685
No
1. main.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script src="http://code.jquery.com/jquery-3.2.1.min.js"></script>
</head>
<body>
<%
RequestDispatcher rd=
request.getRequestDispatcher("template.jsp?CONTENTPAGE=content.jsp");
rd.forward(request, response);
%>
<jsp:forward page="template.jsp">
<jsp:param value="content.jsp" name="CONTENTPAGE" />
</jsp:forward>
</body>
</html>
2. includeParamTest.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script src="http://code.jquery.com/jquery-3.2.1.min.js"></script>
</head>
<body>
<!-- includeParamTest.jsp -->
<%
request.setCharacterEncoding("utf-8");
String name="김철수";
String pageName="includedParamTest.jsp";
%>
포함하는 페이지 입니다.
<jsp:include page="<%= pageName %>" >
<jsp:param value="<%= name %>" name="name" />
<jsp:param value="<%= pageName %>" name="pageName" />
</jsp:include>
</body>
</html>
includedParamTest.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script src="http://code.jquery.com/jquery-3.2.1.min.js"></script>
</head>
<body>
<!-- includedParamTest.jsp -->
<%-- request.getParameter("변수명") => ${param.변수명 } --%>
<h2>포함되는 페이지 : ${param.pageName }</h2>
<b>${param.name }</b>님 환영합니다.
</body>
</html>
=>출력
포함하는 페이지 입니다.
포함되는 페이지 : includedParamTest.jsp김철수님 환영합니다.
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3. forwardForm.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script src="http://code.jquery.com/jquery-3.2.1.min.js"></script>
</head>
<body>
<!-- forwardFrom.jsp -->
<%
//pageContext < request <session <application
//request 저장 영역에 변수 저장
request.setAttribute("id", "kim");
request.setAttribute("name", "김철수");
%>
<!--
forward : url 은 고정, 화면 이동+ 데이터 전달
redirect : url 변경
-->
<jsp:forward page="forwardTo.jsp?age=33"></jsp:forward>
</body>
</html>
forwardTo.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script src="http://code.jquery.com/jquery-3.2.1.min.js"></script>
</head>
<body>
<!-- forwardTo.jsp -->
<%-- request.getAttribute("변수명") => ${변수명 } --%>
<%-- request.getParameter("변수명") =>${param.변수명 } --%>
id : ${id }<br>
name : ${name} <br>
age :${param.age }
</body>
</html>
출력 =>
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id : kim
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4. fowardParamForm.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script src="http://code.jquery.com/jquery-3.2.1.min.js"></script>
</head>
<body>
<!-- fowardParamForm.jsp -->
<form method="post"
action="<%= request.getContextPath() %>/ch05_servlet/forward.do">
이름 : <input name="name"><br>
색상 :
<select name="color">
<option value="blue">파랑</option>
<option value="green">초록</option>
<option value="red">빨강</option>
</select>
<br>
<input type="submit" value="확인">
</form>
</body>
</html>
class ForwardController
package ch05;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
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("/ch05_servlet/forward.do")
public class ForwardController extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//자바의 기본인코딩이 iso -8859-1(서유럽언어)
//폼의 입력값
request.setCharacterEncoding("utf-8");
String name=request.getParameter("name");
String color =request.getParameter("color");
System.out.println("이름:" + name);
System.out.println("색상 : " + color);
String message = "";
switch(color){
case "blue":
message ="자기탐구와 내적성장을 상징";
break;
case "green":
message ="기분의 안정과 온화함을 상징";
break;
case "red":
message ="생명을 상징";
break;
}
message +=" 하는 색입니다.";
// request.setAttribute("name", name);
// request.setAttribute("color", color);
// request.setAttribute("message", message);
Map<String, Object> map =new HashMap<>();
map.put("name", name);
map.put("color", color);
map.put("message", message);
request.setAttribute("map", map);//맵을 저장
String page="/ch05_2/color.jsp";
RequestDispatcher rd=
request.getRequestDispatcher(page);
rd.forward(request, response);//포워딩
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}
color.jsp
<%@page import="java.util.Map"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script src="http://code.jquery.com/jquery-3.2.1.min.js"></script>
</head>
<body>
<!-- color.jsp -->
<%
// request.getAttribute("변수명");
Map<String, String> map
=(Map<String, String>)request.getAttribute("map");
String name=map.get("name");//맵에 저장된 값을 조회
String color=map.get("color");
String message=map.get("message");
%>
<%= name %> 님이 좋아하는 색상은
<span style="color:<%=color %>" >
<%= color %>
</span>
이고
<%= message %>
</body>
</html>
출력 =>
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이름 :
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홍길동 님이 좋아하는 색상은 blue 이고 자기탐구와 내적성장을 상징 하는 색입니다.
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