public void downloadFileFtp(String fileName, OutputStream outputStream) throws Exception,java.lang.InstantiationError {
String ftpHost = PropertiesUtils.getProperty("ftpHost");
int port = Integer.parseInt(PropertiesUtils.getProperty("ftpPort"));
String userName = PropertiesUtils.getProperty("ftpUserName");
String passWord = PropertiesUtils.getProperty("ftpPassWord");
String path = PropertiesUtils.getProperty("fileDir");
FtpClient ftpClient = new FtpClient(ftpHost, port);// ftpHost为FTP服务器的IP地址,port为FTP服务器的登陆端口,ftpHost为String型,port为int型。
ftpClient.login(userName, passWord);// userName、passWord分别为FTP服务器的登陆用户名和密码
ftpClient.cd(path);
ftpClient.binary();
TelnetInputStream in = ftpClient.get(fileName);
byte[] bytes = new byte[1024];
int cnt = 0;
while ((cnt = in.read(bytes, 0, bytes.length)) != -1) {
outputStream.write(bytes, 0, cnt);
}
outputStream.close();
in.close();
ftpClient.closeServer();
}