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+package com.qunzhixinxi.hnqz.admin.util;
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+import lombok.extern.slf4j.Slf4j;
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+
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+import java.io.File;
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+import java.io.FileInputStream;
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+import java.io.IOException;
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+import java.math.BigInteger;
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+import java.nio.MappedByteBuffer;
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+import java.nio.channels.FileChannel;
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+import java.security.MessageDigest;
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+import java.security.NoSuchAlgorithmException;
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+import java.util.Collections;
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+import java.util.Comparator;
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+import java.util.HashMap;
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+import java.util.List;
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+@Slf4j
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+public class Md5Utils {
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+
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+ public static String MD5(String s) {
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+ try {
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+ byte[] btInput = s.getBytes("utf-8");
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+ // 获得MD5摘要算法的 MessageDigest 对象
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+ MessageDigest mdInst = MessageDigest.getInstance("MD5");
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+ // 使用指定的字节更新摘要
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+ mdInst.update(btInput);
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+ // 获得密文
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+ byte[] md = mdInst.digest();
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+ // 把密文转换成十六进制的字符串形式
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+ return byteArrayToHex(md);
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+ } catch (Exception e) {
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+ //e.printStackTrace();
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+ log.error("秘闻转换异常",e);
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+ return null;
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+ }
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+ }
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+
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+ public static String getMd5ByFileProperty(String fileProperty) {
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+ try {
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+ // 拿到一个MD5转换器（如果想要SHA1参数换成”SHA1”）
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+ MessageDigest messageDigest = MessageDigest.getInstance("MD5");
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+ // 输入的字符串转换成字节数组
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+ byte[] inputByteArray = fileProperty.getBytes();
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+ // inputByteArray是输入字符串转换得到的字节数组
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+ messageDigest.update(inputByteArray);
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+ // 转换并返回结果，也是字节数组，包含16个元素
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+ byte[] resultByteArray = messageDigest.digest();
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+ // 字符数组转换成字符串返回
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+ return byteArrayToHex(resultByteArray);
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+ } catch (NoSuchAlgorithmException e) {
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+ e.printStackTrace();
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+ return null;
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+ }
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+ }
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+
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+ public static String byteArrayToHex(byte[] byteArray) {
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+ // 首先初始化一个字符数组，用来存放每个16进制字符
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+ char[] hexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
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+ 'A', 'B', 'C', 'D', 'E', 'F' };
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+ // new一个字符数组，这个就是用来组成结果字符串的（解释一下：一个byte是八位二进制，也就是2位十六进制字符（2的8次方等于16的2次方））
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+ char[] resultCharArray = new char[byteArray.length * 2];
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+ // 遍历字节数组，通过位运算（位运算效率高），转换成字符放到字符数组中去
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+ int index = 0;
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+ for (byte b : byteArray) {
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+ resultCharArray[index++] = hexDigits[b >>> 4 & 0xf];
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+ resultCharArray[index++] = hexDigits[b & 0xf];
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+ }
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+ // 字符数组组合成字符串返回
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+ return new String(resultCharArray);
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+
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+ }
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+
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+ public static String getMd5ByFile(File file) {
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+ String value = null;
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+ FileInputStream in = null;
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+ FileChannel ch = null;
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+ try {
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+ in = new FileInputStream(file);
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+ ch = in.getChannel();
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+ MappedByteBuffer byteBuffer = ch.map(FileChannel.MapMode.READ_ONLY, 0, file.length());
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+ MessageDigest md5 = MessageDigest.getInstance("MD5");
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+ md5.update(byteBuffer);
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+ BigInteger bi = new BigInteger(1, md5.digest());
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+ value = bi.toString(16);
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+ } catch (Exception e) {
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+ e.printStackTrace();
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+ } finally {
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+ if (null != ch) {
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+ try {
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+ ch.close();
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+ } catch (IOException e) {
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+ e.printStackTrace();
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+ }
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+ }
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+ if (null != in) {
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+ try {
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+ in.close();
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+ } catch (IOException e) {
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+ e.printStackTrace();
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+ }
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+ }
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+ }
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+ return value.toUpperCase();
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+ }
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+
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+ /**
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+ * MD5校验
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+ * @param request
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+ * @param key
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+ * @param strMd5
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+ * @return
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+ */
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+ public static boolean check(List<String> listSort, HashMap<String, String> hm, String key, String strMd5, HashMap<String, String> remove, StringBuffer log) {
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+ String str = "";
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+ for (String mkey : listSort) {
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+ if(null != remove.get(mkey) && !"".equals(remove.get(mkey))) continue;
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+ if (null == hm.get(mkey)) continue;
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+ str+=hm.get(mkey);
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+ }
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+ str+=key;
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+ String tempMd5 = MD5(str);
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+
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+ if (tempMd5.equals(strMd5.toUpperCase())) {
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+ return true;
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+ }
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+
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+ log.append("MD5(").append(str).append(") = ").append(tempMd5.toLowerCase()).append("\r\n");
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+ return false;
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+ }
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+
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+ public static String getSign(List<String> listSort, HashMap<String, String> hm, String key) {
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+ Collections.sort(listSort, new Comparator<String>() {
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+ public int compare(String arg0, String arg1) {
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+ return arg0.compareTo(arg1);
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+ }
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+ });
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+ String str = "";
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+ for (String mkey : listSort) {
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+ if (null == hm.get(mkey)) continue;
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+ str+=hm.get(mkey);
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+ }
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+ str+=key;
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+ String tempMd5 = MD5(str);
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+
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+ return tempMd5;
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+ }
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+ private static String byteArrayToHexString(byte b[]) {
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+ StringBuffer resultSb = new StringBuffer();
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+ for (int i = 0; i < b.length; i++)
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+ resultSb.append(byteToHexString(b[i]));
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+
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+ return resultSb.toString();
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+ }
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+
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+ private static String byteToHexString(byte b) {
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+ int n = b;
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+ if (n < 0)
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+ n += 256;
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+ int d1 = n / 16;
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+ int d2 = n % 16;
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+ return hexDigits[d1] + hexDigits[d2];
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+ }
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+ public static String MD5Encode(String origin, String charsetname) {
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+ String resultString = null;
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+ try {
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+ resultString = new String(origin);
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+ MessageDigest md = MessageDigest.getInstance("MD5");
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+ if (charsetname == null || "".equals(charsetname))
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+ resultString = byteArrayToHexString(md.digest(resultString
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+ .getBytes()));
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+ else
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+ resultString = byteArrayToHexString(md.digest(resultString
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+ .getBytes(charsetname)));
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+ } catch (Exception exception) {
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+ }
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+ return resultString;
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+ }
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+ private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5",
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+ "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
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+}
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