spring aop切面（根据自定义注解来执行）

@Aspect
@Component
public class ExpAspect {

private static Logger logger = LoggerFactory.getLogger(ExpAspect.class);

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

@Autowired
private ExpLogAPI expLogAPI;

private ExpLogVO expLogVO = null;

@Pointcut("@annotation(com.sgai.tpl.webapps.op.controller.exportsAspect.ExpLog)")
public void ExpLog(){};
/**
 * 在切点之前织入
 * @param joinPoint
 * @throws Throwable
 */
@Before("ExpLog()")
public void doBefore(JoinPoint joinPoint) throws Throwable {
    ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
    HttpServletRequest request = attributes.getRequest();
    String methodDescription = getAspectLogDescription(joinPoint);
    String acctId = AssertContext.getAcctId();
    expLogVO = new ExpLogVO();
    expLogVO.setUrl(request.getRequestURL().toString());
    expLogVO.setDescription(methodDescription);
    expLogVO.setMethod(joinPoint.getSignature().getDeclaringTypeName()+","+joinPoint.getSignature().getName());
    expLogVO.setIp(request.getRemoteAddr());
    ObjectMapper objectMapper = new ObjectMapper();
    Object obj =  objectMapper.convertValue(joinPoint.getArgs()[0], Object.class);
    expLogVO.setRequest(obj.toString());
    int a = expLogVO.getRequest().indexOf("null");
    while(a!=-1){
        String b = expLogVO.getRequest().substring(0,a+4);
        String str = jq(b);
        expLogVO.setRequest(expLogVO.getRequest().replace(str,""));
        a = expLogVO.getRequest().indexOf("null");
    };
    expLogVO.setCreatedBy(acctId);
    expLogVO.setCreatedDt(new Date());
    expLogVO.setState(1);
    expLogVO.setId(expLogAPI.insert(expLogVO).getRetContent());
}
private static String jq(String str) {
    int max = str.length();
    int a = 0;
    int dh = str.lastIndexOf(",");
    int zk = str.lastIndexOf("[");
    int dk = str.lastIndexOf("{");
    if(dh>zk){
        if(dh>dk){
            a = dh;
        }else{
            a = dk+1;
        }
    }else if(zk>dk){
        a = zk+1;
    }else{
        a = dk+1;
    }
    str = str.substring(a,max);
    return str;
}
/**
 * 在切点之后织入
 * @throws Throwable
 */
@After("ExpLog()")
public void doAfter() throws Throwable {
}

/**
 * 环绕
 * @param proceedingJoinPoint
 * @return
 * @throws Throwable
 */
@Around("ExpLog()")
public Object doAround(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
    long startTime = System.currentTimeMillis();
    Object result = proceedingJoinPoint.proceed();
    ObjectMapper objectMapper = new ObjectMapper();
    JsonResponse<Object> jsonResponse =  objectMapper.convertValue(result, JsonResponse.class);
    ExpLogVO expLogVO1 = new ExpLogVO();
    expLogVO1.setId(expLogVO.getId());
    expLogVO1.setSize(jsonResponse.getRspBody().toString());
    expLogVO1.setTime(String.valueOf(System.currentTimeMillis() - startTime));
    expLogVO1.setUpdateDt(new Date());
    expLogVO1.setState(2);
    expLogAPI.update(expLogVO1);
    return result;
}

/**
 * 获取切面注解的描述
 *
 * @param joinPoint 切点
 * @return 描述信息
 * @throws Exception
 */
public String getAspectLogDescription(JoinPoint joinPoint)
        throws Exception {
    String targetName = joinPoint.getTarget().getClass().getName();
    String methodName = joinPoint.getSignature().getName();
    Object[] arguments = joinPoint.getArgs();
    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(ExpLog.class).description());
                break;
            }
        }
    }
    return description.toString();
}

}