param01.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@page import="java.net.URLEncoder"%>
<!DOCTYPE html>
<html>
<head>
<title>Action Tag</title>
</head>
<body>
<h3>param 액션 태그</h3>
<!-- ...01_data.jsp?id=admin&name=관리자 -->
<jsp:forward page="/ch04/param01_data.jsp">
<jsp:param name="id" value="admin" />
<jsp:param name="name" value='<%=URLEncoder.encode("관리자")%>' />
</jsp:forward>
<p>Java Servlet Page</p>
</body>
</html>param01_data.jsp
<%@page import="java.net.URLDecoder"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html>
<head>
<title>Action Tag</title>
</head>
<body>
<p>아이디 : <%=request.getParameter("id") %></p>
<%
String name = request.getParameter("name");
out.print("인코딩된 관리자 : " + name);
%>
<p>이름 : <%=URLDecoder.decode(name)%></p>
</body>
</html>
01에서 인코딩하고 보내서 깨져서 나옴! _data에서 디코딩 해서 관리자 라고 안깨져 나온것!
param02.jsp
<%@page import="java.net.URLEncoder"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@page import="java.util.Calendar"%>
<!DOCTYPE html>
<html>
<head>
<title>Action Tag</title>
</head>
<body>
<h3>param 액션 태그</h3>
<jsp:include page="param02_data.jsp">
<jsp:param name="title" value='<%=URLEncoder.encode("오늘의 날짜와 시각") %>' />
<jsp:param name="date" value="<%=Calendar.getInstance().getTime()%>" />
</jsp:include>
</body>
</html>param02_data.jsp
<%@page import="java.util.Enumeration"%>
<%@page import="java.net.URLDecoder"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html>
<head>
<title>Insert title here</title>
</head>
<body>
<!-- request객체 내에 title=오늘의 날짜와 시각&date=2021 -->
<%
String title = request.getParameter("title");
%>
<h3><%=URLDecoder.decode(title)%></h3>
Today is : <%=request.getParameter("date") %>
<br />
<%
Enumeration<String> attrEnum = request.getAttributeNames();
while(attrEnum.hasMoreElements()){
String name = attrEnum.nextElement();
Object value = request.getAttribute(name);
out.print("<b>"+name+"</b>="+value+"<br />");
}
%>
</body>
</html>
신입 개발자 입니다!!!