How to set datepicker locale with Struts2 jQuery plugin

How can I se开发者_运维问答t a different locale to my <sj:datepicker>?

I use the Struts2 jQuery plugin bundled with MyEclipse 8.5, and I found some different locales, but I can't set it!

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you can set the jQuery locale in the Head Tag.

<sj:head locale="de" ... />