MD5加密
- public final static String MD5(String s) {
- //16进制下数字到字符的映射数组
- char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
- 'a', 'b', 'c', 'd', 'e', 'f' };
- try {
- byte[] strTemp = s.getBytes();
- MessageDigest mdTemp = MessageDigest.getInstance("MD5");
- mdTemp.update(strTemp);
- byte[] md = mdTemp.digest();
- int j = md.length;
- char str[] = new char[j * 2];
- int k = 0;
- for (int i = 0; i < j; i++) {
- byte byte0 = md[i];
- str[k++] = hexDigits[byte0 >>> 4 & 0xf];
- str[k++] = hexDigits[byte0 & 0xf];
- }
- return new String(str);
- } catch (Exception e) {
- // TODO: handle exception
- e.printStackTrace();
- return null;
- }
- }
例如输入字符串是:123456
MD5加密之后是:e10adc3949ba59abbe56e057f20f883e