diff --git a/MD5Util.java b/MD5Util.java
deleted file mode 100644
index 05c3c28..0000000
--- a/MD5Util.java
+++ /dev/null
@@ -1,57 +0,0 @@
-package cn.edu.hactcm.util;
-
-import java.security.MessageDigest;
-
-public class MD5Util {
-
-    private static String byteArrayToHexString(byte b[]) {
-        StringBuffer resultSb = new StringBuffer();
-        for (int i = 0; i < b.length; i++)
-            resultSb.append(byteToHexString(b[i]));
-
-        return resultSb.toString();
-    }
-
-    private static String byteToHexString(byte b) {
-        int n = b;
-        if (n < 0)
-            n += 256;
-        int d1 = n / 16;
-        int d2 = n % 16;
-        return hexDigits[d1] + hexDigits[d2];
-    }
-
-    /**
-     * 返回大写MD5
-     *
-     * @param origin
-     * @param charsetname
-     * @return
-     */
-    private static String MD5Encode(String origin, String charsetname) {
-        String resultString = null;
-        try {
-            resultString = new String(origin);
-            MessageDigest md = MessageDigest.getInstance("MD5");
-            if (charsetname == null || "".equals(charsetname))
-                resultString = byteArrayToHexString(md.digest(resultString.getBytes()));
-            else
-                resultString = byteArrayToHexString(md.digest(resultString.getBytes(charsetname)));
-        } catch (Exception exception) {
-        }
-        return resultString.toUpperCase();
-    }
-
-    public static String MD5EncodeUtf8(String origin) {
-
-        //盐值Salt加密
-        //origin = origin + PropertiesUtil.getProperty("password.salt", "");
-        return MD5Encode(origin, "utf-8");
-    }
-
-
-    private static final String hexDigits[] = {"0", "1", "2", "3", "4", "5",
-            "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};
-
-}
-