package org.jboss.demo.ejb3;

import javax.ejb.Remote;

@Remote
public interface Calculator {
    public int add(int a, int b);
    public int multiply(int a, int b);
}

package org.jboss.demo.ejb3;

import javax.ejb.Stateless;

/**
 * Session Bean implementation class TestEJB
 */
@Stateless
public class CalculatorBean implements Calculator {

    /**
     * Default constructor. 
     */
    public CalculatorBean() {
        System.out.println("Calculator Bean");
    }

    public int add(int a, int b) {
        return a + b;
    }
    
    public int multiply(int a, int b) {
        return a + b;
    }

}

package org.jboss.demo.web;

import java.io.IOException;
import java.io.PrintWriter;

import javax.ejb.EJB;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.jboss.demo.ejb3.Calculator;

/**
 * Servlet implementation class ProvAccount
 */
public class CalcServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
    
    // if ejb is local, you should use @EJB(beanName="CalculatorBean/local")
    // 만약 ejb 비즈니스 인터페이스가 로컬이라면 mappedName 대신 beanName을 사용합니다.
    @EJB(mappedName="CalculatorBean/remote")
    private Calculator calc;
    /**
     * @see HttpServlet#HttpServlet()
     */
    public CalcServlet() {
        super();
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        process(request, response);
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        process(request, response);
    }
    
    public void process(HttpServletRequest request, HttpServletResponse response)  throws ServletException, IOException{
        System.out.println("REQUEST FROM CLIENT : " +  request);
        
        String firstNumber = request.getParameter("firstNumber");
        String secondNumber = request.getParameter("secondNumber");
        
        int a = 0;
        int b = 0;
        if( firstNumber != null) a = Integer.parseInt(firstNumber);
        if( secondNumber != null) b = Integer.parseInt(secondNumber);
        
        int add = calc.add(a, b);
        int mul = calc.multiply(a, b);
        
        PrintWriter out = response.getWriter();

        out.println("add : " + add);
        out.println("multiply : " + mul);
        out.close();
    }

}

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>hello-war</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
    <description></description>
    <display-name>CalcServlet</display-name>
    <servlet-name>CalcServlet</servlet-name>
    <servlet-class>org.jboss.demo.web.CalcServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>CalcServlet</servlet-name>
    <url-pattern>/calc</url-pattern>
  </servlet-mapping>
</web-app>

크리에이티브 커먼즈 라이센스

이 저작물은 크리에이티브 커먼즈 코리아 저작자표시-비영리-동일조건변경허락 2.0 대한민국 라이센스에 따라 이용하실 수 있습니다.