How to config intellij-idea not format some part of the code?

In my version EAP 13.1, you must enable the following option in settings,

Preferences -> Code Style -> General -> Formatter Control -> Enable formatter markers in comments

before you can use these comments,

// @formatter:off

// @formatter:on 

or these (depending on language):

<!--@formatter:off-->

<!--@formatter:on-->

Screenshot:

It's worth noting that the formatter control does not appear to work in javadoc comments. It needs to be either in a regular C or C++-style comment. So // @formatter:off works /* @formatter:off */ also works, but /** @formatter:off */ does not.

This feature has been implemented and you can now disable formatting for the regions of code using the special comments.

After enabling this feature in the settings, add //@formatter:off at the start of your region, and //@formatter:on at the end of it.

These are the default markers, and they are configurable.

You can find more details and examples in the documentation:

• Skipping a region when reformatting source code
• Example of using formatting markers

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Original answer from 2012:

It's not possible yet, please vote for this feature request:

• IDEA-56995 Disable code formatting per region using comments

Since EAP 13 you can trigger the formatter with the following comments:

// @formatter:off
...
// @formatter:on 

To enable it in "surround with", you can define a Live Template in the section "surround" with:

// @formatter:off
$SELECTION$
// @formatter:off

You can find these settings in Settings -> Code Style -> General and set your own trigger words.