图片转换成PDF

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/viktoria/article/details/72764038

/*
 * 图片转换成pdf
 * 注意：这里需要导入 com.lowagie.text-2.1.7jar包
 * imgPath：图片路径，如   E:\\victoria\\001.jpg"
 * pdfPath：转换之后的pdf路径，如  E:\\victoria\\001.pdf
 */
public boolean jpgToPdf(String imgPath,String pdfPath) throws IOException {
//判断文件是否存在
if (new File(imgPath).exists()) {
     Document doc = new Document(PageSize.A4);
try {
   //生成pdf
    PdfWriter.getInstance(doc, new FileOutputStream(pdfPath));
   doc.open();
   float newHeight = 0;
   //判断文件的宽度
   float pageWidth = doc.getPageSize().getWidth();
   float pageHeight = doc.getPageSize().getHeight();
   //获取图片的大小
   Image image = Image.getInstance(imgPath);
   float imageWidth = image.getPlainHeight();
         float imageHeight = image.getPlainWidth();

      //使图片自动适应大小
if(imageWidth > pageWidth - 72) {
     image.scaleAbsoluteWidth(pageWidth-72);
     newHeight += imageHeight*(pageWidth - 72)/imageWidth +36;
     image.scaleAbsoluteHeight(imageHeight*(pageWidth -72)/imageWidth);
}else{
     newHeight += imageHeight + 36;
}
//判断是否需要分页
if (pageHeight < newHeight) {
     doc.newPage();
newHeight = imageHeight*(pageWidth -72)/imageWidth +36;
}
image.setAbsolutePosition(36, pageHeight - newHeight);
doc.add(image);
} catch (FileNotFoundException e) {
     e.printStackTrace();
     return false;
} catch (DocumentException e) {
     e.printStackTrace();
     return false;
} finally {
     doc.close();
File file = new File(imgPath);
    if (new File(imgPath).exists()) {
    file.delete();
    }
}
}else{
   return false;
}
   return true;
}