String转LocalDateTime报错

一 问题描述

根据网上的办法，将String转成LocalDateTime，出现下面情况：

DateTimeFormatter df = DateTimeFormatter.ofPattern("yyyyMMdd");
LocalDateTime ldt = LocalDateTime.parse("20191201",df);
LocalDateTime ldt2 = LocalDateTime.parse("20191222", df);

二 解决办法

DateTimeFormatter df = DateTimeFormatter.ofPattern("yyyyMMdd");
LocalDateTime ldt = LocalDateTime.from(LocalDate.parse("20191201",df).atStartOfDay());
LocalDateTime ldt2 = LocalDateTime.from(LocalDate.parse("20191222",df).atStartOfDay());