建個springboot專案，目錄結構如下

MyInterceptor實現HandlerInterceptor介面

可根據需要實現三個方法中的一個或多個

public class MyInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request,HttpServletResponse response,Object handler) throws Exception {
        System.out.println("preHandle"
 
);
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request,Object handler,ModelAndView modelAndView) throws Exception {
        System.out.println("postHandle");
    }

    @Override
    public void afterCompletion(HttpServletRequest request,Exception ex) throws Exception {
        System.out.println("afterCompletion"
 
);
    }
}
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controller測試程式碼

@RestController
public class TestController {
    @GetMapping(value = "/hello")
    public String hello() {

        System.out.println("hello controller");
        return "hello world";
    }

    @GetMapping(value = "/test")
    public String test()
    {
        System.out.println("test controller"
 
);
        return "this is test";
    }

}

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配置檔案MyConfig實現WebMvcConfigurer介面

實現介面方法addInterceptors，registry.addInterceptor是新增一個攔截器，addPathPatterns()是新增要攔截的路徑，excludePathPatterns是新增不攔截的路徑

@Configuration
public class MyConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
//        新增攔截器
        InterceptorRegistration interceptorRegistration = registry.addInterceptor(new MyInterceptor());
//
        interceptorRegistration.addPathPatterns("/**")
                               .excludePathPatterns("/test");
    }
}
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測試

瀏覽器訪問 http://localhost:8080/hello ，控制檯輸出

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