springmvc拦截器和过滤器(springmvc拦截器的实现步骤)

package com.jt.provider.interceptor;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.time.LocalTime;

public class TimeInterceptor implements HandlerInterceptor {
    
    @Override
    public boolean preHandle(HttpServletRequest request,
                             HttpServletResponse response,
                             Object handler) throws Exception {
        System.out.println("==preHandle==");
        LocalTime now = LocalTime.now();
        int hour = now.getHour();
        if(hour<6||hour>23)
            throw new RuntimeException("请在6~23点之间访问");
        return true;//true表示放行
    }

}

package com.jt;

import com.jt.provider.interceptor.TimeInterceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
public class SpringWebConfig implements WebMvcConfigurer {
    
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new TimeInterceptor())//注册拦截器
                //定义要拦截的请求
                .addPathPatterns("/provider/sentinel01");
    }
}