@Aspect
public class LogAspect {

	private final Logger logger = LoggerFactory.getLogger(this.getClass());

	private String requestPath = null ; // 请求地址
	private Map<?,?> inputParamMap = null ; // 传入参数
	private Map<String, Object> outputParamMap = null; // 存放输出结果
	private long startTimeMillis = 0; // 开始时间
	private long endTimeMillis = 0; // 结束时间
	private String requestMethod;
	private String jsonParams;

	/**
	 *
	 * @Title：doBeforeInServiceLayer
	 * @Description: 方法调用前触发
	 * @param joinPoint
	 */
	@Before("execution(* com.xxx.controller..*.*(..))")
	public void doBeforeInServiceLayer(JoinPoint joinPoint) {
		RequestAttributes ra = RequestContextHolder.getRequestAttributes();
		ServletRequestAttributes sra = (ServletRequestAttributes)ra;
		HttpServletRequest request = sra.getRequest();
		// 获取输入参数
		inputParamMap = request.getParameterMap();
		// 获取请求地址
		requestPath = request.getRequestURI();
		requestMethod = request.getMethod();
		jsonParams = "";
		if (requestMethod.equals("POST") || requestMethod.equals("PUT") || requestMethod.equals("DELETE")) {
			jsonParams = JSONObject.toJSONString(joinPoint.getArgs());
		}
		startTimeMillis = System.currentTimeMillis(); // 记录方法开始执行的时间
	}

	/**
	 *
	 * @Title：doAfterInServiceLayer
	 * @Description: 方法调用后触发
	 * @param joinPoint
	 */
	@After("execution(* com.xxx.controller..*.*(..))")
	public void doAfterInServiceLayer(JoinPoint joinPoint) {
		endTimeMillis = System.currentTimeMillis(); // 记录方法执行完成的时间
		this.printOptLog();
	}

	/**
	 *
	 * @Title：doAround
	 * @Description: 环绕触发
	 * @return
	 * @throws Throwable
	 */
	@Around("execution(* com.xxx.controller..*.*(..))")
	public Object doAround(ProceedingJoinPoint pjp) throws Throwable {
		try {
			// 执行完方法的返回值：调用proceed()方法，就会触发切入点方法执行
			outputParamMap = new HashMap<String, Object>();
			Object result = pjp.proceed();// result的值就是被拦截方法的返回值
			outputParamMap.put("result", result);

			return result;
		} catch(BusinessException e) {
			Result result = Result.fail().setErrCodeAndMsg(e.getCode(), e.getMessage());
			outputParamMap.put("result", result);
			return result;
		} catch (Exception e) {
			logger.error(e.toString(), e);
		}
		return pjp.proceed();
	}

	/**
	 * @Title：printOptLog
	 * @Description: 输出日志
	 */
	private void printOptLog() {
		Gson gson = new Gson();
		StringBuilder sb = new StringBuilder();
		if (StringUtils.isNotEmpty(jsonParams) && jsonParams.length() > 500) {
			jsonParams = jsonParams.substring(0, 500) + "...";
		}
		String result = gson.toJson(outputParamMap);
		if (result.length() > 500) {
			result = result.substring(0, 500) + "...";
		}
		sb.append("\n");
	    sb.append("Method    : ").append(requestMethod).append("\n");
	    sb.append("JSONParams: ").append(jsonParams).append("\n");
	    sb.append("Params    : ").append(gson.toJson(inputParamMap)).append("\n");
	    sb.append("URI       : ").append(requestPath).append("\n");
	    sb.append("Time      : ").append((endTimeMillis - startTimeMillis) + "ms").append("\n");
	    sb.append("Result    : ").append(result);

		logger.info(sb.toString());
	}
}