用c#写一个json的万能解析器
CommonJsonModel .cs
/// <summary> /// 万能JSON解析器 /// </summary> public class CommonJsonModel : CommonJsonModelAnalyze { private string rawjson; private bool isValue = false; private bool isModel = false; private bool isCollection = false; internal CommonJsonModel(string rawjson) { this.rawjson = rawjson; if (string.IsNullOrEmpty(rawjson)) throw new Exception("missing rawjson"); rawjson = rawjson.Trim(); if (rawjson.StartsWith("{")) { isModel = true; } else if (rawjson.StartsWith("[")) { isCollection = true; } else { isValue = true; } } public string Rawjson { get { return rawjson; } } public bool IsValue() { return isValue; } public bool IsValue(string key) { if (!isModel) return false; if (string.IsNullOrEmpty(key)) return false; foreach (string subjson in base._GetCollection(this.rawjson)) { CommonJsonModel model = new CommonJsonModel(subjson); if (!model.IsValue()) continue; if (model.Key == key) { CommonJsonModel submodel = new CommonJsonModel(model.Value); return submodel.IsValue(); } } return false; } public bool IsModel() { return isModel; } public bool IsModel(string key) { if (!isModel) return false; if (string.IsNullOrEmpty(key)) return false; foreach (string subjson in base._GetCollection(this.rawjson)) { CommonJsonModel model = new CommonJsonModel(subjson); if (!model.IsValue()) continue; if (model.Key == key) { CommonJsonModel submodel = new CommonJsonModel(model.Value); return submodel.IsModel(); } } return false; } public bool IsCollection() { return isCollection; } public bool IsCollection(string key) { if (!isModel) return false; if (string.IsNullOrEmpty(key)) return false; foreach (string subjson in base._GetCollection(this.rawjson)) { CommonJsonModel model = new CommonJsonModel(subjson); if (!model.IsValue()) continue; if (model.Key == key) { CommonJsonModel submodel = new CommonJsonModel(model.Value); return submodel.IsCollection(); } } return false; } /// <summary> /// 当模型是对象，返回拥有的key /// </summary> /// <returns></returns> public List<string> GetKeys() { if (!isModel) return null; List<string> list = new List<string>(); foreach (string subjson in base._GetCollection(this.rawjson)) { string key = new CommonJsonModel(subjson).Key; if (!string.IsNullOrEmpty(key)) list.Add(key); } return list; } /// <summary> /// 当模型是对象，key对应是值，则返回key对应的值 /// </summary> /// <param name="key"></param> /// <returns></returns> public string GetValue(string key) { if (!isModel) return null; if (string.IsNullOrEmpty(key)) return null; foreach (string subjson in base._GetCollection(this.rawjson)) { CommonJsonModel model = new CommonJsonModel(subjson); if (!model.IsValue()) continue; if (model.Key == key) return model.Value; } return null; } /// <summary> /// 模型是对象，key对应是对象，返回key对应的对象 /// </summary> /// <param name="key"></param> /// <returns></returns> public CommonJsonModel GetModel(string key) { if (!isModel) return null; if (string.IsNullOrEmpty(key)) return null; foreach (string subjson in base._GetCollection(this.rawjson)) { CommonJsonModel model = new CommonJsonModel(subjson); if (!model.IsValue()) continue; if (model.Key == key) { CommonJsonModel submodel = new CommonJsonModel(model.Value); if (!submodel.IsModel()) return null; else return submodel; } } return null; } /// <summary> /// 模型是对象，key对应是集合，返回集合 /// </summary> /// <param name="key"></param> /// <returns></returns> public CommonJsonModel GetCollection(string key) { if (!isModel) return null; if (string.IsNullOrEmpty(key)) return null; foreach (string subjson in base._GetCollection(this.rawjson)) { CommonJsonModel model = new CommonJsonModel(subjson); if (!model.IsValue()) continue; if (model.Key == key) { CommonJsonModel submodel = new CommonJsonModel(model.Value); if (!submodel.IsCollection()) return null; else return submodel; } } return null; } /// <summary> /// 模型是集合，返回自身 /// </summary> /// <returns></returns> public List<CommonJsonModel> GetCollection() { List<CommonJsonModel> list = new List<CommonJsonModel>(); if (IsValue()) return list; foreach (string subjson in base._GetCollection(rawjson)) { list.Add(new CommonJsonModel(subjson)); } return list; } /// <summary> /// 当模型是值对象，返回key /// </summary> private string Key { get { if (IsValue()) return base._GetKey(rawjson); return null; } } /// <summary> /// 当模型是值对象，返回value /// </summary> private string Value { get { if (!IsValue()) return null; return base._GetValue(rawjson); } } }
CommonJsonModelAnalyze.cs
public class CommonJsonModelAnalyze { protected string _GetKey(string rawjson) { if (string.IsNullOrEmpty(rawjson)) return rawjson; rawjson = rawjson.Trim(); string[] jsons = rawjson.Split(new char[] { ':' }); if (jsons.Length < 2) return rawjson; return jsons[0].Replace("\"", "").Trim(); } protected string _GetValue(string rawjson) { if (string.IsNullOrEmpty(rawjson)) return rawjson; rawjson = rawjson.Trim(); string[] jsons = rawjson.Split(new char[] { ':' }, StringSplitOptions.RemoveEmptyEntries); if (jsons.Length < 2) return rawjson; StringBuilder builder = new StringBuilder(); for (int i = 1; i < jsons.Length; i++) { builder.Append(jsons[i]); builder.Append(":"); } if (builder.Length > 0) builder.Remove(builder.Length - 1, 1); string value = builder.ToString(); if (value.StartsWith("\"")) value = value.Substring(1); if (value.EndsWith("\"")) value = value.Substring(0, value.Length - 1); return value; } protected List<string> _GetCollection(string rawjson) { //[{},{}] List<string> list = new List<string>(); if (string.IsNullOrEmpty(rawjson)) return list; rawjson = rawjson.Trim(); StringBuilder builder = new StringBuilder(); int nestlevel = -1; int mnestlevel = -1; for (int i = 0; i < rawjson.Length; i++) { if (i == 0) continue; else if (i == rawjson.Length - 1) continue; char jsonchar = rawjson[i]; if (jsonchar == '{') { nestlevel++; } if (jsonchar == '}') { nestlevel--; } if (jsonchar == '[') { mnestlevel++; } if (jsonchar == ']') { mnestlevel--; } if (jsonchar == ',' && nestlevel == -1 && mnestlevel == -1) { list.Add(builder.ToString()); builder = new StringBuilder(); } else { builder.Append(jsonchar); } } if (builder.Length > 0) list.Add(builder.ToString()); return list; } }
上面是json的C#的一个解析器，下面是方法的调用
/// <summary> /// 引用此方法 /// </summary> /// <param name="json"></param> /// <returns></returns> public static CommonJsonModel DeSerialize(string json) { return new CommonJsonModel(json); }
上面的方法的引用，下面是引用之后的解析实例
/// <summary> /// 解析JSON:返回Checking Availability & Pricing /// </summary> /// <param name="checkAvailabilityJson"></param> /// <param name="PickupClass">变量;为空值时返回false</param> /// <returns>包含Hotel时获取Itineraries列表</returns> public static List<Decode_PickupClassHotelList> GetListHotels(string checkAvailabilityJson, string PickupClass) { List<Decode_PickupClassHotelList> db_ListHotel = new List<Decode_PickupClassHotelList>(); CommonJsonModel model = DeSerialize(checkAvailabilityJson); //酒店不为空时 if (PickupClass != "false") { //是否有就酒店接送的免费服务 string PickupServiceAvailable=model.GetValue("PickupServiceAvailable"); if(PickupServiceAvailable.ToLower().Trim().Equals("true")) { //获取Hotel酒店列表 List<CommonJsonModel> ListHotel = model.GetModel("PickupClassHotelList").GetCollection("" + PickupClass + "").GetCollection(); if (ListHotel.Count > 0) { foreach (var p in ListHotel) { Decode_PickupClassHotelList db_model = new Decode_PickupClassHotelList(); db_model.id = p.GetValue("id"); db_ListHotel.Add(db_model); } } } } return db_ListHotel; }
