AdderInput.html에서 값을 받고 AdderServlet.java에서 값을 처리한 후 합을 띄운다.
AdderInput.html
<!DOCTYPE html>
<html>
<head>
<meta charset="EUC-KR">
<title>Insert title here</title>
</head>
<body>
<FORM ACTION=/ch2_jsp/adder>
첫번째 수 : <INPUT TYPE=TEXT NAME=NUM1><BR>
두번째 수 : <INPUT TYPE=TEXT NAME=NUM2><BR>
<INPUT TYPE=SUBMIT VALUE='더하기'>
</FORM>
</body>
</html>
AdderServlet.java
package com.exam.jsp;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class AdderServlet
*/
@WebServlet("/AdderServlet")
public class AdderServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public AdderServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
String str1 = request.getParameter("NUM1");
String str2 = request.getParameter("NUM2");
int num1 = Integer.parseInt(str1);
int num2 = Integer.parseInt(str2);
int sum = num1 + num2;
response.setContentType("text/html; charset=euc-kr");
PrintWriter out = response.getWriter();
out.println("<HTML>");
out.println(
"<HEAD><TITLE>덧셈 프로그램 - 결과 화면</TITLE></HEAD>");
out.println("<BODY>");
out.printf("%d + %d = %d", num1, num2, sum);
out.println("</BODY>");
out.println("</HTML>");
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
}
마지막으로 가장 중요한 web.xml
<?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_3_0.xsd" id="WebApp_ID" version="3.0">
<servlet>
<servlet-name>adder-servlet</servlet-name>
<servlet-class>com.exam.jsp.AdderServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>adder-servlet</servlet-name>
<url-pattern>/adder</url-pattern>
</servlet-mapping>
</web-app>
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