(Implemented in Java) solutions for converting HTML to JPG, Tiff, and other image formats and combining tiff images.

In the previous article, we talked about the implementation of HTML-to-PDF conversion. In another aspect of that requirement, the project requires page-to-image conversion, mainly JPG, Tiff, PNG format. I was a little confused, but it was never done last time. No suitable tool was found for conversion.

A short time ago, we found that an open-source Apache tool could convert PDF files into images. Without a jar package that directly transforms HTML into images, we could only save the country by curve.

I forgot to introduce it. The package for converting PDF files to images is called Apache product_box. The right side is the official website of product_box.

The following code is directly pasted:

public void convertToTiff(String pdfFilePath, String tiffFileName)throws Exception { PDDocument doc = PDDocument.load(pdfFilePath);        int pageCount = doc.getPageCount();         List pages = doc.getDocumentCatalog().getAllPages();         List<File> files = new ArrayList<File>();        List<File> deleteFiles = new ArrayList<File>();                        for(int i=0;i<pages.size();i++){            PDPage page = (PDPage)pages.get(i);             BufferedImage image = page.convertToImage(BufferedImage.TYPE_BYTE_BINARY, 300);                                     Iterator iter = ImageIO.getImageWritersBySuffix("jpg");             ImageWriter writer = (ImageWriter)iter.next();             File outFile = new File("C:/1"+i+".jpg");             FileOutputStream out = new FileOutputStream(outFile);                         ImageOutputStream outImage = ImageIO.createImageOutputStream(out);             writer.setOutput(outImage);             writer.write(new IIOImage(image,null,null));                                     this.jpg2tif("C:/1"+i+".jpg", "C:/1"+i+".tif");            files.add(new File("C:/1"+i+".tif"));             deleteFiles.add(outFile);            deleteFiles.add(new File("C:/1"+i+".tif"));                                    outImage.close();            out.close();            writer.dispose();}        if(files != null){        this.tif2Marge(files, "C:/1.tif");        }}

/*** Convert JPG format to Tif format. * @ Param srcfile the source file to be replaced * @ Param descfile the transfer file after the change * @ throws exception */Public void jpg2tif (string srcfile, string descfile) throws exception {renderedop src = Jai. create ("fileload", srcfile); outputstream OS = new fileoutputstream (descfile); incluencodeparam Param = new incluencodeparam (); Param. setcompression (incluencodeparam. compression_pai_ttn2); imageencoder encoder = imagecodec. createimageenco Der ("tiff", OS, Param); encoder. encode (SRC); OS. close ();} /*** contract several TIF files into one tif file * @ Param srcfile * @ Param descfile * @ throws exception */Public void tif2marge (list <File> srcfile, string descfile) throws exception {list pages = new arraylist (srcfile. size ()-1); For (INT I = 0; I <srcfile. size (); I ++) {renderedop firstpage = Jai. create ("fileload", srcfile. get (0 ). getCanonicalPath (); if (I! = 0) {renderedop page = Jai. create ("fileload", srcfile. get (I ). getCanonicalPath (); pages. add (PAGE) ;}outputstream OS = new fileoutputstream (descfile); incluencodeparam Param = new incluencodeparam (); Param. setcompression (incluencodeparam. compression_assist_ttn2); Param. setextraimages (pages. iterator (); imageencoder encoder = imagecodec. createimageencoder ("tiff", OS, Param); encoder. encode (firstpage); firstpage. dispose (); For (Int J = 1; j <pages. size (); j ++) {(renderedop) pages. get (j )). dispose ();} OS. close (); pages. clear ();}}