基于MD5 的双重加密

package com.goods.springbootmybatisgoods.util;import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;/*** MD5加密工具类*/
public class MD5Util {/*** 生成盐值* @param source 需要加密的字符串* @return 加密后的字符串*/public static String md5(String source) {try {// 创建MD5消息摘要对象MessageDigest md = MessageDigest.getInstance("MD5");// 将输入字符串转换为字节数组byte[] inputBytes = source.getBytes();// 计算MD5摘要byte[] md5Bytes = md.digest(inputBytes);// 将字节数组转换为16进制字符串StringBuilder sb = new StringBuilder();for (byte b : md5Bytes) {sb.append(String.format("%02x", b));}String md5Hash = sb.toString();System.out.println("MD5 Hash: " + md5Hash);return md5Hash;} catch (NoSuchAlgorithmException e) {throw new RuntimeException(e);}}/*** 生成盐值* @param source 需要加密的字符串* @param salt 盐值* @return 加密后的字符串*/public static String md5(String source, String salt) {try {byte[] saltByte = salt.getBytes();// 创建MD5消息摘要对象MessageDigest md = MessageDigest.getInstance("MD5");// 将密码和盐值连接byte[] passwordWithSalt = concatenateByteArrays(source.getBytes(), saltByte);// 计算MD5摘要byte[] md5Bytes = md.digest(passwordWithSalt);// 将字节数组转换为16进制字符串StringBuilder sb = new StringBuilder();for (byte b : md5Bytes) {sb.append(String.format("%02x", b));}return sb.toString();} catch (NoSuchAlgorithmException e) {e.printStackTrace();}return source;}private static byte[] concatenateByteArrays(byte[] a, byte[] b) {byte[] result = new byte[a.length + b.length];System.arraycopy(a, 0, result, 0, a.length);System.arraycopy(b, 0, result, a.length, b.length);return result;}/*** 加密密码 两次MD5* @param password 密码* @param salt 盐值* @return 加密后的密码*/public static String encodePassword(String password, String salt) {return md5(md5(password, salt));}
}