[JSP/Servlet] 두수의 합을 구하는 예제

두 수에 대한 합을 구하는 서블릿 클래스

package unit02;

import java.io.IOException;

import javax.servlet.RequestDispatcher;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

@WebServlet("/AdditionServlet")

public class AdditOnServlet extends HttpServlet{

@Override

protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

int num1 = 20;

int num2 = 10;

int add = num1+num2;

req.setAttribute("num1", num1);

req.setAttribute("num2", num2);

req.setAttribute("add", add);

RequestDispatcher dispatcher = req.getRequestDispatcher("addition03.jsp");

dispatcher.forward(req, resp);

}

두 수의 합을 출력하는 JSP

<%@ page language="java" contentType="text/html; charset=UTF-8"

pageEncoding="UTF-8"%>

<html>

<head>

<title>Addition</title>

</head>

<body>

${num1}+${num2}=${add}

</body>

</html>

결과

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