JSF newbie question - ServletException - Method not found
I just started learning JSF (and JSP) by following the tutorial:
JSF for nonbelievers: Clearing the FUD about JSF
http://www-128.ibm.com/developerworks/library/j-jsf1/
I'm getting a ServletException and I'm not sure why. Instead of starting the tutorial over, I'd like to learn what I'm doing wrong.
The exception is:
exception
javax.servlet.ServletException: Method not found: secondapp.controller.CalcBean@1ad81d2.add()
root cause
javax.el.MethodNotFoundException: Method not found: secondapp.controller.CalcBean@1ad81d2.add()
In the calculator.jsp page (a simple page with two form fields), I noticed that when I typeCalcBean., my IDE (NetBeans) only autocompletes the class variables and neither of the methods (add and multiply). I quickly searched and someone suggested restarting the server. This did not fix my problem. I must be doing something completely wrong or I missed something in the tutorial. If you don't mind, please read the simple files below and see if you can spot anything wrong. Please keep in mind this is my first time using JSF (and JSP for that matter). If you can suggest a better newbie tutorial, please do! Thanks
web.xml
-
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<context-param>
<param-name>com.sun.faces.verifyObjects</param-name>
<param-value>false</param-value>
</context-param>
<context-param>
<param-name>com.sun.faces.validateXml</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>client</param-value>
</context-param>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>/faces/*</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>
index.jsp
</welcome-file>
</welcome-file-list>
</web-app>
faces-config.xml
-
<?xml version="1.0" encoding="UTF-8"?>
<!-- =========== FULL CONFIGURATION FILE ================================== -->
<faces-config version="1.2" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_1_2.xsd">
<managed-bean>
<description>
The"backing file" bean that backs up the calculator webapp
</description>
<managed-bean-name>CalcBean</managed-bean-name>
<managed-bean-class>secondapp.controller.CalcBean</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
<navigation-rule>
<from-view-id>/calculator.jsp</from-view-id>
<navigation-case>
<from-outcome>success</from-outcome>
<to-view-id>/results.jsp</to-view-id>
</navigation-case>
</navigation-rule>
</faces-config>
secondapp.controller.CalcBean.java
-
package secondapp.controller;
import secondapp.model.Calculator;
/**
*
* @author Jonathan
*/
publicclass CalcBean{
privateint firstNumber;
privateint secondNumber;
privateint result;
private Calculator calculator;
/** Creates a new instance of CalcBean */
public CalcBean(){
setFirstNumber(0);
setSecondNumber(0);
result = 0;
setCalculator(new Calculator());
}
public String add(int a,int b){
result = calculator.add(a,b);
return"success";
}
public String multiply(int a,int b){
result = calculator.multiply(a,b);
return"success";
}
// <editor-fold desc=" Accessors/Mutators ">
publicint getFirstNumber(){
return firstNumber;
}
publicvoid setFirstNumber(int firstNumber){
this.firstNumber = firstNumber;
}
publicint getSecondNumber(){
return secondNumber;
}
publicvoid setSecondNumber(int secondNumber){
this.secondNumber = secondNumber;
}
publicint getResult(){
return result;
}
publicvoid setCalculator(Calculator calculator){
this.calculator = calculator;
}
// </editor-fold>
}
secondapp.model.Calculator
-
package secondapp.model;
/**
*
* @author Jonathan
*/
publicclass Calculator{
/** Creates a new instance of Calculator */
public Calculator(){
}
publicint add(int a,int b){
return a+b;
}
publicint multiply(int a,int b){
return a*b;
}
}
calculator.jsp
-
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<html>
<head><title>Calculator Test</title></head>
<body bgcolor="white">
<h2>My Calculator</h2>
<f:view>
<h:form id="calcForm">
<h:panelGrid columns="3">
<h:outputLabel value="First Number" for="firstNumber" />
<h:inputText id="firstNumber" value="#{CalcBean.firstNumber}" required="true" />
<h:message for="firstNumber" />
<h:outputLabel value="Second Number" for="secondNumber" />
<h:inputText id="secondNumber" value="#{CalcBean.secondNumber}" required="true" />
<h:message for="secondNumber" />
</h:panelGrid>
<h:panelGroup>
<h:commandButton id="submitAdd" action="#{CalcBean.add}" value="Add" />
<h:commandButton id="submitMultiply" action="#{CalcBean.multiply}" value="Multiply" />
</h:panelGroup>
</h:form>
</f:view>
</body>
</html>
