From 6caf2f815cbbfecdb69b90d976b5b83a2fd38458 Mon Sep 17 00:00:00 2001
From: Romesum <zhiyuewu@foxmail.com>
Date: Wed, 6 May 2020 17:32:56 +0800
Subject: [PATCH] =?UTF-8?q?[feat][M]:=E6=96=B0=E5=A2=9EMD5=E5=8A=A0?=
 =?UTF-8?q?=E5=AF=86=E5=B7=A5=E5=85=B7=E7=B1=BB?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../com/hzu/bookingsystem/utils/MD5Util.java  | 104 ++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 java/src/main/java/com/hzu/bookingsystem/utils/MD5Util.java

diff --git a/java/src/main/java/com/hzu/bookingsystem/utils/MD5Util.java b/java/src/main/java/com/hzu/bookingsystem/utils/MD5Util.java
new file mode 100644
index 0000000..f811c94
--- /dev/null
+++ b/java/src/main/java/com/hzu/bookingsystem/utils/MD5Util.java
@@ -0,0 +1,104 @@
+package com.hzu.bookingsystem.utils;
+
+import java.io.UnsupportedEncodingException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * 1.MD5加密字符串（32位大写）
+ * 2.MD5加密字符串（32位小写）
+ * 3.将二进制字节数组转换为十六进制字符串
+ * 4.Unicode中文编码转换成字符串
+ */
+public class MD5Util {
+
+    /**
+     * MD5加密字符串（32位大写）
+     *
+     * @param string 需要进行MD5加密的字符串
+     * @return 加密后的字符串（大写）
+     */
+    public static String md5Encrypt32Upper(String string) {
+        byte[] hash;
+        try {
+            //创建一个MD5算法对象，并获得MD5字节数组,16*8=128位
+            hash = MessageDigest.getInstance("MD5").digest(string.getBytes("UTF-8"));
+        } catch (NoSuchAlgorithmException e) {
+            throw new RuntimeException("Huh, MD5 should be supported?", e);
+        } catch (UnsupportedEncodingException e) {
+            throw new RuntimeException("Huh, UTF-8 should be supported?", e);
+        }
+
+        //转换为十六进制字符串
+        StringBuilder hex = new StringBuilder(hash.length * 2);
+        for (byte b : hash) {
+            if ((b & 0xFF) < 0x10) hex.append("0");
+            hex.append(Integer.toHexString(b & 0xFF));
+        }
+        return hex.toString().toUpperCase();
+    }
+
+    /**
+     * MD5加密字符串（32位小写）
+     *
+     * @param string 需要进行MD5加密的字符串
+     * @return 加密后的字符串（小写）
+     */
+    public static String md5Encrypt32Lower(String string) {
+        byte[] hash;
+        try {
+            //创建一个MD5算法对象，并获得MD5字节数组,16*8=128位
+            hash = MessageDigest.getInstance("MD5").digest(string.getBytes("UTF-8"));
+        } catch (NoSuchAlgorithmException e) {
+            throw new RuntimeException("Huh, MD5 should be supported?", e);
+        } catch (UnsupportedEncodingException e) {
+            throw new RuntimeException("Huh, UTF-8 should be supported?", e);
+        }
+
+        //转换为十六进制字符串
+        StringBuilder hex = new StringBuilder(hash.length * 2);
+        for (byte b : hash) {
+            if ((b & 0xFF) < 0x10) hex.append("0");
+            hex.append(Integer.toHexString(b & 0xFF));
+        }
+        return hex.toString().toLowerCase();
+    }
+
+    /**
+     * 将二进制字节数组转换为十六进制字符串
+     *
+     * @param bytes 二进制字节数组
+     * @return 十六进制字符串
+     */
+    public static String bytesToHex(byte[] bytes) {
+        StringBuffer hexStr = new StringBuffer();
+        int num;
+        for (int i = 0; i < bytes.length; i++) {
+            num = bytes[i];
+            if (num < 0) {
+                num += 256;
+            }
+            if (num < 16) {
+                hexStr.append("0");
+            }
+            hexStr.append(Integer.toHexString(num));
+        }
+        return hexStr.toString().toUpperCase();
+    }
+
+    /**
+     * Unicode中文编码转换成字符串
+     */
+    public static String unicodeToString(String str) {
+        Pattern pattern = Pattern.compile("(\\\\u(\\p{XDigit}{4}))");
+        Matcher matcher = pattern.matcher(str);
+        char ch;
+        while (matcher.find()) {
+            ch = (char) Integer.parseInt(matcher.group(2), 16);
+            str = str.replace(matcher.group(1), ch + "");
+        }
+        return str;
+    }
+}