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  • Spring Boot-定义拦截器(七)

     在web项目 我们常常使用拦截器做权限验证和登陆验证 

    1.创建一个拦截器实现类 标注@Componet

    @Component
    public class LoginInterceputer implements HandlerInterceptor {
        /**
         * 进入controller层之前拦截请求
         * @param httpServletRequest
         * @param httpServletResponse
         * @param o 为函数对象
         * @return
         * @throws Exception
         */
        @Override
        public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
    
            System.out.println(o);
            System.out.println("进入controller之前拦截");
            return true;
        }
    
        @Override
        public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
            System.out.println("--------------处理请求完成后视图渲染之前的处理操作---------------");
        }
    
        @Override
        public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
            System.out.println("---------------视图渲染之后的操作-------------------------0");
        }
    
    }

    2.通过javaconfig的方式进行拦截器配置

    @Configuration
    public class WebConfig implements WebMvcConfigurer {
        @Autowired
        LoginInterceputer loginInterceputer;
        @Override
        public void addInterceptors(InterceptorRegistry registry) {
            // 自定义拦截器,添加拦截路径和排除拦截路径
            registry.addInterceptor(loginInterceputer).addPathPatterns(new String[]{"/**"}).excludePathPatterns(new String[]{"/login"});
        }
    }

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  • 原文地址:https://www.cnblogs.com/LQBlog/p/9244284.html
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