Regex to fetch xml node string value - regex

Question

I have an output, where i'd like to fetch the value of CMEngine node i.e., everything inside CMEngine node. Please help me with a regex, I already have a java code in place which uses the regex, so I just need the regex. Thanks
My XML
<General>
<LanguageID>en_US</LanguageID>
<CMEngine>
<CMServer/> <!-- starting here -->
<DaysToKeepHistory>4</DaysToKeepHistory>
<PreprocessorMaxBuf>5000000</PreprocessorMaxBuf>
<ServiceRefreshInterval>30</ServiceRefreshInterval>
<ReuseMemoryBetweenRequests>true</ReuseMemoryBetweenRequests>
<Trace Enabled="false">
<ActiveCategories>
<Category>ENVIRONMENT</Category>
<Category>EXEC</Category>
<Category>EXTERNALS</Category>
<Category>FILESYSTEM</Category>
<Category>INPUT_DOC</Category>
<Category>INTERFACES</Category>
<Category>NETWORKING</Category>
<Category>OUTPUT_DOC</Category>
<Category>PREPROCESSOR_INPUT</Category>
<Category>REQUEST</Category>
<Category>SYSTEMRESOURCES</Category>
<Category>VIEWIO</Category>
</ActiveCategories>
<SeverityLevel>ERROR</SeverityLevel>
<MessageInfo>
<ProcessAndThreadIds>true</ProcessAndThreadIds>
<TimeStamp>true</TimeStamp>
</MessageInfo>
<TraceFile>
<FileName>CMEngine_log.txt</FileName>
<MaxFileSize>1000000</MaxFileSize>
<RecyclingMethod>Restart</RecyclingMethod>
</TraceFile>
</Trace>
<JVMLocation>C:\Informatica\9.1.0\java\jre\bin\server</JVMLocation>
<JVMInitParamList/> <!-- Ending here -->
</CMEngine>
</General>

Answer 1

If it has to be a regex, and if there is only one CMEngine tag per string:
Pattern regex = Pattern.compile("(?<=<CMEngine>)(?:(?!</CMEngine>).)*", Pattern.DOTALL);
Matcher regexMatcher = regex.matcher(subjectString);
if (regexMatcher.find()) {
ResultString = regexMatcher.group();
}
Since that output appears to be machine-generated and is unlikely to contain comments or other stuff that might confuse the regex, this should work quite reliably.
It starts at a position right after a <CMEngine> tag: (?<=<CMEngine>)and matches all characters until the next </CMEngine> tag: (?:(?!</CMEngine>).)*.