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Instead, the recommended approach is to use Java's built-in date formatting features via use of the webworks:text tag.

The sThe webwork:text tag should be used for all i18n values. It will look up the properties file for your action, and from that select the value for the key that you specify. This is best illustrated in an example:

<!-- display the number of items in a cart -->
<webwork<s:text name="'cart.items'" value0="cartItems" />

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Needless to say, this can get a lot more elaborate, with the ability to specify both date and number formatting. Let us consider another example. The goal here is to display a greeting to the user, as well as the date of their last visit.

<webwork<s:text name="'last.visit'" value0="userName" value1="lastVisit(userName)" />

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As you can see, this is a very powerful mechanism and allows you to easily display numbers and dates using any formatting rules that Java allows.

<s:text name="'text.message'" value0="userName"/>

<s:text name="'text.message'"> 
    <s:param value="'userName'"/>
</s:text>

format.date = {0,date,MM/dd/yy}
format.time = {0,date,MM/dd/yy ha}
format.percent = {0,number,##0.00'%'}
format.money = {0,number,$##0.00}