用SpringAop实现日志

自定义注解

//注解可以加在什么地方
@Target(value = ElementType.METHOD)
//注解的生命周期
@Retention(value = RetentionPolicy.RUNTIME)
public @interface LogAnnotation {
    String type() default "select";
    String content() default "";
}

在需要生成的方法上添加注解

 @LogAnnotation(type = "select",content = "查询所有品牌")

最后通过aop用注解切入

@Aspect  //这是一个切面
@Configuration  //配置类
public class LogAop {
    @Autowired
    BzLogMapper bzLogMapper;
    @Autowired
    HttpServletRequest request;
　　　
　　//环绕增强

    @Around("@annotation(com.xx.annotation.LogAnnotation)")
    public Object logAround(ProceedingJoinPoint joinPoint){


        BzAdmin user = (BzAdmin)request.getSession().getAttribute("user");
        //username
        String userName = "";
        if (user != null) {
            userName = user.getUsername();
        }
        //ip 通过工具类
        String ip = IPKi.getIpAddrByRequest(request);
        //获取方法签名
        MethodSignature signature =(MethodSignature) joinPoint.getSignature();
        //通过方法签名获取方法对象
        Method method = signature.getMethod();
        //拿到方法名
        String methodName = method.getName();
        //拿到方法上的注解
        LogAnnotation annotation = method.getAnnotation(LogAnnotation.class);
        //通过注解拿到其中的值
        //content
        String content = annotation.content();
        //type
        String type = annotation.type();
        //date
        Date date = new Date();
        //time
        long l = System.currentTimeMillis();
        Object proceed = null;
        try {
             proceed = joinPoint.proceed();
        } catch (Throwable throwable) {
            throwable.printStackTrace();
        }
        long l1 = System.currentTimeMillis();

        long time = l1 - l;

        BzLog bzLog = new BzLog(null,userName,ip,type,content,date,methodName,time);
        bzLogMapper.insert(bzLog);
        return proceed;
    }
}