diff --git a/src/main/java/club/shengsheng/MyClassLoader.java b/src/main/java/club/shengsheng/MyClassLoader.java
index 21026cf..196a6b2 100644
--- a/src/main/java/club/shengsheng/MyClassLoader.java
+++ b/src/main/java/club/shengsheng/MyClassLoader.java
@@ -1,9 +1,49 @@
 package club.shengsheng;
 
 
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+
 /**
  * @author gongxuanzhangmelt@gmail.com
  **/
 public class MyClassLoader extends ClassLoader {
 
-}
+    @Override
+    protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
+        synchronized (getClassLoadingLock(name)) {
+            Class<?> c = findLoadedClass(name);
+
+            if (c == null) {
+                if (name.startsWith("tech.insight.ShengSheng")){
+                    c = findClass(name);
+
+                }else {
+                    c = getParent().loadClass(name);
+                }
+            }
+            if (resolve) {
+                resolveClass(c);
+            }
+            return c;
+        }
+    }
+
+    @Override
+    protected Class<?> findClass(String name)  {
+//        String path = name.replace(".", "/").concat(".class");
+//        File file = new File("/Users/ysj/IdeaProjects/custom-classloader", path);
+        File file = new File("./加密.class");
+        try {
+
+            byte[] bytes = Files.readAllBytes(file.toPath());
+            for (int i = 0; i < bytes.length; i++) {
+                bytes[i] -=1;
+            }
+            return defineClass(name,bytes,0,bytes.length);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}
\ No newline at end of file