);<br />FileInputStream fs = new FileInputStream(path);<br />byte[] bytes = new byte[1024];<br />BufferedOutputStream bos = new BufferedOutputStream(socket<br />.getOutputStream());<br />while (true) {<br />if (fileName.getBytes().length < 255)<br />fileName += "/u0000";<br />else<br />break;<br />}<br />bos.write(fileName.getBytes());<br />bos.flush();<br />int len = 0;<br />while ((len = fs.read(bytes)) != -1) {<br />bos.write(bytes, 0, len);<br />}<br />bos.close();<br />fs.close();<br />br.close();<br />socket.close();<br />System.out.println("檔案上傳完畢！");<br />}<br />}<br />