[JSP/Servlet] 초기파라미터를 제공하는 EL 예제
- BACKEND/Servlet&JSP
- 2017. 5. 17. 17:34
초기파라미터를 제공하는 EL(Expression Language) 내장객체 initparam 이용한 확인 예제
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">
<display-name>myjsp</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<!-- 초기파라미터 - context root경로 -->
<context-param>
<param-name>rootPath</param-name>
<param-value>/myjsp</param-value>
</context-param>
</web-app>
request.jsp
<%@page import="java.util.Date"%>
<%@page import="java.text.SimpleDateFormat"%>
<%@ page contentType="text/html;charset=UTF-8"%>
<%
Cookie c = new Cookie("currentTime",new SimpleDateFormat("HH:mm:ss").format(new Date()));
response.addCookie(c);
%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h2>Context Root 경로 명</h2>
<%=application.getContextPath() %><br>
<%=application.getInitParameter("rootPath") %><br>
${initParam.rootPath }<%--초기파라미터를 제공하는 EL 내장객체 initParam --%>
<form action = "${initParam.rootPath }/el/exam3.jsp">
나이 : <input type="number" name = "age"><br>
취미 : <br>
<label>게임<input type="checkbox" name="hobby" value="게임"></label>
<label>독서<input type="checkbox" name="hobby" value="독서"></label>
<label>영화감상<input type="checkbox" name="hobby" value="영화감상"></label>
<input type="submit" value="전송">
<button>전송2</button>
</form>
</body>
</html>
exam3.jsp
<%@ page contentType="text/html;charset=UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h2>쿠키값 출력</h2>
${cookie.currentTime.value } <!-- 쿠키값 EL : cookie.쿠키이름.value -->
<h2>요청파라미터 출력</h2>
age : ${param.age }<!-- request.getParameter("age")출력과 동일함 -->
<br>
취미 : ${paramValues.hobby }<!-- request.getParameterValues("hobby") : String[] -->
<br>
${paramValues.hobby[0]} - ${paramValues.hobby[1]} -${paramValues.hobby[2]}
</body>
</html>
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