SpringBoot第二章拦截器

1、创建拦截器，返回true表示通过，返回false表示失败，用于身份认证、权限登录、注解判断等

public class MyInterceptor  implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
         System.out.println("进去方法之前，判断是否满足注解");
        return HandlerInterceptor.super.preHandle(request, response, handler);
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("进入方法之后，返回值");
        HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
    }
}

2、配置注册拦截器，一定要写@Configuration，否则无法自动注册

@Configuration
public class InterceptorConfig  implements  WebMvcConfigurer  {

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //注册TestInterceptor拦截器
        InterceptorRegistration registration = registry.addInterceptor(new MyInterceptor());
        registration.addPathPatterns("/**");                      //所有路径都被拦截
        registration.excludePathPatterns(                         //添加不拦截路径
                "你的登陆路径",            //登录
                "/**/*.html",            //html静态资源
                "/**/*.js",              //js静态资源
                "/**/*.css",             //css静态资源
                "/**/*.woff",
                "/**/*.ttf"
        );
    }
}