JSF 2 Converter
In JSF we can create custom converter class which can give our own definition for data conversion.
Following steps required to create Converters
- Create a Java Converter class which implements javax.faces.convert.FacesConverter interface
- Override converter methods
- Apply converter annotations to Converter class
- Add converter tag for JSF input component
Create a converter class
package com.vinod.jsf;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.FacesConverter;
@FacesConverter("com.vinod.InputConverter")
public class InputConverter implements Converter{
@Override
public Object getAsObject(FacesContext context, UIComponent component, String value) {
System.out.println(" object value " + value);
return value;
}
@Override
public String getAsString(FacesContext context, UIComponent component, Object value) {
System.out.println(" string value " + value);
return "Mr." + value.toString();
}
}
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.FacesConverter;
@FacesConverter("com.vinod.InputConverter")
public class InputConverter implements Converter{
@Override
public Object getAsObject(FacesContext context, UIComponent component, String value) {
System.out.println(" object value " + value);
return value;
}
@Override
public String getAsString(FacesContext context, UIComponent component, Object value) {
System.out.println(" string value " + value);
return "Mr." + value.toString();
}
}
Create a Managed bean
package com.vinod.jsf;
import javax.faces.bean.ManagedBean;
@ManagedBean
public class ConverterBean {
public ConverterBean() {
}
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String submit() {
System.out.println("submit clicked");
return "ConverterExample.xhtml";
}
}
import javax.faces.bean.ManagedBean;
@ManagedBean
public class ConverterBean {
public ConverterBean() {
}
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String submit() {
System.out.println("submit clicked");
return "ConverterExample.xhtml";
}
}
Create a JSF xhtml page
<?xml version="1.0" encoding="UTF-8"?>
<!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:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core">
<head>
<title>My JSF Examples</title>
</head>
<h:body>
<h:form id="vinod">
<h:outputText value="Converter Example"/>
<h:inputText id="nametext" value="#{converterBean.name}">
<f:converter converterId="com.vinod.InputConverter" />
</h:inputText>
<h:commandButton value="Click" id="cmd" action="#{converterBean.submit}" >
</h:commandButton>
</h:form>
</h:body>
</html>
<!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:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core">
<head>
<title>My JSF Examples</title>
</head>
<h:body>
<h:form id="vinod">
<h:outputText value="Converter Example"/>
<h:inputText id="nametext" value="#{converterBean.name}">
<f:converter converterId="com.vinod.InputConverter" />
</h:inputText>
<h:commandButton value="Click" id="cmd" action="#{converterBean.submit}" >
</h:commandButton>
</h:form>
</h:body>
</html>
Run it..
https://github.com/kkvinodkumaran/myrepository
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