src/main/java/com/mty/cc/interceptor/MtyInterceptor.java

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package com.mty.cc.interceptor;

import com.mty.cc.exception.MtyException;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

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

/**
 * 自定义拦截器
 */
public class MtyInterceptor implements HandlerInterceptor{

    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        boolean flag = true;
        if (request.getSession().getAttribute("username") == null) {
            flag = false;
            throw new MtyException("请退出后重新登录！");
        }
//        response.sendRedirect(request.getContextPath()+"/login.jsp");
        return flag;
    }

    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
    }

    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

    }

}