jQuery + jQuery Mobile 实现省市二级下拉列表页面

一、需求：

提供省、市下拉列表，当用户选择省一级下拉列表项后，市下拉列表的各个选项自动变为该省对应的城市列表。

二、效果：

 

三、实现：

1.省市json数据，来自：

http://www.cnblogs.com/jinzhao/archive/2012/04/01/2428142.html

/**
 * 省市json数据
 */
var provinceAndCityArray = [{ name: "北京", cities: ["西城", "东城", "崇文", "宣武", "朝阳", "海淀", "丰台", "石景山", "门头沟", "房山", "通州", "顺义", "大兴", "昌平", "平谷", "怀柔", "密云", "延庆"] },
                       { name: "天津", cities: ["青羊", "河东", "河西", "南开", "河北", "红桥", "塘沽", "汉沽", "大港", "东丽", "西青", "北辰", "津南", "武清", "宝坻", "静海", "宁河", "蓟县", "开发区"] },
                       { name: "河北", cities: ["石家庄", "秦皇岛", "廊坊", "保定", "邯郸", "唐山", "邢台", "衡水", "张家口", "承德", "沧州", "衡水"] },
                       { name: "山西", cities: ["太原", "大同", "长治", "晋中", "阳泉", "朔州", "运城", "临汾"] },
                       { name: "内蒙古", cities: ["呼和浩特", "赤峰", "通辽", "锡林郭勒", "兴安"] },
                       { name: "辽宁", cities: ["大连", "沈阳", "鞍山", "抚顺", "营口", "锦州", "丹东", "朝阳", "辽阳", "阜新", "铁岭", "盘锦", "本溪", "葫芦岛"] },
                       { name: "吉林", cities: ["长春", "吉林", "四平", "辽源", "通化", "延吉", "白城", "辽源", "松原", "临江", "珲春"] },
                       { name: "黑龙江", cities: ["哈尔滨", "齐齐哈尔", "大庆", "牡丹江", "鹤岗", "佳木斯", "绥化"] },
                       { name: "上海", cities: ["浦东", "杨浦", "徐汇", "静安", "卢湾", "黄浦", "普陀", "闸北", "虹口", "长宁", "宝山", "闵行", "嘉定", "金山", "松江", "青浦", "崇明", "奉贤", "南汇"] },
                       { name: "江苏", cities: ["南京", "苏州", "无锡", "常州", "扬州", "徐州", "南通", "镇江", "泰州", "淮安", "连云港", "宿迁", "盐城", "淮阴", "沐阳", "张家港"] },
                       { name: "浙江", cities: ["杭州", "金华", "宁波", "温州", "嘉兴", "绍兴", "丽水", "湖州", "台州", "舟山", "衢州"] },
                       { name: "安徽", cities: ["合肥", "马鞍山", "蚌埠", "黄山", "芜湖", "淮南", "铜陵", "阜阳", "宣城", "安庆"] },
                       { name: "福建", cities: ["福州", "厦门", "泉州", "漳州", "南平", "龙岩", "莆田", "三明", "宁德"] },
                       { name: "江西", cities: ["南昌", "景德镇", "上饶", "萍乡", "九江", "吉安", "宜春", "鹰潭", "新余", "赣州"] },
                       { name: "山东", cities: ["青岛", "济南", "淄博", "烟台", "泰安", "临沂", "日照", "德州", "威海", "东营", "荷泽", "济宁", "潍坊", "枣庄", "聊城"] },
                       { name: "河南", cities: ["郑州", "洛阳", "开封", "平顶山", "濮阳", "安阳", "许昌", "南阳", "信阳", "周口", "新乡", "焦作", "三门峡", "商丘"] },
                       { name: "湖北", cities: ["武汉", "襄樊", "孝感", "十堰", "荆州", "黄石", "宜昌", "黄冈", "恩施", "鄂州", "江汉", "随枣", "荆沙", "咸宁"] },
                       { name: "湖南", cities: ["长沙", "湘潭", "岳阳", "株洲", "怀化", "永州", "益阳", "张家界", "常德", "衡阳", "湘西", "邵阳", "娄底", "郴州"] },
                       { name: "广东", cities: ["广州", "深圳", "东莞", "佛山", "珠海", "汕头", "韶关", "江门", "梅州", "揭阳", "中山", "河源", "惠州", "茂名", "湛江", "阳江", "潮州", "云浮", "汕尾", "潮阳", "肇庆", "顺德", "清远"] },
                       { name: "广西", cities: ["南宁", "桂林", "柳州", "梧州", "来宾", "贵港", "玉林", "贺州"] },
                       { name: "海南", cities: ["海口", "三亚"] },
                       { name: "重庆", cities: ["渝中", "大渡口", "江北", "沙坪坝", "九龙坡", "南岸", "北碚", "万盛", "双桥", "渝北", "巴南", "万州", "涪陵", "黔江", "长寿"] },
                       { name: "四川", cities: ["成都", "达州", "南充", "乐山", "绵阳", "德阳", "内江", "遂宁", "宜宾", "巴中", "自贡", "康定", "攀枝花"] },
                       { name: "贵州", cities: ["贵阳", "遵义", "安顺", "黔西南", "都匀"] },
                       { name: "云南", cities: ["昆明", "丽江", "昭通", "玉溪", "临沧", "文山", "红河", "楚雄", "大理"] },
                       { name: "西藏", cities: ["拉萨", "林芝", "日喀则", "昌都"] },
                       { name: "陕西", cities: ["西安", "咸阳", "延安", "汉中", "榆林", "商南", "略阳", "宜君", "麟游", "白河"] },
                       { name: "甘肃", cities: ["兰州", "金昌", "天水", "武威", "张掖", "平凉", "酒泉"] },
                       { name: "青海", cities: ["黄南", "海南", "西宁", "海东", "海西", "海北", "果洛", "玉树"] },
                       { name: "宁夏", cities: ["银川", "吴忠"] },
                       { name: "新疆", cities: ["乌鲁木齐", "哈密", "喀什", "巴音郭楞", "昌吉", "伊犁", "阿勒泰", "克拉玛依", "博尔塔拉"] },
                       { name: "香港", cities: ["中西区", "湾仔区", "东区", "南区", "九龙-油尖旺区", "九龙-深水埗区", "九龙-九龙城区", "九龙-黄大仙区", "九龙-观塘区", "新界-北区", "新界-大埔区", "新界-沙田区", "新界-西贡区", "新界-荃湾区", "新界-屯门区", "新界-元朗区", "新界-葵青区", "新界-离岛区"] },
                       { name: "澳门", cities: ["花地玛堂区", "圣安多尼堂区", "大堂区", "望德堂区", "风顺堂区", "嘉模堂区", "圣方济各堂区", "路氹城"]}];

2.html页面，主要就是放置了两个select，使用了jQuery Mobile：

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet"
    href="http://code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.css" />
<title>meetwe</title>
</head>
<body>
    <table width="100%" cellpadding="10">
        <tr>
            <td align="center">请选择省份</td>
            <td align="left"><select id="selectProvince">
                    <option value="-1">请选择省份</option>
            </select></td>
        </tr>
        <tr>
            <td align="center">请选择城市</td>
            <td align="left"><select id="selectCity">
                    <option value="-1">请选择城市</option>
            </select></td>
        </tr>
    </table>
    <script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
    <script  src="http://code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.js"></script>

        <script src="../js/province-and-city-json.js"></script>
        <script src="../js/create-province-and-city.js"></script>
</body>
</html>

3.js代码实现填充下拉列表选项，并响应省一级下拉列表选中项改变事件更改市级下拉列表取值：

$(document).on("pageinit", function() {
    // 填充省下拉列表
    var provincesOptionHtml = "";
    var provinces = [];
    for(var el in provinceAndCityArray) {
        provinces.push(provinceAndCityArray[el].name);
        provincesOptionHtml += "<option value=" + el + ">" + provinceAndCityArray[el].name + "</option>";
    }
    $("#selectProvince").append(provincesOptionHtml);

    // 填充城市下拉列表
    $("#selectProvince").bind("change", function() {
        var selectedProvince = $("#selectProvince :selected").val();
        if(selectedProvince != -1) {
            var citiesOptionHtml = "";
            var cities = [];
            cities = provinceAndCityArray[selectedProvince].cities;
            for(var elCity in cities) {
                citiesOptionHtml += "<option value=" + elCity + ">" + cities[elCity] + "</option>";
            }
            // 清空之前的城市列表
            $("#selectCity option[value!=-1]").remove();
            $("#selectCity option[value=-1]").attr("selected", true);
            $("#selectCity").append(citiesOptionHtml);
            $("#selectCity").selectmenu("refresh");
        }
    });
});