JSF Under the Hood—Part 2 - JSF and HTML5 - page 67

<h:outputText value="Second number:"/>
<h:inputText id="sNumber"
value="#{calculator.secondNumber}"
required="true">
</h:inputText>
</h:panelGrid>
<h:commandButton action="#{calculator.calculateSum}" value="Sum"/><br/>
<h:outputText value="Result: #{calculator.result}"/>
</h:form>
</h:body>
</html>

Both the #{calculator.firstNumber} and #{calculator.secondNumber} expressions are binded automatically
with the firstNumber and the secondNumber attributes of the Calculator managed bean after being converted to
Double using the implicit javax.faces.Double converter. Like the Double type, implicit converters are applied also on
the Boolean , Byte , Character , Short , Integer , Long , Float , BigDecimal , and BigInteger Java types.
Explicit converters have to be attached to the components explicitly. Currently, the JSF core tag library provides
the following tags that represent JSF explicit converters:
•

<f:convertDateTime>

•

<f:convertNumber>

<f:converter>
<f:convertDateTime> converter converts the input String to java.util.Date object with any specified format.
Listing 3-5 shows a sample managed bean that includes a java.util.Date attribute.

•

Listing 3-5. Sample Managed Bean that Includes Date Attribute

import java.io.Serializable;
import java.util.Date;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;

@ManagedBean
@RequestScoped
public class TestBean implements Serializable {
// ...
private Date birthDate;

public Date getBirthDate() {
return birthDate;
}

public void setBirthDate(Date birthDate) {
this.birthDate = birthDate;
}
// ...
}