Unity3D中使用MiniJson解析json的例子

json：

---------------------------------

{
    "name":"中国",
    "province":[
        {
            "name":"黑龙江",
            "cities":{
                "city":[
                    "哈尔滨",
                    "大庆"
                ]
            }
        },
        {
            "name":"广东",
            "cities":{
                "city":[
                    "广州",
                    "深圳",
                    "珠海"
                ]
            }
        },
        {
            "name":"台湾",
            "cities":{
                "city":[
                    "台北",
                    "高雄"
                ]
            }
        },
        {
            "name":"新疆",
            "cities":{
                "city":[
                    "乌鲁木齐"
                ]
            }
        }
    ]
}

--------------------------------

public class JsonDeserialize
{
    protected string url = "http://localhost:8080/AssetBundleData/Web/Singlea/";
}

using UnityEngine;
using System.Collections.Generic;

public class ChinaJsonDeserialize : JsonDeserialize
{
    private China _china;

    public China china
    {
        get
        {
            return _china;
        }
    }

    public ChinaJsonDeserialize(string jsonData)
    {
        _china = new China();
        ParseJson(jsonData);
    }

    void ParseJson(string jsonData)
    {

        if (string.IsNullOrEmpty(jsonData))
        {
            Debug.LogError("ChinaJson is null or empty");
            return;
        } 

        Dictionary<string, object> jsonObjects = MiniJSON.Json.Deserialize(jsonData) as Dictionary<string, object>;
        _china.chinaName = jsonObjects["name"].ToString();
        _china.province = new List<Province>();

        List<object> provinceList = jsonObjects["province"] as List<object>;

        foreach (var i in provinceList)
        {
            Dictionary<string, object> province = i as Dictionary<string, object>;
            Province provinceObj = new Province();
            provinceObj.provinceName = province["name"].ToString();
            provinceObj.city = new List<City>();

            Dictionary<string, object> citesDic = province["cities"] as Dictionary<string, object>;

            List<object> childCitesList = citesDic["city"] as List<object>;
            foreach (var childCity in childCitesList)
            {
                City city = new City();
                city.cityName = childCity.ToString();

                provinceObj.city.Add(city);
            }

            _china.province.Add(provinceObj);
        }
    }
}

public class China
{
    public string chinaName;
    public List<Province> province;
}

public class Province
{
    public string provinceName;
    public List<City> city;
}

public class City
{
    public string cityName;
}

using UnityEngine;
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;

namespace MiniJSON {

    public static class Json {
        /// <summary>
        /// Parses the string json into a value
        /// </summary>
        /// <param name="json">A JSON string.</param>
        /// <returns>An List<object>, a Dictionary<string, object>, a double, an integer,a string, null, true, or false</returns>
        public static object Deserialize(string json) {
            // save the string for debug information
            if (json == null) {
                return null;
            }

            return Parser.Parse(json);
        }

        sealed class Parser : IDisposable {
            const string WHITE_SPACE = " \t\n\r";
            const string WORD_BREAK = " \t\n\r{}[],:\"";

            enum TOKEN {
                NONE,
                CURLY_OPEN,
                CURLY_CLOSE,
                SQUARED_OPEN,
                SQUARED_CLOSE,
                COLON,
                COMMA,
                STRING,
                NUMBER,
                TRUE,
                FALSE,
                NULL
            };

            StringReader json;

            Parser(string jsonString) {
                json = new StringReader(jsonString);
            }

            public static object Parse(string jsonString) {
                using (var instance = new Parser(jsonString)) {
                    return instance.ParseValue();
                }
            }

            public void Dispose() {
                json.Dispose();
                json = null;
            }

            Dictionary<string, object> ParseObject() {
                Dictionary<string, object> table = new Dictionary<string, object>();

                // ditch opening brace
                json.Read();

                // {
                while (true) {
                    switch (NextToken) {
                    case TOKEN.NONE:
                        return null;
                    case TOKEN.COMMA:
                        continue;
                    case TOKEN.CURLY_CLOSE:
                        return table;
                    default:
                        // name
                        string name = ParseString();
                        if (name == null) {
                            return null;
                        }

                        // :
                        if (NextToken != TOKEN.COLON) {
                            return null;
                        }
                        // ditch the colon
                        json.Read();

                        // value
                        table[name] = ParseValue();
                        break;
                    }
                }
            }

            List<object> ParseArray() {
                List<object> array = new List<object>();

                // ditch opening bracket
                json.Read();

                // [
                var parsing = true;
                while (parsing) {
                    TOKEN nextToken = NextToken;

                    switch (nextToken) {
                    case TOKEN.NONE:
                        return null;
                    case TOKEN.COMMA:
                        continue;
                    case TOKEN.SQUARED_CLOSE:
                        parsing = false;
                        break;
                    default:
                        object value = ParseByToken(nextToken);

                        array.Add(value);
                        break;
                    }
                }

                return array;
            }

            object ParseValue() {
                TOKEN nextToken = NextToken;
                return ParseByToken(nextToken);
            }

            object ParseByToken(TOKEN token) {
                switch (token) {
                case TOKEN.STRING:
                    return ParseString();
                case TOKEN.NUMBER:
                    return ParseNumber();
                case TOKEN.CURLY_OPEN:
                    return ParseObject();
                case TOKEN.SQUARED_OPEN:
                    return ParseArray();
                case TOKEN.TRUE:
                    return true;
                case TOKEN.FALSE:
                    return false;
                case TOKEN.NULL:
                    return null;
                default:
                    return null;
                }
            }

            string ParseString() {
                StringBuilder s = new StringBuilder();
                char c;

                // ditch opening quote
                json.Read();

                bool parsing = true;
                while (parsing) {

                    if (json.Peek() == -1) {
                        parsing = false;
                        break;
                    }

                    c = NextChar;
                    switch (c) {
                    case '"':
                        parsing = false;
                        break;
                    case '\\':
                        if (json.Peek() == -1) {
                            parsing = false;
                            break;
                        }

                        c = NextChar;
                        switch (c) {
                        case '"':
                        case '\\':
                        case '/':
                            s.Append(c);
                            break;
                        case 'b':
                            s.Append('\b');
                            break;
                        case 'f':
                            s.Append('\f');
                            break;
                        case 'n':
                            s.Append('\n');
                            break;
                        case 'r':
                            s.Append('\r');
                            break;
                        case 't':
                            s.Append('\t');
                            break;
                        case 'u':
                            var hex = new StringBuilder();

                            for (int i=0; i< 4; i++) {
                                hex.Append(NextChar);
                            }

                            s.Append((char) Convert.ToInt32(hex.ToString(), 16));
                            break;
                        }
                        break;
                    default:
                        s.Append(c);
                        break;
                    }
                }

                return s.ToString();
            }

            object ParseNumber() {
                string number = NextWord;

                if (number.IndexOf('.') == -1) {
                    long parsedInt;
                    Int64.TryParse(number, out parsedInt);
                    return parsedInt;
                }

                double parsedDouble;
                Double.TryParse(number, out parsedDouble);
                return parsedDouble;
            }

            void EatWhitespace() {
                while (WHITE_SPACE.IndexOf(PeekChar) != -1) {
                    json.Read();

                    if (json.Peek() == -1) {
                        break;
                    }
                }
            }

            char PeekChar {
                get {
                    return Convert.ToChar(json.Peek());
                }
            }

            char NextChar {
                get {
                    return Convert.ToChar(json.Read());
                }
            }

            string NextWord {
                get {
                    StringBuilder word = new StringBuilder();

                    while (WORD_BREAK.IndexOf(PeekChar) == -1) {
                        word.Append(NextChar);

                        if (json.Peek() == -1) {
                            break;
                        }
                    }

                    return word.ToString();
                }
            }

            TOKEN NextToken {
                get {
                    EatWhitespace();

                    if (json.Peek() == -1) {
                        return TOKEN.NONE;
                    }

                    char c = PeekChar;
                    switch (c) {
                    case '{':
                        return TOKEN.CURLY_OPEN;
                    case '}':
                        json.Read();
                        return TOKEN.CURLY_CLOSE;
                    case '[':
                        return TOKEN.SQUARED_OPEN;
                    case ']':
                        json.Read();
                        return TOKEN.SQUARED_CLOSE;
                    case ',':
                        json.Read();
                        return TOKEN.COMMA;
                    case '"':
                        return TOKEN.STRING;
                    case ':':
                        return TOKEN.COLON;
                    case '0':
                    case '1':
                    case '2':
                    case '3':
                    case '4':
                    case '5':
                    case '6':
                    case '7':
                    case '8':
                    case '9':
                    case '-':
                        return TOKEN.NUMBER;
                    }

                    string word = NextWord;

                    switch (word) {
                    case "false":
                        return TOKEN.FALSE;
                    case "true":
                        return TOKEN.TRUE;
                    case "null":
                        return TOKEN.NULL;
                    }

                    return TOKEN.NONE;
                }
            }
        }

        /// <summary>
        /// Converts a IDictionary / IList object or a simple type (string, int, etc.) into a JSON string
        /// </summary>
        /// <param name="json">A Dictionary<string, object> / List<object></param>
        /// <returns>A JSON encoded string, or null if object 'json' is not serializable</returns>
        public static string Serialize(object obj) {
            return Serializer.Serialize(obj);
        }

        sealed class Serializer {
            StringBuilder builder;

            Serializer() {
                builder = new StringBuilder();
            }

            public static string Serialize(object obj) {
                var instance = new Serializer();

                instance.SerializeValue(obj);

                return instance.builder.ToString();
            }

            void SerializeValue(object value) {
                IList asList;
                IDictionary asDict;
                string asStr;

                if (value == null) {
                    builder.Append("null");
                }
                else if ((asStr = value as string) != null) {
                    SerializeString(asStr);
                }
                else if (value is bool) {
                    builder.Append(value.ToString().ToLower());
                }
                else if ((asList = value as IList) != null) {
                    SerializeArray(asList);
                }
                else if ((asDict = value as IDictionary) != null) {
                    SerializeObject(asDict);
                }
                else if (value is char) {
                    SerializeString(value.ToString());
                }
                else {
                    SerializeOther(value);
                }
            }

            void SerializeObject(IDictionary obj) {
                bool first = true;

                builder.Append('{');

                foreach (object e in obj.Keys) {
                    if (!first) {
                        builder.Append(',');
                    }

                    SerializeString(e.ToString());
                    builder.Append(':');

                    SerializeValue(obj[e]);

                    first = false;
                }

                builder.Append('}');
            }

            void SerializeArray(IList anArray) {
                builder.Append('[');

                bool first = true;

                foreach (object obj in anArray) {
                    if (!first) {
                        builder.Append(',');
                    }

                    SerializeValue(obj);

                    first = false;
                }

                builder.Append(']');
            }

            void SerializeString(string str) {
                builder.Append('\"');

                char[] charArray = str.ToCharArray();
                foreach (var c in charArray) {
                    switch (c) {
                    case '"':
                        builder.Append("\\\"");
                        break;
                    case '\\':
                        builder.Append("\\\\");
                        break;
                    case '\b':
                        builder.Append("\\b");
                        break;
                    case '\f':
                        builder.Append("\\f");
                        break;
                    case '\n':
                        builder.Append("\\n");
                        break;
                    case '\r':
                        builder.Append("\\r");
                        break;
                    case '\t':
                        builder.Append("\\t");
                        break;
                    default:
                        int codepoint = Convert.ToInt32(c);
                        if ((codepoint >= 32) && (codepoint <= 126)) {
                            builder.Append(c);
                        }
                        else {
                            builder.Append("\\u" + Convert.ToString(codepoint, 16).PadLeft(4, '0'));
                        }
                        break;
                    }
                }

                builder.Append('\"');
            }

            void SerializeOther(object value) {
                if (value is float
                    || value is int
                    || value is uint
                    || value is long
                    || value is double
                    || value is sbyte
                    || value is byte
                    || value is short
                    || value is ushort
                    || value is ulong
                    || value is decimal) {
                    builder.Append(value.ToString());
                }
                else {
                    SerializeString(value.ToString());
                }
            }
        }
    }
}