用xftp设置成utf8格式上传后再读取文件会文件名乱码

最近一直在做从ftp上读取文件并且下载文件，但是会出现乱码，一开始在获取文件名后转码的，发现虽然不乱码了但是文件却变成文件夹了后来才发现必须在连接ftp的时候就要设置编码格式

public static void main(String[] args) {
FtpUtil util = new FtpUtil();
FtpInfo ftp = new FtpInfo();
ftp.setIp("******");
ftp.setPort("******");
ftp.setUserName("******");
ftp.setPassword("******");
try {
util.connectServer(ftp, "");
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}

try {
util.getFileList("/");
} catch (IOException e) {
e.printStackTrace();
}

try {
InputStream is = util.downFile("/test.txt");

util.readStream(is,"test.txt");

} catch (Exception e) {
e.printStackTrace();
}

}

根据文件路径访问文件
public InputStream downFile(String sourceFileName) throws IOException {
ftpClient.enterLocalPassiveMode();
//设置编码格式
return ftpClient.retrieveFileStream(new String(sourceFileName.getBytes("UTF-8"), "ISO-8859-1"));
//        return ftpClient.retrieveFileStream(sourceFileName);
}

//读取流
public void  readStream(InputStream inStream,String name) throws Exception {
OutputStream  outputStream = new FileOutputStream(name);
byte[] buffer = new byte[1024];
int len = -1;
while ((len = inStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, len);
}
outputStream.close();
inStream.close();
outputStream.flush();
}