JAVA使用pdfbox将pdf转换成图片

Posted 2022-11-09 Share_Boy

使用的工具包：

pdfbox-1.8

fontbox-1.8

maven中导入：

<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>pdfbox</artifactId>
<version>1.8.10</version>
</dependency>

注意: 对要求过高项目不建议使用(转化过程中出现字符重叠现象).

下面看代码

package com.yqrt.core.pdf2img;

import java.awt.image.BufferedImage;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import java.util.List;

import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriter;
import javax.imageio.stream.ImageOutputStream;

import org.apache.pdfbox.exceptions.COSVisitorException;
import org.apache.pdfbox.pdfparser.PDFParser;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;

/**
 * Hello world!
 *
 */
public class App 

	
	public final  static String  IMG_TYPE_JPG = "jpg";
	public final  static String  IMG_TYPE_PNG = "png";
    public static void main( String[] args ) throws IOException
    
    		App app = new App();
    		app.pdf2img("D:\\\\api.pdf", "D:",IMG_TYPE_PNG);
//    		PDDocument pdDocument = app.pdfInfo("D:\\\\api.pdf");
    		
    	
        
    
    
    
    /**
     * 
     * @param pdfPath pdf文件的路径
     * @param savePath 图片保存的地址
     * @param imgType 图片保存方式
     */
    public void pdf2img(String pdfPath,String savePath,String imgType)
    	String fileName = pdfPath.substring(pdfPath.lastIndexOf("\\\\")+1, pdfPath.length());
    	fileName = fileName.substring(0,fileName.lastIndexOf("."));
    	InputStream  is = null;
    	PDDocument pdDocument = null; 
    	try 
        	is = new BufferedInputStream(new FileInputStream(pdfPath));
        	PDFParser parser = new PDFParser(is);
        	parser.parse();
        	pdDocument = parser.getPDDocument();
        	List<PDPage> pages = pdDocument.getDocumentCatalog().getAllPages();
        	for (int i = 0; i < pages.size(); i++) 
        		String saveFileName = savePath+"\\\\"+fileName+i+"."+imgType;
        		PDPage page =  pages.get(i);
        		pdfPage2Img(page,saveFileName,imgType);
			
		 catch (Exception e) 
			e.printStackTrace();
		finally
			if(pdDocument != null)
				try 
					pdDocument.close();
				 catch (IOException e) 
					e.printStackTrace();
				
			
		
    	
    	
    
    
    /**
     * pdf页转换成图片
     * @param page		
     * @param saveFileName
     * @throws IOException
     */
    public void pdfPage2Img(PDPage page,String saveFileName,String imgType) throws IOException
    	BufferedImage img_temp  = page.convertToImage();
    	Iterator<ImageWriter> it = ImageIO.getImageWritersBySuffix(imgType);
    	ImageWriter writer = (ImageWriter) it.next(); 
    	ImageOutputStream imageout = ImageIO.createImageOutputStream(new FileOutputStream(saveFileName));
    	writer.setOutput(imageout);
    	writer.write(new IIOImage(img_temp, null, null));
    
    
    
    
    public PDDocument pdfInfo(String filePath) throws IOException
    	InputStream  is  = new BufferedInputStream(new FileInputStream(filePath));
    	PDFParser parser = new PDFParser(is);
    	parser.parse();
    	PDDocument pdDocument =  parser.getPDDocument();
    	System.out.println("pageNum:"+pdDocument.getNumberOfPages());
    	return pdDocument;
    
    
    
    
    
    
    public void createPdf() throws COSVisitorException, IOException
    	PDDocument document = new PDDocument();
        PDPage blankPage = new PDPage();
        document.addPage(blankPage);
        document.save("D:\\\\test.pdf");
        document.close();