解决SpringAOP切面中around环绕方法出现空指针异常

这两天想给接口加一些出入参的数据入库操作，于是就加了个AOP，但是加了之后所有被拦截的接口返回值都变成了NULL。

下面标红的地方是解决办法，之前我是void，没有返回。

记录下，以便后面再遇到这个问题

 

一、环绕

/**
 * aop拦截，日志打印处理
 */
@Slf4j
@Component
@Aspect
public class RsetAPIEsignAspectj {

    @Autowired
    private ZyEsignApiMsgRecordService zyEsignApiMsgRecordService;

    @Pointcut("execution(* com.zy.esign.api.service.*.*(..))")
    public void resetAPIPointcut() {
    }

    @Around("resetAPIPointcut()")
    public Object around(ProceedingJoinPoint point) throws Throwable {
        try {
            //request
            HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
            //ip地址
            String ipAddr = IPUtil.getIpAddr(request);
            //入参
            String reqJson = methodBefore(point);
            JSONObject reqResult = JSONObject.parseObject(reqJson);
            String source = String.valueOf(reqResult.get("source"));

            //出参
            String resJson = JSONObject.toJSONString(point.proceed());
            JSONObject resResult = JSONObject.parseObject(resJson);
            String retCode = String.valueOf(resResult.get("code"));
            String retMsg = String.valueOf(resResult.get("message"));

            zyEsignApiMsgRecordService.save(String.valueOf(point.getSignature().getName()), ZyEsignApiMsgRecordService.REQ, reqJson, resJson, retCode, retMsg, StringUtils.isNotBlank(source) ? source : "", null, ipAddr);

        } catch (Exception e) {
            log.error("E签宝aop日志记录异常1：", e);
        } finally {
            return point.proceed();
        }
    }

    public String methodBefore(JoinPoint joinPoint) {
        Map<String, Object> paramMap = new HashMap<>();
        Object[] objs = joinPoint.getArgs();
        String[] argNames = ((MethodSignature) joinPoint.getSignature()).getParameterNames(); // 参数名
        for (int i = 0; i < objs.length; i++) {
            if (!(objs[i] instanceof ExtendedServletRequestDataBinder) && !(objs[i] instanceof HttpServletResponseWrapper)) {
                paramMap.put(argNames[i], objs[i]);
            }
        }
        return JSONObject.toJSONString(paramMap);
    }

}

 

 

 

二、方法开始、结束打印日志

 

/**
 * aop拦截，日志打印处理
 */
@Component
@Aspect
public class RsetAPIAspectj {

    protected final Logger logger = LogManager.getLogger(this.getClass());

    @Pointcut("execution(* com.zy.esign.controller.*.*(..))")
    public void resetAPIPointcut() {
    }

    @Before(value = "resetAPIPointcut()")
    public void restAPIBefore(JoinPoint jp) {
        String httpReqParam = null;
        String ip = null;
        HttpServletRequest request = null;
        try {
            StringBuilder sb = new StringBuilder("====调用")
                    .append(jp.getSignature().toString()).append("方法-开始：");
            for (Object obj : jp.getArgs()) {
                if (obj instanceof HttpServletRequest) {
                    request = (HttpServletRequest) obj;
                    ip = "ip:[" + request.getRemoteAddr() + "]";
                    httpReqParam = "httpReqParam:"
                            + JSONObject.toJSONString((request).getParameterMap());
                    sb.append(ip).append(httpReqParam);
                } else if (obj instanceof HttpServletResponse) {
                } else {
                    sb.append(JSONObject.toJSONString(obj));
                }
            }
            logger.info(sb.toString());
        } catch (Exception e) {
        }
    }

    @AfterReturning(pointcut = "resetAPIPointcut()", returning = "returnVal")
    public void restAPIAfter(JoinPoint jp, Object returnVal) {
        try {
            StringBuilder sb = new StringBuilder("====调用")
                    .append(jp.getSignature().toString()).append("方法-结束：");
            sb.append(JSONObject.toJSONString(returnVal));
            logger.info(sb.toString());
        } catch (Exception e) {
        }
    }