使用Spring AOP做一个日志切面类

日志切面类用于记录Controller层的方法执行前和执行后的日志信息。定义一个切面类，并在该类中声明增强方法（如@Before、@After、@Around等注解的方法），然后在这些增强方法中通过JoinPoint参数获取当前连接点的信息，如方法名、参数、目标对象等。最后，在配置文件中声明切面和切点，将增强方法与切点关联起来，实现切面逻辑的插入。

package com.venux.train.common.aspect;

import cn.hutool.core.util.RandomUtil;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.support.spring.PropertyPreFilters;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
import jakarta.servlet.http.HttpServletRequest;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.multipart.MultipartFile;

@Aspect
@Component
public class LogAspect {
    public LogAspect() {
        System.out.println("Common LogAspect");
    }

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

    /**
     * 定义一个切点
     */
    @Pointcut("execution(public * com.venux..*Controller.*(..))")
    public void controllerPointcut() {
    }

    @Before("controllerPointcut()")
    public void doBefore(JoinPoint joinPoint) {


        // 开始打印请求日志
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();
        Signature signature = joinPoint.getSignature();
        String name = signature.getName();

        // 打印请求信息
        LOG.info("------------- 开始 -------------");
        LOG.info("请求地址: {} {}", request.getRequestURL().toString(), request.getMethod());
        LOG.info("类名方法: {}.{}", signature.getDeclaringTypeName(), name);
        LOG.info("远程地址: {}", request.getRemoteAddr());

        // 打印请求参数
        Object[] args = joinPoint.getArgs();
        // LOG.info("请求参数: {}", JSONObject.toJSONString(args));

        // 排除特殊类型的参数，如文件类型
        Object[] arguments = new Object[args.length];
        for (int i = 0; i < args.length; i++) {
            if (args[i] instanceof ServletRequest
                    || args[i] instanceof ServletResponse
                    || args[i] instanceof MultipartFile) {
                continue;
            }
            arguments[i] = args[i];
        }
        // 排除字段，敏感字段或太长的字段不显示：身份证、手机号、邮箱、密码等
        String[] excludeProperties = {};
        PropertyPreFilters filters = new PropertyPreFilters();
        PropertyPreFilters.MySimplePropertyPreFilter excludefilter = filters.addFilter();
        excludefilter.addExcludes(excludeProperties);
        LOG.info("请求参数: {}", JSONObject.toJSONString(arguments, excludefilter));
    }

    @Around("controllerPointcut()")
    public Object doAround(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
        long startTime = System.currentTimeMillis();
        Object result = proceedingJoinPoint.proceed();
        // 排除字段，敏感字段或太长的字段不显示：身份证、手机号、邮箱、密码等
        String[] excludeProperties = {};
        PropertyPreFilters filters = new PropertyPreFilters();
        PropertyPreFilters.MySimplePropertyPreFilter excludefilter = filters.addFilter();
        excludefilter.addExcludes(excludeProperties);
        LOG.info("返回结果: {}", JSONObject.toJSONString(result, excludefilter));
        LOG.info("------------- 结束 耗时：{} ms -------------", System.currentTimeMillis() - startTime);
        return result;
    }

}