Question

如何用正则表达式更改时间格式

目前返回的时间是20180823103000 - 20180823113000
现在希望替换成：2018-08-23 10:30:00

Answer 1

匹配正则：(\d{4})(\d{2})(\d{2})(\d{2})(\d{2})(\d{2})

替换语句：$1-$2-$3 $4:$5:$6

java测试代码示例：

public class Demo {
    public static void main(String[] args) {
        String time = "20180823103000";

        String newTime = time.replaceAll("(\\d{4})(\\d{2})(\\d{2})(\\d{2})(\\d{2})(\\d{2})", "$1-$2-$3 $4:$5:$6");

        System.out.println(newTime);

    }
}