JavaScript对象转换成JSON字符串及深度克隆方法
转自:http://snippets.dzone.com/posts/show/749
实现代码:
Object.prototype.deep_clone = function(){
eval("var tmp = " + this.toJSON());
return tmp;
}
Object.prototype.toJSON = function(){
var json = [];
for(var i in this){
if(!this.hasOwnProperty(i)) continue;
//if(typeof this[i] == "function") continue;
json.push(
i.toJSON() + " : " +
((this[i] != null) ? this[i].toJSON() : "null")
)
}
return "{\n " + json.join(",\n ") + "\n}";
}
Array.prototype.toJSON = function(){
for(var i=0,json=[];i<this.length;i++)
json[i] = (this[i] != null) ? this[i].toJSON() : "null";
return "["+json.join(", ")+"]"
}
String.prototype.toJSON = function(){
return '"' +
this.replace(/(\\|\")/g,"\\$1")
.replace(/\n|\r|\t/g,function(){
var a = arguments[0];
return (a == '\n') ? '\\n':
(a == '\r') ? '\\r':
(a == '\t') ? '\\t': ""
}) +
'"'
}
Boolean.prototype.toJSON = function(){return this}
Function.prototype.toJSON = function(){return this}
Number.prototype.toJSON = function(){return this}
RegExp.prototype.toJSON = function(){return this}
// strict but slow
String.prototype.toJSON = function(){
var tmp = this.split("");
for(var i=0;i<tmp.length;i++){
var c = tmp[i];
(c >= ' ') ?
(c == '\\') ? (tmp[i] = '\\\\'):
(c == '"') ? (tmp[i] = '\\"' ): 0 :
(tmp[i] =
(c == '\n') ? '\\n' :
(c == '\r') ? '\\r' :
(c == '\t') ? '\\t' :
(c == '\b') ? '\\b' :
(c == '\f') ? '\\f' :
(c = c.charCodeAt(),('\\u00' + ((c>15)?1:0)+(c%16)))
)
}
return '"' + tmp.join("") + '"';
}
Object.prototype.deep_clone = function(){ eval("var tmp = " + this.toJSON()); return tmp; } Object.prototype.toJSON = function(){ var json = []; for(var i in this){ if(!this.hasOwnProperty(i)) continue; //if(typeof this[i] == "function") continue; json.push( i.toJSON() + " : " + ((this[i] != null) ? this[i].toJSON() : "null") ) } return "{\n " + json.join(",\n ") + "\n}"; } Array.prototype.toJSON = function(){ for(var i=0,json=[];i<this.length;i++) json[i] = (this[i] != null) ? this[i].toJSON() : "null"; return "["+json.join(", ")+"]" } String.prototype.toJSON = function(){ return '"' + this.replace(/(\\|\")/g,"\\$1") .replace(/\n|\r|\t/g,function(){ var a = arguments[0]; return (a == '\n') ? '\\n': (a == '\r') ? '\\r': (a == '\t') ? '\\t': "" }) + '"' } Boolean.prototype.toJSON = function(){return this} Function.prototype.toJSON = function(){return this} Number.prototype.toJSON = function(){return this} RegExp.prototype.toJSON = function(){return this} // strict but slow String.prototype.toJSON = function(){ var tmp = this.split(""); for(var i=0;i<tmp.length;i++){ var c = tmp[i]; (c >= ' ') ? (c == '\\') ? (tmp[i] = '\\\\'): (c == '"') ? (tmp[i] = '\\"' ): 0 : (tmp[i] = (c == '\n') ? '\\n' : (c == '\r') ? '\\r' : (c == '\t') ? '\\t' : (c == '\b') ? '\\b' : (c == '\f') ? '\\f' : (c = c.charCodeAt(),('\\u00' + ((c>15)?1:0)+(c%16))) ) } return '"' + tmp.join("") + '"'; }
测试:
str : "abcde",
num : 6,
reg : /foobar/i,
array : [1,2,3,4,5],
func : function(x,y){return x+y},
obj : {a : "b"}
}.toJSON();
alert(json);
// result
{
"str" : "abcde",
"num" : 6,
"reg" : /foobar/i,
"array" : [1, 2, 3, 4, 5],
"func" : function(x,y){return x+y},
"obj" : {
"a" : "b"
}
}
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