spring aop配置

<aop:aspect id="dtoParamCheckAspect" ref="dtoParamCheckInterceptor">
    <aop:pointcut id="dtoParamCheckPoint" expression="execution(* com.mogujie.service.mogu.server.facade..*.*(..))"/>
    <aop:around method="process" pointcut-ref="dtoParamCheckPoint"/>
</aop:aspect>

拦截器

public class DtoParamCheckInterceptor {

    /**
     * 处理dto 参数校验类
     * @param pjp
     * @return
     * @throws Throwable
     */
    public Object process(ProceedingJoinPoint pjp) throws Throwable {
        MethodSignature signature = (MethodSignature) pjp.getSignature();
        Method method = signature.getMethod();
        DtoParamCheck dtoParamCheck = AnnotationUtils.findAnnotation(method, DtoParamCheck.class);
        if(dtoParamCheck == null){
            return pjp.proceed();
        }

        Object[] args = pjp.getArgs();
        int[] needCheckIndexArray = dtoParamCheck.needCheckArgIndexs();
        for(int index: needCheckIndexArray){
            Object arg = args[index];
            Set<ConstraintViolation<Object>> validate = DtoParamCheckValidator.getInstance().validate(arg);
            if(validate.size() > 0){
                StringBuilder sb = new StringBuilder();
                Iterator<ConstraintViolation<Object>> iterator = validate.iterator();
                while (iterator.hasNext()){
                    sb.append(iterator.next().getMessage()).append("; ");
                }
                return new Response(SystemConstantsEnum.PARAM_ERROR.getCode(), sb.toString());
            }
        }
        return pjp.proceed();
    }
}

声明注解

/**
 * 检测dto 参数注解
 * User: beiye
 * Date: 16/3/29.
 */
@Target({METHOD})
@Retention(RUNTIME)
@Documented
public @interface DtoParamCheck {

    /**
     * 需要检查的参数下标
     * @return
     */
    int[] needCheckArgIndexs() default {0};
}

函数使用

@Override
@DtoParamCheck
public Response<Integer>    queryBloggerTotalCount(QueryBloggerListReqDto queryBloggerListReqDto) 

**dto声明

@Data
public class QueryParentUrlReqDto{

    /**
     * 站点id
     */
    @Min(value = 1, message = "cityId 最小值为{value}")
    private Long cityId;

    /**
     * 网站名
     */
    @StrNotBlank(message = "siteName 不能为空字符串")
    private String siteName;

    /**
     * 创建人Id
     */
    @CollectionNotEmpty(message = "creatorIdList 不能为空")
    private List<Long> creatorIdList;

    @Min(value = 1,message = "pageSize 最小值为 {value}")
    private Integer pageSize;

    @Min(value = 1,message = "pageNum 最小值为 {value}")
    private Integer pageNum;
}