spring boot 使用攔截器
1.建立攔截器類，繼承HandlerInterceptor
2.註冊攔截器，指定攔截規則

spring framework 中的攔截器類需要繼承與HandlerInterceptor,spring boot也是一致的

package com.tons.intercept;

import lombok.extern.slf4j.Slf4j;
import org.springframework.web.servlet.HandlerInterceptor;

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

@Slf4j
public class RecordIntercept implements HandlerInterceptor {

    /*
      request 請求物件
      response 響應物件
      handler 請求處理器，可以強轉成HandlerMethod使用（可獲取處理方法的相關資訊）。
    */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 獲取路由
        String remoteAddr = request.getRemoteAddr();
        // 獲取訪問路徑 http:localhost:80/ 後面的url部分
        String url = request.getRequestURI();
        // 列印
        log.debug("{}訪問了[{}]",remoteAddr,url);
        // 返回true 放行,false不放行
        return true;
    }
}
 

註冊攔截器，指定攔截規則

package com.tons.config;

import com.tons.intercept.PowerIntercept;
import com.tons.intercept.RecordIntercept;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.util.Arrays;
import java.util.List;

/**
 * 配置攔截器
 */
@Configuration
public class InterceptConfig implements WebMvcConfigurer {
    private static final List<String> STATIC_PATH = Arrays.asList("/","/index","/css/**","/js/**","/img/**","/media/**","/vendors/**","/element-ui/**","/temp/**","/public/**","/json/**","/favicon.ico","/error");

    /**
     * 配置攔截器
     * @param registry 攔截器
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        WebMvcConfigurer.super.addInterceptors(registry);
        //addPathPatterns 攔截路徑
        //excludePathPatterns 不攔截路徑
        // /**代表當前目錄下所有資源(包含其內部子資源)
        registry.addInterceptor(new RecordIntercept()).addPathPatterns("/**").excludePathPatterns(STATIC_PATH);
    }
}