js把字符串(yyyymmdd)转换成日期格式（yyyy-mm-dd）

1.javascript var r="20112233".replace(/^(\d{4})(\d{2})(\d{2})$/, "$1-$2-$3") console.log(r) 2.java var dateString = '19930701'; var pattern = /(\d{4})(\d{2})(\d{2})/; var formatedDate = dateString.rep

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