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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巴特西

Json 不同语言的使用

Javascript:

PHP:

Java:

C#:

Python:

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