java：编写jar包加密工具，防止反编译

发表时间：2022-03-26来源：网络

懒人方案

网盘：

链接：https://pan.baidu.com/s/1x4OB1IF2HZGgtLhd1Kr_AQ
提取码：glx7

网盘内是已生成可用工具，下载可以直接使用，使用前看一下READ.txt文件。

注意：此加密工具会把Class完全加密，jd-gui-1.4.0只能反编译出jar结构，但是看不到class文件源码！

Maven依赖

4.0.0 com.zy.java Util 1.0-SNAPSHOT org.springframework.boot spring-boot-starter-parent 1.5.6.RELEASE 1.8 com.github.core-lib xjar v1.1.4 org.apache.commons commons-compress 1.18 com.github.core-lib loadkit v1.0.0 org.springframework.boot spring-boot-maven-plugin 1.5.6.RELEASE true

java代码

package com.zy.java; import io.xjar.XConstants; import io.xjar.XKit; import io.xjar.boot.XBoot; import io.xjar.key.XKey; import java.awt.*; import javax.swing.*; import java.awt.event.*; import java.io.*; import java.security.NoSuchAlgorithmException; public class Practice{ private static String password = "你的加密密码"; private static JButton openItem, saveItem; private static FileDialog openDia, saveDia;// 定义“打开、保存”对话框 private static String filePathOld;//旧文件路径 private static String filePathNew;//新文件路径 private static String fileName;//文件名 static JFrame f = null; static JTextField locationText, typeText; public static void main(String[] args) { int gap = 5; f = new JFrame("加密程序"); ImageIcon icon = new ImageIcon("src\\images\\2.ico"); f.setIconImage(icon.getImage());// 给窗体设置图标方法 f.setSize(550, 310); f.setLocation(200, 200); f.setLayout(null); JPanel pInput = new JPanel(); pInput.setBounds(gap, gap, 520, 60); pInput.setLayout(new GridLayout(2, 3, gap, gap)); JLabel location = new JLabel("JAR路径:"); locationText = new JTextField(10); openItem = new JButton("选取");// 创建“打开"菜单项 JLabel type = new JLabel("保存路径:"); typeText = new JTextField(10); saveItem = new JButton("选取");// 创建“保存"菜单项 openDia = new FileDialog(f, "打开", FileDialog.LOAD); saveDia = new FileDialog(f, "保存", FileDialog.SAVE); JButton b = new JButton("生成"); pInput.add(location); pInput.add(locationText); pInput.add(openItem); pInput.add(type); pInput.add(typeText); pInput.add(saveItem); //文本域 final JTextArea ta = new JTextArea(); ta.setLineWrap(true); b.setBounds(220, 60 + 30, 80, 30); ta.setBounds(gap, 80 + 60, 523, 120); f.add(pInput); f.add(b); f.add(ta); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setVisible(true); myEvent(); //鼠标监听 b.addActionListener(new ActionListener() { boolean checkedpass = true; public void actionPerformed(ActionEvent e) { XKey xKey = null; System.out.println(" --- : "+fileName); String newPath = filePathNew+"\\"+fileName+"-xjar.jar"; String oldPath = filePathOld; try { xKey = XKit.key(password); XBoot.encrypt(oldPath, newPath, xKey, XConstants.MODE_DANGER); ta.append(" Success! "); } catch (NoSuchAlgorithmException eg) { eg.printStackTrace(); } catch (Exception eg) { eg.printStackTrace(); } checkedpass = true; checkEmpty(locationText, "JAR路径"); checkEmpty(typeText, "保存路径"); if (checkedpass) { String model = "加密jar包保存路径：%s"; String result = String.format(model, newPath); ta.setText(""); ta.append(result); } } //检验是否为空 private void checkEmpty(JTextField tf, String msg) { if (!checkedpass) return; String value = tf.getText(); if (value.length() == 0) { JOptionPane.showMessageDialog(f, msg + " 不能为空"); tf.grabFocus(); checkedpass = false; } } }); } //选取按钮监听 private static void myEvent() { // 选取监听 openItem.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { openDia.setVisible(true);//显示打开文件对话框 String dirpath = openDia.getDirectory();//获取打开文件路径并保存到字符串中。 String Name = openDia.getFile();//获取打开文件名称并保存到字符串中 System.out.println(" --- : " + Name.split(".jar")[0]); fileName = Name.split(".jar")[0]; filePathOld = dirpath+Name; if (dirpath == null || Name == null)//判断路径和文件是否为空 return; locationText.setText(dirpath+Name); } }); // 选取监听 saveItem.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { JFileChooser chooser = new JFileChooser(); chooser.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES); chooser.showDialog(new JLabel(), "选择"); File file = chooser.getSelectedFile(); if (file == null) { System.out.println(" 路径："+file.getAbsoluteFile().toString()); typeText.setText(file.getAbsoluteFile().toString()); filePathNew = file.getAbsoluteFile().toString(); }else{ System.out.println(" 路径："+file.getAbsoluteFile().toString()); typeText.setText(file.getAbsoluteFile().toString()); filePathNew = file.getAbsoluteFile().toString(); } } }); // 窗体关闭监听 f.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); } }

代码先进行打包，Maven ——> clean ——> install