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  • json字符串和对象的相互转化

    json在代码中是经常用到的,在此总结一下json字符串和对象及数组之间的相互转化:

      1.javascript函数方式:

        <1> JSON.stringify :把一个对象转换成json字符串   

    1 var jsonO = {name:"jack",age:20};
    2 JSON.stringify(jsonO);
    3 ==>  '{name:"jack",age:20}';
    4 
    5 var jsonO = [{name:"jack",age:20},{name:"tom",age:21},{name:"jim",age:22}];
    6 JSON.stringify(jsonO);
    7 ==>  '[{name:"jack",age:20},{name:"tom",age:21},{name:"jim",age:22}]';

        <2> JSON.parse 把一个json字符串解析成对象。

    var jsonS = '{"name":"John"}';
    JSON.parse(jsonS);
    ==>  Object object

      2.jquery方式:

        jquery中 $.parseJSON(json)将json转换为Javascript对象,但没有提供将Javascript对象转换成json的函数。

    var jsonS = '{"name":"Jack"}';
    var jsonObj = $.parseJSON(json); 

      3.javaScript只带函数eval(),可以将json字符串转化成javascript对象

    var jsonS = '[{name:"tom",age:21},{name:"Lily",age:22},{name:"John",age:23}]';
    var jsonArr = [];
    var json = ('('+jsonS+')');
    jsonArr = json;
    ==>  [{name:"tom",age:21},{name:"Lily",age:22},{name:"John",age:23}]

      4.另外如果使用extjs插件的话,可以使用:

        Ext.decode()将字符串转化成对象

        Ext.encode()将json对象转化成字符串

      5.如果要将获取的json对象组合成对象数组的话,直接定义一个数组,然后push一个个json对象即可

    var jsonA = [];
    jsonA.push({name:"milk",amount:100,color:"white"});
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  • 原文地址:https://www.cnblogs.com/0519xf/p/6229480.html
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