JAVA PDF转图片

迈不过友情╰ 2024-03-31 17:50 47阅读 0赞

**目录**

引入 JAR 包

代码样例

--------------------

## 引入 JAR 包 ##

SpringBoot 项目在Maven pom中引入

<dependency>
        <groupId>org.apache.pdfbox</groupId>
        <artifactId>fontbox</artifactId>
        <version>2.0.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.pdfbox</groupId>
        <artifactId>pdfbox</artifactId>
        <version>2.0.1</version>
    </dependency>
    <dependency>
        <groupId>com.lowagie</groupId>
        <artifactId>itext</artifactId>
        <version>2.1.7</version>
    </dependency>

## 代码样例 ##

package com.link.jiandanbiao.common.util;
    
    import com.lowagie.text.pdf.PdfReader;
    import org.apache.pdfbox.pdmodel.PDDocument;
    import org.apache.pdfbox.rendering.PDFRenderer;
    import javax.imageio.ImageIO;
    import java.awt.image.BufferedImage;
    import java.io.File;
    import java.io.IOException;
    
    public class PdfToImage {
        public static void main(String[] args) {
           pdf2Image("F:\\简历.pdf", "F:\\pdf2Image");
        }
    
        /**
         * @param PdfFilePath  pdf路径
         * @param dstImgFolder
         */
        public static void pdf2Image(String PdfFilePath, String dstImgFolder) {
            File file = new File(PdfFilePath);
            PDDocument pdDocument;
            try {
                String imgPDFPath = file.getParent();
                int dot = file.getName().lastIndexOf('.');
                String imagePDFName = file.getName().substring(0, dot); // 获取图片文件名
                String imgFolderPath = null;
                if (dstImgFolder.equals("")) {
                    imgFolderPath = imgPDFPath + File.separator + imagePDFName;// 获取图片存放的文件夹路径
                } else {
                    imgFolderPath = dstImgFolder + File.separator + imagePDFName;
                }
    
                if (createDirectory(imgFolderPath)) {
    
                    pdDocument = PDDocument.load(file);
                    PDFRenderer renderer = new PDFRenderer(pdDocument);
                    /* dpi越大转换后越清晰，相对转换速度越慢 */
                    PdfReader reader = new PdfReader(PdfFilePath);
                    int pages = reader.getNumberOfPages();
                    StringBuffer imgFilePath = null;
                    for (int i = 0; i < pages; i++) {
                        String imgFilePathPrefix = imgFolderPath + File.separator + imagePDFName;
                        imgFilePath = new StringBuffer();
                        imgFilePath.append(imgFilePathPrefix);
                        imgFilePath.append("_");
                        imgFilePath.append(String.valueOf(i + 1));
                        imgFilePath.append(".png");
                        File dstFile = new File(imgFilePath.toString());
                        BufferedImage image = renderer.renderImageWithDPI(i, 300);
                        ImageIO.write(image, "png", dstFile);
                        System.out.println("正在转码,请稍后....");
                    }
                    System.out.println("PDF文档转PNG图片成功！");
                } else {
                    System.out.println("PDF文档转PNG图片失败：" + "创建" + imgFolderPath + "失败");
                }
    
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    
        /**
         * @param file  pdf文件
         * @param dstImgFolder
         */
        public static void pdf2ImageByFile(File file, String dstImgFolder) {
            PDDocument pdDocument;
            try {
                String imgPDFPath = file.getParent();
                int dot = file.getName().lastIndexOf('.');
                String imagePDFName = file.getName().substring(0, dot); // 获取图片文件名
                String imgFolderPath = null;
                if (dstImgFolder.equals("")) {
                    imgFolderPath = imgPDFPath + File.separator + imagePDFName;// 获取图片存放的文件夹路径
                } else {
                    imgFolderPath = dstImgFolder + File.separator + imagePDFName;
                }
    
                if (createDirectory(imgFolderPath)) {
    
                    pdDocument = PDDocument.load(file);
                    PDFRenderer renderer = new PDFRenderer(pdDocument);
                    /* dpi越大转换后越清晰，相对转换速度越慢 */
                    PdfReader reader = new PdfReader(file.getPath());
                    int pages = reader.getNumberOfPages();
                    StringBuffer imgFilePath = null;
                    for (int i = 0; i < pages; i++) {
                        String imgFilePathPrefix = imgFolderPath + File.separator + imagePDFName;
                        imgFilePath = new StringBuffer();
                        imgFilePath.append(imgFilePathPrefix);
                        imgFilePath.append("_");
                        imgFilePath.append(String.valueOf(i + 1));
                        imgFilePath.append(".png");
                        File dstFile = new File(imgFilePath.toString());
                        BufferedImage image = renderer.renderImageWithDPI(i, 300);
                        ImageIO.write(image, "png", dstFile);
                        System.out.println("正在转码,请稍后....");
                    }
                    System.out.println("PDF文档转PNG图片成功！");
    
                } else {
                    System.out.println("PDF文档转PNG图片失败：" + "创建" + imgFolderPath + "失败");
                }
    
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    
        private static boolean createDirectory(String folder) {
            File dir = new File(folder);
            if (dir.exists()) {
                return true;
            } else {
                return dir.mkdirs();
            }
        }
    }