如何构造一个 LocalDateTime()

// 2024-04-21 17:59:12.798486200 执行如下代码
LocalDate.now());                    //2022-04-03

LocalDate.of(2019, 7, 7));           //2019-07-07
LocalDate.of(2019, Month.JULY, 7));  //2019-07-07

ZonedDateTime ZONED_DATE_TIME = ZonedDateTime.of(2019, 7, 7, 20, 18, 18, 888, ZoneId.of("Asia/Tokyo"));
OffsetDateTime OFFSET_DATE_TIME = OffsetDateTime.of(2019, 7, 7, 20, 18, 18, 888, ZoneOffset.ofHours(9));
LocalDateTime LOCAL_DATE_TIME = LocalDateTime.of(2019, 7, 7, 20, 18, 18, 888);
LOCAL_DATE_TIME.toLocalDate());      //2019-07-07
OFFSET_DATE_TIME.toLocalDate());     //2019-07-07
ZONED_DATE_TIME.toLocalDate());      //2019-07-07

// 2024-04-21 17:59:12.798486200 执行如下代码
LocalTime.now());               //17:59:12.798486200

LocalTime.of(20, 18));          //20:18
LocalTime.of(20, 18, 18));      //20:18:18
LocalTime.of(20, 18, 18, 888)); //20:18:18.000000888

ZonedDateTime ZONED_DATE_TIME = ZonedDateTime.of(2019, 7, 7, 20, 18, 18, 888, ZoneId.of("Asia/Tokyo"));
OffsetDateTime OFFSET_DATE_TIME = OffsetDateTime.of(2019, 7, 7, 20, 18, 18, 888, ZoneOffset.ofHours(9));
LocalDateTime LOCAL_DATE_TIME = LocalDateTime.of(2019, 7, 7, 20, 18, 18, 888);
LOCAL_DATE_TIME.toLocalTime());   //20:18:18.000000888
OFFSET_DATE_TIME.toLocalTime());  //20:18:18.000000888
ZONED_DATE_TIME.toLocalTime());   //20:18:18.000000888

// 2024-04-21 17:59:12.798486200 执行如下代码
LocalDateTime.now());                                      //2022-04-03T17:30:32.193733700  【当前时区】

LocalDateTime.of(2019, 7, 7, 20, 18, 18, 888));            //2019-07-07T20:18:18.000000888  【当前时区】
LocalDateTime.of(2019, 7, 7, 20, 18, 18));                 //2019-07-07T20:18:18            【当前时区】
LocalDateTime.of(2019, 7, 7, 20, 18));                     //2019-07-07T20:18               【当前时区】
LocalDateTime.of(2019, Month.JULY, 7, 20, 18, 18, 888));   //2019-07-07T20:18:18.000000888  【当前时区】
LocalDateTime.of(2019, Month.JULY, 7, 20, 18, 18));        //2019-07-07T20:18:18            【当前时区】
LocalDateTime.of(2019, Month.JULY, 7, 20, 18));            //2019-07-07T20:18               【当前时区】

LocalDateTime.of(LocalDate.of(2019, 7, 7), LocalTime.of(20, 18,18,888)));  //2019-07-07T20:18:18.000000888  【当前时区】
LocalDateTime.of(LocalDate.of(2019, 7, 7), LocalTime.of(20, 18,18)));      //2019-07-07T20:18:18            【当前时区】       
LocalDateTime.of(LocalDate.of(2019, 7, 7), LocalTime.of(20, 18)));         //2019-07-07T20:18               【当前时区】

LocalDateTime.ofEpochSecond(1562501898,888888888, ZoneOffset.UTC));         //2019-07-07T12:18:18.888888888  【显示指定时区时间格式】
LocalDateTime.ofEpochSecond(1562501898,888888888, ZoneOffset.ofHours(8)));  //2019-07-07T20:18:18.888888888  【显示指定时区时间格式】

LocalDateTime.ofInstant(Instant.parse("2019-07-07T20:18:18.000000888Z"), ZoneId.of("UTC")));     //2019-07-07T20:18:18.000000888  【显示指定时区时间格式】
LocalDateTime.ofInstant(Instant.parse("2019-07-07T20:18:18.000000888Z"), ZoneId.of("+08:00")));  //2019-07-08T04:18:18.000000888  【显示指定时区时间格式】

ZonedDateTime ZONED_DATE_TIME = ZonedDateTime.of(2019, 7, 7, 20, 18, 18, 888, ZoneId.of("Asia/Tokyo"));
OffsetDateTime OFFSET_DATE_TIME = OffsetDateTime.of(2019, 7, 7, 20, 18, 18, 888, ZoneOffset.ofHours(9));
LocalDateTime LOCAL_DATE_TIME = LocalDateTime.of(2019, 7, 7, 20, 18, 18, 888);
Date DATE = new Date(1562501898888L);    // Sun Jul 07 20:18:18 CST 2019

DATE.toInstant().atZone(ZoneId.of("+09:00")).toLocalDateTime());  //2019-07-07T21:18:18            【对应时区本地时间】
OFFSET_DATE_TIME.toLocalDateTime());                              //2019-07-07T20:18:18.000000888  【对应时区本地时间】
ZONED_DATE_TIME.toLocalDateTime());                               //2019-07-07T20:18:18.000000888  【对应时区本地时间】

LocalDateTime.parse("2022-04-03T18:00"));                 //2022-04-03T18:00

DateTimeFormatter df = DateTimeFormatter.ofPattern("第Q季度 yyyy-MM-dd HH:mm:ss", Locale.JAPAN);
LocalDateTime.parse("第3季度 2019-07-07 20:18:18",df));   //2019-07-07T20:18:18
DateTimeFormatter df1 = DateTimeFormatter.ofPattern("第Q季度 yyyy-MM-dd HH:mm:ss", Locale.CHINA);
LocalDateTime.parse("第3季度 2019-07-07 20:18:18",df1));  //2019-07-07T20:18:18

LocalDateTime.parse("2019-07-07T20:18:18.000000888"));    //2019-07-07T20:18:18.000000888
LocalDateTime.parse("2019-07-07T20:18:18"));              //2019-07-07T20:18:18
LocalDateTime.parse("2019-07-07T20:18"));                 //2019-07-07T20:18