java实现文件传输

在windows下装了个linux虚拟机,两者之间传输文件挺麻烦的.写了个简单的文件传输程序,来方便自己数据传送.

server 端:

 

import  java.io.BufferedReader;
import  java.io.BufferedWriter;
import  java.io.File;
import  java.io.FileOutputStream;
import  java.io.InputStream;
import  java.io.InputStreamReader;
import  java.io.OutputStreamWriter;
import  java.io.PrintWriter;
import  java.net.ServerSocket;
import  java.net.Socket;

class  CPThread  extends  Thread {
    Socket socket 
= null;
    
public CPThread(Socket socket){
        
this.socket = socket;
    }

    
public void run(){
        
try{
            InputStream in 
= 
                      socket.getInputStream();
            PrintWriter out 
= 
                  
new PrintWriter(
                    
new BufferedWriter(
                      
new OutputStreamWriter(
                        socket.getOutputStream())),
true);
            
            
while(true)
            
{
                
//第一个参数为命令
                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("exit".equals(cmds)){
                    System.exit(
0);
                }

                
else if("cp".equals(cmds)){
                    
byte[] filename = new byte[256];
                    b 
= 0;
                    
while(b<filename.length){
                        b 
+= in.read(filename, b, filename.length-b);
                    }

                    ends 
= 0;
                    
for(int i=0;i<filename.length;i++){
                        
if(filename[i]=='-0'){
                            ends 
= i;
                            
break;
                        }

                    }

                    String filenames 
= new String(filename,0,ends);
                    File fileout 
= new File(filenames);
                    
if(fileout.isFile()){
                        
throw new Exception("file exists"+fileout.getAbsolutePath());
                    }

                    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];
                    
//InputStream ins = socket.getInputStream();
                    while(true){
                        
if(ta==0){
                            
break;
                        }

                        
int len = ta;
                        
if(len>buf.length){
                            len 
= buf.length;
                        }

                        
int rlen = in.read(buf, 0, len);
                        
                        
//int rlen = ins.read(buf, 0, len);
                        ta -= rlen;
                        
if(rlen>0){
                            fos.write(buf,
0,rlen);
                            fos.flush();
                        }

                        
else{
                            
break;
                        }

                    }

                    out.println(
"cp finish!");
                    fos.close();
                    
break;
                }

                
else{
                    System.out.println(
"err command!");
                    out.println(
"err command!");
                    
break;
                }

            }

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

    }

}

public   class  JCPServer  {

    
/**
     * 
@param args
     
*/

    
public static void main(String[] args) throws Exception {
        
// TODO Auto-generated method stub
        int num = args.length;
        
if(num<=0){
            System.out.println(
"please input server port!");
            System.exit(
0);
        }

        
int port = Integer.parseInt(args[0]);
        System.out.println(
"you input port:"+port);
        
//绑定接受数据端口
        ServerSocket s = new ServerSocket(port);
        
while(true){
            Socket socket 
= s.accept();
            
new CPThread(socket).start();
        }

    }


}

 

client 端

 

import  java.io.BufferedWriter;
import  java.io.File;
import  java.io.FileInputStream;
import  java.io.OutputStream;
import  java.io.OutputStreamWriter;
import  java.io.PrintWriter;
import  java.net.InetAddress;
import  java.net.Socket;


public   class  JCPClient  {

    
/**
     * 
@param args
     
*/

    
public static void main(String[] args)throws Exception {
        
// TODO Auto-generated method stub
        int num = args.length;
        
if(num<=3){
            System.out.println(
"please input server ip port filefrom fileto!");
            System.exit(
0);
        }

        System.out.println(
"host:"+args[0]);
        System.out.println(
"port:"+args[1]);
        System.out.println(
"filefrom:"+args[2]);
        System.out.println(
"fileto:"+args[3]);
        InetAddress addr 
= InetAddress.getByName(args[0]);
        Socket socket 
= 
              
new Socket(addr, Integer.parseInt(args[1]));
        OutputStream out 
= socket.getOutputStream();
        
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';
        out.write(cmd,
0,cmd.length);
        
//文件名
        byte[] file = new byte[256];
        
byte[] tfile = args[3].getBytes();
        
for(int i=0;i<tfile.length;i++){
            file[i] 
= tfile[i];
        }

        file[tfile.length] 
= '-0';
        out.write(file,
0,file.length);
        
        
//大小
        File filein = new File(args[2]);
        
byte[] size = new byte[64];
        
byte[] tsize = (""+filein.length()).getBytes();
        
        
for(int i=0;i<tsize.length;i++){
            size[i] 
= tsize[i];
        }

        size[tsize.length] 
= '-0';
        out.write(size,
0,size.length);
        
        FileInputStream fis 
= null;
        
byte[] buf = new byte[1024*10];
        
//char[] bufC = new char[1024*10];
        fis = new FileInputStream(filein);
        
int readsize = 0;
        
//OutputStream ops = socket.getOutputStream();
        while((readsize = fis.read(buf, 0, buf.length))>0){
            out.write(buf,
0,readsize);
            out.flush();
        }

        socket.close();
    }


}

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