While using HTML Tidy I needed to remove the DOCTYPE prolog to prevent
‘org.xml.sax.SAXParseException: Already seen doctype.’ exception.
Regex is quite simple, only catch is that we need to make sure we include the \n\r in our selecton and make it not greedy.
convertedData = convertedData.replaceAll("", "");
This will consume multiline as well as single declarations
/*
*/
Here is some regex to trim leading/trailing newlines carriage and spaces returns from some text.
Without replacing 'spaces' just new lines/carriage returns.
^(\n|\r)+|(\n|\r)+\Z
This will trim also spaces
^(\n|\r|\s)+|(\n|\r|\s)+\Z
Quick explanation might be in order. This regex consists of two parts, first one start at the beginning of the the line and follows consuming ‘\n’ or ‘\r’ one ore more times. Second part consumes ‘\n’ or ‘\r’ one or more times followed by end of input string or new line.
Some text bla
More text after some breaks in between.
Some text bla More text after some breaks in between.