java打jar包并包装成exe解压即用

1首先找到要加载的main方法类

    public static void main(String[] args) {
//创建该对象则调用构造方法，对象实现ActionListener则自动调用actionPerformed（）方法
        new PicdealMain();
    }

2.点击 idea：File->Project Struce…(快捷键 ctrl + shift +alt +s)。如图：

3添加jar

3.1 选择启动类

4 编译打包

4.1 清理构建

二 下载exe4j工具

重点需要注意的如下：

如下图1为exe应用名字，2为图标log必须为ico格式，在32位还是64位运行自主选择

vm处可以自己设置大小
修改jvm参数可以写这个：
-Xmn128m -Xms1512m -Xmx1512m

重点来了

下方路径就是jre的路径，如果和应用同级可以直接写 .\bin (我是将jre文件夹名字改为了bin的看起好点)

前面也有设置需要是否输出日志自己选择下。
整体到此结束

这是我的一份读取图像扫描文件大小尺寸的代码

package org.example;

import com.alibaba.excel.EasyExcel;
import lombok.SneakyThrows;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.example.entity.HeadInfo;
import org.example.entity.PicInfo;
import org.example.FileUtil.ReadFile;

import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

/**
 * @ClassName： Picdeal
 * @Package： org.example
 * @Author： TangMei
 * @CreateTime： 17:10 2023/3/3
 * @Version 1.0
 * @Description： 这是一个相当有用的类
 **/
public class PicdealMain extends JFrame implements ActionListener {

    private String inpath;
    private String outpath;
    //窗口
    JFrame jf = new JFrame("计算图片大小（下方路径不可手动输入）");
    //画板
    JPanel jp = new JPanel();
    //布局卡选项
    JTabbedPane tabPane = new JTabbedPane();
    //布局1
    Container con = new Container();

    //标签
    JLabel jl1 = new JLabel("选择数据源");

    JLabel jl3 = new JLabel("选择输出目录");
    //按钮
    JButton jb1 = new JButton("···");

    JButton jb3 = new JButton("···");
    JButton jb4 = new JButton("启动程序");

    //文本
    JTextArea jt1 = new JTextArea();

    JTextArea jt3 = new JTextArea();
    //文件选择器
    JFileChooser chooser = new JFileChooser();

    public PicdealMain() {
//将画板加到窗口上
        //选择当前程序根目录
        chooser.setCurrentDirectory(new File(System.getProperty("user.dir")));
        jf.add(jp);
//布局，将布局卡加到面板上
        jf.setContentPane(tabPane);
//设置标签，按钮，文本框的位置及大小，x,y,width,height
        jl1.setBounds(20, 20, 100, 20);
        jb1.setBounds(640, 20, 50, 20);
        jt1.setBounds(120, 20, 500, 20);

        jl3.setBounds(20, 80, 100, 20);
        jb3.setBounds(640, 80, 50, 20);
        jt3.setBounds(120, 80, 500, 20);
        jb4.setBounds(300, 140, 100, 30);

//设置按钮事件处理   this代表本身这个对象，意思是监听这个对象，所里该类必须实现ActionListener
        jb1.addActionListener(this);
        //  jb2.addActionListener(this);
        jb3.addActionListener(this);
        jb4.addActionListener(this);
//将按钮加到布局1上
        con.add(jl1);
        con.add(jt1);
        con.add(jb1);

        con.add(jl3);
        con.add(jt3);
        con.add(jb3);
        con.add(jb4);
//将布局加到布局卡内，并设置该布局的名称
        tabPane.add("计算图片大小", con);
//设置窗口属性---------------------
//窗口可见
        jf.setVisible(true);
//窗口大小
        jf.setSize(800, 400);
//关闭窗口时关闭程序
        jf.setDefaultCloseOperation(EXIT_ON_CLOSE);
//设置窗口位置
        jf.setLocation(400, 150);
    }


    public static void main(String[] args) {
//创建该对象则调用构造方法，对象实现ActionListener则自动调用actionPerformed（）方法
        new PicdealMain();
    }


    //事件处理，所有事件处理必须写在该方法，该方法重写自ActionListener
    @SneakyThrows
    @Override
    public void actionPerformed(ActionEvent e) {

//点击按钮后，判断是哪一个按钮
        if (e.getSource() == jb1) {
//设置文件选择器只能选择0（文件），1（文件夹）
            chooser.setFileSelectionMode(1);
//打开文件浏览器，点击取消则返回1
            int status = chooser.showOpenDialog(null);
            if (status == 1) {
                return;
            } else {
//读取选择器选择到的文件
                File file = chooser.getSelectedFile();
//获取文件绝对路径并写入到文本框内
                jt1.setText(file.getAbsolutePath());

                inpath = file.getAbsolutePath();
            }
        }

        if (e.getSource() == jb3) {
            chooser.setFileSelectionMode(1);
            int status = chooser.showOpenDialog(null);
            if (status == 1) {
                return;
            } else {
                File file = chooser.getSelectedFile();
                if (file == null) {
                    file = new File(System.getProperty("user.dir"));
                }
                jt3.setText(file.getAbsolutePath());
                outpath = file.getAbsolutePath();
            }
        }
        if (e.getSource() == jb4) {

            new Thread() {

                @Override
                public void run() {
                    JOptionPane.showMessageDialog(null, "...", "提示-正在计算运行", JOptionPane.INFORMATION_MESSAGE);

                }
            }.start();


            if (outpath == null) {
                outpath = System.getProperty("user.dir");
            }

            System.err.println("inpath:" + inpath);
            System.err.println("outpath:" + outpath);

            try {

                //读取本地文件所有图片
                File file = new File(inpath);
                //数据持久化到D盘
                writeAllFile(file);
                JOptionPane.showMessageDialog(null, "计算完毕，已将结果输出到应用根目录或指定文件夹。。。", "提示", JOptionPane.PLAIN_MESSAGE);
            } catch (Exception ee) {
                JOptionPane.showMessageDialog(null, ee.getClass().getName() + "，请确定输入输出路径无异常", "提示", JOptionPane.YES_NO_OPTION);
                ee.printStackTrace();
            }

        }
    }

    public static void writeToXlsx2(List<PicInfo> picInfoList, String outPath) throws IOException, InvalidFormatException {
        boolean isExits = true;
        String filename = outPath + "\\result.xlsx";

        File file = new File(filename);

        if (!file.exists()) {
            isExits = false;
            file.createNewFile();
        }

        if (!isExits) {
            List<HeadInfo> headInfos = new ArrayList<>();
            FileOutputStream out = new FileOutputStream(filename);
            EasyExcel.write(out, HeadInfo.class)
                    .autoCloseStream(Boolean.TRUE)
                    .sheet("Sheet1")
                    .doWrite(headInfos);
        }

        FileInputStream fileInputStream = new FileInputStream(filename);
        XSSFWorkbook xssfWorkbook = new XSSFWorkbook(fileInputStream);
        XSSFSheet sheet = xssfWorkbook.getSheetAt(0);
        FileOutputStream fileOutputStream = new FileOutputStream(filename);

        for (PicInfo picInfo : picInfoList) {
            XSSFRow row = sheet.createRow(sheet.getLastRowNum() + 1);//新增一行
            XSSFCell cell1 = row.createCell(0);//行中的第“0+1”列
            cell1.setCellValue(picInfo.getName());//列中放的值
            XSSFCell cell2 = row.createCell(1);
            cell2.setCellValue(picInfo.getWidthCm());
            XSSFCell cell3 = row.createCell(2);
            cell3.setCellValue(picInfo.getHeightCm());
            XSSFCell cell4 = row.createCell(3);
            cell4.setCellValue(picInfo.getA401());
            XSSFCell cell5 = row.createCell(4);
            cell5.setCellValue(picInfo.getA402());
            XSSFCell cell6 = row.createCell(5);
            cell6.setCellValue(System.currentTimeMillis());
        }

        fileOutputStream.flush();
        xssfWorkbook.write(fileOutputStream);
        fileOutputStream.close();

    }

    private void writeAllFile(File file) throws IOException, InvalidFormatException {
        File[] files = file.listFiles();

        for (File f : files) {
            if (f.isDirectory()) {
                writeAllFile(f);
            } else {

                countSize(f.getAbsolutePath());
            }

        }

    }


    private void countSize(String fileNames) throws IOException, InvalidFormatException {


        List<PicInfo> PicList = new ArrayList<>();
        BufferedImage sourceImg;
        double width = 0.0;
        double height = 0.0;
        String suffix = ".JPG.JPEG.PNG.BMP";
        String s = fileNames;
        if (s.indexOf(".") == -1) {
            return;
        }

        String pos = s.substring(s.lastIndexOf(".")).toUpperCase();
        if (suffix.indexOf(pos) == -1) {
            return;
        }

        File picture = new File(s);
        PicInfo picInfo = new PicInfo();
        picInfo.setName(s);
        // 源图大小
        sourceImg = ImageIO.read(new FileInputStream(picture));

        //获取图片像素
        try {
            width = sourceImg.getWidth();
            height = sourceImg.getHeight();
        } catch (Exception e) {
            System.err.println("此扫描文件有异常已跳过："+s);
            return;
        }

        double area = 21 * 29.7;
        //获取图片的长宽
        picInfo.setWidthInch(width / 300);
        picInfo.setHeightInch(height / 300);
        picInfo.setWidthCm(picInfo.getWidthInch() * 2.54);
        picInfo.setHeightCm(picInfo.getHeightInch() * 2.54);
        PicList.add(picInfo);

        //等比计算纸张大小（A4） --按长宽
        if (width < height) {
            int a41 = (int) (Math.ceil(picInfo.getWidthCm() / 21) * Math.ceil(picInfo.getHeightCm() / 29.7));
            int a42 = (int) Math.ceil(picInfo.getWidthCm() * picInfo.getHeightCm() / area);
            picInfo.setA401(a41);
            picInfo.setA402(a42);
        } else {
            int a41 = (int) (Math.ceil(picInfo.getWidthCm() / 29.7) * Math.ceil(picInfo.getHeightCm() / 21));
            int a42 = (int) Math.ceil(picInfo.getWidthCm() * picInfo.getHeightCm() / area);
            picInfo.setA401(a41);
            picInfo.setA402(a42);
        }

        PicdealMain.writeToXlsx2(PicList, outpath);


    }

}

   <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.16</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>easyexcel</artifactId>
            <version>2.1.6</version>
        </dependency>
        <dependency>
            <groupId>net.sourceforge.jexcelapi</groupId>
            <artifactId>jxl</artifactId>
            <version>2.6.12</version>
        </dependency>

资源下载地址

https://download.csdn.net/download/weixin_44873668/87855674

点击下载-》exe4j