汉字排序

mongoDB方法中没有提供汉字排序的功能，除非必须存汉字对应的ascii码，才能需要排序，但这样做又使数据库增加负担。最好的做法就是，数据库只存名称，前端获取到值之后，自己进行排序，这样就能提高性能，又能做到用户需求。

比如前端获得后台返回值：

"data2":["全场广告商户1","全场广告商户2","二号餐厅","三号咖啡","jhct","xiong","huhu1","绿茶餐厅","江南厨子","新月饭店","鑫益达","bhct","全场广告商户3","柳柳3","商户后台","全场广告商户4","测试","测试2","星巴克","猫屎咖啡","维拉度假别墅"]

代码实现：

$scope.getParkingNameList = data.data2;
$scope.getParkingNameList = $scope.getParkingNameList.sort(
    function compareFunction(param1,param2) {
        return param1.localeCompare(param2);
    }
);

排序之后：

["测试", "测试2", "二号餐厅", "江南厨子", "柳柳3", "绿茶餐厅", "猫屎咖啡", "全场广告商户1", "全场广告商户2", "全场广告商户3", "全场广告商户4", "三号咖啡", "商户后台", "维拉度假别墅", "新月饭店", "鑫益达", "星巴克", "bhct", "huhu1", "jhct", "xiong"]

比如前端获得后台返回值：

"data":[
{"parkingName":"小猫停车场","parkId":"99999888881474167822"},{"parkingName":"软件产业基地停车场","parkId":"0755000021433988491"},{"parkingName":"已审核停车场17","parkId":"99999999991474183853"},
{"parkingName":"上川停车场","parkId":"11111222221474251256"},{"parkingName":"冰天雪地","parkId":"44444444441474266013"},{"parkingName":"冬天停车场","parkId":"55555555551474268580"},
{"parkingName":"无敌停车场","parkId":"66666666661474265947"},{"parkingName":"花都停车场","parkId":"10732170901477292809"},{"parkingName":"熊猫国际软件园","parkId":"12345123451478226975"},
{"parkingName":"小猫猫","parkId":"78945612301479432508"},{"parkingName":"后台2","parkId":"18681498421480595335"},{"parkingName":"旧版测试停车场","parkId":"18712345671481190728"},
{"parkingName":"测试停车场","parkId":"88888888881481708747"},{"parkingName":"无敌加油站321","parkId":"158273559891482455244"},{"parkingName":"young加油站1","parkId":"1234561482739920"}]

代码实现：

function compare(key){
      return function (obj1,obj2){
          var val1= obj1[key];
          var val2= obj2[key];
          return val1.localeCompare(val2);
      }
 };
 $scope.openMonthCardList=data.data.sort(compare("parkingName"));

这是利用 JavaScript localeCompare() 的方法，localeCompare() 方法提供的比较字符串的方法，考虑了默认的本地排序规则。ECMAscript 标准并没有规定如何进行本地特定的比较操作，它只规定该函数采用底层操作系统提供的排序规则。