JSON(JavaScript Object Notation) 是一种轻量级的数据交换花样。它基于JavaScript(Standard ECMA-262 3rd Edition - December 1999)的一个子集。 JSON采纳完整独立于言语的文本花样,然则也运用了类似于C言语家属的习气(包含C, C++, C#, Java, JavaScript, Perl, Python等)。这些特征使JSON成为抱负的数据交换言语。易于人浏览和编写,同时也易于机械剖析和生成。
假如曾运用过Json,就会清晰Json能够分为两个部份:
1. Json Object(A collection of name/value pairs)
2. JSON Array (An ordered list of values)
剖析JSON的开源包异常多,在种种场所运用异常普遍,特别善于收集传输。
本文引见运用LitJson,并用C#言语来引见运用JSON,能够在C#应用顺序,web顺序,另有Unity3d C#剧本中运用。
第一步:先去下载LitJson并导入当前的项目。
第二步:litJson的几个实例体式格局
1.运用JsonData来处置惩罚生成json:{"name":"peiandsky","age":28,"sex":"male"}
JsonData data = new JsonData(); data["name"] = "peiandsky"; data["age"] = 28; data["sex"] ="male"; string json1= data.ToJson();
2.对象中嵌套对象:{"name":"peiandsky","info":{"sex":"male","age":28}}
JsonData data2 = new JsonData(); data2["name"] = "peiandsky"; data2["info"] = new JsonData(); data2["info"]["sex"] = "male"; data2["info"]["age"] = 28; string json2 = data2.ToJson();
3. 将上述两种体式格局的Json剖析到JsonData
JsonData jsonData2 = JsonMapper.ToObject(json2); Debug.Log(jsonData2["name"] + " " + data2["info"]["sex"]);
4.运用JsonMapper来处置惩罚Json
Player player = new Player(); player.name = "peiandsky"; player.age = 23; player.sex = "male"; string json=JsonMapper.ToJson(player);
5. 剖析4中的json
Player player2 = JsonMapper.ToObject<Player>(json);
6. 运用最原始的体式格局生成Json
将数组转换成json:["one","two","three","four"]
JsonWriter writer = new JsonWriter(); writer.WriteArrayStart(); writer.Write("one"); writer.Write("two"); writer.Write("three"); writer.Write("four"); writer.WriteArrayEnd();
将复合对象转换成json字符串:{"book":{"title":"android game!","author":"pei","bookdetail":{"pages":429,"about":null}}}
JsonWriter writer2 = new JsonWriter(); writer2.WriteObjectStart(); writer2.WritePropertyName("book"); writer2.WriteObjectStart(); writer2.WritePropertyName("title"); writer2.Write("android game!"); writer2.WritePropertyName("author"); writer2.Write("pei"); writer2.WritePropertyName("bookdetail"); writer2.WriteObjectStart(); writer2.WritePropertyName("pages"); writer2.Write(429); writer2.WritePropertyName("about"); writer2.Write(null); writer2.WriteObjectEnd(); writer2.WriteObjectEnd(); writer2.WriteObjectEnd(); Debug.Log(writer2.ToString());
这类体式格局异常不方便,不发起运用。
在运用LitJson中,发起运用JsonData,JsonMapper来处置惩罚Json的编码和剖析。
Person[] p_array = { p,p,p}; string json_array=JsonMapper.ToJson(p_array); Debug.Log(json_array); JsonData pa = JsonMapper.ToObject(json_array); Debug.Log(pa.IsArray+" "+pa.Count); for (int i = 0; i < pa.Count;i++ ) { Debug.Log(pa[i]["name"]+"-"+pa[i]["age"]+"-"+pa[i]["score"]+"-"+pa[i]["birth"]); int age = int.Parse(pa[i]["age"].ToString()); Debug.Log(age); }
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