[Servlet&JSP] Chap 6-2. JSP 이용 회원 CRUD 구현하기(로그인)

김승현·2021년 11월 27일
jspservlet국비수업
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로그인 로직

  1. 사용자가 index.jsp 페이지에서 ID, PW 입력 후 로그인 버튼 클릭
    -> memberLogin.jsp 이동
  2. memberLogin.jsp에서 로그인을 위한 비즈니스 로직 처리
    -> Service -> DAO -> DB
  3. memberLogin.jsp 에서 비즈니스 로직 처리 후 리턴된 값으로 로그인 성공/ 실패 여부 확인 후 index.jsp로 이동
    • 성공 : 서버 측에 정보 저장 (session.setAttribute() 메소드 이용)
  4. index.jsp에서 session객체에 저장된 값을 확인(session.getAttribute() 메소드)하여 해당 페이지 이동
    • Member 객체 : 로그인 축하 메시지, 로그아웃
    • null : 로그인 실패 메시지, 로그인 폼
  5. 로그아웃 클릭시 logout.jsp 이동
    • session 파기(session.invalidate() 메소드)
    • index.jsp 페이지로 이동



index.jsp

<%@page import="kr.or.test.member.model.vo.Member"%>
<%@ 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">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>

	<h1>혀니의 메인 페이지</h1>
	
	
	<%
		Member m = (Member)session.getAttribute("member");
		
		//session에서 'memeber'라는 key를 가지고, 데이터를 꺼냈을때
		// 2가지 경우가 있다.
		// 1. Member 객체가 정상적으로 있는 경우(로그인을 한 사람인 경우)
		// 2. null 인 경우(로그인을 실행하였거나 혹은 로그인을 하지 않은 경우)
	%>
	
	<%if(m!=null){ %>
		[<%=m.getUserName() %>]님 환영합니다 <a href="/views/member/logout.jsp">로그아웃</a> <br>
	<%} else{%>
		<form action="/views/member/memberLogin.jsp" method="post">
		<fieldset style="width:300px;">
			<legend>로그인</legend>
			ID : <input type="text" name="userId" placeholder="ID를 입력하세요"><br>
			PW : <input type="password" name="userPwd" placeholder="패스워드를 입력하세요"><br>
			<input type="submit" value="로그인">
			</fieldset>
		</form>	
		<a href="/views/member/memberJoinUs.html">회원 가입</a>
	<%} %>

</body>
</html>



memberLogin.jsp

<%@page import="kr.or.test.member.model.vo.Member"%>
<%@page import="kr.or.test.member.model.service.MemberServiceImpl"%>
<%@page import="kr.or.test.member.model.service.MemberService"%>
<%@ 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">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
	
	<%
		String userId=request.getParameter("userId");
		String userPwd=request.getParameter("userPwd");
		
		// 로그인 비즈니스 로직 처리
		MemberService mService=new MemberServiceImpl();
		Member m = mService.selectOneIdPwdSearch(userId, userPwd);
	%>
	
	<%if(m!=null){ //로그인을 성공했다면
		
		// 서버측에 정보 저장
		session.setAttribute("member", m);
		
	%>
		
		
	<%}else{ //로그인을 실패했다면%>
		<script>
			alert('로그인 실패(ID 또는 PW 재확인 바람)');
		</script>
	
	<%} %>
	
	<script>
		location.replace('/');
	
	</script>
	
</body>
</html>



MemberService.java

package kr.or.test.member.model.service;

import kr.or.test.member.model.vo.Member;

public interface MemberService {
	
	public Member selectOneIdPwdSearch(String userId, String userPwd);
}

MemberServiceImpl.java

package kr.or.test.member.model.service;

import java.sql.Connection;

import kr.or.test.common.JDBCTemplate;
import kr.or.test.member.model.dao.MemberDAO;
import kr.or.test.member.model.vo.Member;

public class MemberServiceImpl implements MemberService {

	private MemberDAO mDAO = new MemberDAO();

	@Override
	public Member selectOneIdPwdSearch(String userId, String userPwd) {

		Connection conn = JDBCTemplate.getConnection();
		Member m = mDAO.selectOneIdPwdSearch(userId, userPwd, conn);

		JDBCTemplate.close(conn);

		return m;
	}
}



MemberDAO.java

package kr.or.test.member.model.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import kr.or.test.common.JDBCTemplate;
import kr.or.test.member.model.vo.Member;

public class MemberDAO {

	public Member selectOneIdPwdSearch(String userId, String userPwd, Connection conn) {

		PreparedStatement pstmt = null;
		ResultSet rset = null;
		Member m = null;

		String sql = "SELECT * FROM MEMBER WHERE userId=? AND userPwd=? AND end_YN='N'";

		try {
			pstmt = conn.prepareStatement(sql);
			pstmt.setString(1, userId);
			pstmt.setString(2, userPwd);

			rset = pstmt.executeQuery();

			if (rset.next()) {
				m = new Member();
				m.setUserId(rset.getString("userId"));
				m.setUserPwd(rset.getString("userPwd"));
				m.setUserName(rset.getString("userName"));
				m.setAge(rset.getInt("age"));
				m.setEmail(rset.getString("email"));
				m.setPhone(rset.getString("phone"));
				m.setHobby(rset.getString("hobby"));
				m.setAddress(rset.getString("address"));
				m.setGender(rset.getString("gender").charAt(0));
				m.setEnrollDate(rset.getDate("enrollDate"));
				m.setEndYN(rset.getString("end_YN").charAt(0));
			}

		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			JDBCTemplate.close(rset);
			JDBCTemplate.close(pstmt);
		}

		return m;

	}

}



JDBCTemplate.java

package kr.or.test.common;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class JDBCTemplate {

	// getConnection
	public static Connection getConnection() {

		Connection conn = null;

		try {
			Class.forName("oracle.jdbc.driver.OracleDriver");

			conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe", "jsp", "jsp");

			conn.setAutoCommit(false);

		} catch (ClassNotFoundException e) {

			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return conn;
	}

	// commit
	public static void commit(Connection conn) {
		try {
			conn.commit();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	// rollback
	public static void rollback(Connection conn) {
		try {
			conn.rollback();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	

	// close(Statement)
	public static void close(Statement stmt) {
		try {
			stmt.close();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	// close(ResultSet)
	public static void close(ResultSet rset) {
		try {
			rset.close();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	// close(Connection)
	public static void close(Connection conn) {
		try {
			conn.close();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

}



Member.java

package kr.or.test.member.model.vo;

import java.sql.Date;

public class Member {
	private String userId;
	private String userPwd;
	private String userName;
	private int age;
	private String email;
	private String phone;
	private String address;
	private char gender;
	private String hobby;
	private Date enrollDate;
	private char endYN;

	public Member() {
		super();
		// TODO Auto-generated constructor stub
	}

	public Member(String userId, String userPwd, String userName, int age, String email, String phone, String address,
			char gender, String hobby, Date enrollDate, char endYN) {
		super();
		this.userId = userId;
		this.userPwd = userPwd;
		this.userName = userName;
		this.age = age;
		this.email = email;
		this.phone = phone;
		this.address = address;
		this.gender = gender;
		this.hobby = hobby;
		this.enrollDate = enrollDate;
		this.endYN = endYN;
	}
	
	
	//  회원 가입시에 필요한 데이터만 저장하기 위한 생성자
	public Member(String userId, String userPwd, String userName, int age, String email, String phone, String address,
			char gender, String hobby) {
		super();
		this.userId = userId;
		this.userPwd = userPwd;
		this.userName = userName;
		this.age = age;
		this.email = email;
		this.phone = phone;
		this.address = address;
		this.gender = gender;
		this.hobby = hobby;
	}

	public String getUserId() {
		return userId;
	}

	public void setUserId(String userId) {
		this.userId = userId;
	}

	public String getUserPwd() {
		return userPwd;
	}

	public void setUserPwd(String userPwd) {
		this.userPwd = userPwd;
	}

	public String getUserName() {
		return userName;
	}

	public void setUserName(String userName) {
		this.userName = userName;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	public String getPhone() {
		return phone;
	}

	public void setPhone(String phone) {
		this.phone = phone;
	}

	public String getAddress() {
		return address;
	}

	public void setAddress(String address) {
		this.address = address;
	}

	public char getGender() {
		return gender;
	}

	public void setGender(char gender) {
		this.gender = gender;
	}

	public String getHobby() {
		return hobby;
	}

	public void setHobby(String hobby) {
		this.hobby = hobby;
	}

	public Date getEnrollDate() {
		return enrollDate;
	}

	public void setEnrollDate(Date enrollDate) {
		this.enrollDate = enrollDate;
	}

	public char getEndYN() {
		return endYN;
	}

	public void setEndYN(char endYN) {
		this.endYN = endYN;
	}

}
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김승현
개발자로 매일 한 걸음
이전 포스트

[Servlet&JSP] Chap 6-1. 내장 객체 & Cookie 와 Session

다음 포스트

[Servlet&JSP] Chap 6-3. JSP 이용 회원 CRUD 구현하기(회원가입)

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