CODEWITHSUNDEEP
javahtmlstringtransform
Vitaly Olegovitch
Vitaly Olegovitch

Reputation: 3547

Transforming nested Markdown into HTML using Java

I need to transform strings one into another. An example is:

#Fashion #Helmet #Woman #Scifi [ ![t](http://24.media.tumblr.com/tumblr_mbv08xkdzy1qfzis2o1_1280.gif) ](http://bit.ly/P1omax) Rob Goodwin

That has to be transformed into the HTML code:

#Fashion #Helmet #Woman #Scifi<a href="http://bit.ly/P1omax"><img src="http://24.media.tumblr.com/tumblr_mbv08xkdzy1qfzis2o1_1280.gif" /></a>

Is there a Java library that does that?

UPDATE

It looks very similar to Markdown. But processing it with markdownj produces a messy HTML:

<h1>Fashion #Helmet #Woman #Scifi</h1>

<p><a href="a href="http://24.media.tumblr.com/tumblr_mbv08xkdzy1qfzis2o1_1280.gif">http://24.media.tumblr.com/tumblr_mbv08xkdzy1qfzis2o1_1280.gif</a"> <img src="<a href="http://bit.ly/P1omax">http://bit.ly/P1omax</a>" alt="t</a> " />
Rob Goodwin</p>

UPDATE 2

All three Java libraries that allow to transform Markdown into HTML have problems recognising images inside links.

The approach that I decided to use is a two-step approach:

It is not an ideal solution, but it works.

Upvotes: 0

Views: 1280

Answers (3)

Will Sewell
Will Sewell

Reputation: 2643

You could use regular expressions to extract the URLs from the text, and then concatenate into a template output string.

There are many examples of the regex needed to extract URLS, this for example.

Using the above method, you could write something like:

String[] split = yourInput.split("[ ![t](");
String[] urls = pullLinks(yourInput)
String output = split[0] + "<a href=\"" + urls[1] + "\"><img src=\"" + urls[0] + "\" /></a>";

Upvotes: 1

Rudolf M&#252;hlbauer
Rudolf M&#252;hlbauer

Reputation: 2531

Is the inputstring markdown? Yes it works in http://daringfireball.net/projects/markdown/dingus which generates

<h1>Fashion #Helmet #Woman #Scifi <a href="http://bit.ly/P1omax"> <img src="http://24.media.tumblr.com/tumblr_mbv08xkdzy1qfzis2o1_1280.gif" alt="t" title="" /> </a> Rob Goodwin</h1>

Therefore: http://code.google.com/p/markdownj/ Or: http://en.wikipedia.org/wiki/List_of_Markdown_implementations

https://github.com/sirthias/pegdown looks ok. they claim:

[pegdown] fully passes the original Markdown test suite

Upvotes: 2

Neil Weightman
Neil Weightman

Reputation: 431

Your best bet would be to look at using XSLT. Java includes XSLT as part of the JAXP library and this will allow you to define pattern matching and transformation rules, using XSL, and apply them to input text. Eclipse has an excellent tool to allow you to build and test XSL.

Upvotes: 0

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