通过Socket实现文件传输(Java)

Java文件传输示例

最新推荐文章于 2022-04-19 11:11:59 发布

最新推荐文章于 2022-04-19 11:11:59 发布 · 124 阅读

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#java

这个简单的例子将演示应用Java实现客户端与服务器端传输文件的方法。

服务器端源代码：

 
   01.
   import java.net.*;  
  
   02.
   import java.io.*;  
  
   03.
    
   04.
   public class FileServer {  
  
   05.
   public static void main (String [] args ) throws IOException {  
  
   06.
   // create socket  
  
   07.
   ServerSocket servsock = new ServerSocket(13267);  
  
   08.
   while (true) {  
  
   09.
   System.out.println("Waiting...");  
  
   10.
    
   11.
   Socket sock = servsock.accept();  
  
   12.
   System.out.println("Accepted connection : " + sock);  
  
   13.
    
   14.
   // sendfile  
  
   15.
   File myFile = new File ("source.pdf");  
  
   16.
   byte [] mybytearray = new byte [(int)myFile.length()];  
  
   17.
   FileInputStream fis = new FileInputStream(myFile);  
  
   18.
   BufferedInputStream bis = new BufferedInputStream(fis);  
  
   19.
   bis.read(mybytearray,0,mybytearray.length);  
  
   20.
   OutputStream os = sock.getOutputStream();  
  
   21.
   System.out.println("Sending...");  
  
   22.
   os.write(mybytearray,0,mybytearray.length);  
  
   23.
   os.flush();  
  
   24.
   sock.close();  
  
   25.
   }  
  
   26.
   }  
  
   27.
   }

客户端源代码：

 
   01.
   import java.net.*;  
  
   02.
   import java.io.*;  
  
   03.
    
   04.
   public class FileClient{  
  
   05.
   public static void main (String [] args ) throws IOException {  
  
   06.
   int filesize=6022386; // filesize temporary hardcoded  
  
   07.
    
   08.
   long start = System.currentTimeMillis();  
  
   09.
   int bytesRead;  
  
   10.
   int current = 0;  
  
   11.
   // localhost for testing  
  
   12.
   Socket sock = new Socket("127.0.0.1",13267);  
  
   13.
   System.out.println("Connecting...");  
  
   14.
    
   15.
   // receive file  
  
   16.
   byte [] mybytearray = new byte [filesize];  
  
   17.
   InputStream is = sock.getInputStream();  
  
   18.
   FileOutputStream fos = new FileOutputStream("source-copy.pdf");  
  
   19.
   BufferedOutputStream bos = new BufferedOutputStream(fos);  
  
   20.
   bytesRead = is.read(mybytearray,0,mybytearray.length);  
  
   21.
   current = bytesRead;  
  
   22.
    
   23.
   // thanks to A. Cádiz for the bug fix  
  
   24.
   do {  
  
   25.
   bytesRead =  
  
   26.
   is.read(mybytearray, current, (mybytearray.length-current));  
  
   27.
   if(bytesRead >= 0) current += bytesRead;  
  
   28.
   } while(bytesRead > -1);  
  
   29.
    
   30.
   bos.write(mybytearray, 0 , current);  
  
   31.
   bos.flush();  
  
   32.
   long end = System.currentTimeMillis();  
  
   33.
   System.out.println(end-start);  
  
   34.
   bos.close();  
  
   35.
   sock.close();  
  
   36.
   }  
  
   37.
   }