一、导入依赖

<!-- https://mvnrepository.com/artifact/org.apache.pdfbox/pdfbox -->
<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>pdfbox</artifactId>
    <version>2.0.9</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.pdfbox/fontbox -->
<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>fontbox</artifactId>
    <version>2.0.9</version>
</dependency>
<!-- https://mvnrepository.com/artifact/commons-logging/commons-logging -->
<dependency>
    <groupId>commons-logging</groupId>
    <artifactId>commons-logging</artifactId>
    <version>1.2</version>
</dependency>
<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>jbig2-imageio</artifactId>
    <version>3.0.2</version>
</dependency>

二、代码实现

package com.example.pdf_box_to_images.contorller;

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;

/**
 * @author Wss8752@qq.com
 * @version 1.0
 * @date 2021/10/15 下午4:19
 */
public class PdfToImages {
    //可*确定起始页和终止页
    public static void pdf2png(String fileAddress, String filename, int indexOfStart, int indexOfEnd) {
        // 将pdf装图片 并且自定义图片得格式大小
        File file = new File(fileAddress + "/" + filename + ".pdf");
        try {
            PDDocument doc = PDDocument.load(file);
            PDFRenderer renderer = new PDFRenderer(doc);
            int pageCount = doc.getNumberOfPages();
            for (int i = indexOfStart; i < indexOfEnd; i++) {
                BufferedImage image = renderer.renderImageWithDPI(i, 144); // Windows native DPI
                // BufferedImage srcImage = resize(image, 240, 240);//产生缩略图
                ImageIO.write(image, "PNG", new File(fileAddress + "/images/" + filename + "_" + (i + 1) + ".png"));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    //转换全部的pdf
    public static void pdf2png(String fileAddress, String filename) {
        // 将pdf装图片 并且自定义图片得格式大小
        File file = new File(fileAddress + "/" + filename + ".pdf");
        try {
            PDDocument doc = PDDocument.load(file);
            PDFRenderer renderer = new PDFRenderer(doc);
            int pageCount = doc.getNumberOfPages();
            for (int i = 0; i < pageCount; i++) {
                BufferedImage image = renderer.renderImageWithDPI(i, 250); // Windows native DPI
                // BufferedImage srcImage = resize(image, 240, 240);//产生缩略图
                ImageIO.write(image, "PNG", new File(fileAddress + "/images/" + filename + "_" + (i + 1) + ".png"));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        String fileAddress = "/home/kv/IdeaProjects/MarkVeriousTests2/PdfBoxToImages/src/main/resources";
        String filename = "Safety, Efficacy, and Pharmacokinetics of Almo";
        int indexOfStart = 0;//开始转换的页码
        int indexOfEnd = -1;//停止转换的页码，-1为全部
        if (indexOfEnd == -1) {
            pdf2png(fileAddress, filename);
        } else {
            pdf2png(fileAddress, filename, indexOfStart, indexOfEnd);
        }

    }
}