将js对象转换为json字符串
//将js对象转换为json字符串function obj2str(o){ var r = []; if(typeof o =="string") return "\""+o.replace(/([\'\"\\])/g,"\\$1").replace(/(\n)/g," \\n").replace(/(\r)/g,"\\r").replace(/(\t)/g,"\\t")+"\""; if(typeof o =="undefined") return ""; if(typeof o == "object"){ if(o===null) return "null"; else if(!o.sort){ for(var i in o){ r.push("\""+i+"\":"+obj2str(o)) } r="{"+r.join()+"}" }else{ for(var i =0;i<o.length;i++) r.push(obj2str(o)) r="["+r.join()+"]" } return r; } return o.toString();}
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