登录拦截器

登录拦截器

package com.zxf.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import com.zxf.dto.User;
@Component
public class LoginInterceptor implements HandlerInterceptor {

	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
			throws Exception {
		HttpSession session = request.getSession();
		User user = (User) session.getAttribute("user1");
		if(user!=null) {
			return true;
		}else {
			session.setAttribute("error", "亲,先登录");
			response.sendRedirect("/toLogin");
			return false;
		}
		
	}
	
	@Override
	public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
			ModelAndView modelAndView) throws Exception {
		// TODO Auto-generated method stub
		HandlerInterceptor.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
		HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
	}
}

package com.zxf.interceptor;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class MyWebAppConfigurer implements WebMvcConfigurer {

	@Autowired
	private LoginInterceptor login;
	
	@Override
	public void addInterceptors(InterceptorRegistry registry) {
		registry.addInterceptor(login).addPathPatterns("/main/**");
	}

}

注入，进行拦截，跳转页面