pdf转图片以及内容读取

maven导入包

        
            org.apache.pdfbox
            pdfbox
            2.0.8
        
        
            com.sleepycat
            je
            5.0.73
        
        
            com.github.jai-imageio
            jai-imageio-jpeg2000
            1.3.0
        

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 {

  
  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;
  }

  
  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;
  }

  
  public static void getPdfImage(String filePath, String outPath) throws IOException {
    // 利用PdfBox生成图像
    List 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");
  }
}