Java code to connect to FTP server using SSL

Question

I am looking for Java sample code to connect to FTP server using SSL certificate. I have all needed certificates in my project folder. I tried some approach, but it doesnt work. We are using Spring batch component. Any help is appreciated. Thanks

protected FTPSClient createFTPClient() throws Exception {
 FTPSClient client = new FTPSClient(protocol,true); 
 client.setNeedClientAuth(true);
 KeyStore ks = KeyStore.getInstance("JKS"); 
 FileInputStream fis = new FileInputStream(keyStoreFile);
 ks.load(fis, keyStorePassword.toCharArray());
 fis.close();
 KeyManagerFactory kmf = KeyManagerFactory.getInstance(KeyManagerFactory .getDefaultAlgorithm());
 kmf.init(ks, keyStorePassword.toCharArray());
 client.setKeyManager(kmf.getKeyManagers()[0]);
 return client; 
}

int reply; 
FTPSClient ftps = null;
try { 
  ftps = createFTPClient();
  ftps.addProtocolCommandListener(new PrintCommandListener(new PrintWriter(System.out)));       
  //ftps.setTrustManager(trustManager) 
  ftps.connect(host,portnumber);
  ......

I am getting Plaintext connection exception....

Answer 1

I got this from this different question 425 error ftp over SSL in Java

ftps.setTrustManager(TrustManagerUtils.getAcceptAllTrustManager());

It might help.