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        /**
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         * @param content ÐèÒª¼ÓÃܵÄÄÚÈÝ
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         * @return
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                try {          
                        KeyGenerator kgen = KeyGenerator.getInstance("AES");
                        kgen.init(128, new SecureRandom(password.getBytes()));
                        SecretKey secretKey = kgen.generateKey();
                        byte[] enCodeFormat = secretKey.getEncoded();
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