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;
  
  }
  
  }