java文件传输

文件接收部分

FileReceiver.java

package com.vista.Util;

import java.io.IOException;
import java.net.ServerSocket;

public   class  FileReceiver  extends Thread
{
     private  ServerSocket s  =   null ;    
     private   int  FILE_PORT ; // 文件传输的监听端口
     private  User user  =   null ;
     public   FileReceiver(User us)
    {
         this .FILE_PORT  =  us.getUdpPort(); // 设置文件端口
         this .user = us;
    }
     public   void  run()
    {
         try
        {
            s  =   new  ServerSocket(FILE_PORT);
            System. out .println( " 用户端开始监听: " + s);
             while ( true )
                {
                java.net.Socket  socket  =  s.accept();
                System. out .println( " 连接接受 " + socket);
                 new  FileReceiverThread(user,socket);
            }
        }
         catch (IOException e)
        {
            e.printStackTrace();
        }
         catch (java.lang.Exception ex)
        {
            System.err.println(ex.getMessage().toString());
            ex.printStackTrace();
        }
         finally
        {
             try  
            {
                s.close();
            } 
             catch  (IOException e) 
            {
                 //  TODO Auto-generated catch block
                e.printStackTrace();
            }
        }    
    }

}

FileReceiverThread.java
package com.vista.Util;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Date;

import com.vista.Form.SingleChatForm;

public   class  FileReceiverThread extends Thread
{
     private  SingleChatForm chatForm  =   null ;
     private  java.net.Socket socket  =   null ;
     private  java.io.InputStream  in   =   null ; // 从客户端读数据的
     private  java.io.PrintWriter  out   =   null ; // 向客户端写数据
     private  String serverMsg;
     private  User sender  = null ;
     private  User receiver  = null ;
     private  com.vista.Util.Sender MsgSender  =   null ;
    

     public  FileReceiverThread (User us,Socket socket)
    {
         this .receiver = us;
             try  
            {
                 this .socket  =  socket;
             this . in   =   this .socket.getInputStream();
                 this . out   =   new  PrintWriter( new  BufferedWriter( new  OutputStreamWriter( this .socket.getOutputStream())), true );
            } 
             catch  (IOException e) 
            { //  TODO Auto-generated catch block
                e.printStackTrace();
            }
             this .start(); // 启动线程
    }

     public   void  run()
    {
         String info   =   "" ;
         try
        {      
             while ( true )   
            {   
                 // 第一个参数为命令   
                Date befor  =   new  Date();
                
     
                 byte  cmd[]  =   new   byte [ 128 ];   
                 int  b  =   0 ;   
                 while (b < cmd.length)
                { 
                    b  +=   in .read(cmd, b, cmd.length - b);   
                }   
                 int  ends  =   0 ;   
                 for ( int  i = 0 ;i < cmd.length;i ++ )
                {
                     if (cmd[i] ==- 0 )
                    {   
                        ends  =  i;   
                         break ;   
                    }   
                }   
                String cmds  =   new  String(cmd, 0 ,ends);   
                 if ( " cp " .equals(cmds))
                {   
                     byte [] filename  =   new   byte [ 256 ];   
                    b  =   0 ;   
                     while (b < cmd.length)
                    { 
                        b  +=   in .read(filename, b, filename.length - b);   
                    }   
                    ends  =   0 ;   
                     for ( int  i = 0 ;i < cmd.length;i ++ )
                    { 
                         if (filename[i] ==- 0 )
                        {   
                            ends  =  i;   
                             break ;   
                        }   
                    }   
                    String filenames  =   new  String(filename, 0 ,ends);
                    filenames  =   " F:// " + filenames;
                    
                    File fileout  =   new  File(filenames);   

                    
                    FileOutputStream fos  =   new  FileOutputStream(fileout);   
                       
                     byte [] filesize  =   new   byte [ 64 ];   
                    b  =   0 ;   
                     while (b < filesize.length)
                    { 
                        b  +=   in .read(filesize, b, filesize.length - b);   
                    }   
                       
                    ends  =   0 ;   
                     for ( int  i = 0 ;i < filesize.length;i ++ )
                    {
                         if (filesize[i] ==- 0 )
                        {   
                            ends  =  i;   
                             break ;   
                        }   
                    }   
                    String filesizes  =   new  String(filesize, 0 ,ends);   
                       
                    System. out .println( " filesize: " + filesizes);   
                     int  ta  =  Integer.parseInt(filesizes);   
                     byte [] buf  =   new   byte [ 1024 * 10 ];   
 
                     while ( true )
                    {   
                         if (ta == 0 )
                        {   
                             break ;   
                        }   
                         int  len  =  ta;   
                         if (len > buf.length)
                        {   
                            len  =  buf.length;   
                        }   
                         int  rlen  =   in .read(buf,  0 , len);   

                        ta  -=  rlen;   
                         if (rlen > 0 )
                        {   
                            fos.write(buf, 0 ,rlen);   
                            fos.flush();   
                        }   
                         else
                        {   
                             break ;   
                        }   
                    }   
                    Date after  =   new  Date();
                     long  diff  = after.getTime()  -  befor.getTime();
                    diff  /= 1000 ;

                   info  =   " 传输完成!文件已经保存到: " + filenames + " ,文件大小： " + filesizes + " 字节, " + " 共用时间: " + diff + " 秒 " ;
                    int  result  =  javax.swing.JOptionPane.showConfirmDialog( null , info,  " 文件传输 " ,  javax.swing.JOptionPane.YES_NO_OPTION, javax.swing.JOptionPane.INFORMATION_MESSAGE);
                
                   fos.close(); 
                    break ;   
                }   
            }   
             // socket.close();   
            }
         catch (Exception e)
        {
            e.printStackTrace();   
        }   
           try  
            {
                 this .socket.close();
            } 
             catch  (IOException ex1)
            {
            }
             
    }
}

文件发送线程

FileSender.java
package com.vista.Util;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

public   class  FileSender extends Thread
{
     private  Socket socket  =   null ; // 客户端socket
     private  OutputStream  out   =   null ; // 向服务器写数据
     private   int  RECEIVER_PORT  =   - 1 ; // 接收者端口
   
     private  File fileToSend  =   null ; // 要传输的文件
    
     public  FileSender(File file, int  Receiver_Port)
    {
         this .fileToSend  =  file;
         this .RECEIVER_PORT  =  Receiver_Port; // 设置接收方端口
         try  
        {
             this .socket  =   new  Socket(InetAddress.getLocalHost(),RECEIVER_PORT);
             out   =  socket.getOutputStream(); // 向接收者发数据的
        } 
         catch  (UnknownHostException e) 
        {
             //  TODO Auto-generated catch block
            e.printStackTrace();
        } 
         catch  (IOException e) 
        {
             //  TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

     public   void  run()
    {
         byte [] cmd  =   new   byte [ 128 ];
         byte [] tcmd  =   " cp " .getBytes();
         for ( int  i = 0 ;i < tcmd.length;i ++ )
        {
            cmd[i]  =  tcmd[i];   
        }   
        cmd[tcmd.length]  =   - 0 ;   
         try  
        {
             out .write(cmd, 0 ,cmd.length);
        } 
         catch  (IOException e)
        {
            e.printStackTrace();
        }   
          // 文件名   
         byte [] file  =   new   byte [ 256 ];   
         byte [] tfile  =   this .fileToSend.getName().getBytes();   
         for ( int  i = 0 ;i < tfile.length;i ++ )
        {
            file[i]  =  tfile[i];   
        }   
        file[tfile.length]  =   - 0 ;   
         try  
        {
             out .write(file, 0 ,file.length);
        } 
         catch  (IOException e) 
        {
            e.printStackTrace();
        }          
          // 大小      
         byte [] size  =   new   byte [ 64 ];   
         byte [] tsize  =  ( "" + this .fileToSend.length()).getBytes();   
           
         for ( int  i = 0 ;i < tsize.length;i ++ )
        { 
            size[i]  =  tsize[i];   
        }   
           
        size[tsize.length]  =   - 0 ;   
         try  
        {
             out .write(size, 0 ,size.length);
        } 
         catch  (IOException e) 
        {
             //  TODO Auto-generated catch block
            e.printStackTrace();
        }   
           
        FileInputStream fis  =   null ;   
         byte [] buf  =   new   byte [ 1024 * 10 ];    
         try  
        {
            fis  =   new  FileInputStream( this .fileToSend);
        } 
         catch  (FileNotFoundException e) 
        {
            e.printStackTrace();
        }   
         int  readsize  =   0 ;    
          try  
         {
             while ((readsize  =  fis.read(buf,  0 , buf.length)) > 0 )
            {   
                 out .write(buf, 0 ,readsize);   
                 out .flush();  
            }
        } 
         catch  (IOException e)
        {
            e.printStackTrace();
        }   

    }

}