MySQL encryption and md5 Encryption

MySQL encryption and md5 Encryption

MySQL field encryption and decryption 1. encryption: aes_encrypt ('admin', 'key') Decryption: aes_decrypt (password, 'key') 2. two-way encryption is encrypted by the key. Only the person who knows the key is used for decryption. encryption: encode () Decryption: decode () eg: encode ('000000' 'adfdgfdhggfh'); decode (password, 'adfdgfdhggfh'); 3. PASSWORD ('000000') password encryption is irreversible 4. MD5 ('200') // UserDao public User login (Connection con, User user) throws Exception {User resultUser = null; String SQL = "select userName, AES_DECRYPT (password, 'key ') Password from t_user where userName =? And AES_DECRYPT (PASSWORD, 'key') =? "; PreparedStatement pstmt = con. prepareStatement (SQL); pstmt. setString (1, user. getUserName (); pstmt. setString (2, user. getPassword (); ResultSet rs1_pstmt.exe cuteQuery (); if (rs. next () {resultUser = new User (); resultUser. setUserName (rs. getString (1); resultUser. setPassword (rs. getString (2); System. out. println (resultUser. getPassword () + "^");} return resultUser;} // SQL statement insert into t_user (userName, password) values ('admin ', AES_ENCRYPT ('123', 'key'); select userName, AES_DECRYPT (password, 'key') password from t_user;