java.time.LocalDate.atStartOfDay() 方法示例 java.time.LocalDate.adjustInto() 方法示例 java.time.LocalDate.atStartOfDay(ZoneId zone) java.time.LocalDate.atStartOfDay() 方法示例 package com.codingdict; import java.time.LocalDate; import java.time.LocalDateTime; public class LocalDateDemo { public static void main(String[] args) { LocalDate date = LocalDate.parse("2017-02-03"); System.out.println(date); LocalDateTime date1 = date.atStartOfDay(); System.out.println(date1); } } java.time.LocalDate.adjustInto() 方法示例 java.time.LocalDate.atStartOfDay(ZoneId zone)