ASP.NET万能JSON解析器

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。

posted @ 2011-09-03 14:43 一方一净土阅读(12713) 评论(3) 编辑收藏举报

一方一净土'瞧瞧 dot net

ASP.NET万能JSON解析器

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