SpringBoot利用AOP记录系统日志

利用Spring框架中aop,我们可以实现业务代码与系统级服务进行解耦，例如日志记录、事务及其他安全业务等，可以使得我们的工程更加容易维护、优雅。
可以利用注解实现，也可以利用拦截器（继承HandlerInterceptor接口，实现preHandle方法），这里只介绍注解实现方式。

一、添加依赖

<dependency>
    <groupId>org.springframework.bootgroupId>
    <artifactId>spring-boot-starter-aopartifactId>
dependency>

二、自定义注解

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface SysLog {
    String value() default "";
}

三、配置切面

将自定义的注解作为切入点，参数是ProceedingJoinPoint和sysLog，ProceedingJoinPoint用来获取当前执行的方法，syslog用来获取注解里面的值。

@Aspect
@Component
public class SysLogAspect {
    @Autowired
    private SysLogService sysLogService;
    private static Logger logger = LoggerFactory.getLogger(SysLogAspect.class);

    @Around("@annotation(sysLog)")
    public Object around(ProceedingJoinPoint joinPoint,SysLog sysLog) throws Throwable {
        long beginTime = SystemClock.now();
        //执行方法
        Object result = joinPoint.proceed();
        //执行时长(毫秒)
        long time = SystemClock.now() - beginTime;

        SysLog sysLogEntity = new SysLog();
        if(sysLog != null){
            //注解上的描述
            sysLogEntity.setOperation(sysLog.value());
        }

        //请求的方法名
        String className = joinPoint.getTarget().getClass().getName();
        String methodName = joinPoint.getSignature().getName();
        sysLogEntity.setMethod(className + "." + methodName + "()");

        //请求的参数
        Object[] args = joinPoint.getArgs();
        String params = Json.toJsonString(args[0]);
        sysLogEntity.setParams(params);

        //设置IP地址
        sysLogEntity.setIp(IPHelper.getIpAddr());
        //用户名
        String username = SecurityUtils.getSysUser().getUsername();
        sysLogEntity.setUsername(username);
        sysLogEntity.setTime(time);
        sysLogEntity.setCreateDate(new Date());
        //保存系统日志
        sysLogService.save(sysLogEntity);
        return result;
    }
}

另一种方式切面

@Slf4j
@Aspect
@Component
//@Profile({"dev"}) //只对某个环境打印日志
public class LogAspect {

    private static final String LINE_SEPARATOR = System.lineSeparator();

    /**
     * 以自定义 @PrintlnLog 注解作为切面入口
     */
    @Pointcut("@annotation(com.zhangsan.unifiedlog.config.PrintlnLog)")
    public void PrintlnLog() {
    }

    /**
     * @param joinPoint
     * @description 切面方法入参日志打印
     */
    @Before("PrintlnLog()")
    public void doBefore(JoinPoint joinPoint) throws Throwable {

        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();

        String methodDetailDescription = this.getAspectMethodLogDescJP(joinPoint);

        log.info("------------------------------- start --------------------------");
        /**
         * 打印自定义方法描述
         */
        log.info("Method detail Description: {}", methodDetailDescription);
        /**
         * 打印请求入参
         */
        log.info("Request Args: {}", JSON.toJSONString(joinPoint.getArgs()));
        /**
         * 打印请求方式
         */
        log.info("Request method: {}", request.getMethod());
        /**
         * 打印请求 url
         */
        log.info("Request URL: {}", request.getRequestURL().toString());

        /**
         * 打印调用方法全路径以及执行方法
         */
        log.info("Request Class and Method: {}.{}", joinPoint.getSignature().getDeclaringTypeName(), joinPoint.getSignature().getName());
    }

    /**
     * @param proceedingJoinPoint
     * @description 切面方法返回结果日志打印
     */
    @Around("PrintlnLog()")
    public Object doAround(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {

        String aspectMethodLogDescPJ = getAspectMethodLogDescPJ(proceedingJoinPoint);

        long startTime = System.currentTimeMillis();

        Object result = proceedingJoinPoint.proceed();
        /**
         * 输出结果
         */
        log.info("{}，Response result  : {}", aspectMethodLogDescPJ, JSON.toJSONString(result));

        /**
         * 方法执行耗时
         */
        log.info("Time Consuming: {} ms", System.currentTimeMillis() - startTime);

        return result;
    }

    /**
     * @description 切面方法执行后执行
     */
    @After("PrintlnLog()")
    public void doAfter(JoinPoint joinPoint) throws Throwable {
        log.info("------------------------------- End --------------------------" + LINE_SEPARATOR);
    }

    /**
     * @param joinPoint
     * @description @PrintlnLog 注解作用的切面方法详细细信息
     */
    public String getAspectMethodLogDescJP(JoinPoint joinPoint) throws Exception {
        String targetName = joinPoint.getTarget().getClass().getName();
        String methodName = joinPoint.getSignature().getName();
        Object[] arguments = joinPoint.getArgs();
        return getAspectMethodLogDesc(targetName, methodName, arguments);
    }

    /**
     * @param proceedingJoinPoint
     * @description @PrintlnLog 注解作用的切面方法详细细信息
     */
    public String getAspectMethodLogDescPJ(ProceedingJoinPoint proceedingJoinPoint) throws Exception {
        String targetName = proceedingJoinPoint.getTarget().getClass().getName();
        String methodName = proceedingJoinPoint.getSignature().getName();
        Object[] arguments = proceedingJoinPoint.getArgs();
        return getAspectMethodLogDesc(targetName, methodName, arguments);
    }

    /**
     * @param targetName
     * @param methodName
     * @param arguments
     * @description 自定义注解参数
     */
    public String getAspectMethodLogDesc(String targetName, String methodName, Object[] arguments) throws Exception {
        Class targetClass = Class.forName(targetName);
        Method[] methods = targetClass.getMethods();
        StringBuilder description = new StringBuilder("");
        for (Method method : methods) {
            if (method.getName().equals(methodName)) {
                Class[] clazzs = method.getParameterTypes();
                if (clazzs.length == arguments.length) {
                    description.append(method.getAnnotation(PrintlnLog.class).description());
                    break;
                }
            }
        }
        return description.toString();
    }
}

四、在需要记录日志的方法上，添加注解

@SysLog(value)

    @SysLog("获取配置信息")
    @GetMapping("/info/{key}")
    @ApiOperation(value = "获取配置信息", notes = "获取配置信息")
    @ApiImplicitParam(name = "key", value = "参数名")
    public ResponseEntity<String> info(@PathVariable("key")String key){
        return ResponseEntity.ok(sysConfigService.getValue(key));
    }

当操作这个方法时，将会被记录到数据库中，在日志管理中能看到相应操作的内容。

参考文章
springboot 之aop实现日志记录
springboot AOP 实现日志管理
spring boot + AOP 实现日志记录
又被逼着优化代码，这次我干掉了出入参 Log日志