SyntaxError: Unexpected number in JSON at position 1

SyntaxError: Unexpected number in JSON at position 1

javascript JSON序列表，key 是int类型的时候，出错

处理方法,使用正则表达式，将int类型的key 替换成字符串

var a  ="{2:\"全天\",7:\"测试\",8:\"1天\",9:12,10:14}";
var x = a.replace(/(\d+):/g,"\"$1\":");
var r  = JSON.parse(x);
console.log(r["8"])