JAVA 文档转图片

大胖鱼鱼
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PDF 转图片

package com.mashang.document;

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;

import javax.imageio.ImageIO;
import javax.imageio.stream.FileImageOutputStream;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import static org.apache.pdfbox.io.IOUtils.toByteArray;

public class PDF {


    public static void main(String[] args) {
        File file = new File("文件地址");
        PDFConvert(file);
    }

     static  void PDFConvert(File src)  {

         try {
             FileInputStream fileInputStream = new FileInputStream(src);
             byte[] data = toByteArray(fileInputStream);
             fileInputStream.close();
             List<byte[]> images = pdfToImage(data);
             int i = 1;
             for (byte[] image : images) {
                 //将每一个byte转为图片
                 byte2image(image,"D:\document\image\"+i++ +".png");
             }

         } catch (IOException e) {
             e.printStackTrace();
         }



     }

    public static void byte2image(byte[] data,String path){
        if(data.length<3||path.equals("")) return;
        try{
            FileImageOutputStream imageOutput = new FileImageOutputStream(new File(path));
            imageOutput.write(data, 0, data.length);
            imageOutput.close();
            System.out.println("Make Picture success,Please find image in " + path);
        } catch(Exception ex) {
            System.out.println("Exception: " + ex);
            ex.printStackTrace();
        }
    }

    /**
     * dpi越大转换后越清晰，相对转换速度越慢
     */
    private static final Integer DPI = 100;

    /**
     * 转换后的图片类型
     */
    private static final String IMG_TYPE = "png";

    /**
     * PDF转图片
     *
     * @param fileContent PDF文件的二进制流
     * @return 图片文件的二进制流
     */
    public static List<byte[]> pdfToImage(byte[] fileContent) throws IOException {
        List<byte[]> result = new ArrayList<>();
        try (PDDocument document = PDDocument.load(fileContent)) {
            PDFRenderer renderer = new PDFRenderer(document);
            for (int i = 0; i < document.getNumberOfPages(); ++i) {
                BufferedImage bufferedImage = renderer.renderImageWithDPI(i, DPI);
                ByteArrayOutputStream out = new ByteArrayOutputStream();
                ImageIO.write(bufferedImage, IMG_TYPE, out);
                result.add(out.toByteArray());
            }
        }
        return result;
    }
}

PPT 转图片

package com.mashang.document;


import org.apache.poi.hslf.usermodel.*;
import org.apache.poi.openxml4j.util.ZipSecureFile;
import org.apache.poi.xslf.usermodel.*;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;


public class PPT {
    public static void main(String[] args) throws IOException {
        File file = new File("文件地址");
        pptx2Png(file);
         
    }
    /**
     * ppt转为图片列表
     * @param pptFile 在（服务器）本地的ppt文件 比如：123.ppt
     * @return 转换后的图片集合
     */
    public static List<File> ppt2Png(File pptFile) {
        List<File> pngFileList = new ArrayList<>();
        long startTime = System.currentTimeMillis();

        FileInputStream is = null;
        // 将ppt文件转换成每一帧的图片
        HSLFSlideShow ppt = null;

        try {
            ZipSecureFile.setMinInflateRatio(-1.0d);
            is = new FileInputStream(pptFile);
            ppt = new HSLFSlideShow(is);
            int idx = 1;

            Dimension pageSize = ppt.getPageSize();
            double image_rate = 1.0;
            int imageWidth = (int) Math.floor(image_rate * pageSize.getWidth());
            int imageHeight = (int) Math.floor(image_rate * pageSize.getHeight());

            for (HSLFSlide slide : ppt.getSlides()) {
                BufferedImage img = new BufferedImage(imageWidth, imageHeight, BufferedImage.TYPE_INT_ARGB);
                Graphics2D graphics = img.createGraphics();
                graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
                graphics.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
                graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
                graphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
                // clear the drawing area
                graphics.setPaint(Color.white);
                graphics.fill(new Rectangle2D.Float(0, 0, imageWidth, imageHeight));
                graphics.scale(image_rate, image_rate);

                //防止中文乱码
                for (HSLFShape shape : slide.getShapes()) {
                    if (shape instanceof HSLFTextShape) {
                        HSLFTextShape hslfTextShape = (HSLFTextShape) shape;
                        for (HSLFTextParagraph hslfTextParagraph : hslfTextShape) {
                            for (HSLFTextRun hslfTextRun : hslfTextParagraph) {
                                hslfTextRun.setFontFamily("宋体");
                            }
                        }
                    }
                }

                FileOutputStream out = null;
                try {
                    slide.draw(graphics);
                    File pngFile = new File(pptFile.getPath().replace(".ppt", String.format("-%04d.png", idx++)));
                    out = new FileOutputStream(pngFile);
                    ImageIO.write(img, "png", out);
                    pngFileList.add(pngFile);
                } catch (Exception e) {
                    e.printStackTrace();
                    System.out.println("操作失败");
                } finally {
                    try {
                        if (out != null) {
                            out.flush();
                            out.close();
                        }

                        if (graphics != null) {
                            graphics.dispose();
                        }

                        if (img != null) {
                            img.flush();
                        }
                    } catch (IOException e) {
                        e.printStackTrace();
                        System.out.println("操作失败");
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("操作失败");
        } finally {
            try {
                if (is != null) {
                    is.close();
                }

                if (ppt != null) {
                    ppt.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
                System.out.println("操作失败");
            }
        }
        long endTime = System.currentTimeMillis();

        System.out.println("ppt2Png的时间：{}" + (endTime - startTime));
        return pngFileList;
    }

    public static List<File> pptx2Png(File pptxFile) {
        List<File> pngFileList = new ArrayList<>();
        long startTime = System.currentTimeMillis();
        FileInputStream is = null;
        // 将ppt文件转换成每一帧的图片
        XMLSlideShow pptx = null;

        try {
            ZipSecureFile.setMinInflateRatio(-1.0d);
            is = new FileInputStream(pptxFile);
            pptx = new XMLSlideShow(is);
            int idx = 1;

            Dimension pageSize = pptx.getPageSize();
            double image_rate = 2.0; //控制清晰程序
            int imageWidth = (int) Math.floor(image_rate * pageSize.getWidth());
            int imageHeight = (int) Math.floor(image_rate * pageSize.getHeight());

            for (XSLFSlide xslfSlide : pptx.getSlides()) {
                BufferedImage img = new BufferedImage(imageWidth, imageHeight, BufferedImage.TYPE_INT_BGR);
                Graphics2D graphics = img.createGraphics();
                graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
                graphics.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
                graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
                graphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
                // clear the drawing area
                graphics.setPaint(Color.white);
                graphics.fill(new Rectangle2D.Float(0, 0, imageWidth, imageHeight));
                graphics.scale(image_rate, image_rate);


                //防止中文乱码
                for (XSLFShape shape : xslfSlide.getShapes()) {
                    if (shape instanceof XSLFTextShape) {
                        XSLFTextShape xslfTextShape = (XSLFTextShape) shape;
                        for (XSLFTextParagraph xslfTextParagraph : xslfTextShape) {
                            for (XSLFTextRun xslfTextRun : xslfTextParagraph) {
                                xslfTextRun.setFontFamily("宋体");
                            }
                        }
                    }
                }

                FileOutputStream out = null;
                try {
                    xslfSlide.draw(graphics);
                    File pngFile = new File(pptxFile.getPath().replace(".pptx", String.format("-%04d.png", idx++)));
                    out = new FileOutputStream(pngFile);
                    ImageIO.write(img, "png", out);
                    pngFileList.add(pngFile);
                } catch (Exception e) {
                    e.printStackTrace();
                    System.out.println("操作失败");
                } finally {
                    try {
                        if (out != null) {
                            out.flush();
                            out.close();
                        }
                        if (graphics != null) {
                            graphics.dispose();
                        }
                        if (img != null) {
                            img.flush();
                        }
                    } catch (IOException e) {
                        e.printStackTrace();
                        System.out.println("操作失败");
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("操作失败");
        } finally {
            try {
                if (is != null) {
                    is.close();
                }

                if (pptx != null) {
                    pptx.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
                System.out.println("操作失败");
            }
        }
        long endTime = System.currentTimeMillis();
        System.out.println("pptx2Png耗时：{}"+(endTime - startTime) );
        return pngFileList;
    }


}

pom文件

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.18.20</version>
</dependency>
<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>pdfbox</artifactId>
    <version>2.0.20</version>
</dependency>


<!--poi依赖-->
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>4.1.1</version>
</dependency>
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>4.1.1</version>
</dependency>
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-scratchpad</artifactId>
    <version>4.1.1</version>
</dependency>
<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itextpdf</artifactId>
    <version>5.5.13.1</version>
</dependency>
<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>fontbox</artifactId>
    <version>2.0.18</version>
</dependency>

<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itext-asian</artifactId>
    <version>5.2.0</version>
</dependency>
<dependency>
    <groupId>org.apache.xmlgraphics</groupId>
    <artifactId>batik-bridge</artifactId>
    <version>1.12</version>
</dependency>

存在问题

PDF- 转换没有问题 PPT- 转换存在特效丢失问题

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