jsp2
2024. 1. 4. 21:19ㆍDaily Codig Reminder
login
<%@ 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>
<%
request.setCharacterEncoding("utf-8");
String userid = request.getParameter("userid");
String passwd= request.getParameter("passwd");
out.print(userid+"<br>");
out.print(passwd+"<br>");
%>
사용자 id: <%=userid %><br>
패스워드: <%=passwd %><br>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>로그인화면</title>
</head>
<body>
<h1>로그인화면</h1>
<form action="login.jsp" method="post">
아이디:<input type="text" name="userid"><br>
비밀번호:<input type="text" name="passwd"><br>
<input type="submit" value="로그인">
</form>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>로그인화면</title>
</head>
<body>
<h1>로그인화면</h1>
<form action="login.jsp" method="post">
아이디:<input type="text" name="userid"><br>
비밀번호:<input type="text" name="passwd"><br>
<input type="submit" value="로그인">
</form>
</body>
</html>
taglib
<%@ 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 type="text/css">
h1{color: red;}
</style>
</head>
<body>
<%= request.getContextPath() %><br>
<a href="include/top.jsp">top.jsp상대주소</a><br>
<a href="/include/top.jsp">top.jsp 안됨 (root)</a><br>
<a href="/07_JSP2_include_action/include/top.jsp">top.jsp절대주소</a><br>
<a href="<%= request.getContextPath() %>/include/top.jsp">top.jsp(request)</a><br>
<a href="test.jsp">test.jsp</a><br>
<% request.setAttribute("xxx", "홍길동");
String userid=request.getParameter("userid");
String name="aaa";
%>
first.jsp<br>
userid= <%=userid %><br>
아래화면은 top.jsp를 jsp:include 시킨 내용입니다.
<hr>
<jsp:include page="include/top.jsp" flush="true"/>
<hr>
다시 first.jsp 내용입니다
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%! int num=10; %>
<h1>top.jsp</h1>
<%
String mesg =(String)request.getAttribute("second");
String userid=request.getParameter("userid");
%>
<h1>
안녕하세요? mesg===<%=mesg%> <br>
userid====<%=userid%><br>
</h1>
<a href="../test.jsp">1)test.jsp</a><br>
<a href="test.jsp">2) test.jsp</a><br>
<a href="<%= request.getContextPath() %>/test.jsp">3) test.jsp</a><br>
numm===== <%=num%>
<%@ 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>
<%
request.setAttribute("xxx", "second");
%>
second.jsp
아래는 top을 jsp:include 시킨 내용입니다.
<br>
<hr>
<jsp:include page="include/top.jsp" flush="true"></jsp:include>
<hr>
<br>
다시 second.jsp입니다.
</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>
test.jsp
</body>
</html>jsp요청위임
1)기존처리방식
사용자 testservlet
⇒ testservlet.doget(request, response)
요청데이터 파싱, 응답처리까지 모두 처리
2,)응답처리 위임
1. response.sendRedirect
사용자 testservlet
⇒ testServlet.doGet(reauest, response)
요청데이터 파싱, 데이터 처리 응답처리 코드 없이
응답처리를 다른 servlet , jsp에 위임
2. RequestDispatcher.forward 반식
RequestDispather dis = request.getRequestDispather(”hello.jsp”);
dis.forward(request, response);
package com.controller;
import java.io.IOException;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
@WebServlet("/TestController")
public class TestController extends HttpServlet {
private static final long serialVersionUID = 1L;
public TestController() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("TestController.doGet");
request.setAttribute("request", "홍길동");
HttpSession session = request.getSession();
session.setAttribute("session", "이순신");
ServletContext ctx = getServletContext();
ctx.setAttribute("application", "유관순");
// response.sendRedirect("test.jsp");
// response.sendRedirect("TestController2");
response.sendRedirect("hello.jsp");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}
package com.controller;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
@WebServlet("/TestController2")
public class TestController2 extends HttpServlet {
private static final long serialVersionUID = 1L;
public TestController2() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("TestController2.doGet");
String v1 = (String)request.getAttribute("request");
HttpSession session = request.getSession();
String v2 = (String)session.getAttribute("session");
ServletContext ctx = getServletContext();
String v3 = (String)ctx.getAttribute("application");
System.out.println(v1+"\t"+v2+"\t"+v3);
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
out.print("<html><body>");
out.print("<h1>TestController2</h1>");
out.print("request : "+v1+"<br>");
out.print("session : "+v2+"<br>");
out.print("application : "+v3+"<br>");
out.print("</body></html>");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}
<%@ 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>
<h1>hello.jsp</h1>
<%
String x= (String)request.getAttribute("request");
String x2 =(String)session.getAttribute("session");
//request는 전송이 안된다
String x3 =(String)application.getAttribute("application");
%>
1>>>><%= x %><br>
2>>>><%= x2 %><br>
3>>>><%= x3 %><br>
</body>
</html>
package com.controller;
import java.io.IOException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.dto.MemberDTO;
@WebServlet("/TestController")
public class TestController extends HttpServlet {
private static final long serialVersionUID = 1L;
public TestController() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("TestController.doGet");
MemberDTO dto = new MemberDTO("BBB", 10);
request.setAttribute("request", "홍길동");
request.setAttribute("request2", "aaa");
request.setAttribute("request3", dto);
HttpSession session = request.getSession();
session.setAttribute("session", "이순신");
ServletContext ctx = getServletContext();
ctx.setAttribute("application", "유관순");
RequestDispatcher dis = request.getRequestDispatcher("hello.jsp");
dis.forward(request, response);
// response.sendRedirect("test.jsp");
// response.sendRedirect("TestController2");
// response.sendRedirect("hello.jsp");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}package com.controller;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
@WebServlet("/TestController2")
public class TestController2 extends HttpServlet {
private static final long serialVersionUID = 1L;
public TestController2() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("TestController2.doGet");
String v1 = (String)request.getAttribute("request");
String vv = (String)request.getAttribute("request2");
HttpSession session = request.getSession();
String v2 = (String)session.getAttribute("session");
ServletContext ctx = getServletContext();
String v3 = (String)ctx.getAttribute("application");
System.out.println(v1+"\t"+vv+"\t"+v2+"\t"+v3);
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
out.print("<html><body>");
out.print("<h1>TestController2</h1>");
out.print("request : "+v1+"<br>");
out.print("session : "+v2+"<br>");
out.print("application : "+v3+"<br>");
out.print("</body></html>");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="com.dto.MemberDTO" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
String x= (String)request.getAttribute("request");
String xx= (String)request.getAttribute("request2");
MemberDTO dto= (MemberDTO)request.getAttribute("request3");
String x2 =(String)session.getAttribute("session");
//request는 전송이 안된다
String x3 =(String)application.getAttribute("application");
%>
1>>>><%= x %><br>
11>>>><%= xx %><br>
2>>>><%= x2 %><br>
3>>>><%= x3 %><br>
4>>>><%= dto.getName() %> : <%= dto.getAge() %><br>
</body>
</html>
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