snaker-core/src/main/java/org/snaker/engine/core/SnakerEngineImpl.java
protected void setDBAccess(DBAccess access) {
		List<AccessService> services = ServiceContext.findList(AccessService.class);
		for(AccessService service : services) {
			service.setAccess(access);
		}
	}
protected void setDBAccess(DBAccess access) {
		List<AccessService> services = ServiceContext.findList(AccessService.class);
		for(AccessService service : services) {
			service.setAccess(access);
		}
	}
注入dbAccess
@param access db访问对象