java.time.Period#parse ( )源码实例Demo

@Override
protected Period deserialize(String key, DeserializationContext ctxt) throws IOException {
    try {
        return Period.parse(key);
    } catch (DateTimeException e) {
        return _handleDateTimeException(ctxt, Period.class, e, key);
    }
}
 

public static void main(String[] args) {

        Period fromDays = Period.ofDays(120);
        System.out.println("Period from days: " + fromDays);

        Period periodFromUnits = Period.of(2000, 11, 24);
        System.out.println("Period from units: " + periodFromUnits);

        LocalDate localDate = LocalDate.now();
        Period periodFromLocalDate = Period.of(localDate.getYear(),
                localDate.getMonthValue(), localDate.getDayOfMonth());
        System.out.println("Period from LocalDate: " + periodFromLocalDate);

        Period periodFromString = Period.parse("P2019Y2M25D");
        System.out.println("Period from String: " + periodFromString);

        LocalDate startLocalDate = LocalDate.of(2018, 3, 12);
        LocalDate endLocalDate = LocalDate.of(2019, 7, 20);
        Period periodBetween = Period.between(startLocalDate, endLocalDate);
        System.out.println("\nBetween " + startLocalDate + " and "
                + endLocalDate + " there are " + periodBetween.getYears() + " year(s)");
        System.out.println("Between " + startLocalDate + " and "
                + endLocalDate + " there are " + periodBetween.getMonths() + " month(s)");
        System.out.println("Between " + startLocalDate + " and "
                + endLocalDate + " there are " + periodBetween.getDays() + " days(s)");

        System.out.println("Expressed as y:m:d: " + periodToYMD(periodBetween));

        System.out.println(startLocalDate + " is after "
                + endLocalDate + " ? " + periodBetween.isNegative());

        Period periodBetweenPlus1Year = periodBetween.plusYears(1L);
        System.out.println("\n" + periodBetween + " has " + periodBetween.getYears() + " year,"
                + " after adding one year it has " + periodBetweenPlus1Year.getYears());

        Period p1 = Period.ofDays(5);
        Period p2 = Period.ofDays(20);
        Period p1p2 = p1.plus(p2);
        System.out.println(p1 + "+" + p2 + "=" + p1p2);
    }
 

@Test(dataProvider="parseSuccess")
public void factory_parse_minus(String text, Period expected) {
    Period p = null;
    try {
        p = Period.parse("-" + text);
    } catch (DateTimeParseException ex) {
        assertEquals(expected.getYears() == Integer.MIN_VALUE ||
                expected.getMonths() == Integer.MIN_VALUE ||
                expected.getDays() == Integer.MIN_VALUE, true);
        return;
    }
    // not inside try/catch or it breaks test
    assertEquals(p, expected.negated());
}
 

@Test(dataProvider="parseFailure", expectedExceptions=DateTimeParseException.class)
public void factory_parseFailures(String text) {
    try {
        Period.parse(text);
    } catch (DateTimeParseException ex) {
        assertEquals(ex.getParsedString(), text);
        throw ex;
    }
}
 

@Test
public void whenTestPeriod_thenOk() {

    LocalDate startDate = LocalDate.of(2015, 2, 15);
    LocalDate endDate = LocalDate.of(2017, 1, 21);

    Period period = Period.between(startDate, endDate);

    LOG.info(String.format("Years:%d months:%d days:%d", period.getYears(), period.getMonths(), period.getDays()));

    assertFalse(period.isNegative());
    assertEquals(56, period.plusDays(50)
        .getDays());
    assertEquals(9, period.minusMonths(2)
        .getMonths());

    Period fromUnits = Period.of(3, 10, 10);
    Period fromDays = Period.ofDays(50);
    Period fromMonths = Period.ofMonths(5);
    Period fromYears = Period.ofYears(10);
    Period fromWeeks = Period.ofWeeks(40);

    assertEquals(280, fromWeeks.getDays());

    Period fromCharYears = Period.parse("P2Y");
    assertEquals(2, fromCharYears.getYears());
    Period fromCharUnits = Period.parse("P2Y3M5D");
    assertEquals(5, fromCharUnits.getDays());
}
 

/**
 * Defaults to a Period of 1 days in case of empty.
 * If partitionPeriod argument is a sub day unit (e.g. hourly), then uses Duration (stored in
 * seconds).
 * Otherwise use Period.
 * @param partitionPeriod partitionPeriod parameter to be parsed
 * @return
 */
private static TemporalAmount partitionPeriodTemporalAmount(final String partitionPeriod) {
  if (partitionPeriod == null) {
    return Period.ofDays(1);
  } else if (partitionPeriod.contains("PT")) {
    return Duration.parse(partitionPeriod);
  } else {
    return Period.parse(partitionPeriod);
  }
}
 

@Test(dataProvider="parseFailure", expectedExceptions=DateTimeParseException.class)
public void factory_parseFailures(String text) {
    try {
        Period.parse(text);
    } catch (DateTimeParseException ex) {
        assertEquals(ex.getParsedString(), text);
        throw ex;
    }
}
 

@Test(dataProvider="parseSuccess")
public void factory_parse_plus(String text, Period expected) {
    Period p = Period.parse("+" + text);
    assertEquals(p, expected);
}
 

@Override
public Period parse(String text, Locale locale) throws ParseException {
	return Period.parse(text);
}
 

public static Period convertPeriod(String period) {
    return period != null ? Period.parse(period) : null;
}
 

@Override
public Period convertToEntityAttribute(String dbData) {
    return Period.parse( dbData );
}
 

@Override
public Period parse(final String val) {
    return Period.parse(val);
}
 

@Test(expectedExceptions=NullPointerException.class)
public void factory_parse_null() {
    Period.parse(null);
}
 

public AdditionalDurationScalars() {
    this.duration = Duration.parse("PT1H2M3S");
    this.period = Period.parse("P1Y2M3D");
}
 

@Test(dataProvider="parseSuccess")
public void factory_parse_lowerCase(String text, Period expected) {
    Period p = Period.parse(text.toLowerCase(Locale.ENGLISH));
    assertEquals(p, expected);
}
 

@Test(dataProvider="parseSuccess")
public void factory_parse_plus(String text, Period expected) {
    Period p = Period.parse("+" + text);
    assertEquals(p, expected);
}
 

@Override
public Period parse(String text, Locale locale) throws ParseException {
	return Period.parse(text);
}
 

@Test(dataProvider="parseSuccess")
public void factory_parse(String text, Period expected) {
    Period p = Period.parse(text);
    assertEquals(p, expected);
}
 

@Test(expected=NullPointerException.class)
public void factory_parse_null() {
    Period.parse(null);
}
 

/**
 * Converts an FpML 'Period' to a {@code Period}.
 * 
 * @param baseEl  the FpML element to parse 
 * @return the period
 * @throws RuntimeException if unable to parse
 */
public Period parsePeriod(XmlElement baseEl) {
  // FpML content: ('periodMultiplier', 'period')
  String multiplier = baseEl.getChild("periodMultiplier").getContent();
  String unit = baseEl.getChild("period").getContent();
  return Period.parse("P" + multiplier + unit);
}