springboot（五）整合interceptor

骑猪看日落 2022-05-23 01:17 158阅读 0赞

**过滤器是java实现的，它需要依赖于Servlet容器，而拦截器是SprignMVC实现的一个机制，独立于Servlet容器，而且能实现IOC容器中的各个bean。简单的说：过滤器的urlPattern针对的是所有的请求，而拦截器的urlPattern针对的SpringMVC中的Controller控制器处理的请求，并不会拦截Servlet容器**

一、创建一个自定义拦截器，继承HandlerInterceptor

@Component
    
    public class MyInterceptor implements HandlerInterceptor {
    
        @Override
    
        public booleanpreHandle(HttpServletRequest request, HttpServletResponse response, Objecthandler) {
    
           System.out.println("preHandle"+request.getRequestURL().toString());
    
            return true; //返回false结束当前请求，返回true继续向下执行
    
       }
    
     
    
        @Override
    
        public voidpostHandle(HttpServletRequest request, HttpServletResponse response, Objecthandler, ModelAndView modelAndView) {
    
           System.out.println("postHandle");
    
     
    
        }
    
     
    
        @Override
    
        public voidafterCompletion(HttpServletRequest request, HttpServletResponse response,Object handler, Exception ex) {
    
           System.out.println("afterCompletion");
    
        }
    
    }

二、创建一个配置类，继承WebMvcConfigurer，重写addInterceptors 添加配置拦截器和拦截url

@Configuration
    
    public class MyWebMvnAdapter implements WebMvcConfigurer {//WebMvcConfigurerAdapter已经过时
    
     
    
        @Autowired
    
        private MyInterceptormyInterceptor;
    
     
    
        @Override
    
        public voidaddInterceptors(InterceptorRegistry registry) {
    
            registry.addInterceptor(myInterceptor).addPathPatterns("/hello").addPathPatterns("/**");
    
        }
    
    }

三、写一个controller

@RestController
    
    @RequestMapping("hello")
    
    public class HelloController {
    
     
    
        @RequestMapping(value ="world1",method = RequestMethod.GET)
    
        public String helloWorld1(){
    
            return"world1";
    
        }
    
     
    
        @RequestMapping(value ="world2",method = RequestMethod.POST)
    
        public String helloWorld2(){
    
            return"world2";
    
        }
    
    }