spring boot使用aop记录每一次的请求

在最近写一个课程项目的时候，有一个需求，要求是记录每一次请求的方法名，ip，请求参数等信息，我想到了利用AOP来获取请求日志。

1. 首先创建一个maven工程，导入相关依赖

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

2. 实现日志打印的代码

    @Aspect     //把当前类标识为一个切面供容器读取
    @Component  //注入到ICO容器中
    public class LogAspect {
        private final Logger logger = LoggerFactory.getLogger(this.getClass());
   
        //切入点，用于匹配方法执行的切入点。切入点是com.heiye.web包下的所有请求
        @Pointcut("execution(* com.heiye.web.*.*(..))")
        //Point签名
        public void log() {}
   
   
        @Before("log()")    //前置增强
        public void doBefore(JoinPoint joinPoint) {
            //获取request请求
            ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
            HttpServletRequest request = attributes.getRequest();
            //通过请求获取url,ip
            String url = request.getRequestURL().toString();
            String ip = request.getRemoteAddr();
            //获取方法所在的包名和类名
            String classMethod = joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName();
            //获取请求的参数
            Object[] args = joinPoint.getArgs();
            RequestLog requestLog = new RequestLog(url, ip, classMethod, args);
            logger.info("Request : {}", requestLog);
        }
   
        @After("log()")     //标识为一个后置增强方法，不管程序会不会抛出异常都会执行。
                public void doAfter() {
        }
   
        //后置增强，在方法正常退出的时候执行
        @AfterReturning(returning = "result",pointcut = "log()")
        public void doAfterRuturn(Object result) {
            logger.info("Result : {}", result);
        }
   
        //请求记录参数实体类
        private class RequestLog {
            private String url;         //请求的url
            private String ip;          //请求ip
            private String classMethod; //请求方法
            private Object[] args;      //请求参数
   
            public RequestLog(String url, String ip, String classMethod, Object[] args) {
                this.url = url;
                this.ip = ip;
                this.classMethod = classMethod;
                this.args = args;
            }
   
            @Override
            public String toString() {
                return "{" +
                        "url='" + url + '\'' +
                        ", ip='" + ip + '\'' +
                        ", classMethod='" + classMethod + '\'' +
                        ", args=" + Arrays.toString(args) +
                        '}';
            }
        }
   
    }