Spring boot如何配置拦截器

配置拦截器

1 .实现过拦截器,创建拦截器类MyInterceptor 实现HandlerInterceptor接口

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @ClassName MyInterceptor
 * @Description TODO
 * @Author ZGD
 * @Date 2018/11/2913:31
 * @Version 1.0
 **/
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, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("postHandle");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("afterCompletion");
    }
}

2.配置拦截器（通过@Configuration注解，让Springboot自动加载过滤器）

注意：InterceptorConfig必须放到config文件夹类或者Application同目录下

import com.springmybatis.mybat.HandlerInterceptor.MyInterceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
/**
 * @ClassName InterceptorConfig
 * @Description TODO
 * @Author ZGD
 * @Date 2018/11/2913:33
 * @Version 1.0
 **/
@Configuration
public class InterceptorConfig extends WebMvcConfigurerAdapter {
        @Override
        public void addInterceptors(InterceptorRegistry registry) {
            registry.addInterceptor(new MyInterceptor()).addPathPatterns("/**");
            super.addInterceptors(registry);
        }
    }

启动springboot 执行URL