SpringBoot整合Shiro使用记住我登录，session中获取不到用户信息问题解决

一、自定义一个拦截器实现HandlerInterceptor接口：

package com.demengshop.interceptor;

import com.alibaba.dubbo.config.annotation.Reference;
import com.demengshop.service.AdminUserService;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.subject.Subject;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

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

public class RememberInterceptor implements HandlerInterceptor {
    @Reference
    AdminUserService adminUserService;
    
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        Subject subject = SecurityUtils.getSubject();
        if(!subject.isAuthenticated() && subject.isRemembered()){
        	//用户是通过记住我登录的，将用户信息保存到session中
            subject.getSession().setAttribute("admin",subject.getPrincipal());
        }
        return true;
    }

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

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}

二、创建一个Java类实现WebMvcConfigurer接口，然后重写addInterceptors方法：

package com.demengshop.config;

import com.demengshop.interceptor.RememberInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class WebMvcConfig implements WebMvcConfigurer {

    /**
     * 此方法把该拦截器实例化成一个bean,否则在拦截器里无法注入其它bean
     * @return
     */
    @Bean
    public RememberInterceptor rememberInterceptor(){
        return new RememberInterceptor();
    }

    /**
     * 配置拦截器
     * @param registry
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(rememberInterceptor());
    }

    /**
     * 配置默认跳转主页
     * @param registry
     */
    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        registry.addViewController("/").setViewName("adminLogin");
        registry.addViewController("/login").setViewName("adminLogin");
        registry.addViewController("/adminLogin").setViewName("adminLogin");
    }

    /**
     * 配置静态资源
     * @param registry
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/static/**")
                .addResourceLocations("classpath:/static/");
    }


}