如何从文本中获取JSON数据？

Question

我有一根绳子，就像这样：

sometext{"points":{"point":{"lat":"55.68705772049725"，"lon":"21.127218855544925"}，{"lat":"55.68714472465217"，"lon":"21.127141742035747"}，{"lat":"55.6871934235096"，"lon":"21.12712439149618"}，{"lat":"55.68733625113964"，"lon":"21.127151465043426"}，{"lat":"55.68751168437302"，"lon":"21.12717761658132"}，}{"lat":"55.687646800652146"，"lon":"21.127120200544596"}，{"lat":"55.68781033158302"，"lon":"21.127034788951278"}，{"lat":"55.687981490045786"，“lon”：“lon”}

是否有可能在regex提取JSON中使用Javascript？

P.S.我得到了很多数据并把它加入到字符串中。因此，我需要从该字符串中获取json，因为可以有第一对象的结尾和其他对象的开头。

Answer 1

假设在JSON部分之外没有大括号，并且假设编码的是一个对象(而不是数组)，那么您可以这样做

var obj = JSON.parse(s.match(/({.*})/)[1]);

如果在外部有大括号，就必须寻找一种更可靠的方法来检测JSON部分的开始和结束。

Answer 2

var str = 'sometext{"points":{"point":[{"lat":"55.68705772049725","lon":"21.127218855544925"},{"lat":"55.68714472465217","lon":"21.127141742035747"},{"lat":"55.6871934235096","lon":"21.12712439149618"},{"lat":"55.68733625113964","lon":"21.127151465043426"},{"lat":"55.68751168437302","lon":"21.12717761658132"},{"lat":"55.687646800652146","lon":"21.127120200544596"},{"lat":"55.68781033158302","lon":"21.127034788951278"},{"lat":"55.687981490045786","lon":"21.12691568210721"}]}}sometext';

var object = JSON.parse(str.match(/({.*})/).pop());