PDFBox - 从图像生成PDF的问题

Question

我想从JPEG，BMP类型的图像生成PDF，但我gettng图像的一部分总是被切断。我正在使用其中一个默认窗口图片Sunset.jpg。

下面是代码：

import java.awt.image.BufferedImage; 
    import java.io.File; 
    import java.io.IOException; 

    import javax.imageio.ImageIO; 
    import javax.imageio.stream.FileImageInputStream; 
    import org.apache.pdfbox.exceptions.COSVisitorException; 
    import org.apache.pdfbox.io.RandomAccessFile; 
    import org.apache.pdfbox.pdmodel.PDDocument; 
    import org.apache.pdfbox.pdmodel.PDPage; 
    import org.apache.pdfbox.pdmodel.edit.PDPageContentStream; 
    import org.apache.pdfbox.pdmodel.graphics.xobject.PDCcitt; 
    import org.apache.pdfbox.pdmodel.graphics.xobject.PDJpeg; 
    import org.apache.pdfbox.pdmodel.graphics.xobject.PDPixelMap; 
    import org.apache.pdfbox.pdmodel.graphics.xobject.PDXObjectImage; 

    public class ImageToPDF 
    { 
     public void createPDFFromImage(String file, String image) throws IOException, COSVisitorException 
     { 
      PDDocument doc = null; 
      try 
      { 
       doc = new PDDocument(); 
       PDPage page = new PDPage(); 
       doc.addPage(page); 
       PDXObjectImage ximage = null; 
       if(image.toLowerCase().endsWith(".jpg") || image.toLowerCase().endsWith(".jpeg")) 
       {   
        BufferedImage awtImage = ImageIO.read(new File(image));    
      ximage = new PDJpeg(doc, awtImage, 0); 
       } 
       else if (image.toLowerCase().endsWith(".tif") || image.toLowerCase().endsWith(".tiff")) 
       { 
        ximage = new PDCcitt(doc, new RandomAccessFile(new File(image),"r")); 
       } 
       else 
       { 
         BufferedImage awtImage = new BufferedImage(1000, 800, BufferedImage.TYPE_INT_RGB);    
        awtImage = ImageIO.read(new FileImageInputStream(new File(image)));        
        ximage = new PDPixelMap(doc, awtImage); 
       } 
       System.out.println(" Width of the image.... "+ximage.getWidth()); 
       PDPageContentStream contentStream = new PDPageContentStream(doc, page);    
       contentStream.drawImage(ximage, 20, 20); 
       contentStream.close(); 
       doc.save(file); 
      } 
      finally 
      { 
       if(doc != null) 
       { 
        doc.close(); 
       } 
      } 
     } 

     public static void main(String[] args) 
     { 
      ImageToPDF app = new ImageToPDF(); 
      try 
      { 
       app.createPDFFromImage("C:\\test1.pdf", "C:\\Sunset.jpg");       
      } 
      catch (Exception e) 
      { 
       e.printStackTrace(); 
      } 
     } 

}

请帮我纠正我在做什么错。

Answer 1

您是否考虑过裁剪图像以防止它被切断？

contentStream.drawImage(ximage, 20, 20, croppedWidth, croppedHeight); 

Answer 2

请尝试修改为如下的drawImage声明：

content.drawImage(ximage,0 /*or your preferred indent*/,(700-ximage.getHeight())); 

Answer 3

这些代码可能对您有所帮助，它的工作原理。

public void createPDFFromImage(String pdfFile, 
     List<String> imgList,int x, int y, float scale) throws IOException, COSVisitorException { 
    // the document 
    PDDocument doc = null; 
    try { 
     doc = new PDDocument(); 
     Iterator iter = imgList.iterator(); 
     int imgIndex=0; 
     while(iter.hasNext()) { 
      PDPage page = new PDPage(); 
      doc.addPage(page); 

      BufferedImage tmp_image = ImageIO.read(new File(iter.next().toString())); 
      BufferedImage image = new BufferedImage(tmp_image.getWidth(), tmp_image.getHeight(), BufferedImage.TYPE_4BYTE_ABGR);   
      image.createGraphics().drawRenderedImage(tmp_image, null); 

      PDXObjectImage ximage = new PDPixelMap(doc, image); 

      imgIndex++; 


      PDPageContentStream contentStream = new PDPageContentStream(
        doc, page,true,true); 

      contentStream.drawXObject(ximage, x, y, ximage.getWidth()*scale, ximage.getHeight()*scale); 

      contentStream.close(); 
     } 
     doc.save(pdfFile); 
    } finally { 
     if (doc != null) { 
      doc.close(); 
     } 
    } 
} 

Answer 4

请添加下面的代码片段，并尝试：需要

导入：

import org.apache.pdfbox.pdmodel.common.PDRectangle; 

代码追加：

PDXObjectImage image = new PDJpeg(pdfDoc, filePath)); 

float w = image.getWidth(); 
float h = image.getHeight(); 

PDPage page = new PDPage(new PDRectangle (w,h));