스크립트 태그
| 스크립틀릿(Scriptlet) | 선언문(declaration) | 표현문 |
| <% ... %> | <%! ... %> | <%= ... %> |
| (지역성) 자바 문법 사용 메소드 없이 변수만을 선언 |
(전역성) 자바 변수나 메서드 정의 | 문자열 형태로 출력 세미콜론으로 종료할 수 없음 |
<%@ page language="java" contentType="text/html; charset=UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<title>Scripting Tag</title>
</head>
<body>
<h2>Scripting Tag</h2>
<%! // 선언문 태그 (변수, 메서드 선언)
// 전역 변수 선언
int count = 3;
// 전역 메서드 선언 (영문 소문자로 변환하여 리턴)
// String : 리턴 타입 / data : 매개변수(파라미터(인수)를 받음)
// 접근제한자 생략 시 open 범위는 >> 동일 패키지 (default)
String makeItLower(String data){
return data.toLowerCase();
}
%>
<% // 스크립틀릿 태그(자바 로직 코드 생성)
// 지역 변수 i. 1부터 3까지 1씩 증가
for(int i=1; i<=count; i++){
// out : JSP의 기본 내장 객체 - 화면에 출력 (PrintWrite)
out.println("Java Server Pages " + i + ".<br />");
}
%>
<!-- 표현문 태그 -->
<%=makeItLower("HELLO WORLD") %>
</body>
</html>더보기
/*
* Generated by the Jasper component of Apache Tomcat
* Version: Apache Tomcat/9.0.90
* Generated at: 2024-06-24 08:08:35 UTC
* Note: The last modified time of this file was set to
* the last modified time of the source file after
* generation to assist with modification tracking.
*/
package org.apache.jsp.ch02;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
public final class scripting_jsp extends org.apache.jasper.runtime.HttpJspBase
implements org.apache.jasper.runtime.JspSourceDependent,
org.apache.jasper.runtime.JspSourceImports {
// 선언문 태그 (변수, 메서드 선언)
// 전역 변수 선언
int count = 3;
// 전역 메서드 선언 (영문 소문자로 변환하여 리턴)
// String : 리턴 타입 / data : 매개변수(파라미터(인수)를 받음)
// 접근제한자 생략 시 open 범위는 >> 동일 패키지 (default)
String makeItLower(String data){
return data.toLowerCase();
}
private static final javax.servlet.jsp.JspFactory _jspxFactory =
javax.servlet.jsp.JspFactory.getDefaultFactory();
private static java.util.Map<java.lang.String,java.lang.Long> _jspx_dependants;
private static final java.util.Set<java.lang.String> _jspx_imports_packages;
private static final java.util.Set<java.lang.String> _jspx_imports_classes;
static {
_jspx_imports_packages = new java.util.LinkedHashSet<>(4);
_jspx_imports_packages.add("javax.servlet");
_jspx_imports_packages.add("javax.servlet.http");
_jspx_imports_packages.add("javax.servlet.jsp");
_jspx_imports_classes = null;
}
private volatile javax.el.ExpressionFactory _el_expressionfactory;
private volatile org.apache.tomcat.InstanceManager _jsp_instancemanager;
public java.util.Map<java.lang.String,java.lang.Long> getDependants() {
return _jspx_dependants;
}
public java.util.Set<java.lang.String> getPackageImports() {
return _jspx_imports_packages;
}
public java.util.Set<java.lang.String> getClassImports() {
return _jspx_imports_classes;
}
public javax.el.ExpressionFactory _jsp_getExpressionFactory() {
if (_el_expressionfactory == null) {
synchronized (this) {
if (_el_expressionfactory == null) {
_el_expressionfactory = _jspxFactory.getJspApplicationContext(getServletConfig().getServletContext()).getExpressionFactory();
}
}
}
return _el_expressionfactory;
}
public org.apache.tomcat.InstanceManager _jsp_getInstanceManager() {
if (_jsp_instancemanager == null) {
synchronized (this) {
if (_jsp_instancemanager == null) {
_jsp_instancemanager = org.apache.jasper.runtime.InstanceManagerFactory.getInstanceManager(getServletConfig());
}
}
}
return _jsp_instancemanager;
}
public void _jspInit() {
}
public void _jspDestroy() {
}
public void _jspService(final javax.servlet.http.HttpServletRequest request, final javax.servlet.http.HttpServletResponse response)
throws java.io.IOException, javax.servlet.ServletException {
if (!javax.servlet.DispatcherType.ERROR.equals(request.getDispatcherType())) {
final java.lang.String _jspx_method = request.getMethod();
if ("OPTIONS".equals(_jspx_method)) {
response.setHeader("Allow","GET, HEAD, POST, OPTIONS");
return;
}
if (!"GET".equals(_jspx_method) && !"POST".equals(_jspx_method) && !"HEAD".equals(_jspx_method)) {
response.setHeader("Allow","GET, HEAD, POST, OPTIONS");
response.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED, "JSP들은 오직 GET, POST 또는 HEAD 메소드만을 허용합니다. Jasper는 OPTIONS 메소드 또한 허용합니다.");
return;
}
}
final javax.servlet.jsp.PageContext pageContext;
javax.servlet.http.HttpSession session = null;
final javax.servlet.ServletContext application;
final javax.servlet.ServletConfig config;
javax.servlet.jsp.JspWriter out = null;
final java.lang.Object page = this;
javax.servlet.jsp.JspWriter _jspx_out = null;
javax.servlet.jsp.PageContext _jspx_page_context = null;
try {
response.setContentType("text/html; charset=UTF-8");
pageContext = _jspxFactory.getPageContext(this, request, response,
null, true, 8192, true);
_jspx_page_context = pageContext;
application = pageContext.getServletContext();
config = pageContext.getServletConfig();
session = pageContext.getSession();
out = pageContext.getOut();
_jspx_out = out;
out.write("\r\n");
out.write("<!DOCTYPE html>\r\n");
out.write("<html>\r\n");
out.write("<head>\r\n");
out.write("<title>Scripting Tag</title>\r\n");
out.write("</head>\r\n");
out.write("<body>\r\n");
out.write(" <h2>Scripting Tag</h2>\r\n");
out.write(" ");
out.write("\r\n");
out.write(" \r\n");
out.write(" ");
// 스크립틀릿 태그(자바 로직 코드 생성)
// 지역 변수 i. 1부터 3까지 1씩 증가
for(int i=1; i<=count; i++){
// out : JSP의 기본 내장 객체 - 화면에 출력 (PrintWrite)
out.println("Java Server Pages " + i + ".<br>");
}
out.write("\r\n");
out.write(" \r\n");
out.write(" ");
out.print(makeItLower("HELLO WORLD") );
out.write("\r\n");
out.write(" \r\n");
out.write("</body>\r\n");
out.write("</html>");
} catch (java.lang.Throwable t) {
if (!(t instanceof javax.servlet.jsp.SkipPageException)){
out = _jspx_out;
if (out != null && out.getBufferSize() != 0)
try {
if (response.isCommitted()) {
out.flush();
} else {
out.clearBuffer();
}
} catch (java.io.IOException e) {}
if (_jspx_page_context != null) _jspx_page_context.handlePageException(t);
else throw new ServletException(t);
}
} finally {
_jspxFactory.releasePageContext(_jspx_page_context);
}
}
}<%@ page language="java" contentType="text/html; charset=UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<title>Scripting Tag</title>
</head>
<body>
<%! // 선언문 태그
// 정수형 변수. 할당(대입)
int data = 50;
// 전역 메서드
// 매개변수, 리턴타입
public int sum(int a, int b){
return a+b;
};
public String makeItLower(String name){
return name.toLowerCase();
}
%>
<% // 스크립틀릿
out.println("data : "+data+"<br>");
out.println("2 + 3 = "+sum(2,3)+"<br>"); // 파라미터, (메서드) 호출
out.println(makeItLower("HELLO DUCK")+"<br>");
%>
</body>
</html><%@ page language="java" contentType="text/html; charset=UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<title>Scripting Tag</title>
</head>
<body>
<% // 스크립틀릿
// ** 지역변수
// 선언과 동시에 값을 할당 ==> 초기화
int a = 2;
int b = 3;
int sum = a+b;
// out객체 : JSP기본 내장 객체
out.print(a+" + "+b+" = "+sum);
%>
</body>
</html><%@ page language="java" contentType="text/html; charset=UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<title>Scripting Tag</title>
</head>
<body>
<% // 스크립틀릿
// 0부터 10까지의 짝수를 화면에 출력
for(int i=0; i<=10; i=i+2){
out.print(i+"<br>");
}
%>
</body>
</html><%@ page language="java" contentType="text/html; charset=UTF-8"%>
<%@ page import="java.util.Date"%>
<!DOCTYPE html>
<html>
<head>
<title>Scripting Tag</title>
</head>
<body>
<% // 스크립틀릿
// 지역변수
int a = 10;
int b = 20;
int c = 30;
out.print(a + b + c + "<br>");
%>
<!-- 표현문 -->
<p>오늘은 <%=new Date().getDate()%>일 입니다.</p>
<p><%=a + b + c %></p>
</body>
</html><%@ page language="java" contentType="text/html; charset=UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<title>Welcome</title>
<link rel="stylesheet" href="/css/bootstrap.min.css">
</head>
<body>
<nav class="navbar navbar-expand navbar-dark bg-dark">
<div class="container">
<div class="navbar-header">
<a class="navbar-brand" href="/welcome.jsp">Home</a>
</div>
</div>
</nav>
<%! // 선언문
// 전역변수
String greeting = "Welcome to My Page";
String tagline = "I want to sleep";
%>
<!-- 표현문 -->
<div class="jumbotron">
<div class="container">
<h1 class="display-3"><%=greeting %></h1>
</div>
</div>
<div class="container">
<div class="text-center">
<h3><%=tagline %></h3>
</div>
</div>
<footer class="container">
<p>© 오리</p>
</footer>
</body>
</html>