1. jsp란 무엇인가?
- javaserverPages
- HTML 코드에 java 코드를 넣어 동적 웹페이지를 생성하는 웹 어플리케이션 도구임
- jsp가 실행되면 자바 서블릿으로 변환되며 웹 어플리케이션 서버에서 동작되면서 필요한 기능을 수행하고 그렇게 생성된 데이터를 웹페이지와 함께 클라이언트로 응답함
- 서블릿 기반의 '서버 스크립트 기술'
- HTML + Java = jsp
- HTML을 중심으로 Java와 연동하여 사용하는 웹 언어
<%
int x = 5;
int y = 6;
%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<style>
input {
width: 50px;
height: 50px;
}
.output{
height: 50px;
background: #e9e9e9;
font-size: 24px;
font-weight: bold;
text-align: right;
padding: 0px 5px;
}
</style>
</head>
<body>
<form action="calc3" method="post">
<table>
<tr>
<td class="output" colspan="4"><%= x+y %></td>
</tr>
<tr>
<td><input type="submit" name="operator" value="CE"></td>
<td><input type="submit" name="operator" value="C"></td>
<td><input type="submit" name="operator" value="BS"></td>
<td><input type="submit" name="operator" value="/"></td>
</tr>
<tr>
<td><input type="submit" name="value" value="7"></td>
<td><input type="submit" name="value" value="8"></td>
<td><input type="submit" name="value" value="9"></td>
<td><input type="submit" name="operator" value="-"></td>
</tr>
<tr>
<td><input type="submit" name="value" value="4"></td>
<td><input type="submit" name="value" value="5"></td>
<td><input type="submit" name="value" value="6"></td>
<td><input type="submit" name="operator" value="*"></td>
</tr>
<tr>
<td><input type="submit" name="value" value="1"></td>
<td><input type="submit" name="value" value="2"></td>
<td><input type="submit" name="value" value="3"></td>
<td><input type="submit" name="operator" value="+"></td>
</tr>
<tr>
<td></td>
<td><input type="submit" name="value" value="0"></td>
<td><input type="submit" name="dot" value="."></td>
<td><input type="submit" name="operator" value="="></td>
</tr>
</table>
</form>
</body>
</html>2. 스크립트 태그
: HTML 코드에 자바 코드를 넣어 프로그램이 수행할 기능을 구현할 수 있음
<%@page import="java.util.Date"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<%-- <p>Today's Date : <%=new java.util.Date() %></p> --%>
<p>Today's Date : <%=new Date() %></p>
</body>
</html><%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<!-- <table border="1">
<tr>
<td>1행 1열</td>
<td>1행 2열</td>
<td>1행 3열</td>
<td>1행 4열</td>
<td>1행 5열</td>
</tr>
</table> -->
<table border="1">
<%
for(int i=1; i<=3; i++) {
%>
<tr>
<%
for(int j=1; j<=5; j++) {
%>
<td><%=i%>행 <%=j%>열</td>
<%
}
%>
</tr>
<%
}
%>
</table>
</body>
</html><%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<style>
.even {
color : blue;
}
.odd {
color : red;
}
</style>
</head>
<body>
<table border="1">
<%for(int i=1; i<=5; i++) {%>
<tr class="<%=i%2==0 ? "even" : "odd"%>">
<%for(int j=1; j<=i; j++) {%>
<td><%=i%>행 <%=j%>열</td>
<%}%>
</tr>
<%}%>
<%for(int i=1; i<=5; i++) {%>
<tr class="<%=(i+5)%2==0 ? "even" : "odd"%>">
<%for(int j=1; j<=6-i; j++) {%>
<td> <%=i+5%>행 <%=j%>열</td>
<%}%>
</tr>
<%}%>
</table>
</body>
</html>