java PDF转JPG

短命女 2022-12-25 13:54 121阅读 0赞

**第一步：  
引入jar:**

<dependency>
         <groupId>org.apache.pdfbox</groupId>
         <artifactId>fontbox</artifactId>
         <version>2.0.1</version>
     </dependency>
     <dependency>
         <groupId>org.apache.pdfbox</groupId>
         <artifactId>pdfbox</artifactId>
         <version>2.0.1</version>
     </dependency>

**第二步：  
java代码：**

package cn.com.XX.utils;
    import org.apache.pdfbox.pdmodel.PDDocument;
    import org.apache.pdfbox.pdmodel.PDPageTree;
    import org.apache.pdfbox.rendering.PDFRenderer;
     
    import javax.imageio.ImageIO;
    import java.awt.image.BufferedImage;
    import java.io.*;
     
    /** * * @author zj * */
    public class Pdf2jpgUtils { 
     
        public static void main(String args[]){ 
            pdfbox();
        }
     
     
        static void pdfbox()  { 
            PDDocument doc = null;
            ByteArrayOutputStream os = null;
            InputStream stream = null;
     
            OutputStream out = null;
     
            /*InputStream is = null; OutputStream responseOut = null;*/
            try{ 
                long start = System.currentTimeMillis();
                //pdf路径
                stream = new FileInputStream(new File("D:/pdf.pdf"));
                // 加载解析PDF文件
                doc = PDDocument.load(stream);
                PDFRenderer pdfRenderer = new PDFRenderer(doc);
                PDPageTree pages = doc.getPages();
                int pageCount = pages.getCount();
                for (int i = 0; i < pageCount; i++) { 
                    BufferedImage bim = pdfRenderer.renderImageWithDPI(i, 200);
                    os = new ByteArrayOutputStream();
                    ImageIO.write(bim, "jpg", os);
                    byte[] datas = os.toByteArray();
     
                    //jpg文件转出路径
                    out = new FileOutputStream("D:\\pdf\\abc" + i + ".jpg");
                    out.write(datas);
     
                    //通过response输出流
                   /* is = new ByteArrayInputStream(datas); byte[] buffer = new byte[1024]; int len = 0; while ((len = is.read(buffer)) > 0) { responseOut.write(buffer, 0, len); } responseOut.flush();*/
     
                }
                long end = System.currentTimeMillis();
                long time = (end - start);
                System.out.println("pdf转jpg耗时： " + time);
            }catch (Exception e){ 
                e.printStackTrace();
            }finally { 
                if (doc != null) { 
                    try { 
                        doc.close();
                    } catch (Exception e) { 
                        e.printStackTrace();
                    }
                }
                if (os != null) { 
                    try { 
                        os.close();
                    } catch (Exception e) { 
                        e.printStackTrace();
                    }
                }
                if (stream != null) { 
                    try { 
                        stream.close();
                    } catch (Exception e) { 
                        e.printStackTrace();
                    }
                }
                if (out != null) { 
                    try { 
                        out.close();
                    } catch (Exception e) { 
                        e.printStackTrace();
                    }
                }
                /*if (is != null) { try { is.close(); } catch (Exception e) { e.printStackTrace(); } } if (responseOut != null) { try { responseOut.close(); } catch (Exception e) { e.printStackTrace(); } }*/
            }
     
        }
    }