SpringBoot中Inteceptor的使用方式_springboot连接inceptor-优快云博客

本文链接：https://blog.youkuaiyun.com/mrhs_dhls/article/details/107706364

本文详细介绍了如何在SpringBoot项目中使用自定义拦截器AdminInterceptor实现用户登录状态的检查。通过实现HandlerInterceptor接口，该拦截器可在指定路径前验证用户是否已登录，未登录则重定向到登录页面。同时，通过配置InterceptConfig类，可以灵活设置拦截和放行的路径，确保只有已登录的管理员才能访问敏感资源。

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1.在springboot工程基础上创建AdminInterceptor实现HandlerInterceptor

//用户登录就放行
public class AdminInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,     Object handler) throws Exception {
        Admin admin = (Admin) request.getSession().getAttribute(Constant.LOGIN_ADMIN);
        if (null==admin){
            response.sendRedirect(request.getContextPath()+"/admin/go/login");
            return false;
        }
        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 {

    }
}

2.在config包下定义InterceptConfig类实现WebMvcConfigurer

//拦截器的配置类
@Configuration
public class InterceptConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //要拦截的路径
        String[] addInterceptorPaths = {
            "/**"
        };
        
        //要放行的路径
        String[] exceptInterceptorPaths = {
            "/bootstrap/**",
            "/test/**",
            "/images/**",
            "/admin/go/login",
            "/admin/login",
            "/admin/go/error",
        };
        registry.addInterceptor(new     AdminInterceptor()).addPathPatterns(addInterceptorPaths).excludePathPatterns(exc    eptInterceptorPaths);
    }
}