java - 如何将选项键和值作为对象从 jsp 传递到 Struts 2 动作类？

Question

我有一个场景，我想SelectOption在更改 struts jQuery 下拉列表时将对象发送到动作类，但似乎不可能。

是否有任何解决方法或任何方法来完成这项工作？

JSP代码：

<sj:select href = "%{fetchCountry}" 
             id = "country" 
 onChangeTopics = "reloadsecondlist" 
           name = "country" 
          value = "%{country}"
           list = "countryList" 
        listKey = "key" 
      listValue = "value" 
    emptyOption = "false"
      headerKey = "-1" 
    headerValue = "Please Select a Country" />

注意： DropDown 由SelectOption对象列表组成。

更新：

<s:url id="fetchState" action="json" method="fetchState" namespace="/"/>

<sj:select href = "%{fetchState}" 
             id = "stateID" 
        formIds = "formSelectReload"
   reloadTopics = "reloadsecondlist" 
           name = "state" 
          value = "%{state}" 
           list = "stateMap" 
        listKey = "key" 
      listValue = "value" 
    emptyOption = "false" 
      headerKey = "-1" 
    headerValue = "Please Select a State" />