JSF 기초 1

<!-- Faces Servlet -->
<servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup> 1 </load-on-startup>
</servlet>

<!-- Faces Servlet Mapping -->
<servlet-mapping>
    <servlet-name>Faces Servlet</servlet-name>
    <url-pattern>/calc/*</url-pattern>
</servlet-mapping>

<faces-config>
    ...
  <managed-bean>
    <description>
      The "backing file" bean that backs up the calculator webapp
    </description>
    <managed-bean-name>CalcBean</managed-bean-name>
    <managed-bean-class>com.arcmind.jsfquickstart.controller.CalculatorController</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>

package com.arcmind.jsfquickstart.model;

/**
 * Calculator
 *
 * @author Rick Hightower
 * @version 0.1
 */
public class Calculator {
    //~ Methods ----------------------------------------------------------------

    /**
     * add numbers.
     *
     * @param a first number
     * @param b second number
     *
     * @return result
     */
    public int add(int a, int b) {
        return a + b;
    }

    /**
     * multiply numbers.
     *
     * @param a first number
     * @param b second number
     *
     * @return result
     */
    public int multiply(int a, int b) {
        return a * b;
    }
   
}

package com.arcmind.jsfquickstart.controller;

import com.arcmind.jsfquickstart.model.Calculator;

/**
 * Calculator Controller
 *
 * @author $author$
 * @version $Revision$
 */
public class CalculatorController {
    //~ Instance fields --------------------------------------------------------

    /**
     * Represent the model object.
     */
    private Calculator calculator = new Calculator();

    /** First number used in operation. */
    private int firstNumber = 0;

    /** Result of operation on first number and second number. */
    private int result = 0;

    /** Second number used in operation. */
    private int secondNumber = 0;

    //~ Constructors -----------------------------------------------------------

    /**
     * Creates a new CalculatorController object.
     */
    public CalculatorController() {
        super();
    }

    //~ Methods ----------------------------------------------------------------

    /**
     * Calculator, this class represent the model.
     *
     * @param aCalculator The calculator to set.
     */
    public void setCalculator(Calculator aCalculator) {
        this.calculator = aCalculator;
    }

    /**
     * First Number property
     *
     * @param aFirstNumber first number
     */
    public void setFirstNumber(int aFirstNumber) {
        this.firstNumber = aFirstNumber;
    }

    /**
     * First number property
     *
     * @return First number.
     */
    public int getFirstNumber() {
        return firstNumber;
    }

    /**
     * Result of the operation on the first two numbers.
     *
     * @return Second Number.
     */
    public int getResult() {
        return result;
    }

    /**
     * Second number property
     *
     * @param aSecondNumber Second number.
     */
    public void setSecondNumber(int aSecondNumber) {
        this.secondNumber = aSecondNumber;
    }

    /**
     * Get second number.
     *
     * @return Second number.
     */
    public int getSecondNumber() {
        return secondNumber;
    }

    /**
     * Adds the first number and second number together.
     *
     * @return next logical outcome.
     */
    public String add() {
       
        result = calculator.add(firstNumber, secondNumber);

        return "success";
    }

    /**
     * Multiplies the first number and second number together.
     *
     * @return next logical outcome.
     */
    public String multiply() {

        result = calculator.multiply(firstNumber, secondNumber);
       
        return "success";
    }
}

<jsp:forward page="/calc/calculator.jsp" />

<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>

<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>

의문 1. 내가 원하는 메시지를 보여주고 싶을 땐 <h:message>를 어떻게 설정해야 하나?

의문 2. 인자가 있는 메소드도 지원할까? 지원한다면, 어떻게 써야 하나?

<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
...
<f:view>
  First Number: <h:outputText id="firstNumber" value="#{CalcBean.firstNumber}"/>
  <br />
  Second Number: <h:outputText id="secondNumber" value="#{CalcBean.secondNumber}"/>
  <br />
  Result: <h:outputText id="result" value="#{CalcBean.result}"/>
  <br />
</f:view>