<!--使用的是pdfbox计数总页数与缩略图-->
<!-- https://mvnrepository.com/artifact/com.sleepycat/je -->
<dependency>
<groupId>com.sleepycat</groupId>
<artifactId>je</artifactId>
<version>5.0.73</version>
</dependency>
<!--pdf-->
<!-- https://mvnrepository.com/artifact/org.apache.pdfbox/pdfbox -->
<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>pdfbox</artifactId>
<version>2.0.8</version>
</dependency>
二、实现代码
import lombok.extern.slf4j.Slf4j;
import org.apache.pdfbox.pdfparser.PDFParser;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;
import org.apache.pdfbox.text.PDFTextStripper;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriter;
import javax.imageio.stream.ImageOutputStream;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Iterator;
@Slf4j
public class PdfUtil {
* 通过PDFbox获取文章总页数
* @param filePath:文件路径
* @return
* @throws IOException
public static int getNumberOfPages(String filePath) throws IOException, InterruptedException {
File file = new File(filePath);
PDDocument pdDocument = PDDocument.load(new File(filePath));
int pages = pdDocument.getNumberOfPages();
pdDocument.close();
return pages;
* 通过PDFbox获取文章内容
* @param filePath
* @return
public static String getContent(String filePath) throws IOException {
PDFParser pdfParser = new PDFParser(new org.apache.pdfbox.io.RandomAccessFile(new File(filePath), "rw"));
pdfParser.parse();
PDDocument pdDocument = pdfParser.getPDDocument();
String text = new PDFTextStripper().getText(pdDocument);
pdDocument.close();
return text;
* 通过PDFbox生成文件的缩略图
* @param filePath：文件路径
* @param outPath：输出图片路径
* @throws IOException
public static void getThumbnails(String filePath, String outPath) throws IOException {
// 利用PdfBox生成图像
PDDocument pdDocument = PDDocument.load(new File(filePath));
PDFRenderer renderer = new PDFRenderer(pdDocument);
// 构造图片
BufferedImage img_temp = renderer.renderImageWithDPI(0, 30, ImageType.RGB);
// 设置图片格式
Iterator<ImageWriter> it = ImageIO.getImageWritersBySuffix("png");
// 将文件写出
ImageWriter writer = (ImageWriter) it.next();
ImageOutputStream imageout = ImageIO.createImageOutputStream(new FileOutputStream(outPath));
writer.setOutput(imageout);
writer.write(new IIOImage(img_temp, null, null));
img_temp.flush();
imageout.flush();
imageout.close();
//Warning: You did not close a PDF Document
pdDocument.close();
三、测试类--Main
public class Main {
public static void main(String[] args) throws IOException, InterruptedException {
int numberOfPages = getNumberOfPages("D:\\Desktop\\DocCloud\\testDir\\hadoopClientCode.pdf");
System.out.println(numberOfPages);
String content = getContent("");
System.out.println(content);
getThumbnails("D:\\Desktop\\DocCloud\\testDir\\hadoopClientCoed.pdf",
"D:\\Desktop\\DocCloud\\testDir\\hadoopClientCoed.pdf.png");
1>首先测试生成PDF文件的页码，在控制台可以看到
2>测试获取PDF文件的内容，在控制台可以看到--你自己PDF文件中的内容
3>测试生成PDF缩略图
缩略图的大小，可以在代码中修改
