From cd53fa84aab076fab02b8f192ffc2e87bee6f81b Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Thu, 30 Jul 2026 10:47:37 +0800
Subject: [PATCH] =?UTF-8?q?s-day01-LocalDateTime=E7=B1=BB=E7=9A=84?=
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---
 .../jdk8_date05/LocalDateTimeDemo11.java      | 69 +++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 s-day01/src/com/inmind/jdk8_date05/LocalDateTimeDemo11.java

diff --git a/s-day01/src/com/inmind/jdk8_date05/LocalDateTimeDemo11.java b/s-day01/src/com/inmind/jdk8_date05/LocalDateTimeDemo11.java
new file mode 100644
index 0000000..9d7ef89
--- /dev/null
+++ b/s-day01/src/com/inmind/jdk8_date05/LocalDateTimeDemo11.java
@@ -0,0 +1,69 @@
+package com.inmind.jdk8_date05;
+
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.LocalTime;
+
+/*
+LocalDateTime类的基本使用（重点学习）
+LocalDateTime就是LocalDate和LocalTime的组合，它们是可以互相转换的
+
+ */
+public class LocalDateTimeDemo11 {
+    public static void main(String[] args) {
+        // 0、获取本地日期和时间对象。
+        LocalDateTime ldt = LocalDateTime.now(); // 年 月 日 时 分 秒 纳秒
+        System.out.println(ldt);
+
+        // 1、可以获取日期和时间的全部信息
+        int year = ldt.getYear(); // 年
+        int month = ldt.getMonthValue(); // 月
+        int day = ldt.getDayOfMonth(); // 日
+        int dayOfYear = ldt.getDayOfYear();  // 一年中的第几天
+        int dayOfWeek = ldt.getDayOfWeek().getValue();  // 获取是周几
+        int hour = ldt.getHour(); //时
+        int minute = ldt.getMinute(); //分
+        int second = ldt.getSecond(); //秒
+        int nano = ldt.getNano(); //纳秒
+
+        // 2、修改时间信息：
+        // withYear withMonth withDayOfMonth withDayOfYear withHour
+        // withMinute withSecond withNano
+        LocalDateTime ldt2 = ldt.withYear(2029);
+        LocalDateTime ldt3 = ldt.withMinute(59);
+
+        // 3、加多少:
+        // plusYears  plusMonths plusDays plusWeeks plusHours plusMinutes plusSeconds plusNanos
+        LocalDateTime ldt4 = ldt.plusYears(2);
+        LocalDateTime ldt5 = ldt.plusMinutes(3);
+
+        // 4、减多少：
+        // minusDays minusYears minusMonths minusWeeks minusHours minusMinutes minusSeconds minusNanos
+        LocalDateTime ldt6 = ldt.minusYears(2);
+        LocalDateTime ldt7 = ldt.minusMinutes(3);
+
+
+        // 5、获取指定日期和时间的LocalDateTime对象：
+        // public static LocalDateTime of(int year, Month month, int dayOfMonth, int hour,
+        //                                  int minute, int second, int nanoOfSecond)
+        LocalDateTime ldt8 = LocalDateTime.of(2029, 12, 12, 12, 12, 12, 1222);
+        LocalDateTime ldt9 = LocalDateTime.of(2029, 12, 12, 12, 12, 12, 1222);
+
+        // 6、 判断2个日期、时间对象，是否相等，在前还是在后： equals、isBefore、isAfter
+        System.out.println(ldt9.equals(ldt8));
+        System.out.println(ldt9.isAfter(ldt));
+        System.out.println(ldt9.isBefore(ldt));
+
+        // 7、可以把LocalDateTime转换成LocalDate和LocalTime
+        // public LocalDate toLocalDate()
+        // public LocalTime toLocalTime()
+        // public static LocalDateTime of(LocalDate date, LocalTime time)
+        LocalDate ld = ldt.toLocalDate();
+        LocalTime lt = ldt.toLocalTime();
+        System.out.println(ld);
+        System.out.println(lt);
+        LocalDateTime ldt10 = LocalDateTime.of(ld, lt);
+        System.out.println(ldt10);
+
+    }
+}