How to convert .pdf to .png

Using ImageMagick I can convert any pdf document into images by using command "convert":

convert abc.pdf abc.png

This will convert all pdf pages to png images.

How can I implement this using PHP or Java so th开发者_StackOverflow中文版at I can provide this functionality on my website to enable users to read books online as Google Books does.

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There is a Java API for ImageMagick called JMagick.

Here is a list of available ImageMagick APIs for various languages.

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You could use Java and the pdf-renderer library. Look at this post.

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In Java you can call Ghostscript from the command line. Ghostscript is freely available.

ProcessBuilder processBuilder = new ProcessBuilder("C:\\Programme\\gs\\gs9.00\\bin\\gswin32c.exe", "-dSAFER", "-dBATCH", "-dNOPAUSE", "-sDEVICE=pngalpha", "-r300", "-sOutputFile=C:\\TemplateEditor\\AdGenXTest\\Testdaten\\ActualPNGs\\" + fileName + ".png", "C:\\TemplateEditor\\AdGenXTest\\Testdaten\\ActualPDFs\\" + fileName + ".pdf");

processBuilder.start();

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There is a very good ImageMagick module for PHP. Read all about it at http://php.net/manual/en/book.imagick.php

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Maybe JPedal Java PDF library can help you?

On they site you can find some demo about converting PDF to image: PDF to text and PDF to Image Conversion