Jquery版json_encode

有时候我们想传个数组到后端又要保持对应关系感觉特别麻烦，一般是通过分隔符拼接字符串，

在这里可以实现一个JS版本的json_encode 能像php那样将一个数组转成一个Json字符串，然后方便传到后端

代码如下：$.toJSON = typeof JSON === 'object' && JSON.stringify
? JSON.stringify
: function(o) {
if (o === null) {
return 'null';
}
var type = typeof o;
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 $.toJSON(o.toJSON());
}
if (o.constructor === Date) {
var month = o.getUTCMonth() + 1, day = o.getUTCDate(), year = o
.getUTCFullYear(), hours = o.getUTCHours(), minutes = o
.getUTCMinutes(), seconds = o.getUTCSeconds(), milli = o
.getUTCMilliseconds();
if (month < 10) {
month = '0' + month;
}
if (day < 10) {
day = '0' + day;
}
if (hours < 10) {
hours = '0' + hours;
}
if (minutes < 10) {
minutes = '0' + minutes;
}
if (seconds < 10) {
seconds = '0' + seconds;
}
if (milli < 100) {
milli = '0' + milli;
}
if (milli < 10) {
milli = '0' + milli;
}
return '"' + year + '-' + month + '-' + day + 'T'
+ hours + ':' + minutes + ':' + seconds + '.'
+ milli + 'Z"';
}
if (o.constructor === Array) {
var ret = [];
for (var i = 0; i < o.length; i++) {
ret.push($.toJSON(o[i]) || 'null');
}
return '[' + ret.join(',') + ']';
}
var name, val, pairs = [];
for (var k in o) {
type = typeof k;
if (type === 'number') {
name = '"' + k + '"';
} else if (type === 'string') {
name = $.quoteString(k);
} else {
// Keys must be numerical or string. Skip others
continue;
}
type = typeof o[k];
if (type === 'function' || type === 'undefined') {
// Invalid values like these return undefined
// from toJSON, however those object members
// shouldn't be included in the JSON string at all.
continue;
}
val = $.toJSON(o[k]);
pairs.push(name + ':' + val);
}
return '{' + pairs.join(',') + '}';
}
};
/**
* jQuery.evalJSON Evaluates a given piece of json source.
*
* @param src
* {String}
*/
$.evalJSON = typeof JSON === 'object' && JSON.parse
? JSON.parse
: function(src) {
return eval('(' + src + ')');
};
/**
* jQuery.secureEvalJSON Evals JSON in a way that is *more* secure.
*
* @param src
* {String}
*/
$.secureEvalJSON = typeof JSON === 'object' && JSON.parse
? JSON.parse
: function(src) {
var filtered = src
.replace(/\\["\\\/bfnrtu]/g, '@')
.replace(
/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,
']').replace(/(?:^|:|,)(?:\s*\[)+/g, '');
if (/^[\],:{}\s]*$/.test(filtered)) {
return eval('(' + src + ')');
} else {
throw new SyntaxError('Error parsing JSON, source is not valid.');
}
};
/**
* jQuery.quoteString 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 + '"';
};
$.json_encode = $.toJSON;
$.json_decode = $.evalJSON;