Newtonsoft.Json 设置全局输出格式（日期格式，驼峰规则等）

Newtonsoft.Json.JsonSerializerSettings setting = new Newtonsoft.Json.JsonSerializerSettings();
JsonConvert.DefaultSettings = new Func<JsonSerializerSettings>(() =>
{
    //日期类型默认格式化处理
    setting.DateFormatHandling = Newtonsoft.Json.DateFormatHandling.MicrosoftDateFormat;
    setting.DateFormatString = "yyyy-MM-dd HH:mm:ss";

    //空值处理
    //setting.NullValueHandling = NullValueHandling.Ignore;

    setting.ContractResolver = new Newtonsoft.Json.Serialization.CamelCasePropertyNamesContractResolver();

    return setting;


});

JsonConvert.SerializeObject(result, setting)