1. 程式人生 > >java實現PDF轉圖片(每頁轉換成一張圖片,可單頁轉換或指定頁數)

java實現PDF轉圖片(每頁轉換成一張圖片,可單頁轉換或指定頁數)

話不多說,直接上程式碼

public class PDF2IMAGE {
	public static void main(String[] args) { 
    	if(args!=null && args.length>=4) {
    		String pdfPath = args[0];
    		String imgPath = args[1];
    		int dpi = Integer.parseInt(args[2]);
    		int flag = Integer.parseInt(args[3]);
    		File file = new File(pdfPath);
    		if(file.isFile()&&file.exists()) { 
    			pdf2Image(pdfPath, imgPath, dpi,flag);
    		}
        
    	}
    	//pdf2Image("D:/hvdGBFLoo.pdf", "D:/pdf", 300,2); 
    }  
  
    /*** 
     * PDF檔案轉PNG圖片 
     * @param PdfFilePath pdf完整路徑 
     * @param imgFilePath 圖片存放的資料夾 
     * @param dpi dpi越大轉換後越清晰,相對轉換速度越慢 
     * @param flag 頁數 為0則轉換全部頁數
     * @return 
     */  
    public static void pdf2Image(String PdfFilePath, String dstImgFolder, int dpi,int flag) {  
        File file = new File(PdfFilePath);   
        PDDocument pdDocument;   
        try {  
            String imgPDFPath = file.getParent();  
            int dot = file.getName().lastIndexOf('.');  
            String imagePDFName = file.getName().substring(0, dot); 
            String imgFolderPath = null;  
            if (dstImgFolder.equals("")) {  
                imgFolderPath = imgPDFPath ;
            } else {  
                imgFolderPath = dstImgFolder;  
            }  
  
            if (createDirectory(imgFolderPath)) {  
                pdDocument = PDDocument.load(file);
				
                PDFRenderer renderer = new PDFRenderer(pdDocument); 
                int pages = pdDocument.getNumberOfPages();
                if(flag > 0) {//大於0則列印具體頁數
                    if(flag<pages) {
                    	pages = flag;
                    }
                }
               
                StringBuffer imgFilePath = null;  
                for (int i = 0; i < pages; i++) {  
                    String imgFilePathPrefix = imgFolderPath+File.separator + imagePDFName;  
                    imgFilePath = new StringBuffer();  
                    imgFilePath.append(imgFilePathPrefix);  
                    imgFilePath.append("-");  
                    imgFilePath.append(String.valueOf(i + 1));  
                    imgFilePath.append(".png");  
                    File dstFile = new File(imgFilePath.toString());  
                    BufferedImage image = renderer.renderImageWithDPI(i, dpi);  
                    ImageIO.write(image, "png", dstFile);  
                }
                System.out.println("success");  
            } else {  
                System.out.println("error:" + "creat" + imgFolderPath + "wrong");  
            }  
  
        } catch (Exception e) { 
	    System.out.println("Exception");		
            e.printStackTrace();  
        }  
    }  
  
    private static boolean createDirectory(String folder) {  
        File dir = new File(folder);  
        if (dir.exists()) {  
            return true;  
        } else {  
            return dir.mkdirs();  
        }  
    } 
  
}
本方案使用的是PDFbox jar包,使用的是JDK1.8。