Java实现pdf转图片，支持单个pdf文件和多个pdf文件

刺骨的言语ヽ痛彻心扉 2023-01-21 11:16 132阅读 0赞

Java实现pdf转图片，分享给大家

pom.xml内容为：

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>pdf2img</groupId>
        <artifactId>pdf2img</artifactId>
        <version>1.0-SNAPSHOT</version>
        <dependencies>
            <dependency>
                <groupId>org.apache.pdfbox</groupId>
                <artifactId>pdfbox</artifactId>
                <version>2.0.4</version>
            </dependency>
        </dependencies>
    </project>

单个pdf文件转图片Java代码如下：

public static List<String> pdfToImagePath(String filePath) {
            List<String> list = new ArrayList<String>();
            String fileDirectory = filePath.substring(0, filePath.lastIndexOf("."));//获取去除后缀的文件路径
    
            String imagePath;
            File file = new File(filePath);
            try {
                File f = new File(fileDirectory);
                if (!f.exists()) {
                    f.mkdir();
                }
                PDDocument doc = PDDocument.load(file);
                PDFRenderer renderer = new PDFRenderer(doc);
                int pageCount = doc.getNumberOfPages();
                for (int i = 0; i < pageCount; i++) {
                    // 方式1,第二个参数是设置缩放比(即像素)
                    // BufferedImage image = renderer.renderImageWithDPI(i, 296);
                    // 方式2,第二个参数是设置缩放比(即像素)
                    BufferedImage image = renderer.renderImage(i, 1.25f);  //第二个参数越大生成图片分辨率越高，转换时间也就越长
                    imagePath = fileDirectory + "/" + i + ".jpg";
                    ImageIO.write(image, "PNG", new File(imagePath));
                    list.add(imagePath);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
            return list;
        }

多个pdf文件转图片Java代码如下：

public static void main(String[] args) {
    
            ArrayList<String> list=getDirPathFiles("D:\\pdf\\3");
            for(int i=0;i<list.size();i++){
                try {
                    String filePath = list.get(i);
                    System.out.println(list.size() + "//" + i + "//" + filePath);
                    pdfToImagePath(filePath, "D:\\pdf\\3save", "3-"+i + "");
                }catch (Exception e){
                    e.printStackTrace();
                    continue;
                }
            }
        }
        public static List<String> pdfToImagePath(String filePath,String savePath,String subStr) {
            List<String> list = new ArrayList<String>();
            String fileDirectory = filePath.substring(0, filePath.lastIndexOf("."));//获取去除后缀的文件路径
    
            String imagePath;
            File file = new File(filePath);
            try {
                File f = new File(fileDirectory);
                if (!f.exists()) {
                    f.mkdir();
                }
                PDDocument doc = PDDocument.load(file);
                PDFRenderer renderer = new PDFRenderer(doc);
                int pageCount = doc.getNumberOfPages();
                for (int i = 0; i < pageCount; i++) {
                    // 方式1,第二个参数是设置缩放比(即像素)
                    // BufferedImage image = renderer.renderImageWithDPI(i, 296);
                    // 方式2,第二个参数是设置缩放比(即像素)
                    BufferedImage image = renderer.renderImage(i, 1.25f);  //第二个参数越大生成图片分辨率越高，转换时间也就越长
                    imagePath = savePath + "/"+subStr+"-" + i + ".jpg";
                    ImageIO.write(image, "PNG", new File(imagePath));
                    list.add(imagePath);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            return list;
        }
    
       //获取文件夹下所有文件
        public static ArrayList getDirPathFiles(String path) {
            ArrayList files = new ArrayList<String>();
            File file = new File(path);
            File[] tempList = file.listFiles();
    
            for (int i = 0; i < tempList.length; i++) {
                if (tempList[i].isFile()) {
                    files.add(tempList[i].toString());
                }
            }
            return files;
        }

完整idea项目地址 [http://www.zrscsoft.com/sitepic/12134.html][http_www.zrscsoft.com_sitepic_12134.html]

[http_www.zrscsoft.com_sitepic_12134.html]: http://www.zrscsoft.com/sitepic/12134.html