简单session实现

简单的session校验实现

利用拦截器实现

package com.ryh.blog.intecepter;

import org.springframework.core.Ordered;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

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

/**

• @author RYH

• @description 拦截器用来检查session

• @date 2020/7/7 0007
  **/
  @Component
  public class SessionHandler implements HandlerInterceptor, WebMvcConfigurer, Ordered {

  @Override
  public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
  HttpSession session = request.getSession(false);
  if (session == null) {
  String path = request.getContextPath();
  response.sendRedirect(path + "/login");
  }
  return true;
  }

  @Override
  public void addInterceptors(InterceptorRegistry registry) {
  registry.addInterceptor(new SessionHandler())
  .addPathPatterns("/*")
  .excludePathPatterns("/login", "/doLogin");
  }

  @Override
  public int getOrder() {
  return 0;
  }
  }