一个简单的FTP客户端 实现上传下载

packagepub.ftp;

importjava.io.BufferedReader;
importjava.io.DataOutputStream;
importjava.io.File;
importjava.io.FileInputStream;
importjava.io.FileOutputStream;
importjava.io.IOException;
importjava.io.InputStreamReader;
importjava.util.ArrayList;

importsun.net.TelnetInputStream;
importsun.net.TelnetOutputStream;
importsun.net.ftp.FtpClient;

/***//**
*FTPClient端调用模块
*作者：
*版本：1.0
*时间：2007.07.30
*/

publicclassFTPClient...{
/***//**
*类的初始化，建立ftp的连接，用户登录，指定ftp的传输流
*@paramhost
*@paramport
*@paramuser
*@parampsw
*/
//建立一条与指定主机、指定端口上的FTP服务器的连接
privateFtpClientaftp=newFtpClient();;
privateDataOutputStreamoutputs;
privateTelnetOutputStreamouts;
privateTelnetInputStreaminps;


publicvoidFTPClass(Stringhost,intport,Stringuser,Stringpsw)...{

try...{


//注册到FTP服务器
aftp.openServer(host);
System.out.println("登陆....");
aftp.login(user,psw);

System.out.println("登陆FTP服务器成功！");
aftp.binary();

}catch(IOExceptione)...{

System.out.println("连接FTP服务器失败！");
e.printStackTrace();
}


}
/***//**
*通过ftp上传文件到服务器上
*@paramlocalFile本地所要上传的文件
*@paramremoteFile传到服务器上的文件名称
*/
publicbooleanupFile(StringlocalFile,StringremoteFile)...{
booleanresult=true;
if(aftp!=null)...{
System.out.println("正在上传文件"+localFile+",请等待....");
try...{
Filefile=newFile(localFile);
outs=aftp.put(remoteFile);
FileInputStreamin=newFileInputStream(file);
byte[]bytes=newbyte[1024];
intc;
while((c=in.read(bytes))!=-1)...{
outs.write(bytes,0,c);
}
outs.close();
in.close();
System.out.println("上传文件"+localFile+"成功！");
System.out.println("上传文件所在目录："+remoteFile+"");
}catch(Exceptione)...{
e.printStackTrace();
System.out.println("上传文件"+localFile+"失败！");
result=false;
}

}else...{
result=false;
}
returnresult;
}
/***//**
*下载FTP服务器上的文件
*@paramlocalFile本地文件名
*@paramremoteFile远程服务器文件名
*/
publicbooleandownFile(StringremoteFile,StringlocalFile)...{
booleanresult=true;
if(aftp!=null)...{
System.out.println("正在下载文件"+remoteFile+"，请等待....");
try...{
Filefile=newFile(remoteFile);
inps=aftp.get(remoteFile);
aftp.cd("D;/jiadong");
FileInputStreamin=newFileInputStream(file);
//RandomAccessFilegetFile=newRandomAccessFile(file,"rw");
//getFile.seek(0);
FileOutputStreamos=newFileOutputStream(file);

byte[]bytes=newbyte[1024];
intc;
while((c=in.read(bytes))!=-1)...{
//.write(bytes,0,c);
os.write(bytes,0,c);

}
inps.close();
in.close();
os.close();
System.out.println("下载文件"+remoteFile+"成功！");
System.out.println("上传文件所在目录："+localFile+"");
}catch(Exceptione)...{
e.printStackTrace();
System.out.println("下载文件"+remoteFile+"失败！");
result=false;
}
}
returnfalse;
}
/***//**
*断开ftp连接
*@throwsIOException
*
*/
publicvoiddisconnect()throwsIOException...{
aftp.closeServer();
System.out.println("FTP服务器连接断开！");
}
//返回当前目录的所有文件及文件夹

publicArrayListgetFileList()throwsIOException...{
BufferedReaderdr=newBufferedReader(newInputStreamReader(aftp.list()));
ArrayListal=newArrayList();
Strings="";
while((s=dr.readLine())!=null)...{
al.add(s);
}
returnal;
}

publicstaticvoidmain(String[]args)throwsIOException...{
FTPClientftpClient=newFTPClient();
ftpClient.FTPClass("192.168.8.154",21,"jiadong","jiadong");
//ftpClient.upFile("F:/music/想念.mp3","/jia/hehe.mp3");

//ftpClient.upFile("d:/jiadong","D:/workspace/msgfield.xml");
ftpClient.downFile("hehe.xml","/jia/ruru.xml");
ftpClient.disconnect();


}
}