java 采用MD5加密解密详解编程语言

char[] charArray = inStr.toCharArray(); byte[] byteArray = new byte[charArray.length]; for (int i = 0; i charArray.length; i++) byteArray[i] = (byte) charArray[i]; byte[] md5Bytes = md5.digest(byteArray); StringBuffer hexValue = new StringBuffer(); for (int i = 0; i md5Bytes.length; i++){ int val = ((int) md5Bytes[i]) 0xff; if (val 16) hexValue.append("0"); hexValue.append(Integer.toHexString(val)); return hexValue.toString(); /** * 加密解密算法 执行一次加密，两次解密 public static String convertMD5(String inStr){ char[] a = inStr.toCharArray(); for (int i = 0; i a.length; i++){ a[i] = (char) (a[i] ^ t); String s = new String(a); return s; // 测试主函数 public static void main(String args[]) { String s = new String("tangfuqiang"); System.out.println("原始：" + s); System.out.println("MD5后：" + string2MD5(s)); System.out.println("加密的：" + convertMD5(s)); System.out.println("解密的：" + convertMD5(convertMD5(s))); }

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