인터셉터

// servlet-context

	<!-- 인터셉터 설정
		-LoginInterceptor 클래스를 빈으로 정의한다.
		** 생성한 클래스는 해당 위치에 존재해야합니다. (패키지 구조에 맞는 형태로 ::: 없으면 에러남)
	 -->
	
	<beans:bean id="loginInterceptor"
		class="kr.or.ddit.controller.intercept.loginInterceptor"></beans:bean>
	<interceptors>
		<interceptor>
			<mapping path="/intercept/login"/>
			<beans:ref bean="loginInterceptor"/>
		</interceptor>
	</interceptors>

// LoginController


package kr.or.ddit.controller.intercept;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import kr.or.ddit.vo.crud.CrudMember;

@Controller
@RequestMapping("/intercept")
public class LoginController {
		
		@RequestMapping(value="/login", method = RequestMethod.GET)
		public String loginForm() {
			return "login/loginForm";
		}
		@RequestMapping(value="/login",method=RequestMethod.POST)
		public String login(String userId, String userPw, Model model) {
			CrudMember member = new CrudMember();
			member.setUserId(userId);
			member.setUserPw(userPw);
			member.setUserName("홍길동");
			
			model.addAttribute("user", member);
			return "login/success";
		}
}

//LoginInerceptor


public class LoginInterceptor extends HandlerInterceptorAdapter{
	private static final String USER_INFO = "userInfo";


// 쓰고 alt +Shift + s -> 오버라이드 / 인플리먼트 메소드누르면


@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
			throws Exception {
		// TODO Auto-generated method stub
		return super.preHandle(request, response, handler);
	}

	@Override
	public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
			ModelAndView modelAndView) throws Exception {
		// TODO Auto-generated method stub
		super.postHandle(request, response, handler, modelAndView);
	}

	@Override
	public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
			throws Exception {
		// TODO Auto-generated method stub
		super.afterCompletion(request, response, handler, ex);
	}
	
    
    //이렇게 세개의 메소드 생김