省市联动(struts2+ajax+非数据库)

//前台 代码

$.ajax(        {      type:"POST",      url:"${pageContext.request.contextPath}/findCityByProvinceRequest?id="+new Date().getTime(),      data:{"province":province},      success:function(backData,textStatus,ajax){}            }        );<select id="province"><option>选择省份</option><option>广东</option><option>湖南</option></select><select id="city"><option>选择城市</option></select>        <script type="text/javascript">$("#province").change(function(){//删除原城市下拉框中的内容，除第一项外$("#city option:gt(0)").remove();var province = $("#province option:selected").text();if("选择省份" != province){$.ajax({"type":"POST","url":"${pageContext.request.contextPath}/findCityByProvince?time="+new Date().getTime(),"sendData":{"province":province},"success":function(backData,textStatus,ajax){//js对象var city = backData.cityList;//jquery对象var $city = $(city);//each()$city.each(function(){//this表示每个城市var $option = $("<option>" + this + "</option>");$("#city").append( $option );});}});}});</script>        

//后台struts代码public class ProvinceCityAction extends ActionSupport{private String province;//广东public void setProvince(String province) {this.province = province;}public String findCityByProvince() throws Exception {cityList = new ArrayList<String>();if("广东".equals(province)){cityList.add("湛江");cityList.add("汕头");}else if("湖南".equals(province)){cityList.add("邵阳");cityList.add("浏阳");}return "ok";}private List<String> cityList;public List<String> getCityList() {return cityList;}/** * var backData = { *  "cityList":["邵阳","浏阳"] *   } */}        <struts>   <package name="timePackage" extends="json-default" namespace="/">      <global-results>   <result name="ok" type="json"/>   </global-results><!-- 获取服务端时间 -->   <action    name="loadTimeRequest"    class="cn.itcast.javaee.js.time.TimeAction"    method="loadTimeMethod"/><!-- 检查用户名和密码是否存在 -->   <action    name="checkRequest"    class="cn.itcast.javaee.js.register.RegisterAction"    method="checkMethod"/>      <!-- 根据省份查询城市 -->   <action    name="findCityByProvince"    class="cn.itcast.javaee.js.provincecity.ProvinceCityAction"    method="findCityByProvince"/>    </package></struts>