Java realizes the conversion of pdf into pictures

Original: https://blog.csdn.net/z991876960/article/details/82345057

1.maven add jar

<!-- 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/org.apache.pdfbox/pdfbox -->
		<dependency>
			<groupId>org.apache.pdfbox</groupId>
			<artifactId>pdfbox</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>

 2. Implementation code

 /**
     * 转换全部的pdf
     * @param fileAddress 文件地址
     * @param filename PDF文件名
     * @param type 图片类型
     */
    public static void pdf2png(String fileAddress,String filename,String type) {
        // 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, 144); // Windows native DPI
                // BufferedImage srcImage = resize(image, 240, 240);//产生缩略图
                ImageIO.write(image, type, new File(fileAddress+"\\"+filename+"_"+(i+1)+"."+type));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
 
 
/**
     *自由确定起始页和终止页
     * @param fileAddress 文件地址
     * @param filename pdf文件名
     * @param indexOfStart 开始页  开始转换的页码，从0开始
     * @param indexOfEnd 结束页  停止转换的页码，-1为全部
     * @param type 图片类型
     */
    public static void pdf2png(String fileAddress,String filename,int indexOfStart,int indexOfEnd,String type) {
        // 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, type, new File(fileAddress+"\\"+filename+"_"+(i+1)+"."+type));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }