使用itext庫將圖像轉換爲pdf文件

Question

Im能夠使用itext庫成功將圖像轉換爲pdf，但問題出在轉換時，它沒有正確轉換（即，）精確圖像的位置像這樣向下拖動。

這是PDF圖像....

和轉換我的形象回到PDF後，這是我得到

這是使用

代碼IM從pdf轉換爲圖像

File sourceFile = new File(sourceDir); 
File destinationFile = new File(destinationDir); 
String fileName = sourceFile.getName().replace(".pdf", ""); 
if (sourceFile.exists()) { 
    if (!destinationFile.exists()) { 
     destinationFile.mkdir(); 
     System.out.println("Folder created in: "+ destinationFile.getCanonicalPath()); 
    } 

    RandomAccessFile raf = new RandomAccessFile(sourceFile, "r"); 
    FileChannel channel = raf.getChannel(); 
    ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size()); 
    PDFFile pdf = new PDFFile(buf); 
    System.out.println("Total Pages: "+ pdf.getNumPages()); 
    int pageNumber = 1; 
    for (int i = 0; i < pdf.getNumPages(); i++) { 
     PDFPage page = pdf.getPage(i+1); 
     // image dimensions 
     int width = 1200; 
     int height = 1400; 
     // create the image 
     Rectangle rect = new Rectangle(0, 0, (int) page.getBBox().getWidth(), (int) page.getBBox().getHeight()); 
     BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); 

     // width & height, // clip rect, // null for the ImageObserver, // fill background with white, // block until drawing is done 
     Image image = page.getImage(width, height, rect, null, true, true); 
     Graphics2D bufImageGraphics = bufferedImage.createGraphics(); 
     bufImageGraphics.drawImage(image, 0, 0, null); 

     File imageFile = new File(destinationDir + "pdfImg" + i +".png");// change file format here. Ex: .png, .jpg, .jpeg, .gif, .bmp 

     ImageIO.write(bufferedImage, "png", imageFile); 
     pageNumber++;     
    } 
} 

這是用將其轉換回PDF再次

Rectangle pageSize = new Rectangle(2780, 2525); 
Document pdfDocument = new Document(PageSize.A4); 
String pdfFilePath = outputFile; 
try 
{ 
    FileOutputStream fileOutputStream = new FileOutputStream(pdfFilePath); 
    PdfWriter writer = null; 
    writer = PdfWriter.getInstance(pdfDocument, fileOutputStream); 
    writer.open(); 
    pdfDocument.open(); 
    /** 
    * Proceed if the file given is a picture file 
    */ 
    if (isPictureFile) 
    { 
     pdfDocument.add(com.itextpdf.text.Image.getInstance(inputFile)); 
    } 
    /** 
    * Proceed if the file given is (.txt,.html,.doc etc) 
    */ 
    else 
    { 
    File file = new File(inputFile); 
    //pdfDocument.add(new Paragraph(org.apache.commons.io.FileUtils.readFileToString(file))); 
    } 

    pdfDocument.close(); 
    writer.close(); 
} 
catch (Exception exception) 
{ 
    System.out.println("Document Exception!" + exception); 
} 

Answer 1

改變圖像大小這裏的代碼IM：

// image dimensions 
      int width = 700; // here 
      int height = 600;//here 

你的形象是出PDF屏幕尺寸的...它減少因爲它會接受在pdf ..