Word、Excel、PPT转PDF，dwg转svg或png

转pdf的方式有很多，有的依赖windows环境，有的需要在服务器上部署插件，有的转换效果不好，转换效果好又不依赖插件的付费，几经对比采用aspost方式进行文件转换，aspost是付费服务，本文提供破解方式，仅供学习探讨，商业用途需购买许可。

一.导入依赖

1.jar资源下载

链接：https://pan.baidu.com/s/1AMlmFzmuoNm2JGQrTk340g

提取码：1129

2.jar包引入

付费jar包无法直接通过maven下载，需将下载好的jar包放在本地maven资源库中，部署到服务器时也需将jar包上传至服务器资源库。

        <!-- aspose-PPT操作依赖 -->
        <dependency>
            <groupId>com.aspose</groupId>
            <artifactId>aspose.slides</artifactId>
            <version>19.3</version>
        </dependency>
        <!-- aspose-Excel操作依赖 -->
        <dependency>
            <groupId>com.aspose</groupId>
            <artifactId>aspose-cells</artifactId>
            <version>8.5.2</version>
        </dependency>
        <!-- aspose-Word操作依赖 -->
        <dependency>
            <groupId>com.aspose</groupId>
            <artifactId>aspose-words</artifactId>
            <version>14.9.0-jdk16</version>
        </dependency>
        <!-- aspose-CAD操作依赖 -->
        <dependency>
            <groupId>com.aspose</groupId>
            <artifactId>aspose-cad</artifactId>
            <version>22.7</version>
        </dependency>

3.jar包发送至服务器资源库

参考：https://blog.csdn.net/secretdaixin/article/details/129041068

二.文件转换工具类

1.Word转PDF

package com.dmp.common.utils.file;

import cn.hutool.core.io.FileUtil;
import com.aspose.words.Document;
import com.aspose.words.SaveFormat;
import lombok.extern.slf4j.Slf4j;

import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * @author daixin
 * @version 1.0
 * @description: TODO
 * @date 2023/2/14 15:05
 */
@Slf4j
public class WordToPdfUtils {
    public static Boolean convert(File sourceFile, File targetFile) {
        InputStream inputStream = FileUtil.getInputStream(sourceFile);
        OutputStream outputStream = FileUtil.getOutputStream(targetFile);
        return convert(inputStream, outputStream);
    }
    public static Boolean convert(InputStream inputStream, OutputStream outputStream) {
        try {
            Document doc = new Document(inputStream);
            doc.save(outputStream, SaveFormat.PDF);
            return true;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}

2.Excel转PDF

package com.dmp.common.utils.file;

import cn.hutool.core.io.FileUtil;
import com.aspose.cells.*;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;

import java.io.*;
import java.util.Iterator;

/**
 * @author daixin
 * @version 1.0
 * @description: TODO
 * @date 2023/2/14 15:09
 */
@Slf4j
public class CellToPdfUtils {

    /**
     * aspose插件的证书
     */
    private static final String myLicense = "<License><Data><Products><Product>Aspose.Total for Java</Product><Product>Aspose.Words for Java</Product></Products><EditionType>Enterprise</EditionType><SubscriptionExpiry>20991231</SubscriptionExpiry><LicenseExpiry>20991231</LicenseExpiry><SerialNumber>8bfe198c-7f0c-4ef8-8ff0-acc3237bf0d7</SerialNumber></Data><Signature>sNLLKGMUdF0r8O1kKilWAGdgfs2BvJb/2Xp8p5iuDVfZXmhppo+d0Ran1P9TKdjV4ABwAgKXxJ3jcQTqE/2IRfqwnPf8itN8aFZlV3TJPYeD3yWE7IT55Gz6EijUpC7aKeoohTb4w2fpox58wWoF3SNp6sK6jDfiAUGEHYJ9pjU=</Signature></License>";

    public static void convert(File sourceFile, File targetFile) {
        InputStream inputStream = FileUtil.getInputStream(sourceFile);
        OutputStream outputStream = FileUtil.getOutputStream(targetFile);
        convert(inputStream, outputStream);
    }
    public static void convert(InputStream inputStream, OutputStream outputStream) {
        try {
            getCellLicense();
            cellConvert2PDF(inputStream,outputStream);
            //Workbook workbook = new Workbook(sourceFile.getAbsolutePath());
            //workbook.save(targetFile.getAbsolutePath(), com.aspose.cells.SaveFormat.PDF);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public static void cellConvert2PDF(InputStream inputStream, OutputStream outputStream) {
        try {
            Workbook wb = new Workbook(inputStream);
            Iterator<Worksheet> iterator = wb.getWorksheets().iterator();
            while (iterator.hasNext()){
                Worksheet next = iterator.next();
                setColumnWithAuto(next);
            }
            PdfSaveOptions saveOptions = new PdfSaveOptions();
            saveOptions.setAllColumnsInOnePagePerSheet(true);
            wb.save(outputStream, saveOptions);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    /**
     * 设置表页的列宽度自适应
     * @param sheet
     */
    @SneakyThrows
    private static void setColumnWithAuto(Worksheet sheet) {
        Cells cells = sheet.getCells();
        int columnCount = cells.getMaxColumn() + 1;//获取表页的最大列数
        int rowCount = cells.getMaxRow();//获取表页的最大行数
        for (int col = 0; col < columnCount; col++) {
            sheet.autoFitColumn(col, 0, rowCount);
        }
        for (int col = 0; col < columnCount; col++) {
            int pixel = cells.getColumnWidthPixel(col) + 30;
            if (pixel > 255) {
                cells.setColumnWidthPixel(col, 255);
            } else {
                cells.setColumnWidthPixel(col, pixel);
            }
        }
    }


    public static boolean getCellLicense() throws IOException {
        boolean result = false;
        ByteArrayInputStream licenseInputStream = null;
        try {
            /*String file = FileConversionUtils.class.getClassLoader().getResource("license.xml").getFile();
            com.aspose.cells.License aposeLic = new com.aspose.cells.License();
            aposeLic.setLicense(new FileInputStream(file));*/
            licenseInputStream = new ByteArrayInputStream(myLicense.getBytes());
            com.aspose.cells.License wordLicense = new com.aspose.cells.License();
            wordLicense.setLicense(licenseInputStream);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            licenseInputStream.close();
        }
        return result;
    }
}

3.PPT转PDF

package com.dmp.common.utils.file;

import cn.hutool.core.io.FileUtil;
import com.aspose.slides.Presentation;
import lombok.extern.slf4j.Slf4j;

import java.io.*;

/**
 * @author daixin
 * @version 1.0
 * @description: TODO
 * @date 2023/2/14 15:12
 */
@Slf4j
public class PowerPointToPdfUtils {

    /**
     * aspose插件的证书
     */
    private static final String myLicense = "<License><Data><Products><Product>Aspose.Total for Java</Product><Product>Aspose.Words for Java</Product></Products><EditionType>Enterprise</EditionType><SubscriptionExpiry>20991231</SubscriptionExpiry><LicenseExpiry>20991231</LicenseExpiry><SerialNumber>8bfe198c-7f0c-4ef8-8ff0-acc3237bf0d7</SerialNumber></Data><Signature>sNLLKGMUdF0r8O1kKilWAGdgfs2BvJb/2Xp8p5iuDVfZXmhppo+d0Ran1P9TKdjV4ABwAgKXxJ3jcQTqE/2IRfqwnPf8itN8aFZlV3TJPYeD3yWE7IT55Gz6EijUpC7aKeoohTb4w2fpox58wWoF3SNp6sK6jDfiAUGEHYJ9pjU=</Signature></License>";

    public static Boolean convert(File sourceFile, File targetFile) {
        InputStream inputStream = FileUtil.getInputStream(sourceFile);
        OutputStream outputStream = FileUtil.getOutputStream(targetFile);
        return convert(inputStream, outputStream);
    }
    public static Boolean convert(InputStream inputStream, OutputStream outputStream) {
        try {
            getPPtLicense();
            Presentation pres = new Presentation(inputStream);
            pres.save(outputStream, com.aspose.slides.SaveFormat.Pdf);
            return true;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
    public static boolean getPPtLicense() throws IOException {
        boolean result = false;
        ByteArrayInputStream licenseInputStream = null;
        try {
            licenseInputStream = new ByteArrayInputStream(myLicense.getBytes());
            com.aspose.slides.License aposeLic = new com.aspose.slides.License();
            aposeLic.setLicense(licenseInputStream);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            licenseInputStream.close();
        }
        return result;
    }
}

4.dwg转svg/png

package com.dmp.common.utils.file;

import cn.hutool.core.io.FileUtil;
import com.aspose.cad.Image;
import com.aspose.cad.fileformats.cad.CadDrawTypeMode;
import com.aspose.cad.fileformats.cad.CadImage;
import com.aspose.cad.imageoptions.CadRasterizationOptions;
import com.aspose.cad.imageoptions.PngOptions;
import com.aspose.cad.imageoptions.SvgOptions;

import java.io.InputStream;
import java.io.OutputStream;

/**
 * @author daixin
 * @version 1.0
 * @description: TODO
 * @date 2023/2/14 15:12
 */
public class CADFileUtils {

    /**
     * dwg转换成png
     * @param sourcePath
     * @param targetPath
     */
    public static void dwgToPng(String sourcePath,String targetPath){
        InputStream inputStream = FileUtil.getInputStream(sourcePath);
        OutputStream outputStream = FileUtil.getOutputStream(targetPath);
        dwgToPng(inputStream, outputStream);
    }

    /**
     * dwg转换成png
     * @param inputStream
     * @param outputStream
     */
    public static void dwgToPng(InputStream inputStream, OutputStream outputStream){
        PngOptions pngOptions = new PngOptions();
        // 设置png的压缩等级 0 最低 9 最高
        pngOptions.setCompressionLevel(0);
        CadImage image = (CadImage)CadImage.load(inputStream);
        CadRasterizationOptions cadRasterizationOptions = new CadRasterizationOptions();
        //等比缩放
        uniformScale(image,cadRasterizationOptions);
        cadRasterizationOptions.setDrawType(CadDrawTypeMode.UseObjectColor);
        pngOptions.setVectorRasterizationOptions(cadRasterizationOptions);
        image.save(outputStream, pngOptions);
    }

    /**
     * dwg转换成Svg
     * @param sourcePath
     * @param targetPath
     */
    public static void dwgToSvg(String sourcePath,String targetPath){
        InputStream inputStream = FileUtil.getInputStream(sourcePath);
        OutputStream outputStream = FileUtil.getOutputStream(targetPath);
        dwgToSvg(inputStream, outputStream);
    }

    /**
     * dwg转换成Svg
     * @param inputStream
     * @param outputStream
     */
    public static void dwgToSvg(InputStream inputStream, OutputStream outputStream){
        SvgOptions options = new SvgOptions();
        Image image = Image.load(inputStream);
        CadRasterizationOptions cadRasterizationOptions = new CadRasterizationOptions();
        //等比缩放
        uniformScale(image,cadRasterizationOptions);
        cadRasterizationOptions.setDrawType(CadDrawTypeMode.UseObjectColor);
        options.setVectorRasterizationOptions(cadRasterizationOptions);
        image.save(outputStream,options);
    }

    /**
     * 等比缩放
     * @param image
     * @param cadRasterizationOptions
     */
    private static void uniformScale(Image image, CadRasterizationOptions cadRasterizationOptions){
        double width = image.getWidth();
        double height = image.getHeight();
        double baseNum = 2073600;
        double zoom = Math.sqrt(baseNum / width / height);

        cadRasterizationOptions.setPageHeight((int)(height * zoom));
        cadRasterizationOptions.setPageWidth((int)(width * zoom));
    }
}