我在SpringBoot中有此代码
val num = repo.findAll().count()
val pageSize = size.get()
return Mono.just(num / pageSize)
但是编译器在“ /”上显示错误-未解决的参考 当我将代码更改为：
val num = repo.findAll().count() as Long
val pageSize = size.get() as Double
return Mono.just(num / pageSize)
所有编译都很好，但是通过请求有错误：无法将类Reactor.core.publisher.MonoCount强制转换为类java.lang.Long（reactor.core.publisher.MonoCount在加载程序“ app”的未命名模块中； java .lang.Long在加载程序“ bootstrap”的模块java.base中）
答案 0 :(得分：3)
<select _ngcontent-why-c1="" class="form-control bs-select-hidden" id="selectbedroom" title="Bedrooms">
<option _ngcontent-why-c1="" class="bs-title-option" value="" ng-reflect- value="">Select Bedroom</option><!--bindings={
"ng-reflect-ng-for-of": "0,1,2,3,4,5,6,7,8,9"
}-->
<option _ngcontent-why-c1="" value="1" ng-reflect-value="1">Studio Apt</option>
<option _ngcontent-why-c1="" value="2" ng-reflect-value="2">1 BHK</option>
<option _ngcontent-why-c1="" value="3" ng-reflect-value="3">2 BHK</option>
<option _ngcontent-why-c1="" value="4" ng-reflect-value="4">3 BHK</option>
<option _ngcontent-why-c1="" value="5" ng-reflect-value="5">4 BHK</option>
<option _ngcontent-why-c1="" value="6" ng-reflect-value="6">5 BHK</option>
<option _ngcontent-why-c1="" value="7" ng-reflect-value="7">6 BHK</option>
<option _ngcontent-why-c1="" value="8" ng-reflect-value="8">7 BHK</option>
<option _ngcontent-why-c1="" value="9" ng-reflect-value="9">8 BHK</option>
<option _ngcontent-why-c1="" value="10" ng-reflect-value="10">9 BHK</option>
</select>
<div class="btn-group bootstrap-select form-control open">
<button type="button" class="btn dropdown-toggle btn-default" data-toggle="dropdown" data-id="selectbedroom" title="Select Bedroom" aria-expanded="true">
<span class="filter-option pull-left">Select Bedroom</span> <span class="caret">
</span>
</button>
<div class="dropdown-backdrop"></div>
<div class="dropdown-menu open" style="max-height: 139.917px; overflow: hidden; min-height: 0px;">
<ul class="dropdown-menu inner" role="menu" style="max-height: 137.917px; overflow-y: auto; min-height: 0px;">
</ul>
</div>
</div>
计数实际上不是num，而是扩展了Long的{{1}}。
因此，您只需要直接映射数据：
reactor.core.publisher.MonoCount