关于javascriptjson的信息
如何将 javascript 对象转换成 json字符串
javascript 对象转换成 json字符串[js对象转换成json字符串]
使用$.toJSON(Object)就可以转换了，转换之前先引入jquery.json.js
/*
* jQuery JSON Plugin
* version: 2.1 (2009-08-14)
*
* This document is licensed as free software under the terms of the
* MIT License:
*
* Brantley Harris wrote this plugin. It is based somewhat on the JSON.org
* website's , which proclaims:
* "NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.", a sentiment that
* I uphold.
*
* It is also influenced heavily by MochiKit's serializeJSON, which is
* copyrighted 2005 by Bob Ippolito.
*/
(function($) {
/** jQuery.toJSON( json-serializble )
Converts the given argument into a JSON respresentation.
If an object has a "toJSON" function, that will be used to get the representation.
Non-integer/string keys are skipped in the object, as are keys that point to a function.
json-serializble:
The *thing* to be converted.
**/
$.toJSON = function(o)
{
if (typeof(JSON) == 'object' JSON.stringify)
return JSON.stringify(o);
var type = typeof(o);
if (o === null)
return "null";
if (type == "undefined")
return undefined;
if (type == "number" || type == "boolean")
return o + "";
if (type == "string")
return $.quoteString(o);
if (type == 'object')
{
if (typeof o.toJSON == "function")
return $.toJSON( o.toJSON() );
if (o.constructor === Date)
{
var month = o.getUTCMonth() + 1;
if (month 10) month = '0' + month;
var day = o.getUTCDate();
if (day 10) day = '0' + day;
var year = o.getUTCFullYear();
var hours = o.getUTCHours();
if (hours 10) hours = '0' + hours;
var minutes = o.getUTCMinutes();
if (minutes 10) minutes = '0' + minutes;
var seconds = o.getUTCSeconds();
if (seconds 10) seconds = '0' + seconds;
var milli = o.getUTCMilliseconds();
if (milli 100) milli = '0' + milli;
if (milli 10) milli = '0' + milli;
return '"' + year + '-' + month + '-' + day + 'T' +
hours + ':' + minutes + ':' + seconds +
'.' + milli + 'Z"';
}
if (o.constructor === Array)
{
var ret = [];
for (var i = 0; i o.length; i++)
ret.push( $.toJSON(o[i]) || "null" );
return "[" + ret.join(",") + "]";
}
var pairs = [];
for (var k in o) {
var name;
var type = typeof k;
if (type == "number")
name = '"' + k + '"';
else if (type == "string")
name = $.quoteString(k);
else
continue; //skip non-string or number keys
if (typeof o[k] == "function")
continue; //skip pairs where the value is a function.
var val = $.toJSON(o[k]);
pairs.push(name + ":" + val);
}
return "{" + pairs.join(", ") + "}";
}
};
/** jQuery.evalJSON(src)
Evaluates a given piece of json source.
**/
$.evalJSON = function(src)
{
if (typeof(JSON) == 'object' JSON.parse)
return JSON.parse(src);
return eval("(" + src + ")");
};
/** jQuery.secureEvalJSON(src)
Evals JSON in a way that is *more* secure.
**/
$.secureEvalJSON = function(src)
{
if (typeof(JSON) == 'object' JSON.parse)
return JSON.parse(src);
var filtered = src;
filtered = filtered.replace(/\\["\\\/bfnrtu]/g, '@');
filtered = filtered.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']');
filtered = filtered.replace(/(?:^|:|,)(?:\s*\[)+/g, '');
if (/^[\],:{}\s]*$/.test(filtered))
return eval("(" + src + ")");
else
throw new SyntaxError("Error parsing JSON, source is not valid.");
};
/** jQuery.quoteString(string)
Returns a string-repr of a string, escaping quotes intelligently.
Mostly a support function for toJSON.
Examples:
jQuery.quoteString("apple")
"apple"
jQuery.quoteString('"Where are we going?", she asked.')
"\"Where are we going?\", she asked."
**/
$.quoteString = function(string)
{
if (string.match(_escapeable))
{
return '"' + string.replace(_escapeable, function (a)
{
var c = _meta[a];
if (typeof c === 'string') return c;
c = a.charCodeAt();
return '\\u00' + Math.floor(c / 16).toString(16) + (c % 16).toString(16);
}) + '"';
}
return '"' + string + '"';
};
var _escapeable = /["\\\x00-\x1f\x7f-\x9f]/g;
var _meta = {
'\b': '\\b',
'\t': '\\t',
'\n': '\\n',
'\f': '\\f',
'\r': '\\r',
'"' : '\\"',
'\\': '\\\\'
};
})(jQuery);
javascript中使用json不需要导包么
不需要导入json包。
JS中，json对象可以通过对象和数组支持创建成json格式。
同时，通过eval方式也可以把json格式的字符串解析成json对象。
所以不需要导入json包。
示例：
1、json创建
var?a=[{k:'1'},{k:'2'}];
2、json解析；
var?a=eval("("+"[{k:'1'},{k:'2'}]"+")");
JS,javascript 如何把普通数组转换成JSON数组
首先说一句~你的数组有语法错误~
而在JS中json是字符串表现形式，你的B显然是个对象，跟json没啥关系的~
所以是在js对象（数组）和json字符串之间转换~
那你的A（js中实例使用Camel规则，所以要写成小写a）就应该写成：
var a = {
name: "XXXX", //属性也是Camel规则
year: 1990,
old: 21
};
然后就是转换问题了，使用JSON类：
var b = JSON.stringify(a); //注意，b是json字符串
如果找不到JSON对象说明你浏览器版本太老
就需要手动引用json类库
请自行百度"json2.js"进行下载并引用
希望对您有帮助~
By Billskate
请问用JavaScript解析JSON的问题
(function($){$.toJSON=function(o)
{if(typeof(JSON)=='object'JSON.stringify)
return JSON.stringify(o);var type=typeof(o);if(o===null)
return"null";if(type=="undefined")
return undefined;if(type=="number"||type=="boolean")
return o+"";if(type=="string")
return $.quoteString(o);if(type=='object')
{if(typeof o.toJSON=="function")
return $.toJSON(o.toJSON());if(o.constructor===Date)
{var month=o.getUTCMonth()+1;if(month10)month='0'+month;var day=o.getUTCDate();if(day10)day='0'+day;var year=o.getUTCFullYear();var hours=o.getUTCHours();if(hours10)hours='0'+hours;var minutes=o.getUTCMinutes();if(minutes10)minutes='0'+minutes;var seconds=o.getUTCSeconds();if(seconds10)seconds='0'+seconds;var milli=o.getUTCMilliseconds();if(milli100)milli='0'+milli;if(milli10)milli='0'+milli;return'"'+year+'-'+month+'-'+day+'T'+
hours+':'+minutes+':'+seconds+'.'+milli+'Z"';}
if(o.constructor===Array)
{var ret=[];for(var i=0;io.length;i++)
ret.push($.toJSON(o[i])||"null");return"["+ret.join(",")+"]";}
var pairs=[];for(var k in o){var name;var type=typeof k;if(type=="number")
name='"'+k+'"';else if(type=="string")
name=$.quoteString(k);else
continue;if(typeof o[k]=="function")
continue;var val=$.toJSON(o[k]);pairs.push(name+":"+val);}
return"{"+pairs.join(", ")+"}";}};$.evalJSON=function(src)
{if(typeof(JSON)=='object'JSON.parse)
return JSON.parse(src);return eval("("+src+")");};$.secureEvalJSON=function(src)
{if(typeof(JSON)=='object'JSON.parse)
return JSON.parse(src);var filtered=src;filtered=filtered.replace(/\\["\\\/bfnrtu]/g,'@');filtered=filtered.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,']');filtered=filtered.replace(/(?:^|:|,)(?:\s*\[)+/g,'');if(/^[\],:{}\s]*$/.test(filtered))
return eval("("+src+")");else
throw new SyntaxError("Error parsing JSON, source is not valid.");};$.quoteString=function(string)
{if(string.match(_escapeable))
{return'"'+string.replace(_escapeable,function(a)
{var c=_meta[a];if(typeof c==='string')return c;c=a.charCodeAt();return'\\u00'+Math.floor(c/16).toString(16)+(c%16).toString(16);})+'"';}
return'"'+string+'"';};var _escapeable=/["\\\x00-\x1f\x7f-\x9f]/g;var _meta={'\b':'\\b','\t':'\\t','\n':'\\n','\f':'\\f','\r':'\\r','"':'\\"','\\':'\\\\'};})(jQuery);
把这段代码拷贝到一个文件里面，存成jquery-json.js，引用后jquery就会扩展出一个toJson的方法
例如var obj = {a:"1",b:"2"};
那么$.toJson(obj) 就是字符串 "{'a':'123','b':'333'}"；
上面的插件是googlecode里面的，不是原创，只不过我发个链接会被百度审核N久，所以直接把人家的代码贴过来了