我需要将一个对象序列化为JSON。我用的是jQuery。是否有一个“标准”的方法来做到这一点?
我的具体情况:我有一个数组定义如下所示:
var countries = new Array();
countries[0] = 'ga';
countries[1] = 'cd';
...
我需要把它变成一个字符串传递给$.ajax()像这样:
$.ajax({
type: "POST",
url: "Concessions.aspx/GetConcessions",
data: "{'countries':['ga','cd']}",
...
当前回答
基本上分为两步:
首先，你需要像这样进行字符串化:
var JSON_VAR = JSON.stringify(OBJECT_NAME, null, 2);
之后，你需要将字符串转换为Object:
var obj = JSON.parse(JSON_VAR);
其他回答
最好的方法是包含JSON对象的填充。
但是如果你坚持在jQuery命名空间中创建一个方法来将对象序列化为JSON符号(JSON的有效值)，你可以这样做:
实现
// This is a reference to JSON.stringify and provides a polyfill for old browsers.
// stringify serializes an object, array or primitive value and return it as JSON.
jQuery.stringify = (function ($) {
var _PRIMITIVE, _OPEN, _CLOSE;
if (window.JSON && typeof JSON.stringify === "function")
return JSON.stringify;
_PRIMITIVE = /string|number|boolean|null/;
_OPEN = {
object: "{",
array: "["
};
_CLOSE = {
object: "}",
array: "]"
};
//actions to execute in each iteration
function action(key, value) {
var type = $.type(value),
prop = "";
//key is not an array index
if (typeof key !== "number") {
prop = '"' + key + '":';
}
if (type === "string") {
prop += '"' + value + '"';
} else if (_PRIMITIVE.test(type)) {
prop += value;
} else if (type === "array" || type === "object") {
prop += toJson(value, type);
} else return;
this.push(prop);
}
//iterates over an object or array
function each(obj, callback, thisArg) {
for (var key in obj) {
if (obj instanceof Array) key = +key;
callback.call(thisArg, key, obj[key]);
}
}
//generates the json
function toJson(obj, type) {
var items = [];
each(obj, action, items);
return _OPEN[type] + items.join(",") + _CLOSE[type];
}
//exported function that generates the json
return function stringify(obj) {
if (!arguments.length) return "";
var type = $.type(obj);
if (_PRIMITIVE.test(type))
return (obj === null ? type : obj.toString());
//obj is array or object
return toJson(obj, type);
}
}(jQuery));
使用
var myObject = {
"0": null,
"total-items": 10,
"undefined-prop": void(0),
sorted: true,
images: ["bg-menu.png", "bg-body.jpg", [1, 2]],
position: { //nested object literal
"x": 40,
"y": 300,
offset: [{ top: 23 }]
},
onChange: function() { return !0 },
pattern: /^bg-.+\.(?:png|jpe?g)$/i
};
var json = jQuery.stringify(myObject);
console.log(json);
我已经使用jquery-json 6个月了，它工作得很好。使用起来非常简单:
var myObj = {foo: "bar", "baz": "wockaflockafliz"};
$.toJSON(myObj);
// Result: {"foo":"bar","baz":"wockaflockafliz"}
我确实在某个地方找到了这个。但不记得在哪里了……可能在StackOverflow:)
$.fn.serializeObject = function(){
var o = {};
var a = this.serializeArray();
$.each(a, function() {
if (o[this.name]) {
if (!o[this.name].push) {
o[this.name] = [o[this.name]];
}
o[this.name].push(this.value || '');
} else {
o[this.name] = this.value || '';
}
});
return o;
};
基本上分为两步:
首先，你需要像这样进行字符串化:
var JSON_VAR = JSON.stringify(OBJECT_NAME, null, 2);
之后，你需要将字符串转换为Object:
var obj = JSON.parse(JSON_VAR);
是的，您应该使用JSON。stringify和JSON。在调用$.ajax之前解析Json_PostData:
$.ajax({
url: post_http_site,
type: "POST",
data: JSON.parse(JSON.stringify(Json_PostData)),
cache: false,
error: function (xhr, ajaxOptions, thrownError) {
alert(" write json item, Ajax error! " + xhr.status + " error =" + thrownError + " xhr.responseText = " + xhr.responseText );
},
success: function (data) {
alert("write json item, Ajax OK");
}
});
