package org.ruoyi.common.utils;
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import cn.hutool.core.util.StrUtil;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.util.Map;
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import java.util.TreeMap;
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/**
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* MD5 算法
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*
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* @author Admin
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*/
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public class MD5Util {
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/**
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* 全局数组
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*/
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public final static String[] strDigits = { "0", "1", "2", "3", "4", "5",
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"6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
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public MD5Util() {
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}
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/**
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* 返回形式为数字跟字符串
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*
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* @Date 2023/7/3
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* @param bByte
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* @return String
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**/
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public static String byteToArrayString(byte bByte) {
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int iRet = bByte;
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if (iRet < 0) {
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iRet += 256;
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}
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int iD1 = iRet / 16;
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int iD2 = iRet % 16;
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return strDigits[iD1] + strDigits[iD2];
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}
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/**
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* 转换字节数组为16进制字串
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*
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* @Date 2023/7/3
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* @param bByte
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* @return String
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**/
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public static String byteToString(byte[] bByte) {
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StringBuffer sBuffer = new StringBuffer();
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for (int i = 0; i < bByte.length; i++) {
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sBuffer.append(byteToArrayString(bByte[i]));
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}
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return sBuffer.toString();
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}
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/**
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* 生成md5代码
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*
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* @Date 2023/7/3
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* @param strObj
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* @return String
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**/
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public static String GetMD5Code(String strObj) {
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String resultString = null;
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try {
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resultString = new String(strObj);
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MessageDigest md = MessageDigest.getInstance("MD5");
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resultString = byteToString(md.digest(strObj.getBytes()));
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} catch (NoSuchAlgorithmException ex) {
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ex.printStackTrace();
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}
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return resultString;
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}
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/**
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* 组装签名的字段
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*
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* @param params 参数
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* @param urlEncoder 是否urlEncoder
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* @return {String}
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*/
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public static String packageSign(Map<String, Object> params, boolean urlEncoder) {
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// 先将参数以其参数名的字典序升序进行排序
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TreeMap<String, Object> sortedParams = new TreeMap<String, Object>(params);
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// 遍历排序后的字典，将所有参数按"key=value"格式拼接在一起
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StringBuilder sb = new StringBuilder();
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boolean first = true;
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for (Map.Entry<String, Object> param : sortedParams.entrySet()) {
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String value = String.valueOf(param.getValue());
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if (StrUtil.isBlank(value)) {
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continue;
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}
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if (first) {
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first = false;
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} else {
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sb.append("&");
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}
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sb.append(param.getKey()).append("=");
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sb.append(value);
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}
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return sb.toString();
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}
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}
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