java8-LocalDate类

LocalDate类使用ISO日历表示年、月、日。

• LocalDate.now(); 获取系统当前日期
• LocalDate.of(int year,int month,int dayOfMonth);
  按指定日期创建LocalDate对象
• getYear(); 返回日期中的年份
• getMonth(); 返回月份
• getDayOfMonth(); 返回月份中的日

1.LocalDate

package com.fantJ.JAVA_8;

import java.time.LocalDate;

public class LocalDate_Test {
    public static void main(String[] args) {
        LocalDate date = LocalDate.now();
        System.out.println(date.getYear()+" "+date.getMonthValue()+" "+date.getDayOfMonth());
        System.out.println(date.toString());
    }
}

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2.LocalTime

public class LocalTime_Test {
    public static void main(String[] args) {
        LocalTime time = LocalTime.now();
        System.out.println(time.getHour()+" "+time.getMinute()+" "+time.getSecond());
        System.out.println(time.toString());
        System.out.println(time.toSecondOfDay());
    }
}

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3.LocalDateTime

public class LocalDateTime_Test {
    public static void main(String[] args) {
        LocalDateTime dateTime = LocalDateTime.now();
        System.out.println(dateTime.getYear()+" "+dateTime.getMonthValue()+" "+dateTime.getDayOfMonth()+
                            dateTime.getHour()+" "+dateTime.getMinute()+" "+dateTime.getSecond());
        System.out.println(dateTime.toString());
    }
}

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4.DateTimeFormatter

用于将字符串解析为日期

public class DateTimeFormatter_Test {
    public static void main(String[] args) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd:HH:mm:ss");
        LocalDateTime dateTime = LocalDateTime.parse("2017-12-15:19:15:01",formatter);
        System.out.println(dateTime.toString());
    }
}

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5.ZonedDateTime

public class ZonedDateTime_Test {
    public static void main(String[] args) {
        ZonedDateTime zonedDateTime = ZonedDateTime.now();
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("MM/dd/yyyy:HH:mm:ss");
        String date = zonedDateTime.format(formatter);
        System.out.println(date);
    }
}

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