ADD file via upload

src/main/java/com/utils/MD5Utils.java

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+package com.utils;
+
+import java.math.BigInteger;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * @ClassName MD5Utils
+ * @Description TODO
+ * @Author YHT
+ * @Date 2021/5/29 19:10
+ */
+public class MD5Utils {
+    public static String stringToMD5(String plainText) {
+        byte[] secretBytes = null;
+        try {
+            secretBytes = MessageDigest.getInstance("md5").digest(
+                    plainText.getBytes());
+        } catch (NoSuchAlgorithmException e) {
+            throw new RuntimeException("没有这个md5算法！");
+        }
+        String md5code = new BigInteger(1, secretBytes).toString(16);
+        for (int i = 0; i < 32 - md5code.length(); i++) {
+            md5code = "0" + md5code;
+        }
+        return md5code;
+    }
+}