diff --git a/.gitignore b/.gitignore
index 7d7cf3f..fa8f28b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,4 @@ target/
 .idea/
 *.iml
 .DS_Store
-*WeakkHash.java
+# *WeakkHash.java
diff --git a/src/main/java/com/newexample/WeakHash.java b/src/main/java/com/newexample/WeakHash.java
new file mode 100644
index 0000000..1478975
--- /dev/null
+++ b/src/main/java/com/newexample/WeakHash.java
@@ -0,0 +1,16 @@
+package com.newexample;
+
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+public class WeakHash {
+    public static String hashMD5(String data) throws NoSuchAlgorithmException {
+        MessageDigest md = MessageDigest.getInstance("MD5");
+        byte[] hashBytes = md.digest(data.getBytes());
+        StringBuilder sb = new StringBuilder();
+        for (byte b : hashBytes) {
+            sb.append(String.format("%02x", b));
+        }
+        return sb.toString();
+    }
+}
diff --git a/src/main/java/com/newexample/WeakkHash.java b/src/main/java/com/newexample/WeakkHash.java
new file mode 100644
index 0000000..e398f17
--- /dev/null
+++ b/src/main/java/com/newexample/WeakkHash.java
@@ -0,0 +1,16 @@
+package com.newexample;
+
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+public class WeakkHash {
+    public static String hashMD5(String data) throws NoSuchAlgorithmException {
+        MessageDigest md = MessageDigest.getInstance("MD5");
+        byte[] hashBytes = md.digest(data.getBytes());
+        StringBuilder sb = new StringBuilder();
+        for (byte b : hashBytes) {
+            sb.append(String.format("%02x", b));
+        }
+        return sb.toString();
+    }
+}