(using Annotation)
---------------------------
We have already seen echo example.
Almost the same code can be easily
used for a query example. The only
change will be which helper bean we
will be using. Instead of my name in
text1, I will send query string. The
result will be Vector which can be
suitably displayed in a dataTable(spcial
JSF control). Instead of echo bean,
I will use querybean. We can use either
hiberbean or ordianary JDBC bean. I am
using JDBC bean. I am giving the code now.
index.jsp
--------------
<%@ page language="java"%>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h"%>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
<html>
<body bgcolor='gold' text='blue'>
<center>
<f:view>
<h:form id="queryform">
<h:outputText value="query"/>
<h:inputText id="text1" value="#{backing.query}" /><br/>
<h:commandButton id="button1"
action="#{backing.showrecords}"
value="getrecords"/>
<h:dataTable value="#{backing.players}" var="ob">
<h:column>
<f:facet name="header">
<h:outputText value="ID"/>
</f:facet>
<h:outputText value="#{ob.id}"/>
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="NAME"/>
</f:facet>
<h:outputText value="#{ob.name}"/>
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="PLACE"/>
</f:facet>
<h:outputText value="#{ob.place}"/>
</h:column>
</h:dataTable>
</h:form>
</f:view>
</center>
</body>
</html>
==============================================
The corresponding backing bean is given below.
// backing.java
package mypack;
import java.io.Serializable;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import java.util.*;
import javax.faces.event.*;
@ManagedBean(name="backing")
@SessionScoped
public class backing
{
Vector players ;
String query;
public void setQuery(String a){query=a;}
public String getQuery(){return query;}
public void setPlayers(Vector v){players=v;}
public Vector getPlayers() { return players; }
//---------------------------------------
public String showrecords()
{
String a=getQuery();
querybean bean1= new querybean();
Vector v = bean1.getrecords(a);
setPlayers(v);
return "success";
}
}
---------------------------------------------------------------------------------------------------------------------------------------
Note the Annotation. And i did not change either web.xml or
faces-config.xml. Everything is taken care by annotation.
compiling and deployment procedure is as before.
In the next post I will give a demo for the usual CRUD operations.
