[IT]/JSP
EL.parameter
givemebro
2021. 4. 22. 16:41
반응형
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>EL parameter</title>
</head>
<body>
<a href="step2-2.jsp?command=insert&name=아이유">gogo</a>
</body>
</html><%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>EL parameter</title>
</head>
<body>
1. scriptlet 방식:
<%=request.getParameter("command")%>
<%=request.getParameter("name")%>
<%=request.getParameter("age")%><%-- null 이 출력됨 --%>
<hr>
<%-- EL에서 null은 보여주지 않는다 --%>
2. EL 방식: ${param.command } ${param.name } ${param.age}
<form action="step2-3.jsp">
별명<input type="text" name="nick" required="required"><br>
나이<input type="number" name="age" required="required"><br>
<input type="submit" value="등록">
</form>
</body>
</html><%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>EL parameter</title>
</head>
<body>
1. scriptlet 방식:
<%=request.getParameter("nick")%>
<%-- 나이에 +1 --%>
<%
int age = Integer.parseInt(request.getParameter("age"));
%>
<%=age + 1%>
<%=request.getParameter("age") + 1%>
<hr>
2. EL 방식 ${param.nick} ${param.age+1 }
<%-- EL은 자동 형변환 --%>
</body>
</html>반응형