Spring boot 自定义拦截器

1.新建一个类实现HandlerInterceptor接口，重写接口的方法

package com.zpark.interceptor;

import com.zpark.tools.Constants;
import com.zpark..tools.utils.EmptyUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@Component
public class CommonInterceptor implements HandlerInterceptor {

    private Logger log = LoggerFactory.getLogger(CommonInterceptor.class);

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
　　　　　log.info("自定义拦截器"); return true;
    }

    @Override
    public void postHandle(HttpServletRequest request,HttpServletResponse response, Object handler,ModelAndView modelAndView) throws Exception {
        if(StringUtils.isNotEmpty(modelAndView)) {
            modelAndView.addObject("resultCode", "100");
        }
    }
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }

}

2.入口类的目录或者兄弟目录下新建一个类继承WebMvcConfigurerAdapter类并重写addInterceptors方法

package com.zpark;

import com.zpark.interceptor.CommonInterceptor;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

/**
 * @author cosmo
 * @Title:
 * @ProjectName 
 * @Description: TODO
 * @date  
 */
@Configuration
public class MySpringBootConfigurerAdapter extends WebMvcConfigurerAdapter {

    @Autowired
    private CommonInterceptor commonInterceptor;

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(commonInterceptor).addPathPatterns("/**");
    }
}

至此，拦截器配置完毕，可以启动下服务看下效果；