JAVASERVER FACES - Introduction to Java Programming: Comprehensive Version - page 1238

41 <h:inputText id="heightInputText" required="true"
42 requiredMessage="Height is required"
43 validatorMessage="Height must be between 3.5 and 9.5"
44 value="#{validateForm.heightString}">
45 <f:validateDoubleRange minimum="3.5" maximum="9.5"/>
46 </h:inputText>
47 <h:message for="heightInputText" style="color:red"/>
48 </h:panelGrid>
49
50 <h:commandButton value="Submit" />
51
52 <h:outputText style="color:red"
53 value="#{validateForm.response}" />
54 </h:form>
55 </h:body>
56 </html>

validate double range

For each input text field, set its required attribute true (lines 14, 23, 32, 41) to indi-
cate that an input value is required for the field. When a required input field is empty, the
requiredMessage is displayed (lines 15, 24, 33, 42).
The validatorMessage attribute specifies a message to be displayed if the input field is
invalid (line 16). The f:validateLength tag specifies the minimum or maximum length of
the input (line 18). JSF will determine whether the input length is valid.
The h:message element displays the validatorMessage if the input is invalid. The ele-
ment's for attribute specifies the id of the element for which the message will be displayed
(line 20).
The f:validateRegex tag specifies a regular expression for validating the input (line 27).
For information on regular expression, see Appendix H.
The f:validateLongRange tag specifies a range for an integer input using the minimum
and maximum attribute (line 36). In this project, a valid age value is between 16 and 120 .
The f:validateDoubleRange tag specifies a range for a double input using the minimum
and maximum attribute (line 45). In this project, a valid height value is between 3.5 and 9.5 .

required attribute
requiredMessage

validatorMessage
f:validateLength

h:message

f:validateRegex

f:validateLongRange

f:validateDoubleRange

L ISTING 33.12

ValidateFormJSFBean.java
1 package jsf2demo;
2
3 import javax.enterprise.context.RequestScoped;
4 import javax.inject.Named;
5
6 @Named(value = "validateForm" )
7 @RequestScoped
8 public class ValidateFormJSFBean {
9

private String name;

10 private String ssn;

11 private String ageString;

12 private String heightString;

13
14 public String getName() {

15 return name;

16 }
17
18 public void setName(String name) {

19 this .name = name;

20 }
21
22 public String getSsn() {

23 return ssn;