Json 不同语言的使用

Javascript:

1.使用eval var parse_json_by_eval = function(str){return eval('('+str+')'); } var value = 1; var jsonstr = '{"name":"jifeng","company":"taobao","value":++value}'; var json1 = parse_json_by_eval(jsonstr); console.log(json1); console.log('value: '+ value); 執行結果：{ name: 'jifeng', company: 'taobao', value: 2 } value: 2 2.使用JSON.parse var parse_json_by_JSON_parse = function(str){return JSON.parse(str); } value = 1; var jsonstr = '{"name":"jifeng","company":"taobao"}'; var json2 = parse_json_by_JSON_parse(jsonstr); console.log(json2); console.log(value); From：http://www.cnblogs.com/lengyuhong/archive/2012/01/07/2262390.html 以上代码来自博客：http://www.cnblogs.com/lengyuhong/archive/2012/01/07/2262390.html

PHP:

$json_string='{"id":1,"name":"jb51","email":"admin@jb51.net","interest":["wordpress","php"]} '; $obj=json_decode($json_string); echo $obj->name; //prints foo echo $obj->interest[1]; //prints php

Java:

JSONObject dataJson=new JSONObject("你的Json数据“); JSONObject response=dataJson.getJSONObject("response"); JSONArray data=response.getJSONArray("data"); JSONObject info=data.getJSONObject(0); String province=info.getString("province"); String city=info.getString("city"); String district=info.getString("district"); String address=info.getString("address");System.out.println(province+city+district+address);

C#:

使用开源的类库Newtonsoft.Json(下载地址http://json.codeplex.com/)。下载后加入工程就能用。通常可以使用JObject, JsonReader, JsonWriter处理。这种方式最通用，也最灵活，可以随时修改不爽的地方。 (1)使用JsonReader读Json字符串： [csharp] view plaincopy string jsonText =@"{""input"" : ""value"",""output"" : ""result""}"; JsonReader reader = new JsonTextReader(newStringReader(jsonText)); while (reader.Read()) {Console.WriteLine(reader.TokenType + "\t\t" + reader.ValueType+ "\t\t" + reader.Value); }(2)使用JsonWriter写字符串： [csharp] view plaincopy StringWriter sw = new StringWriter(); JsonWriter writer = new JsonTextWriter(sw);writer.WriteStartObject(); writer.WritePropertyName("input"); writer.WriteValue("value"); writer.WritePropertyName("output"); writer.WriteValue("result"); writer.WriteEndObject(); writer.Flush();string jsonText =sw.GetStringBuilder().ToString(); Console.WriteLine(jsonText);(3)使用JObject读写字符串： [csharp] view plaincopy JObject jo = JObject.Parse(jsonText); string[] values =jo.Properties().Select(item => item.Value.ToString()).ToArray();(4)使用JsonSerializer读写对象(基于JsonWriter与JsonReader): 数组型数据 [csharp] view plaincopy string jsonArrayText1 ="[{'a':'a1','b':'b1'},{'a':'a2','b':'b2'}]"; JArray ja =(JArray)JsonConvert.DeserializeObject(jsonArrayText1); string ja1a =ja[1]["a"].ToString(); //或者 JObject o = (JObject)ja[1]; string oa = o["a"].ToString();

Python:

import json data= json.loads('{"ID": "2", "IP":"12.12.12.12", "Port": "3000", "Sensor_Count":"1", "Control_Count": "1", "Sensors":{"Sensor_Name": "tem", "Type_Count": "1", "Types":{ "types":["temp","C"],"types":["hum","N"],}},"Controls":["LCD","Relay"] }') print data['ID'] 输出结果:"2" data = json.dump(data) print data 输出结果:{"ID": "2", "IP":"12.12.12.12", "Port": "3000", "Sensor_Count":"1", "Control_Count": "1", "Sensors":{"Sensor_Name": "tem", "Type_Count": "1", "Types":{ "types":["temp","C"],"types":["hum","N"],}},"Controls":["LCD","Relay"] }

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