Date Time Java API Series 14 ----- Jdk8 in java.time package of the new date and time API classes, java date calculation 1, to obtain the date when minutes and seconds, etc.

　　By LocalDate source code analysis Java API Date Time Series 8 ----- Jdk8 new date and time API class java.time package  , it can be seen java8 design is very good, implement the interface Temporal, TemporalAdjuster, ChronoLocalDate, etc., we have a very rich way. For example: the LocalDateTime: Method part:

　　

 

It contains the acquisition date, minutes and seconds nanoseconds. Date if you want to get this information, you must use the Calendar can. Now thread-safe acquisition date, hour, minute, and other information by Date converted to LocalDateTime, it can be very convenient.

    public static int getYear(Date date){
        return DateTimeConverterUtil.toLocalDateTime(date).getYear();
    }
    
    public static int getYear(Instant instant){
        return DateTimeConverterUtil.toLocalDateTime(instant).getYear();
    }
    
    public static int getMonth(Date date){
        return DateTimeConverterUtil.toLocalDateTime(date).getMonthValue();
    }
    
    public static int getMonth(Instant instant){
        return DateTimeConverterUtil.toLocalDateTime(instant).getMonthValue();
    }
    
    public static int getDayOfMonth(Date date){
        return DateTimeConverterUtil.toLocalDateTime(date).getDayOfMonth();
    }
    
    public static int getDayOfMonth(Instant instant){
        return DateTimeConverterUtil.toLocalDateTime(instant).getDayOfMonth();
    }    
    
    public static int getHour(Date date){
        return DateTimeConverterUtil.toLocalDateTime(date).getHour();
    }
    
    public static int getHour(Instant instant){
        return DateTimeConverterUtil.toLocalDateTime(instant).getHour();
    }    
    
    public static int getMinute(Date date){
        return DateTimeConverterUtil.toLocalDateTime(date).getMinute();
    }
    
    public static int getMinute(Instant instant){
        return DateTimeConverterUtil.toLocalDateTime(instant).getMinute();
    }    
    
    public static int getSecond(Date date){
        return DateTimeConverterUtil.toLocalDateTime(date).getSecond();
    }
    
    public static int getSecond(Instant instant){
        return DateTimeConverterUtil.toLocalDateTime(instant).getSecond();
    }

 

Test categories:

    @Test
    public void dateCalculatorGetTest(){
        Date date = new Date();
        System.out.println(date);
        System.out.println(DateTimeConverterUtil.toLocalDateTime(date));
        System.out.println(DateTimeCalculatorUtil.getYear(date));
        System.out.println(DateTimeCalculatorUtil.getMonth(date));
        System.out.println(DateTimeCalculatorUtil.getDayOfMonth(date));
        System.out.println(DateTimeCalculatorUtil.getHour(date));
        System.out.println(DateTimeCalculatorUtil.getMinute(date));
        System.out.println(DateTimeCalculatorUtil.getSecond(date));
    }

 

Output:

Sun Jan 12 22:24:07 CST 2020
2020-01-12T22:24:07.681
2020
1
12
22
24
7

 

Source address: https://github.com/xkzhangsan/xk-time