public static void main(String[] args) { // spring 4.0.0 org.springframework.security.crypto.password.PasswordEncoder encoder = new org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder(); // $2a$10$lB6/PKg2/JC4XgdMDXyjs.dLC9jFNAuuNbFkL9udcXe/EBjxSyqxW // true // $2a$10$KbQiHKTa1WIsQFTQWQKCiujoTJJB7MCMSaSgG/imVkKRicMPwgN5i // true // $2a$10$5WfW4uxVb4SIdzcTJI9U7eU4ZwaocrvP.2CKkWJkBDKz1dmCh50J2 // true // $2a$10$0wR/6uaPxU7kGyUIsx/JS.krbAA9429fwsuCyTlEFJG54HgdR10nK // true // $2a$10$gfmnyiTlf8MDmwG7oqKJG.W8rrag8jt6dNW.31ukgr0.quwGujUuO // true for (int i = 0; i < 5; i++) { // "123456" - plain text - user input from user interface String passwd = encoder.encode("123456"); // passwd - password from database System.out.println(passwd); // print hash // true for all 5 iteration System.out.println(encoder.matches("123456", passwd)); } }