概念介绍
还是先简单说说Json的一些例子吧。注意，以下概念是我自己定义的，可以参考.net里面的TYPE的模型设计
如果有争议，欢迎提出来探讨！
1.最简单：
{"total":0}
total就是值，值是数值，等于0
2. 复杂点
{"total":0,"data":{"377149574" : 1}}
total是值，data是对象，这个对象包含了"377149574"这个值，等于1
3. 最复杂
{"total":0,"data":{"377149574":[{"cid":"377149574"}]}}
total是值，data是对象,377149574是数组，这个数组包含了一些列的对象，例如{"cid":"377149574"}这个对象。
有了以上的概念，就可以设计出通用的json模型了。
万能JSON源码：
using System;
using System.Collections.Generic;
using System.Text;
namespace Pixysoft.Json
{
public class CommonJsonModelAnalyzer
{
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;
}
}
}
using System;
using System.Collections.Generic;
using System.Text;
namespace Pixysoft.Json
{
public class CommonJsonModel : CommonJsonModelAnalyzer
{
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);
}
}
}
}
使用方法
public CommonJsonModel DeSerialize(string json)
{
return new CommonJsonModel(json);
}
超级简单，只要new一个通用对象，把json字符串放进去就行了。
针对上文的3个例子，我给出3种使用方法:
{"total":0}
CommonJsonModel model = DeSerialize(json);
model.GetValue("total") // return 0
{"total":0,"data":{"377149574" : 1}}
CommonJsonModel model = DeSerialize(json);
model.GetModel("data").GetValue("377149574") //return 1
{"total":0,"data":{"377149574":[{"cid":"377149574"}]}}
CommonJsonModel model = DeSerialize(json);
model.GetCollection("377149574").GetCollection()[0].GetValue("cid") //return 377149574
这个有点点复杂，
1. 首先377149574代表了一个集合，所以要用model.GetCollection("377149574")把这个集合取出来。
2. 其次这个集合里面包含了很多对象，因此用GetColllection()把这些对象取出来
3. 在这些对象List里面取第一个[0]，表示取了":{"cid":"377149574"}这个对象，然后再用GetValue("cid"）把对象的值取出来。
