f:validateLongRange |
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The ValidateLongRange tag registers a LongRangeValidator instance on the
component associated with the enclosing tag. This tag can be used to validate
user input when the expected value is a long integer that is greater than or
less than another value or is between two values of the same data type.
JSF Example
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html">
<h:head />
<body>
<h:form>
<h:outputLabel value="Enter an amount to withdraw: " for="withdraw" />
<h:inputText label="Amount" id="withdraw"
value="#{accountBean.withdrawAmount}">
<f:validateLongRange minimum="20" maximum="1000" />
</h:inputText>
<h:commandButton value="Withdraw" actionListener="#{accountBean.withdraw}" />
<h:message for="withdraw" errorStyle="color:red; display:block" />
</h:form>
</body>
</html>
This example was formatted by JSFToolbox for Dreamweaver.
Rendered Output
When the form is submitted with the value 5 in the input field, the JSF framework will convert and validate the user input to determine if the value is between the minimum and maximum values defined by the validateLongRange tag. Since the input is not valid, the JSF framework creates a validation message that can be displayed using the h:message or h:messages tags.
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