private void initFTPFile() {
try {
String path = getURL().getPath();
// 如果且以"/"结尾，去掉"/"
if (path.endsWith("/")) {
path = path.substring(0, path.lastIndexOf('/'));
}
// 资源在服务器中所属目录
String checkPath = path.substring(0, path.lastIndexOf('/'));
// 如果所属目录为根目录
if (checkPath.length() == 0) {
checkPath = "/";
}
String fileName = path.substring(path.lastIndexOf('/'));
fileName = fileName.substring(fileName.lastIndexOf('/') + 1);
ftpClient.enterLocalPassiveMode();
// 从上级目录的子目录中过滤出当前资源
FTPFile[] files = ftpClient.listFiles(recode(checkPath), new FtpFileFilterByName(fileName));
if (files != null && files.length == 1) {
ftpFile = files[0];
} else {
throw new TinySysRuntimeException("查找资源失败，url=" + getURL());
}
} catch (Exception e) {
throw new VFSRuntimeException(e);
}
}
