diff --git a/src/test/java/com/rymcu/forest/utils/TestFileMd5.java b/src/test/java/com/rymcu/forest/utils/TestFileMd5.java
new file mode 100644
index 0000000..5a5f2be
--- /dev/null
+++ b/src/test/java/com/rymcu/forest/utils/TestFileMd5.java
@@ -0,0 +1,26 @@
+package com.rymcu.forest.utils;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.util.DigestUtils;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.InputStream;
+
+public class TestFileMd5 {
+
+    /**
+     * c6c26c7e8a5eb493b14e84bd91df60e3
+     * d41d8cd98f00b204e9800998ecf8427e
+     *
+     * @throws Exception
+     */
+    @Test
+    public void test() throws Exception {
+        String pathName = "E:\\1.txt";
+        InputStream inputStream = new FileInputStream(new File(pathName));
+        String md5 = DigestUtils.md5DigestAsHex((inputStream));
+        System.err.println(md5);
+        System.err.println(md5.length());
+    }
+}