ftp.changeWorkingDirectory(FTP_BASEPATH);// 转移到FTP服务器目录
ftp.enterLocalPassiveMode();
ftp.setFileType(FTP.BINARY_FILE_TYPE);
FTPFile[] fs = ftp.listFiles();
for (FTPFile ff : fs) {
String ftpName= new String(ff.getName().getBytes("ISO8859-1"), "utf-8");
if (ftpName.equals(fileName)) {
InputStream in = ftp.retrieveFileStream(ff.getName());//读取ftp服务器文件,返回输入流
int len = 0;
byte[] buff = new byte[1024 * 1024];
response.reset();
response.setContentType("application/octet-stream");
response.addHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");
OutputStream out = response.getOutputStream(); //响应输出字节流
while ((len = in.read(buff)) != -1) {
log.debug("以字节流形式写出OutPutStream");
out.write(buff, 0, len);
out.flush();
}
in.close();
out.close();
ftp.completePendingCommand();
}
}