java存储用户信息用MD5对密码加密

来源：互联网发布：伊朗f313知乎编辑：程序博客网时间：2024/06/07 14:06

为保证用户信息安全，在存储用户信息进入数据库时需对密码进行加密，这里选择单向加密（不能解密）的MD5方式

MD5Util.java

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 charsetname) {String resultString = null;try {resultString = new String(origin);MessageDigest md = MessageDigest.getInstance("MD5");if (charsetname == null || "".equals(charsetname))resultString = byteArrayToHexString(md.digest(resultString.getBytes()));elseresultString = byteArrayToHexString(md.digest(resultString.getBytes(charsetname)));} catch (Exception exception) {}return resultString;}private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5","6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };

调用该工具类：MD5Util.MD5Encode(pwd, "utf-8")

判断登录时，将输入密码加密后与数据库存储密码判断一致。

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