关于_pdf转图片的问题

 

 

 1 package com.duan;
 2 
 3 import java.awt.Image;
 4 import java.awt.Rectangle;
 5 import java.awt.image.BufferedImage;
 6 import java.io.*;
 7 import java.nio.ByteBuffer;
 8 import java.nio.channels.FileChannel;
 9 
10 import javax.swing.SwingUtilities;
11 
12 import com.sun.image.codec.jpeg.JPEGCodec;
13 import com.sun.image.codec.jpeg.JPEGImageEncoder;
14 import com.sun.pdfview.PDFFile;
15 import com.sun.pdfview.PDFPage;
16 
17 public class PdfToJpgTest {      
18     public static void setup() throws IOException {   
19         // load a pdf from a byte buffer  
20         File file = new File("F:test.pdf");  
21         RandomAccessFile raf = new RandomAccessFile(file, "r");  
22         FileChannel channel = raf.getChannel();  
23         ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel  
24                 .size());  
25         PDFFile pdffile = new PDFFile(buf);  
26  
27         System.out.println("页数： " + pdffile.getNumPages());  
28  
29         String getPdfFilePath = "F:";
30        
31         System.out.println("getPdfFilePath is  :"+getPdfFilePath);
32        
33         for (int i = 1; i <= pdffile.getNumPages(); i++) {  
34             // draw the first page to an image  
35             PDFPage page = pdffile.getPage(i);  
36  
37             // get the width and height for the doc at the default zoom  
38             Rectangle rect = new Rectangle(0, 0, (int) page.getBBox()  
39                     .getWidth(), (int) page.getBBox().getHeight());  
40  
41             // generate the image  
42             Image img = page.getImage(rect.width, rect.height, // width &  
43                                                                 // height  
44                     rect, // clip rect  
45                     null, // null for the ImageObserver  
46                     true, // fill background with white  
47                     true // block until drawing is done  
48                     );  
49  
50             BufferedImage tag = new BufferedImage(rect.width, rect.height,  
51                     BufferedImage.TYPE_INT_RGB);  
52             tag.getGraphics().drawImage(img, 0, 0, rect.width, rect.height,  
53                     null); 
54            
55           
56            
57             FileOutputStream out = new FileOutputStream( getPdfFilePath+"\\" + i + ".jpg");  // 输出到文件流
58             System.out.println("成功保存图片到 ：  " +getPdfFilePath+"\\" + i + ".jpg");
59            
60             JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);  
61             encoder.encode(tag); // JPEG编码  
62  
63             out.close();  
64         }  
65  
66         // show the image in a frame  
67         // JFrame frame = new JFrame("PDF Test");  
68         // frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
69         // frame.add(new JLabel(new ImageIcon(img)));  
70         // frame.pack();  
71         // frame.setVisible(true);  
72     }  
73  
74     public static void main(final String[] args) {  
75         SwingUtilities.invokeLater(new Runnable() {  
76             public void run() {  
77                 try {  
78                     PdfToJpgTest.setup();  
79                 } catch (IOException ex) {  
80                     ex.printStackTrace();  
81                 }  
82             }  
83         });  
84     }  
85  
86 }

需要额外引入

 

 

参考网址 http://blog.sina.com.cn/s/blog_4ed66efa0100g06d.html

posted on 2017-12-21 15:06  请喊飞哥哥  阅读(190)  评论(0)    收藏  举报

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