详解Java中Duration类的使用方法

Duration fromDays = Duration.ofDays(1);

LocalDateTime start = LocalDateTime.of(2022, 1, 1, 8, 0, 0);
LocalDateTime end = LocalDateTime.of(2022, 1, 2, 8, 30, 30);
 
Duration duration = Duration.between(start, end);

Duration du1 = Duration.ofHours(10);
Duration duration = Duration.from(du1);

Duration fromChar1 = Duration.parse(\"P1DT1H10M10.5S\");
Duration fromChar2 = Duration.parse(\"PT10M\");

public final class Duration
        implements TemporalAmount, Comparable, Serializable {
		
	//其他代码
	
    //-----------------------------------------------------------------------
    /**
     * Obtains a {@code Duration} from a text string such as {@code PnDTnHnMn.nS}.
     * 

     * This will parse a textual representation of a duration, including the
     * string produced by {@code toString()}. The formats accepted are based
     * on the ISO-8601 duration format {@code PnDTnHnMn.nS} with days
     * considered to be exactly 24 hours.
     * 

     * The string starts with an optional sign, denoted by the ASCII negative
     * or positive symbol. If negative, the whole period is negated.
     * The ASCII letter \"P\" is next in upper or lower case.
     * There are then four sections, each consisting of a number and a suffix.
     * The sections have suffixes in ASCII of \"D\", \"H\", \"M\" and \"S\" for
     * days, hours, minutes and seconds, accepted in upper or lower case.
     * The suffixes must occur in order. The ASCII letter \"T\" must occur before
     * the first occurrence, if any, of an hour, minute or second section.
     * At least one of the four sections must be present, and if \"T\" is present
     * there must be at least one section after the \"T\".
     * The number part of each section must consist of one or more ASCII digits.
     * The number may be prefixed by the ASCII negative or positive symbol.
     * The number of days, hours and minutes must parse to an {@code long}.
     * The number of seconds must parse to an {@code long} with optional fraction.
     * The decimal point may be either a dot or a comma.
     * The fractional part may have from zero to 9 digits.
     * 

     * The leading plus/minus sign, and negative values for other units are
     * not part of the ISO-8601 standard.
     * 

     * Examples:
     * 
     *    \"PT20.345S\" -- parses as \"20.345 seconds\"
     *    \"PT15M\"     -- parses as \"15 minutes\" (where a minute is 60 seconds)
     *    \"PT10H\"     -- parses as \"10 hours\" (where an hour is 3600 seconds)
     *    \"P2D\"       -- parses as \"2 days\" (where a day is 24 hours or 86400 seconds)
     *    \"P2DT3H4M\"  -- parses as \"2 days, 3 hours and 4 minutes\"
     *    \"P-6H3M\"    -- parses as \"-6 hours and +3 minutes\"
     *    \"-P6H3M\"    -- parses as \"-6 hours and -3 minutes\"
     *    \"-P-6H+3M\"  -- parses as \"+6 hours and -3 minutes\"
     * 
     *
     * @param text  the text to parse, not null
     * @return the parsed duration, not null
     * @throws DateTimeParseException if the text cannot be parsed to a duration
     */
    public static Duration parse(CharSequence text) {
		......
	}
}

Instant start = Instant.parse(\"2017-10-03T10:15:30.00Z\");
Instant end = Instant.parse(\"2017-10-03T10:16:30.00Z\");
 
// start - end         
Duration duration = Duration.between(start, end);
 
// 任何一个时间单元为负数，则返回true。true：end早于start
duration.isNegative();
 
Duration.between(start, end).getSeconds();
Duration.between(start, end).getNano();

Duration duration = Duration.ofHours(2);
Duration newDuration = duration.plusSeconds(33);

Duration duration = Duration.ofHours(2);
Duration newDuration = duration.plus(33, ChronoUnit.SECONDS);

Duration duration = Duration.ofHours(2);
 
duration.toDays();     // 0
duration.toHours();    // 2
duration.toMinutes();  // 120
duration.toMillis();   // 7200000
duration.toNanos();    // 7200000000000

Duration duration = Duration.ofHours(2);
 
duration.getSeconds();  //7200
duration.getNano();     //