ftpclient.java

Java的ftp实现 包含客户端和服务器端

/**
*  文件传输
*  @aurth anyx
*/
//package per.anyx.ftp;

import java.net.*;
import java.io.*;

public class FtpClient{
    public static void main(String[] args){
	if(args.length != 3){
	    System.out.println("Usage: FtpClient host_add host_port src_file");
	    System.exit(0);
	}
	File file = new File(args[2]);
	if(!file.exists() || !file.isFile()){
	    System.out.println("File \"" + args[2] + "\" does not exist or is not a normal file.");
	    System.exit(0);
	}
	Socket s = null;
	FileInputStream in = null;
	OutputStream out = null;
	try{
	    s = new Socket(args[0], Integer.parseInt(args[1]));
	    in = new FileInputStream(file);
	    out = s.getOutputStream();

	    byte[] buffer = new byte[1024*8];
	    int len = -1;
	    System.out.println("File tansfer statr...");
	    while((len=in.read(buffer)) != -1){
		out.write(buffer, 0, len);
	    }
	    System.out.println("File tansfer complete...");
	}catch(Exception e){
	    System.out.println("Error: " + e.getMessage());
	    System.exit(1);
	}finally{
	    try{
		if(in != null) in.close();
		if(out != null) out.close();
		if(s != null) s.close();
	    }catch(Exception e){}
	}
    }
}