【SpringBoot】解决拦截器注入 Service 为空问题

落日映苍穹つ 2022-05-27 14:11 186阅读 0赞

## 一、自定义拦截器实现 HandlerInterceptor 接口 ##

/** * * Created by zhh on 2018/04/20. */
    public class MyInterceptor implements HandlerInterceptor { 
    
        @Autowired
        private NetworkProxyInfoService networkProxyInfoService;
    
        @Override
        public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)
                throws Exception {
            // TODO Auto-generated method stub
        }
    
        @Override
        public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)
                throws Exception {
            networkProxyInfoService.getAllNetworkProxyInfoByIsValid(GobalConstant.ProxyValid.VALID);
        }
    
        @Override
        public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2) throws Exception {
            // TODO Auto-generated method stub
            return true;
        }
    
    }

## 二、自定义拦截器配置 ##

/** * * Created by zhh on 2018/04/20. */
    @Configuration
    public class MyWebMvcConfig extends WebMvcConfigurerAdapter { 
    
        /** * 将自定义拦截器作为Bean写入配置 * @return */
        @Bean
        public MyInterceptor myInterceptor() {
            return new MyInterceptor();
        }
    
        @Override
        public void addInterceptors(InterceptorRegistry registry) {
            /** * 多个拦截器组成一个拦截器链 * addPathPatterns 用于添加拦截规则 * excludePathPatterns 用户排除拦截 */
            registry.addInterceptor(myInterceptor()).addPathPatterns("/**");
            super.addInterceptors(registry);
        }
    
    }