cookie 계속..
로그인에서
id저장 체크하면 다음 로그인시 id남아있고 체크박스에 체크되어있게 하기
<%@page import="java.sql.*"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
String id = request.getParameter("id");
String pw = request.getParameter("pass");
int setid = 0;
if(request.getParameter("setid") != null)
setid = Integer.parseInt(request.getParameter("setid"));
//파일분할안하고 그냥 간단히
Connection cn = null;
PreparedStatement st = null;
ResultSet rs = null;
String driver = "oracle.jdbc.OracleDriver";
String url = "jdbc:oracle:thin:@localhost:1521:xe";
String sql = "SELECT name " +
"FROM users " +
"WHERE id=? AND password=? ";
try {
Class.forName(driver);
cn = DriverManager.getConnection(url, "oraclejava", "oraclejava");
st = cn.prepareStatement(sql);
st.setString(1,id);
st.setString(2,pw);
rs = st.executeQuery();
if(rs.next()) {
session.setAttribute("id", id);
session.setAttribute("name", rs.getString("name"));
Cookie cookie = new Cookie("setid", id);
if (setid == 1){
cookie.setMaxAge(60*60*24*30); //한달
} else {
cookie.setMaxAge(0); //쿠키삭제
}
response.addCookie(cookie);
response.sendRedirect("loginform.jsp");
return;
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (rs != null ) try {rs.close();} catch(Exception e){}
if (st != null ) try {st.close();} catch(Exception e){}
if (cn != null ) try {cn.close();} catch(Exception e){}
}
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<script>
alert('id 혹은 pw가 틀립니다.');
location.href='loginform.jsp';
</script>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
String id = null;
String name = null;
String setid="";
if(session.getAttribute("id") != null) {
id = (String) session.getAttribute("id");
name = (String)session.getAttribute("name");
}
Cookie[] cookies = request.getCookies();
if (cookies != null){
int cook_len = cookies.length;
for(int i=0; i<cook_len; i++){
if(cookies[i].getName().equals("setid")){
setid = cookies[i].getValue();
}
}
}
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<% if (id == null || id == "") { %>
<body onload="javascript:document.loginform.id.focus();">
<form name="loginform" action="loginpro.jsp" method="post">
<table>
<tr>
<td>ID</td>
<td><input type="text" name="id" value="<%=setid %>" /></td>
</tr>
<tr>
<td>PW</td>
<td><input type="password" name="pass" /></td>
</tr>
<tr>
<td colspan="2">
<input type="checkbox" name="setid" value="1"
<%if(setid != "") { %> checked <% } %>
/> id 저장
</td>
</tr>
<tr>
<td colspan="2">
<input type="submit" value="로그인" />
<input type="reset" value="재입력" />
</td>
</tr>
</table>
</form>
</body>
<% } else { %>
<body>
<h1><%=name %>님이 로그인 되었습니다.</h1><br/>
<a href="logout.jsp">로그아웃</a>
</body>
<% } %>
</html>
이제 체크한 상태에서 로그아웃해도 아이디값은 남아있지..
그런데..
조금 편하게 자바클래스를 만들어서 사용해보자..
Cooker 만들어 써보자.
package cookie;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
public class Cooker {
//쿠키를 저장할 맵(키값-이름,value값-쿠키)
private Map<String, Cookie> cookieMap = new HashMap<String, Cookie>();
//생성자 넘겨받은 request객체에서 쿠키를 읽어 맵에 저장해 놔..
public Cooker(HttpServletRequest request) {
Cookie[] cookies = request.getCookies();
if(cookies!=null){
for(int i=0; i<cookies.length; i++){
cookieMap.put(cookies[i].getName(), cookies[i]);
}
}
}
//Cookie가 존재하는지
public boolean exist(String name){
return cookieMap.get(name) != null;
}
//실제 쿠키타입을 리턴해주는 메서드
public Cookie getCookie(String name){
return cookieMap.get(name);
}
//쿠키의 값을 꺼내는..
public String getValue(String name) throws UnsupportedEncodingException{
Cookie cookie = cookieMap.get(name);
if(cookie == null) return null;
else return URLDecoder.decode(cookie.getValue(), "UTF-8");
}
//쿠키생성 (static이니 아무데서나 객체생성없이 바로 쓸 수 있지)
public static Cookie createCookie(String name, String value)
throws UnsupportedEncodingException{
return new Cookie(name, URLEncoder.encode(value, "UTF-8"));
}
//쿠키생성
public static Cookie create(String name, String value, int maxAge)
throws UnsupportedEncodingException{
Cookie cookie = new Cookie(name, URLEncoder.encode(value, "UTF-8"));
cookie.setMaxAge(maxAge);
return cookie;
}
}
이제 이 편하게 Cooker를 사용해보자.
<%@page import="cookie.Cooker"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
String id = null;
String name = null;
String setid="";
if(session.getAttribute("id") != null) {
id = (String) session.getAttribute("id");
name = (String)session.getAttribute("name");
}
Cooker cooker = new Cooker(request);
if(cooker.exist("setid")){
setid = cooker.getValue("setid");
}
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<% if (id == null || id == "") { %>
<body onload="javascript:document.loginform.id.focus();">
<form name="loginform" action="loginpro.jsp" method="post">
<table>
<tr>
<td>ID</td>
<td><input type="text" name="id" value="<%=setid %>" /></td>
</tr>
<tr>
<td>PW</td>
<td><input type="password" name="pass" /></td>
</tr>
<tr>
<td colspan="2">
<input type="checkbox" name="setid" value="1"
<%if(setid != "") { %> checked <% } %>
/> id 저장
</td>
</tr>
<tr>
<td colspan="2">
<input type="submit" value="로그인" />
<input type="reset" value="재입력" />
</td>
</tr>
</table>
</form>
</body>
<% } else { %>
<body>
<h1><%=name %>님이 로그인 되었습니다.</h1><br/>
<a href="logout.jsp">로그아웃</a>
</body>
<% } %>
</html>
<%@page import="cookie.Cooker"%>
<%@page import="java.sql.*"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
String id = request.getParameter("id");
String pw = request.getParameter("pass");
int setid = 0;
if(request.getParameter("setid") != null)
setid = Integer.parseInt(request.getParameter("setid"));
//파일분할안하고 그냥 간단히
Connection cn = null;
PreparedStatement st = null;
ResultSet rs = null;
String driver = "oracle.jdbc.OracleDriver";
String url = "jdbc:oracle:thin:@localhost:1521:xe";
String sql = "SELECT name " +
"FROM users " +
"WHERE id=? AND password=? ";
try {
Class.forName(driver);
cn = DriverManager.getConnection(url, "oraclejava", "oraclejava");
st = cn.prepareStatement(sql);
st.setString(1,id);
st.setString(2,pw);
rs = st.executeQuery();
if(rs.next()) {
session.setAttribute("id", id);
session.setAttribute("name", rs.getString("name"));
if(setid == 1)
response.addCookie(Cooker.createCookie("setid", id,60*60*24*30 ));
else
response.addCookie(Cooker.createCookie("setid", id, 0));
response.sendRedirect("loginform.jsp");
return;
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (rs != null ) try {rs.close();} catch(Exception e){}
if (st != null ) try {st.close();} catch(Exception e){}
if (cn != null ) try {cn.close();} catch(Exception e){}
}
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<script>
alert('id 혹은 pw가 틀립니다.');
location.href='loginform.jsp';
</script>
</body>
</html>
간단해졌지?
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