package com.ruoyi.common.core.utils;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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public class MD5Util {
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/**
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* 给指定字符串按照md5算法去加密
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*
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* @param psd 需要加密的密码 加盐处理
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*
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* @return md5后的字符串
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*/
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public static String encoder(String psd) {
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try {
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//加盐处理
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psd = psd + "mobilesafe";
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//1,指定加密算法类型
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MessageDigest digest = MessageDigest.getInstance("MD5");
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//2,将需要加密的字符串中转换成byte类型的数组,然后进行随机哈希过程
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byte[] bs = digest.digest(psd.getBytes());
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// System.out.println(bs.length);
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//3,循环遍历bs,然后让其生成32位字符串,固定写法
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//4,拼接字符串过程
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StringBuffer stringBuffer = new StringBuffer();
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for (byte b : bs) {
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int i = b & 0xff;
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//int类型的i需要转换成16机制字符
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String hexString = Integer.toHexString(i);
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// System.out.println(hexString);
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if (hexString.length() < 2) {
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hexString = "0" + hexString;
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}
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stringBuffer.append(hexString);
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}
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//5,打印测试
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System.out.println(stringBuffer.toString());
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return stringBuffer.toString();
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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}
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return "";
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}
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/**
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* MD5加密字符串
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*
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* @param str
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* @return
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*/
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public static String getMD5(String str) {
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if (StringUtils.isNotEmpty(str)) {
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try {
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// 创建MD5加密实例
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MessageDigest md = MessageDigest.getInstance("MD5");
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// 执行加密操作
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byte[] messageDigest = md.digest(str.getBytes());
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// 将得到的散列值转换为十六进制
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StringBuilder sb = new StringBuilder();
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for (byte b : messageDigest) {
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sb.append(String.format("%02x", b));
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}
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// 返回MD5散列值
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return sb.toString();
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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}
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}
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return "";
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}
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}
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