pdf转图片以及内容读取

Posted 2022-11-26 w329636271

maven导入包

        <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>pdfbox</artifactId>
            <version>2.0.8</version>
        </dependency>
        <dependency>
            <groupId>com.sleepycat</groupId>
            <artifactId>je</artifactId>
            <version>5.0.73</version>
        </dependency>
        <dependency>
            <groupId>com.github.jai-imageio</groupId>
            <artifactId>jai-imageio-jpeg2000</artifactId>
            <version>1.3.0</version>
        </dependency>

PdfUtil.java

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.imageio.ImageIO;
import lombok.extern.slf4j.Slf4j;
import org.apache.pdfbox.pdfparser.PDFParser;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;
import org.apache.pdfbox.text.PDFTextStripper;

@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 getPdfImage(String filePath, String outPath) throws IOException 
    // 利用PdfBox生成图像
    List<String> list = new ArrayList<>();
    PDDocument pdDocument = PDDocument.load(new File(filePath));
    PDFRenderer renderer = new PDFRenderer(pdDocument);

    int pages = pdDocument.getNumberOfPages();
    for (int i = 0; i < pages; i++) 
      // 构造图片
      File file = new File(outPath);
      if (!file.exists()) 
        file.mkdirs();
      
      String fileName = outPath + "/" + (i + 1) + ".png";
      BufferedImage image = renderer.renderImageWithDPI(i, 96); // Windows native DPI
      ImageIO.write(image, "PNG", new File(fileName));
      list.add(fileName);
    
    // Warning: You did not close a PDF Document
    pdDocument.close();
  

测试代码

import java.io.IOException;
/**
 * */
public class PdfTest 
  public static void main(String[] args) throws IOException, InterruptedException 
    int numberOfPages =
        PdfUtil.getNumberOfPages("D:\\\\workspace\\\\service-api\\\\xyd-client\\\\data1.pdf");
    System.out.println(numberOfPages);
    String content = PdfUtil.getContent("D:\\\\workspace\\\\service-api\\\\xyd-client\\\\data1.pdf");
    System.out.println(content);
    PdfUtil.getPdfImage(
        "D:\\\\workspace\\\\service-api\\\\xyd-client\\\\data1.pdf",
        "D:\\\\workspace\\\\service-api\\\\xyd-client\\\\data1.pdf.png");