//文件上傳
public static boolean uploadToFTP(String url,int port,String username,String password,String path,String filename,InputStream input)
{
boolean success=false;
FTPClient ftp=new FTPClient();//org.apache.commons.net.ftp
try{
if(port>-1)
{
ftp.connect(url,port);
}else{
ftp.connect(url);//ftp默認的端口是21
}
//很多人寫的是用ftp.getReplyCode()給獲取連接的返回值,但是這樣會導致storeFileStream返回null
if(ftp.login(username,password))
{
ftp.enterLocalActiveMode();
ftp.setFileType(FTPClient.BINARY_FILE_TYPE);
//創建目錄,如果存在會返回失敗
ftp.makeDirectory(path);
//切換目錄
ftp.changeWorkingDirectory(path);
//上傳文件
//FTP協議規定文件編碼格式為ISO-8859-1
filename=new String(filename.getBytes("GBK"),"ISO-8859-1");
OutputStream out=ftp.storeFileStream(filename);
byte[]byteArray=new byte[4096];
int read=0;
while((read=input.read(byteArray))!=-1)
{
out.write(byteArray,0,read);
}
out.close();
ftp.logout();
sucess=true;
}
}
catch(Exception e)
{
}
finally{
if(ftp.isConnected())
{
ftp.disConnecct();
}
}
}
//文件下載
public static boolean downloadFromFTP(String url,int port,String username,String password,String path,String localpath)
{
boolean success=false;
FTPClient ftp=new FTPClient();//org.apache.commons.net.ftp
try{
int reply;
if(port>-1)
{
ftp.connect(url,port);
}else{
ftp.connect(url);//ftp默認的端口是21
}
//很多人寫的是用ftp.getReplyCode()給獲取連接的返回值,但是這樣會導致storeFileStream返回null
ftp.login(username,password)
ftp.enterLocalActiveMode();
ftp.setFileType(FTPClient.BINARY_FILE_TYPE);
reply=ftp.getReplyCode();
if(!FTPReply.isPositionCompletion(reply))
{
ftp.disconnect();
return success;s
}
//切換目錄 此處可以判斷,切換失敗就說明ftp上面沒有這個路徑
ftp.changeWorkingDirectory(path);
//上傳文件
FTPFile[]fs=ftp.listFiles();
OutputStream out=null;
InputStream in=null;
for(int i=0;i<fs.length;i++)
{
FTPFile ff=fs[i];
String outFileName=ff.getName();
//創建本地的文件時候要把編碼格式轉回來
String localFileName=new String(ff.getName().getBytes("ISO-8859-"),"GBK");
File localFile=new File(localpath+lcoalFileName);
out=new FileOutputStream(localFile);
in=ftp.retrieveFileStream(outFileName);
byte[]byteArray=new byte[4096];
int read=0;
while((read=in.read(byteArray))!=-1)
{
out.write(byteArray,0,read);
}
//這句很重要 要多次操作這個ftp的流的通道,要等他的每次命令完成
ftp.completePendingCommand();
out.flush();
out.close();
ftp.logout();
sucess=true;
}
catch(Exception e)
{
}
finally{
if(ftp.isConnected())
{
ftp.disConnecct();
}
}
}
上面代碼都在博客園編輯器手敲的可能會有些錯誤,上面兩種方式速度都很塊 比上傳用storeFile 下載用retrieveFile這種方法快很多
