깔끔한 로그인

1. 문제

2. 새 도구

3. 코드

-- 1) 스키마 마이그레이션 — 표시용 닉네임 추가
ALTER TABLE mymember ADD COLUMN nick VARCHAR(30) AFTER pwd;

// com.smhrd.domain.Member
@Data @AllArgsConstructor @NoArgsConstructor
public class Member {
    private String id;
    private String pwd;
    private String nick;     // ← 추가
}

// com.smhrd.interceptor.LoginInterceptor
public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest req, HttpServletResponse resp, Object h)
            throws Exception {
        HttpSession session = req.getSession();
        if (session.getAttribute("loginUser") == null) {
            resp.sendRedirect(req.getContextPath() + "/login");
            return false;     // 컨트롤러 호출 안 함
        }
        return true;
    }
}

<!-- servlet-context.xml -->
<interceptors>
    <interceptor>
        <mapping path="/board/write"/>
        <mapping path="/mypage/**"/>
        <beans:bean class="com.smhrd.interceptor.LoginInterceptor"/>
    </interceptor>
</interceptors>

<!-- header.jsp (공통) -->
<c:choose>
    <c:when test="${not empty sessionScope.loginUser}">
        ${sessionScope.loginUser.nick}님 |
        <a href="/logout">로그아웃</a>
    </c:when>
    <c:otherwise>
        <a href="/login">로그인</a>
    </c:otherwise>
</c:choose>

<!-- board/list.jsp -->
<%@ include file="/WEB-INF/views/header.jsp" %>
... 본문 ...

4. 정리

• Interceptor = 컨트롤러 진입 전 가드
• JSP include = 공통 레이아웃
• sessionScope 로 JSP 에서 세션 접근
• v4 — 깔끔한 코드

5. Before / After