struts实现下拉框多级联动

以下方法是通过提交到服务器的方法，页面需要刷新

页面代码：
<script language="JavaScript">
<!---->
</script>
<html:html lang="true">
</html:html>

<jsp:usebean id="listProvice" type="java.util.List" scope="request"></jsp:usebean>
<jsp:usebean id="listCity" type="java.util.List" scope="request"></jsp:usebean>
<html:form action="/myInfo.do?method=edit">
所在地区： <html:select property="provinceId" onchange="getCity(this)">
<logic:iterate id="listprovice" name="listProvice">
<html:option value="${listprovice.provinceId}">
<bean:write name="listprovice" property="provinceName"></bean:write>
</html:option>
</logic:iterate>
</html:select> 省
<html:select property="cityId">
<logic:iterate id="listcity" name="listCity">
<html:option value="${listcity.cityId}">
<bean:write name="listcity" property="cityName"></bean:write>
</html:option>
</logic:iterate>
</html:select> 市
<html:submit value="提交"> </html:submit> <html:reset value="重填"> </html:reset>
</html:form>

Action代码：
public class MyInfoAction extends DispatchAction
{

//这是从别的页面连接到修改页面的方法，在别的页面中加入连接： <html:link page="/myInfo.do?method=toInfo"> 个人信息 </html:link>

public ActionForward toInfo(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
UserForm userForm = (UserForm)request.getSession().getAttribute("userForm");
userForm.setStrUserBirsday(userForm.getUserBirsday().toLocaleString());
userForm.setDepartmentId(userForm.getDepartment().getDepartmentId());
userForm.setCityId(userForm.getCity().getCityId());
userForm.setIndustryId(userForm.getIndustry().getIndustryId());
userForm.setDutyId(userForm.getDuty().getDutyId());
userForm.setProvinceId(userForm.getProvince().getProvinceId());
userForm.setXueliId(userForm.getXueli().getXueliId());

List listIndustry = IndustryBE.queryAllIndustry();
List listXueli = XueliBE.queryAllXueli();
List listDuty = DutyBE.queryAllDuty();
List listProvice = ProviceBE.queryAllProvice();
List listCity = CityBE.queryAllCityByProvinceId(userForm.getProvince().getProvinceId());
request.setAttribute("listCity", listCity);
request.setAttribute("listProvice", listProvice);
request.setAttribute("listDuty", listDuty);
request.setAttribute("listXueli", listXueli);
request.setAttribute("listIndustry", listIndustry);
request.setAttribute("userForm", userForm);
return mapping.findForward("toInfo");
}

//这是处理修改页面当省选择改变时执行的代码，页面中连接在javascript中，见上面的页面代码
public ActionForward changeProvince(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
String provinceId = request.getParameter("provinceId");
UserForm userForm = (UserForm)form;

List listIndustry = IndustryBE.queryAllIndustry();
List listXueli = XueliBE.queryAllXueli();
List listDuty = DutyBE.queryAllDuty();
List listProvice = ProviceBE.queryAllProvice();
List listCity = CityBE.queryAllCityByProvinceId(userForm.getProvinceId());
request.setAttribute("listCity", listCity);
request.setAttribute("listProvice", listProvice);
request.setAttribute("listDuty", listDuty);
request.setAttribute("listXueli", listXueli);
request.setAttribute("listIndustry", listIndustry);
request.setAttribute("userForm", userForm);
return mapping.findForward("changeProvince");
}
}

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