<!--aop-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>

2）自定義注解LogAnnotation

java

/**
 * 日志注解
 * METHOD 方法上 type 類上
 */
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface LogAnnotation {

    /**
     * 模塊
     */
    String module() default "";

    /**
     * 簡單描述接口的作用
     */
    String operation() default "";
}

3）定義切面

簡單分析一下切面實現(xiàn)的功能：

java

/**
 * @author : look-word
 * 2022-07-27 16:03
 **/
@Slf4j
@Aspect
@Component
public class LogAspect {

    /**
     * 切入點
     */
    @Pointcut("@annotation(look.word.reggie.common.aop.LogAnnotation)")
    public void logPointCut() {
    }

    /**
     * 環(huán)繞通知
     *
     * @param point 連接點
     */
    @Around("logPointCut()")
    public Object around(ProceedingJoinPoint point) throws Throwable {
        long beginTime = System.currentTimeMillis();
        //執(zhí)行方法
        Object result = point.proceed();
        //執(zhí)行時長(毫秒)
        long time = System.currentTimeMillis() - beginTime;
        //保存日志
        recordLog(point, time);
        return result;
    }

    private void recordLog(ProceedingJoinPoint joinPoint, long time) {
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        // 獲取當前方法
        Method method = signature.getMethod();
        LogAnnotation logAnnotation = method.getAnnotation(LogAnnotation.class);
        log.info("=====================log start================================");
        log.info("module:{}", logAnnotation.module());
        log.info("operation:{}", logAnnotation.operation());

        //請求的方法名
        String className = joinPoint.getTarget().getClass().getName();
        String methodName = signature.getName();
        log.info("request method:{}", className + "." + methodName + "()");

        //請求的參數(shù)
        Object[] args = joinPoint.getArgs();
        Stream<?> stream = ArrayUtils.isEmpty(args) ? Stream.empty() : Arrays.stream(args);
        List<Object> logArgs =
                stream.filter(arg -> (!(arg instanceof HttpServletRequest) && !(arg instanceof HttpServletResponse))).collect(Collectors.toList());
        String params = JSON.toJSONString(logArgs);
        log.info("params:{}", params);

        //獲取request 設(shè)置IP地址
        HttpServletRequest request = HttpContextUtils.getHttpServletRequest();
        log.info("ip:{}", IpUtils.getIpAddr(request));
        
        log.info("execute time : {} ms", time);
        log.info("=====================log end================================");
    }
}

1.3 功能測試

在接口上添加注解即可，還有描述信息

2 過濾器的方式

這種方式簡單點但是可配置性不高

注意：一定得掃描到spring容器中

創(chuàng)建一個類實現(xiàn) filter接口

init:該方法是對filter對象進行初始化的方法，僅在容器初始化filter對象結(jié)束后被調(diào)用一次，參數(shù)FilterConfig可以獲得filter的初始化參數(shù)；
doFilter:可以對request和response進行<u>預(yù)處理</u>。其中FilterChain可以將處理后的request和response對象傳遞到過濾鏈上的下一個資源。
destroy():該方法在容器銷毀對象前被調(diào)用。

java

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;

@Component
public class LogFilter implements Filter {

    private static final Logger LOG = LoggerFactory.getLogger(LogFilter.class);

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        // 打印請求信息
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        LOG.info("------------- LogFilter 開始 -------------");
        LOG.info("請求地址: {} {}", request.getRequestURL().toString(), request.getMethod());
        LOG.info("遠程地址: {}", request.getRemoteAddr());

        long startTime = System.currentTimeMillis();
        filterChain.doFilter(servletRequest, servletResponse);
        LOG.info("------------- LogFilter 結(jié)束 耗時：{} ms -------------", System.currentTimeMillis() - startTime);
    }
}

結(jié)果

總結(jié)

1.過濾器用來實現(xiàn)通用的功能，減少代碼冗余，提高可維護性；

2.一個過濾器可以配置給多個資源使用（編碼過濾器）；

3.一個資源也可以配置多個過濾器，按照配置順序調(diào)用。

3 攔截器的方式

如果不懂請先看了介紹再來

攔截器的介紹

話不說多直接上代碼

創(chuàng)建攔截器

java

/**
 * 攔截器：Spring框架特有的，常用于登錄校驗，權(quán)限校驗，請求日志打印 /login
 * @author : look-word
 * 2022-06-26 13:55
 **/
@Component
public class LogInterceptor implements HandlerInterceptor {
    private static final Logger LOG = LoggerFactory.getLogger(LogInterceptor.class);

        
    @Override
     public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
         // 打印請求信息
         LOG.info("------------- LogInterceptor 開始 -------------");
         LOG.info("請求地址: {} {}", request.getRequestURL().toString(), request.getMethod());
         LOG.info("遠程地址: {}", request.getRemoteAddr());

         long startTime = System.currentTimeMillis();
         request.setAttribute("requestStartTime", startTime);
         return true;
     }

     @Override
     public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
         long startTime = (Long) request.getAttribute("requestStartTime");
         LOG.info("------------- LogInterceptor 結(jié)束 耗時：{} ms -------------", System.currentTimeMillis() - startTime);
     }
}

注冊攔截器

把我們的攔截器注冊到攔截器鏈中

java

/**
 * @author : look-word
 * 2022-06-26 14:03
 **/
@Configuration
public class SpringMvcConfig implements WebMvcConfigurer {

    @Resource
    private LogInterceptor logInterceptor;
    /**
     * 注冊攔截器
     * @param registry
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry
                .addInterceptor(logInterceptor)
                .addPathPatterns("/**")// 對那些接口攔截
                .excludePathPatterns("/login");// 對哪些接機口放行
        WebMvcConfigurer.super.addInterceptors(registry);
    }
}

測試結(jié)果