java - Struts Jquery Select 标记有时无法获取数据。()

Question

我用

<sj:select />

有时它会获取数据。有时它不会，那么我需要刷新页面以填充选择框。请帮我...

用于填充类别

<s:url var="categoryUrl" action="returnTrainings"/>
<sj:select
      href="%{categoryUrl}"
      id="category" cssClass="employeeinput"
      onChangeTopics="reloadsecondlist"
      onAlwaysTopics="reloadsecondlist"
      name="categoryNameForTraining"
      list="distinctCategory"
      headerKey="0"
      headerValue="Select a Category"/>

用于填充训练

<sj:select
    href="%{categoryUrl}"
    id="selectWithReloadTopic" cssClass="employeeinput"
    formIds="TrainList"
    reloadTopics="reloadsecondlist"
    name="traininglist.hcmoTrainingListId" list="selectedtrainingNames"
    listKey="hcmoTrainingListId" 
    listValue="trainingName"
    headerKey="0"
    headerValue="Select a Training"/>