java 多页pdf转化为多张图片

相关jar包：

<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itext-asian</artifactId>
<version>5.2.0</version>
</dependency>
<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>pdfbox</artifactId>
<version>2.0.0</version>
</dependency>
<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>fontbox</artifactId>
<version>2.0.0</version>
</dependency>
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itextpdf</artifactId>
<version>5.5.13</version>
</dependency>


相关代码：

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;
import java.util.UUID;import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;/**
* 将多页pdf转化为多张图片
* @param pdfPath 表示pdf的路径
* @return 转化后的图片的路径集合
* @throws IOException
*/
public static List<String> pdfPathToImagePaths(String pdfPath) throws IOException {
log.info("将多页pdf转化为图片，pdf路径为："+pdfPath);
File pdfFile = new File(pdfPath);
PDDocument pdDocument = PDDocument.load(pdfFile);
int pageCount = pdDocument.getNumberOfPages();
PDFRenderer pdfRenderer = new PDFRenderer(pdDocument);
List<String> imagePathList=new ArrayList<>();
String fileParent = pdfFile.getParent();
for (int pageIndex=0; pageIndex<pageCount; pageIndex++) {
String imgPath = fileParent + File.separator +UUID.randomUUID().toString()+".png";
BufferedImage image = pdfRenderer.renderImageWithDPI(pageIndex, 105, ImageType.RGB);
ImageIO.write(image, "png", new File(imgPath));
imagePathList.add(imgPath);
log.info("第{}张生成的图片路径为：{}",pageIndex,imgPath);
}
pdDocument.close();
return imagePathList;
}


这里的UUID.randomUUID()是产生一个随机的32位数字字母，作为文件名。

也可以自己去找些工具类，或者改用具体的时间作为文件名。

参考资料：

https://blog.csdn.net/u013405574/article/details/51086186