spring boot 之登录拦截

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登录拦截，请求的session里面有username者判断为登录状态@Configuration public class WebSecurityConfig  extends WebMvcConfigurerAdapter {     @Bean     public SecurityInterceptor getSecurityInterceptor() {         return new SecurityInterceptor();     }       public void addInterceptors(InterceptorRegistry registry) {         InterceptorRegistration addInterceptor = registry.addInterceptor(getSecurityInterceptor());           addInterceptor.excludePathPatterns("/error");         addInterceptor.excludePathPatterns("/plan/login**");         addInterceptor.addPathPatterns("/web/**");     }       private class SecurityInterceptor extends HandlerInterceptorAdapter {           @Override         public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)                 throws Exception {             HttpSession session = request.getSession();             if (session.getAttribute("username") != null)                 return true;             String url = "/plan/logins";             response.sendRedirect(url);             return false;         }     } }　　使用redis 进行增强。获取的session 去判断在redis里面是否存在，存在可登录成功@Configuration public class WebSecurityConfig  extends WebMvcConfigurerAdapter {     @Autowired     private  RedisTemplate redisTemplate;     private RedisTemplate userredis(RedisTemplate redisTemplate) {         redisTemplate = RedisDbInit.initRedis(RedisConfig.userreidport, redisTemplate);         return redisTemplate;     }     @Bean     public SecurityInterceptor getSecurityInterceptor() {         return new SecurityInterceptor();     }       public void addInterceptors(InterceptorRegistry registry) {         InterceptorRegistration addInterceptor = registry.addInterceptor(getSecurityInterceptor());           addInterceptor.excludePathPatterns("/error");         addInterceptor.excludePathPatterns("/plan/login**");         addInterceptor.addPathPatterns("/web/**");     }       private class SecurityInterceptor extends HandlerInterceptorAdapter {           @Override         public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)                 throws Exception {             String url = "/plan/logins";             HttpSession session = request.getSession();             if (session.getAttribute("username") != null){                 String name= (String) userredis(redisTemplate).opsForValue().get(session.getAttribute("username"));                 if (name==null){                     response.sendRedirect(url);                     return false;                 }else {                     return true;                 }             }             response.sendRedirect(url);             return false;         }     } }