Date and Number Formatting

Java programs use the DateFormat.getDateInstance(int, locale) to parse and format dates in a locale-sensitive manner. Java programs use the NumberFormat.getXXXInstance(locale) method, where XXX can be Currency, Number, or Percent, to parse and format numerical values in a locale-sensitive manner. The servlet version of Duke's Bookstore uses the currency version of this method to format book prices.

JSTL applications use the fmt:formatDate and fmt:parseDate tags to handle localized dates and use the fmt:formatNumber and fmt:parseNumber tags to handle localized numbers, including currency values. For information on the JSTL formatting tags, see Formatting Tags (page 194). The JSTL version of Duke's bookstore uses the fmt:formatNumber tag to format book prices and the fmt:formatDate tag to format the ship date for an order:

   <fmt:formatDate value="${shipDate}" type="date"      dateStyle="full"/>.

The JavaServer Faces version of Duke's Bookstore uses date/time and number converters to format dates and numbers in a locale-sensitive manner. For example, the same shipping date is converted in the JavaServer Faces version as follows:

   <h:outputText value="#{cashier.shipDate}">      <f:convertDateTime dateStyle="full"/>    </h:outputText>

For information on JavaServer Faces converters, see Using the Standard Converters (page 359).

The JavaT EE 5 Tutorial
The JavaT EE 5 Tutorial
Year: 2004
Pages: 309 © 2008-2017.
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