How to resolve conflicts between jquery and NVelocity _ jquery

Sometimes jquery conflicts with NVelocity. The following is a specific solution. For more information, see. When the $ of NVelocity conflicts with the $ of Jquery, the following solutions are provided:
1,
Use jQuery. noConflict. For example, var j = jQuery. noConflict (); j. ajax ();
Disadvantage: When jQuery plug-ins are used, the plug-ins will become invalid!
2,
Use jQuery instead of $. For example: jQuery. ajax ();
Disadvantage: it is not suitable for expansion. If it is replaced with a third-party library, it will be difficult.
3,
The conflict method in wrap jQuery.
For example, if $. ajax () Conflicts in Velocity, the definition is as follows:
Function dw (){}
Dw. ajax = function (s) {jQuery. ajax (s) ;}dw. ajax ();
4,
Define a $ JQ as $. You can use $ {JQ} AJAX in js later.
Write (defined) in the foreground as follows: # set ($ JQ = "$ .")
I recommend 4th methods.