Ajax请求内嵌套Ajax请求示例代码

前段时间做项目，需要把全国省市的两个XML文件整合成一个JSON格式的数据，手写的话觉得数据太多了，而且容易出错，于是就想到了用Ajax嵌套的方法来解决，就想平时用Ajax的方法直接嵌套，都会先读出外面Ajax的内容，然后才读取嵌套在Ajax里面的内容，后面经网上查找资料，加个async：false这个Ajax参数就行了，下面是贴代码：

<script type="text/javascript">
$(function () {
$.ajax({
type: "get",
url: "/XmlData/Provinces.xml",
datatype: "xml",
success: function (xml) {
$("body").append("{");
$(xml).find("Provinces > Province").each(function (i) {
$("body").append("{\"PID\":\"" + $(this).attr("ID") + "\",\"ProvinceName\": \"" + $(this).attr("ProvinceName") + "\",\"Citys\":[");
//根据省份，请求读取该省的市
GetCitys($(this).attr("ID"));
//第二个请求end
$("body").append("]},<br/>");
});
}
});
})
//第二次请求
function GetCitys(pid) {
$.ajax({
type: "get",
url: "/XmlData/Cities.xml",
datatype: "xml",
async: false,//注意！！这个为必要的参数，不然这个会在上面的Ajax请求后才执行
success: function (xml) {
$(xml).find("Cities > City[PID=" + pid + "]").each(function (i) {
$("body").append("{\"CityID\":\"" + $(this).attr("ID") + "\",\"CityName\":\"" + $(this).attr("CityName") + "\"},");
});
}
});
}
</script>

记得在前面加上jq库，

下面把得到的全国省市的JSON数据贴出来，希望以后能用到：

{{\"ProvinceID\":\"1\",\"Province\":\"北京市\",\"City\":[{\"CityID\":\"1\",\"CityName\":\"北京市\"}]},
{\"ProvinceID\":\"2\",\"Province\":\"天津市\",\"City\":[{\"CityID\":\"2\",\"CityName\":\"天津市\"}]},
{\"ProvinceID\":\"3\",\"Province\":\"河北省\",\"City\":[{\"CityID\":\"3\",\"CityName\":\"石家庄市\"},{\"CityID\":\"4\",\"CityName\":\"唐山市\"},{\"CityID\":\"5\",\"CityName\":\"秦皇岛市\"},{\"CityID\":\"6\",\"CityName\":\"邯郸市\"},{\"CityID\":\"7\",\"CityName\":\"邢台市\"},{\"CityID\":\"8\",\"CityName\":\"保定市\"},{\"CityID\":\"9\",\"CityName\":\"张家口市\"},{\"CityID\":\"10\",\"CityName\":\"承德市\"},{\"CityID\":\"11\",\"CityName\":\"沧州市\"},{\"CityID\":\"12\",\"CityName\":\"廊坊市\"},{\"CityID\":\"13\",\"CityName\":\"衡水市\"}]},
{\"ProvinceID\":\"4\",\"Province\":\"山西省\",\"City\":[{\"CityID\":\"14\",\"CityName\":\"太原市\"},{\"CityID\":\"15\",\"CityName\":\"大同市\"},{\"CityID\":\"16\",\"CityName\":\"阳泉市\"},{\"CityID\":\"17\",\"CityName\":\"长治市\"},{\"CityID\":\"18\",\"CityName\":\"晋城市\"},{\"CityID\":\"19\",\"CityName\":\"朔州市\"},{\"CityID\":\"20\",\"CityName\":\"晋中市\"},{\"CityID\":\"21\",\"CityName\":\"运城市\"},{\"CityID\":\"22\",\"CityName\":\"忻州市\"},{\"CityID\":\"23\",\"CityName\":\"临汾市\"},{\"CityID\":\"24\",\"CityName\":\"吕梁市\"}]},
{\"ProvinceID\":\"5\",\"Province\":\"内蒙古自治区\",\"City\":[{\"CityID\":\"25\",\"CityName\":\"呼和浩特市\"},{\"CityID\":\"26\",\"CityName\":\"包头市\"},{\"CityID\":\"27\",\"CityName\":\"乌海市\"},{\"CityID\":\"28\",\"CityName\":\"赤峰市\"},{\"CityID\":\"29\",\"CityName\":\"通辽市\"},{\"CityID\":\"30\",\"CityName\":\"鄂尔多斯市\"},{\"CityID\":\"31\",\"CityName\":\"呼伦贝尔市\"},{\"CityID\":\"32\",\"CityName\":\"巴彦淖尔市\"},{\"CityID\":\"33\",\"CityName\":\"乌兰察布市\"},{\"CityID\":\"34\",\"CityName\":\"兴安盟\"},{\"CityID\":\"35\",\"CityName\":\"锡林郭勒盟\"},{\"CityID\":\"36\",\"CityName\":\"阿拉善盟\"}]},
{\"ProvinceID\":\"6\",\"Province\":\"辽宁省\",\"City\":[{\"CityID\":\"37\",\"CityName\":\"沈阳市\"},{\"CityID\":\"38\",\"CityName\":\"大连市\"},{\"CityID\":\"39\",\"CityName\":\"鞍山市\"},{\"CityID\":\"40\",\"CityName\":\"抚顺市\"},{\"CityID\":\"41\",\"CityName\":\"本溪市\"},{\"CityID\":\"42\",\"CityName\":\"丹东市\"},{\"CityID\":\"43\",\"CityName\":\"锦州市\"},{\"CityID\":\"44\",\"CityName\":\"营口市\"},{\"CityID\":\"45\",\"CityName\":\"阜新市\"},{\"CityID\":\"46\",\"CityName\":\"辽阳市\"},{\"CityID\":\"47\",\"CityName\":\"盘锦市\"},{\"CityID\":\"48\",\"CityName\":\"铁岭市\"},{\"CityID\":\"49\",\"CityName\":\"朝阳市\"},{\"CityID\":\"50\",\"CityName\":\"葫芦岛市\"}]},
{\"ProvinceID\":\"7\",\"Province\":\"吉林省\",\"City\":[{\"CityID\":\"51\",\"CityName\":\"长春市\"},{\"CityID\":\"52\",\"CityName\":\"吉林市\"},{\"CityID\":\"53\",\"CityName\":\"四平市\"},{\"CityID\":\"54\",\"CityName\":\"辽源市\"},{\"CityID\":\"55\",\"CityName\":\"通化市\"},{\"CityID\":\"56\",\"CityName\":\"白山市\"},{\"CityID\":\"57\",\"CityName\":\"松原市\"},{\"CityID\":\"58\",\"CityName\":\"白城市\"},{\"CityID\":\"59\",\"CityName\":\"延边朝鲜族自治州\"}]},
{\"ProvinceID\":\"8\",\"Province\":\"黑龙江省\",\"City\":[{\"CityID\":\"60\",\"CityName\":\"哈尔滨市\"},{\"CityID\":\"61\",\"CityName\":\"齐齐哈尔市\"},{\"CityID\":\"62\",\"CityName\":\"鸡西市\"},{\"CityID\":\"63\",\"CityName\":\"鹤岗市\"},{\"CityID\":\"64\",\"CityName\":\"双鸭山市\"},{\"CityID\":\"65\",\"CityName\":\"大庆市\"},{\"CityID\":\"66\",\"CityName\":\"伊春市\"},{\"CityID\":\"67\",\"CityName\":\"佳木斯市\"},{\"CityID\":\"68\",\"CityName\":\"七台河市\"},{\"CityID\":\"69\",\"CityName\":\"牡丹江市\"},{\"CityID\":\"70\",\"CityName\":\"黑河市\"},{\"CityID\":\"71\",\"CityName\":\"绥化市\"},{\"CityID\":\"72\",\"CityName\":\"大兴安岭地区\"}]},
{\"ProvinceID\":\"9\",\"Province\":\"上海市\",\"City\":[{\"CityID\":\"73\",\"CityName\":\"上海市\"}]},
{\"ProvinceID\":\"10\",\"Province\":\"江苏省\",\"City\":[{\"CityID\":\"74\",\"CityName\":\"南京市\"},{\"CityID\":\"75\",\"CityName\":\"无锡市\"},{\"CityID\":\"76\",\"CityName\":\"徐州市\"},{\"CityID\":\"77\",\"CityName\":\"常州市\"},{\"CityID\":\"78\",\"CityName\":\"苏州市\"},{\"CityID\":\"79\",\"CityName\":\"南通市\"},{\"CityID\":\"80\",\"CityName\":\"连云港市\"},{\"CityID\":\"81\",\"CityName\":\"淮安市\"},{\"CityID\":\"82\",\"CityName\":\"盐城市\"},{\"CityID\":\"83\",\"CityName\":\"扬州市\"},{\"CityID\":\"84\",\"CityName\":\"镇江市\"},{\"CityID\":\"85\",\"CityName\":\"泰州市\"},{\"CityID\":\"86\",\"CityName\":\"宿迁市\"}]},
{\"ProvinceID\":\"11\",\"Province\":\"浙江省\",\"City\":[{\"CityID\":\"87\",\"CityName\":\"杭州市\"},{\"CityID\":\"88\",\"CityName\":\"宁波市\"},{\"CityID\":\"89\",\"CityName\":\"温州市\"},{\"CityID\":\"90\",\"CityName\":\"嘉兴市\"},{\"CityID\":\"91\",\"CityName\":\"湖州市\"},{\"CityID\":\"92\",\"CityName\":\"绍兴市\"},{\"CityID\":\"93\",\"CityName\":\"金华市\"},{\"CityID\":\"94\",\"CityName\":\"衢州市\"},{\"CityID\":\"95\",\"CityName\":\"舟山市\"},{\"CityID\":\"96\",\"CityName\":\"台州市\"},{\"CityID\":\"97\",\"CityName\":\"丽水市\"}]},
{\"ProvinceID\":\"12\",\"Province\":\"安徽省\",\"City\":[{\"CityID\":\"98\",\"CityName\":\"合肥市\"},{\"CityID\":\"99\",\"CityName\":\"芜湖市\"},{\"CityID\":\"100\",\"CityName\":\"蚌埠市\"},{\"CityID\":\"101\",\"CityName\":\"淮南市\"},{\"CityID\":\"102\",\"CityName\":\"马鞍山市\"},{\"CityID\":\"103\",\"CityName\":\"淮北市\"},{\"CityID\":\"104\",\"CityName\":\"铜陵市\"},{\"CityID\":\"105\",\"CityName\":\"安庆市\"},{\"CityID\":\"106\",\"CityName\":\"黄山市\"},{\"CityID\":\"107\",\"CityName\":\"滁州市\"},{\"CityID\":\"108\",\"CityName\":\"阜阳市\"},{\"CityID\":\"109\",\"CityName\":\"宿州市\"},{\"CityID\":\"110\",\"CityName\":\"巢湖市\"},{\"CityID\":\"111\",\"CityName\":\"六安市\"},{\"CityID\":\"112\",\"CityName\":\"亳州市\"},{\"CityID\":\"113\",\"CityName\":\"池州市\"},{\"CityID\":\"114\",\"CityName\":\"宣城市\"}]},
{\"ProvinceID\":\"13\",\"Province\":\"福建省\",\"City\":[{\"CityID\":\"115\",\"CityName\":\"福州市\"},{\"CityID\":\"116\",\"CityName\":\"厦门市\"},{\"CityID\":\"117\",\"CityName\":\"莆田市\"},{\"CityID\":\"118\",\"CityName\":\"三明市\"},{\"CityID\":\"119\",\"CityName\":\"泉州市\"},{\"CityID\":\"120\",\"CityName\":\"漳州市\"},{\"CityID\":\"121\",\"CityName\":\"南平市\"},{\"CityID\":\"122\",\"CityName\":\"龙岩市\"},{\"CityID\":\"123\",\"CityName\":\"宁德市\"}]},
{\"ProvinceID\":\"14\",\"Province\":\"江西省\",\"City\":[{\"CityID\":\"124\",\"CityName\":\"南昌市\"},{\"CityID\":\"125\",\"CityName\":\"景德镇市\"},{\"CityID\":\"126\",\"CityName\":\"萍乡市\"},{\"CityID\":\"127\",\"CityName\":\"九