[JSP] ch03-04. Redirect Login

3-4. 

Redirect Login

LoginService.java

package ch03.ex04;

public class LoginService {
    private String userId = "blueid";
    private String userPw = "bluepw";
    
    public boolean check(String userId, String userPw){
        return userId.equals(this.userId) && userPw.equals(this.userPw);
    }
}​

 

redirectLoginIn.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<form action="redirectLoginProc.jsp" method="post">
    <label>아이디: <input type="text" name="userId" /></label><br>
    <label>암 호: <input type="password" name="userPw" /></label><br>
    <input type="submit"/>
</form>
<%
    String msgId = request.getParameter("msgId");
    if(msgId != null && !msgId.equals("") && msgId.equals("-1")){
%>
    <br>로그인 정보가 틀렸습니다.
<%
    }
%>

 

redirectLoginProc.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ page import="ch03.ex04.LoginService"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%
    LoginService checker = new LoginService();

    String userId = request.getParameter("userId");
    String userPw = request.getParameter("userPw");
    
    if(userId != null && !userId.equals("")
            && userPw != null && !userPw.equals("")){
        userId = userId.trim();
        userPw = userPw.trim();
    }
    boolean isValid = checker.check(userId, userPw);
    if(!isValid) response.sendRedirect("redirectLoginIn.jsp?msgId=-1");
    else response.sendRedirect("redirectLoginOut.jsp"
            +"?userId="+userId+"&userPw="+userPw);
%>

<!-- 
파라미터값을 보내주는 유형 2가지
1. form으로 보내주기
2. 쿼리 스트링(URL)을 이용해서 보내주기
 -->

 

redirectLoginOut.jsp

 

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%
    String userId = request.getParameter("userId");
    String userPw = request.getParameter("userPw");
%>
<h3>다음 정보로 로그인 성공했습니다.</h3>
아이디: <%= userId%><br>
암 호: <%= userPw%>