JAVA MD5加密存储用户密码
public class MD5 {
public MD5() {} private static final Logger log = LoggerFactory.getLogger(MD5.class); private static String[] hexDigits = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" }; /** * 转换字节数组为16进制字串 * * @param b * 字节数组 * @return 16进制字串 */ private static String byteArrayToHexString(byte[] b) { StringBuffer resultSb = new StringBuffer(); for (int i = 0; i < b.length; i++) { resultSb.append(byteToHexString(b[i])); } return resultSb.toString(); } private static String byteToHexString(byte b) { int n = b; if (n < 0) n += 256; int d1 = n / 16; int d2 = n % 16; return hexDigits[d1] + hexDigits[d2]; } public static String MD5Encode(String origin) { String resultString = null; try { resultString = new String(origin); MessageDigest md = MessageDigest.getInstance("MD5"); resultString = byteArrayToHexString(md.digest(resultString.getBytes())); } catch (Exception ex) { ex.printStackTrace(); } return resultString; } } //测试 class Test { public static void main(String[] args) { MD5 md5 = new MD5(); String test = md5.MD5Encode("123457"); System.out.println(test); } } 结果:f1887d3f9e6ee7a32fe5e76f4ab80d63
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