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public boolean download(String remoteFile, String localFile) {
HttpServletRequest request = ServletActionContext.getRequest();
HttpSession session = request.getSession();
boolean flag = false;
try {
boolean flag2 = connectServer();
if (flag2) {
ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
ftpClient.enterLocalActiveMode(); //这句重要,不行换enterRemoteActiveMode 看看
ftpClient.setFileTransferMode(FTP.STREAM_TRANSFER_MODE);
ftpClient.setBufferSize(1024);
ftpClient.setControlEncoding("UTF-8");
FTPClientConfig conf = new FTPClientConfig(
FTPClientConfig.SYST_NT);
conf.setServerLanguageCode("zh");
File file_in = new File(localFile);
FileOutputStream fos = new FileOutputStream(file_in);
flag = ftpClient.retrieveFile(directory + remoteFile, fos);
ftpClient.disconnect();
}
} catch (IOException ex) {
// flag = false;
System.out.println("not download");
System.out.println(ex);
} finally {
try {
ftpClient.disconnect();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return flag;
}
public DownloadStatus download(String remote,String local) throws IOException{
//设置被动模式
ftpClient.enterLocalPassiveMode();
//设置以二进制方式传输
ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
DownloadStatus result;
//检查远程文件是否存在
FTPFile[] files = ftpClient.listFiles(new String(remote.getBytes("GBK"),"iso-8859-1"));
if(files.length != 1){
System.out.println("远程文件不存在");
return DownloadStatus.Remote_File_Noexist;
}
long lRemoteSize = files[0].getSize();
File f = new File(local);
//本地存在文件,进行断点下载
if(f.exists()){
long localSize = 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");
return DownloadStatus.Local_Bigger_Remote;
}
//进行断点续传,并记录状态
FileOutputStream out = new FileOutputStream(f,true);
ftpClient.setRestartOffset(localSize);
InputStream in = ftpClient.retrieveFileStream(new String(remote.getBytes("GBK"),"iso-8859-1"));
byte[] bytes = new byte[1024];
long step = lRemoteSize /100;
long process=localSize /step;
int c;
while((c = in.read(bytes))!= -1){
out.write(bytes,0,c);
localSize+=c;
long nowProcess = 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();
boolean isDo = ftpClient.completePendingCommand();
if(isDo){
result = DownloadStatus.Download_From_Break_Success;
}else {
result = DownloadStatus.Download_From_Break_Failed;
}
}else {
OutputStream out = new FileOutputStream(f);
InputStream in= ftpClient.retrieveFileStream(new String(remote.getBytes("GBK"),"iso-8859-1"));
byte[] bytes = new byte[1024];
long step = lRemoteSize /100;
long process=0;
long localSize = 0L;
int c;
while((c = in.read(bytes))!= -1){
out.write(bytes, 0, c);
localSize+=c;
long nowProcess = 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();
boolean upNewStatus = ftpClient.completePendingCommand();
if(upNewStatus){
result = DownloadStatus.Download_New_Success;
}else {
result = DownloadStatus.Download_New_Failed;
}
}
return result;
}