springboot 自定义Interceptor

当我们想要在springboot中自定义一个Intercepter拦截器来拦截某些请求。

1.定义一个拦截器

package com.mindbook.spring_boot_user_auth.interceptor;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @Author wxb
 * @Datatime 2019/12/15 11:22
 * @Descript 自定义用户登录拦截器
 */
@Component
public class LoginInterceptor implements HandlerInterceptor {

    private static final Logger logger = LoggerFactory.getLogger(LoginInterceptor.class);

        @Override
        public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
            logger.info("---开始进入请求地址拦截---");

            //如果返回值是false，就只执行到此。
            return true;
        }

        @Override
        public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
            logger.info("---处理请求完成后视图渲染之前的处理操作---");
        }

        @Override
        public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
            logger.info("--- 视图渲染之后的操作 ---");
    }
}

2.注册拦截器

package com.mindbook.spring_boot_user_auth.config;

import com.mindbook.spring_boot_user_auth.interceptor.LoginInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringBootConfiguration;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.config.annotation.InterceptorRegistration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

/**
 * @Author wxb
 * @Datatime 2019/12/15 11:35
 * @Descript
 */
@SpringBootConfiguration
public class WebMvcConfig implements WebMvcConfigurer {

    @Autowired private LoginInterceptor loginInterceptor;

    public void addInterceptors(InterceptorRegistry registry){
        registry.addInterceptor(loginInterceptor).addPathPatterns("/**").excludePathPatterns("/login");
    }


}

这样就会拦截所有的请求，放弃login的请求。