转---ftp客户端

高6627

　　http://www.cnblogs.com/tt_mc/archive/2010/03/22/1691708.html
　　利用org.apache.commons.net.ftp包实现一个简单的ftp客户端实用类。主要实现一下功能
　　1.支持上传下载。支持断点续传
　　2.支持进度汇报
　　3.支持对于中文目录及中文文件创建的支持。
　　
　　
　　
　　
　　importjava.io.File;
importjava.io.FileOutputStream;
importjava.io.IOException;
importjava.io.InputStream;
importjava.io.OutputStream;
importjava.io.PrintWriter;
importjava.io.RandomAccessFile;

importopen.mis.data.DownloadStatus;
importopen.mis.data.UploadStatus;

importorg.apache.commons.net.PrintCommandListener;
importorg.apache.commons.net.ftp.FTP;
importorg.apache.commons.net.ftp.FTPClient;
importorg.apache.commons.net.ftp.FTPFile;
importorg.apache.commons.net.ftp.FTPReply;

/***//**
*支持断点续传的FTP实用类
*@authorBenZhouhttp://www.bt285.cn
*@version0.1实现基本断点上传下载
*@version0.2实现上传下载进度汇报
*@version0.3实现中文目录创建及中文文件创建，添加对于中文的支持
*/
publicclassContinueFTP{
publicFTPClientftpClient=newFTPClient();

publicContinueFTP(){
//设置将过程中使用到的命令输出到控制台
this.ftpClient.addProtocolCommandListener(newPrintCommandListener(newPrintWriter(System.out)));
}

/***//**
*连接到FTP服务器
*@paramhostname主机名
*@paramport端口
*@paramusername用户名
*@parampassword密码
*@return是否连接成功
*@throwsIOException
*/
publicbooleanconnect(Stringhostname,intport,Stringusername,Stringpassword)throwsIOException{
ftpClient.connect(hostname,port);
ftpClient.setControlEncoding("GBK");
if(FTPReply.isPositiveCompletion(ftpClient.getReplyCode())){
if(ftpClient.login(username,password)){
returntrue;
}
}
disconnect();
returnfalse;
}

/***//**
*从FTP服务器上下载文件,支持断点续传，上传百分比汇报
*@paramremote远程文件路径
*@paramlocal本地文件路径
*@return上传的状态
*@throwsIOException
*/
publicDownloadStatusdownload(Stringremote,Stringlocal)throwsIOException{
//设置被动模式
ftpClient.enterLocalPassiveMode();
//设置以二进制方式传输
ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
DownloadStatusresult;

//检查远程文件是否存在
FTPFile[]files=ftpClient.listFiles(newString(remote.getBytes("GBK"),"iso-8859-1"));
if(files.length!=1){
System.out.println("远程文件不存在");
returnDownloadStatus.Remote_File_Noexist;
}

longlRemoteSize=files[0].getSize();
Filef=newFile(local);
//本地存在文件，进行断点下载
if(f.exists()){
longlocalSize=f.length();
//判断本地文件大小是否大于远程文件大小
if(localSize>=lRemoteSize){
System.out.println("本地文件大于远程文件，下载中止");
returnDownloadStatus.Local_Bigger_Remote;
}

//进行断点续传，并记录状态
FileOutputStreamout=newFileOutputStream(f,true);
ftpClient.setRestartOffset(localSize);
InputStreamin=ftpClient.retrieveFileStream(newString(remote.getBytes("GBK"),"iso-8859-1"));
byte[]bytes=newbyte[1024];
longstep=lRemoteSize/100;
longprocess=localSize/step;
intc;
while((c=in.read(bytes))!=-1){
out.write(bytes,0,c);
localSize+=c;
longnowProcess=localSize/step;
if(nowProcess>process){
process=nowProcess;
if(process%10==0)
System.out.println("下载进度："+process);
//TODO更新文件下载进度,值存放在process变量中
}
}
in.close();
out.close();
booleanisDo=ftpClient.completePendingCommand();
if(isDo){
result=DownloadStatus.Download_From_Break_Success;
}else{
result=DownloadStatus.Download_From_Break_Failed;
}
}else{
OutputStreamout=newFileOutputStream(f);
InputStreamin=ftpClient.retrieveFileStream(newString(remote.getBytes("GBK"),"iso-8859-1"));
byte[]bytes=newbyte[1024];
longstep=lRemoteSize/100;
longprocess=0;
longlocalSize=0L;
intc;
while((c=in.read(bytes))!=-1){
out.write(bytes,0,c);
localSize+=c;
longnowProcess=localSize/step;
if(nowProcess>process){
process=nowProcess;
if(process%10==0)
System.out.println("下载进度："+process);
//TODO更新文件下载进度,值存放在process变量中
}
}
in.close();
out.close();
booleanupNewStatus=ftpClient.completePendingCommand();
if(upNewStatus){
result=DownloadStatus.Download_New_Success;
}else{
result=DownloadStatus.Download_New_Failed;
}
}
returnresult;
}

/***//**
*上传文件到FTP服务器，支持断点续传
*@paramlocal本地文件名称，绝对路径
*@paramremote远程文件路径，使用/home/directory1/subdirectory/file.ext或是http://www.guihua.org/subdirectory/file.ext按照Linux上的路径指定方式，支持多级目录嵌套，支持递归创建不存在的目录结构
*@return上传结果
*@throwsIOException
*/
publicUploadStatusupload(Stringlocal,Stringremote)throwsIOException{
//设置PassiveMode传输
ftpClient.enterLocalPassiveMode();
//设置以二进制流的方式传输
ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
ftpClient.setControlEncoding("GBK");
UploadStatusresult;
//对远程目录的处理
StringremoteFileName=remote;
if(remote.contains("/")){
remoteFileName=remote.substring(remote.lastIndexOf("/")+1);
//创建服务器远程目录结构，创建失败直接返回
if(CreateDirecroty(remote,ftpClient)==UploadStatus.Create_Directory_Fail){
returnUploadStatus.Create_Directory_Fail;
}
}

//检查远程是否存在文件
FTPFile[]files=ftpClient.listFiles(newString(remoteFileName.getBytes("GBK"),"iso-8859-1"));
if(files.length==1){
longremoteSize=files[0].getSize();
Filef=newFile(local);
longlocalSize=f.length();
if(remoteSize==localSize){
returnUploadStatus.File_Exits;
}elseif(remoteSize>localSize){
returnUploadStatus.Remote_Bigger_Local;
}

//尝试移动文件内读取指针,实现断点续传
result=uploadFile(remoteFileName,f,ftpClient,remoteSize);

//如果断点续传没有成功，则删除服务器上文件，重新上传
if(result==UploadStatus.Upload_From_Break_Failed){
if(!ftpClient.deleteFile(remoteFileName)){
returnUploadStatus.Delete_Remote_Faild;
}
result=uploadFile(remoteFileName,f,ftpClient,0);
}
}else{
result=uploadFile(remoteFileName,newFile(local),ftpClient,0);
}
returnresult;
}
/***//**
*断开与远程服务器的连接
*@throwsIOException
*/
publicvoiddisconnect()throwsIOException{
if(ftpClient.isConnected()){
ftpClient.disconnect();
}
}

/***//**
*递归创建远程服务器目录
*@paramremote远程服务器文件绝对路径
*@paramftpClientFTPClient对象
*@return目录创建是否成功
*@throwsIOException
*/
publicUploadStatusCreateDirecroty(Stringremote,FTPClientftpClient)throwsIOException{
UploadStatusstatus=UploadStatus.Create_Directory_Success;
Stringdirectory=remote.substring(0,remote.lastIndexOf("/")+1);
if(!directory.equalsIgnoreCase("/")&&!ftpClient.changeWorkingDirectory(newString(directory.getBytes("GBK"),"iso-8859-1"))){
//如果远程目录不存在，则递归创建远程服务器目录
intstart=0;
intend=0;
if(directory.startsWith("/")){
start=1;
}else{
start=0;
}
end=directory.indexOf("/",start);
while(true){
StringsubDirectory=newString(remote.substring(start,end).getBytes("GBK"),"iso-8859-1");
if(!ftpClient.changeWorkingDirectory(subDirectory)){
if(ftpClient.makeDirectory(subDirectory)){
ftpClient.changeWorkingDirectory(subDirectory);
}else{
System.out.println("创建目录失败");
returnUploadStatus.Create_Directory_Fail;
}
}

start=end+1;
end=directory.indexOf("/",start);

//检查所有目录是否创建完毕
if(end<=start){
break;
}
}
}
returnstatus;
}

/***//**
*上传文件到服务器,新上传和断点续传
*@paramremoteFile远程文件名，在上传之前已经将服务器工作目录做了改变
*@paramlocalFile本地文件File句柄，绝对路径
*@paramprocessStep需要显示的处理进度步进值
*@paramftpClientFTPClient引用
*@return
*@throwsIOException
*/
publicUploadStatusuploadFile(StringremoteFile,FilelocalFile,FTPClientftpClient,longremoteSize)throwsIOException{
UploadStatusstatus;
//显示进度的上传
longstep=localFile.length()/100;
longprocess=0;
longlocalreadbytes=0L;
RandomAccessFileraf=newRandomAccessFile(localFile,"r");
OutputStreamout=ftpClient.appendFileStream(newString(remoteFile.getBytes("GBK"),"iso-8859-1"));
//断点续传
if(remoteSize>0){
ftpClient.setRestartOffset(remoteSize);
process=remoteSize/step;
raf.seek(remoteSize);
localreadbytes=remoteSize;
}
byte[]bytes=newbyte[1024];
intc;
while((c=raf.read(bytes))!=-1){
out.write(bytes,0,c);
localreadbytes+=c;
if(localreadbytes/step!=process){
process=localreadbytes/step;
System.out.println("上传进度:"+process);
//TODO汇报上传状态
}
}
out.flush();
raf.close();
out.close();
booleanresult=ftpClient.completePendingCommand();
if(remoteSize>0){
status=result?UploadStatus.Upload_From_Break_Success:UploadStatus.Upload_From_Break_Failed;
}else{
status=result?UploadStatus.Upload_New_File_Success:UploadStatus.Upload_New_File_Failed;
}
returnstatus;
}

publicstaticvoidmain(String[]args){
ContinueFTPmyFtp=newContinueFTP();
try{
myFtp.connect("192.168.21.181",21,"nid","123");
//myFtp.ftpClient.makeDirectory(newString("电视剧".getBytes("GBK"),"iso-8859-1"));
//myFtp.ftpClient.changeWorkingDirectory(newString("电视剧".getBytes("GBK"),"iso-8859-1"));
//myFtp.ftpClient.makeDirectory(newString("走西口".getBytes("GBK"),"iso-8859-1"));
//System.out.println(myFtp.upload("http://www.5a520.cn/yw.flv","/yw.flv",5));
//System.out.println(myFtp.upload("http://www.5a520.cn/走西口24.mp4","/央视走西口/新浪网/走西口24.mp4"));
System.out.println(myFtp.download("/央视走西口/新浪网/走西口24.mp4","E://走西口242.mp4"));
myFtp.disconnect();
}catch(IOExceptione){
System.out.println("连接FTP出错："+e.getMessage());
}
}
}