如何实现对java生成的.class加密？

package com.encryption.demo;

/**
 * @description: 测试方法
 * @author hong
 * @date
 * @version 1.0
 */
public class TestContent {
    public void hong(){
        System.out.println("my name is hong!!!");
    }
}

package com.encryption.demo;
import java.io.*;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
 * 加解密工具
 */
public class EncryptionUtils extends ClassLoader{




    /**统一加密/解密 密钥 **/
    private int password = 0xFF;

    private static String parentPath ="D://";

    /**
     * 加密方法
     * @param pathUrl 类名称
     */
    public void encryptionClass(String pathUrl){
        if(null==pathUrl || "".equals(pathUrl)){
            System.out.println("路径不能为空！");
            return;
        }
        String path =new File(pathUrl).getAbsolutePath();

        //获取文件
        File file = new File(path);
        if(!file.exists()){
            throw new NoClassDefFoundError("没有找到文件！");
        }
        //获取文件夹目录
        File awaitFileFolder = new File(file.getParent() + File.separator);
        //不存在则创建目录
        if(!awaitFileFolder.exists()){
            awaitFileFolder.mkdirs();
        }
        File encryptFolder = new File(awaitFileFolder.getParent() + File.separator );
        if (!encryptFolder.exists()) {
            encryptFolder.mkdirs();
        }
        //加密后文件指定存放目录
// String encryptedFile = file.getParent() + File.separator + File.separator + file.getName();
        String encryptedFile = parentPath + file.getName();
        try (
                FileInputStream fileInputStream = new FileInputStream(file);
                BufferedInputStream bis = new BufferedInputStream(fileInputStream);
                FileOutputStream fileOutputStream = new FileOutputStream(encryptedFile);
                BufferedOutputStream bos = new BufferedOutputStream(fileOutputStream)
        ) {
            // 加密
            int data;
            while ((data = bis.read()) != -1) {
                bos.write(data ^ password);
            }
            bos.flush();
        } catch (IOException e) {
            System.out.println("加密异常！");
            e.printStackTrace();
        }
        // 现在将原来未加密的文件删除
       // awaitFileFolder.delete();

        // 先获取加密前文件绝对路径名，然后修改后缀，再创建File对象
        File oldFile = new File(parentPath +file.getName()+ "hong");
        // 删除未加密前的文件
// if (oldFile.exists()) {
// oldFile.delete();
// }
        // 根据加密后的文件创建File对象
        File newEncryptedFile = new File(encryptedFile);
        // 将加密后的对象重命名，这时加密后的文件就把加密前的文件替换掉了，这就是为什么刚开始加密后的文件需要单独放的原因
        newEncryptedFile.renameTo(oldFile);
        // 删除之前的加密文件夹下面的加密文件
        newEncryptedFile.getParentFile().delete();
    }

    /**
     * 解密方法
     * @param pathUrl 需要解密的文件名
     */
    protected byte[] decryptClass(String pathUrl) {
        String path;
        if (!pathUrl.contains(".class")) {
            path = new File(pathUrl).getAbsolutePath();
        } else {
            path = pathUrl;
        }
        //获取待解密文件
        File decryptClassFile = new File(path);
        if (!decryptClassFile.exists()) {
            System.out.println("decryptClass() File:" + path + " not found!");
            return null;
        }
        byte[] result = null;
        BufferedInputStream bis = null;
        ByteArrayOutputStream bos = null;
        try {
            bis = new BufferedInputStream(new FileInputStream(decryptClassFile));
            bos = new ByteArrayOutputStream();
            // 解密
            int data;
            while ((data = bis.read()) != -1) {
                bos.write(data ^ password);
            }
            bos.flush();
            result = bos.toByteArray();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (bis != null) {
                    bis.close();
                }
                if (bos != null) {
                    bos.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return result;
    }

    @Override
    protected Class<?> findClass(String name) throws ClassNotFoundException {
        byte[] bytes = decryptClass(name);
        int length = bytes ==null?0:bytes.length;
        return defineClass("com.encryption.demo.TestContent",bytes,0,length);
    }

    /**
     * 运行主类
     * @param args
     * @throws ClassNotFoundException
     */
    public static void main(String[] args) throws ClassNotFoundException {
        //获取项目路劲
        File file = new File(EncryptionUtils.class.getResource("/").getPath());
        //加解密工具
        EncryptionUtils encryptionUtils = new EncryptionUtils();
        //解析路劲
        encryptionUtils.encryptionClass(file.getPath()+"/com/encryption/demo/TestContent.class");
        //获取解析后的文件
        Class<?> c = encryptionUtils.findClass(parentPath+"/TestContent.classhong");
        if(c != null){
            try {
                Object obj = c.newInstance();
                //获取方法
                Method method = c.getDeclaredMethod("hong");
                //通过反射调用Test类的say方法
                method.invoke(obj);
            } catch (InstantiationException | IllegalAccessException
                    | NoSuchMethodException
                    | SecurityException |
                    IllegalArgumentException |
                    InvocationTargetException e) {
                e.printStackTrace();
            }
        }
    }

}

Connected to the target VM, address: '127.0.0.1:49636', transport: 'socket'
my name is hong!!!
Disconnected from the target VM, address: '127.0.0.1:49636', transport: 'socket'

Process finished with exit code 0