使用pdfbox分页保存pdf为图片

1 //添加pdfbox的依赖
2 compile(‘org.apache.pdfbox:pdfbox:2.0.7‘)

1 <dependency>
2   <groupId>org.apache.pdfbox</groupId>
3   <artifactId>pdfbox</artifactId>
4   <version>2.0.7</version>
5 </dependency>

 1 package cn.apache.poi.pdf;
 2 
 3 import org.apache.pdfbox.io.RandomAccessBuffer;
 4 import org.apache.pdfbox.pdfparser.PDFParser;
 5 import org.apache.pdfbox.pdmodel.PDDocument;
 6 import org.apache.pdfbox.pdmodel.PDPage;
 7 import org.apache.pdfbox.rendering.PDFRenderer;
 8 
 9 import javax.imageio.IIOImage;
10 import javax.imageio.ImageIO;
11 import javax.imageio.ImageWriter;
12 import javax.imageio.stream.ImageOutputStream;
13 import java.awt.image.BufferedImage;
14 import java.io.*;
15 import java.util.Iterator;
16 
17 /**
18  * Created by Jon_China on 2017/7/30.
19  */
20 public class Pdf2Image {
21     public final  static String  IMG_TYPE_JPG = "jpg";
22     public final  static String  IMG_TYPE_PNG = "png";
23     public static void main( String[] args ) throws IOException{
24         Pdf2Image pdf2Image = new Pdf2Image();
25         pdf2Image.pdf2img("E:\\java测试\\java测试\\程序1\\待转换文件\\待转换pdf.pdf", "D:",IMG_TYPE_PNG);
26     }
27 
28 
29     /**
30      * PDF转图片
31      * @param pdfPath pdf文件的路径
32      * @param savePath 图片保存的地址
33      * @param imgType 图片保存方式
34      */
35     public void pdf2img(String pdfPath,String savePath,String imgType){
36         String fileName = pdfPath.substring(pdfPath.lastIndexOf("\\")+1, pdfPath.length());
37         fileName = fileName.substring(0,fileName.lastIndexOf("."));
38         InputStream is = null;
39         PDDocument pdDocument = null;
40         try {
41             is = new BufferedInputStream(new FileInputStream(pdfPath));
42             //创建pdf文件解析器
43             PDFParser parser = new PDFParser(new RandomAccessBuffer(is));
44             parser.parse();
45             //获取解析后的pdf文档
46             pdDocument = parser.getPDDocument();
47             //获取pdf渲染器，主要用来后面获取BufferedImage
48             PDFRenderer renderer = new PDFRenderer(pdDocument);
49             //获取pdf文件总页数
50             int pageCount = pdDocument.getNumberOfPages();
51             for (int i = 0; i < pageCount; i++) {
52                 //构造保存文件名称格式
53                 String saveFileName = savePath+"\\"+fileName+"-"+i+"."+imgType;
54                 //获取当前页对象
55                 PDPage page =  pdDocument.getPage(i);
56                 //图片转换
57                 pdfPage2Img(page,saveFileName,imgType,renderer,i);
58             }
59         } catch (Exception e) {
60             e.printStackTrace();
61         }finally{
62             if(pdDocument != null){
63                 try {
64                     pdDocument.close();
65                 } catch (IOException e) {
66                     e.printStackTrace();
67                 }
68             }
69         }
70     }
71 
72     /**
73      * 将pdf单页转换为图片
74      * @param page 当页对象
75      * @param saveFileName 保存的图片名称
76      * @param imgType 保存的图片类型
77      * @param renderer 用于获取BufferedImage
78      * @param index 页索引
79      * @throws IOException
80      */
81     public void pdfPage2Img(PDPage page,String saveFileName,String imgType,PDFRenderer renderer,int index) throws IOException{
82         //构造图片
83         BufferedImage img_temp  = renderer.renderImage(index);
84         //设置图片格式
85         Iterator<ImageWriter> it = ImageIO.getImageWritersBySuffix(imgType);
86         //将文件写出
87         ImageWriter writer = (ImageWriter) it.next();
88         ImageOutputStream imageout = ImageIO.createImageOutputStream(new FileOutputStream(saveFileName));
89         writer.setOutput(imageout);
90         writer.write(new IIOImage(img_temp, null, null));
91     }
92 }