[JSP] ch02-05.Pameter(파라미터) 2

2-5. Parameter(파라미터) IN / OUT 2

paraPostIn.html

<!DOCTYPE html>
<html lang="ko">
<head>
<title>HTML</title>
<meta charset="utf-8">
</head>
<body>
<form action="paraOut.jsp" method="post">
    <label>사용자명<input type="text" name="userName"/></label><br>
    <label>숫자1<input type="number" name="num1"/></label><br>
    <label>숫자2<input type="number" name="num2"/></label>
    <input type="submit"/>
</form>
</body>
</html>​

paraOut.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ page import="ch02.ex05.AddService"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%
    request.setCharacterEncoding("utf-8");
    String userName = request.getParameter("userName");
    String num1Str = request.getParameter("num1");
    String num2Str = request.getParameter("num2");
    
    int num1 = Integer.parseInt(num1Str);
    int num2 = Integer.parseInt(num2Str);
    
    AddService adder = new AddService();
%>
<%=userName%>이 요청한 계산 결과는<br>
<%=num1%> + <%=num2%> = <%=adder.add(num1,num2)%>

 

AddService.java

public class AddService {
    public int add(int num1, int num2){
        return num1+num2;
    }
}