Java ParsePosition類代碼示例

import java.text.ParsePosition; //導入依賴的package包/類
/**
 * Convert a String into a <code>Number</code> object.
 * @param sourceType the source type of the conversion
 * @param targetType The type to convert the value to
 * @param value The String date value.
 * @param format The NumberFormat to parse the String value.
 *
 * @return The converted Number object.
 * @throws ConversionException if the String cannot be converted.
 */
private Number parse(final Class<?> sourceType, final Class<?> targetType, final String value, final NumberFormat format) {
    final ParsePosition pos = new ParsePosition(0);
    final Number parsedNumber = format.parse(value, pos);
    if (pos.getErrorIndex() >= 0 || pos.getIndex() != value.length() || parsedNumber == null) {
        String msg = "Error converting from '" + toString(sourceType) + "' to '" + toString(targetType) + "'";
        if (format instanceof DecimalFormat) {
            msg += " using pattern '" + ((DecimalFormat)format).toPattern() + "'";
        }
        if (locale != null) {
            msg += " for locale=[" + locale + "]";
        }
        if (log().isDebugEnabled()) {
            log().debug("    " + msg);
        }
        throw new ConversionException(msg);
    }
    return parsedNumber;
}
 

import java.text.ParsePosition; //導入依賴的package包/類
@Test(dataProvider="ReducedWithChrono")
public void test_reducedWithChronoYear(ChronoLocalDate date) {
    Chronology chrono = date.getChronology();
    DateTimeFormatter df
            = new DateTimeFormatterBuilder().appendValueReduced(YEAR, 2, 2, LocalDate.of(2000, 1, 1))
            .toFormatter()
            .withChronology(chrono);
    int expected = date.get(YEAR);
    String input = df.format(date);

    ParsePosition pos = new ParsePosition(0);
    TemporalAccessor parsed = df.parseUnresolved(input, pos);
    int actual = parsed.get(YEAR);
    assertEquals(actual, expected,
            String.format("Wrong date parsed, chrono: %s, input: %s",
            chrono, input));

}
 

import java.text.ParsePosition; //導入依賴的package包/類
private void processAndAddData(final Realm realm, final String sectionKey, final List<NYTimesStory> stories) {
    if (stories.isEmpty()) return;

    realm.executeTransactionAsync(r -> {
        for (NYTimesStory story : stories) {
            Date parsedPublishedDate = inputDateFormat.parse(story.getPublishedDate(), new ParsePosition(0));
            story.setSortTimeStamp(parsedPublishedDate.getTime());
            story.setPublishedDate(outputDateFormat.format(parsedPublishedDate));

            // Find existing story in Realm (if any)
            // If it exists, we need to merge the local state with the remote, because the local state
            // contains more info than is available on the server.
            NYTimesStory persistedStory = r.where(NYTimesStory.class).equalTo(NYTimesStory.URL, story.getUrl()).findFirst();
            if (persistedStory != null) {
                // Only local state is the `read` boolean.
                story.setRead(persistedStory.isRead());
            }

            // Only create or update the local story if needed
            if (persistedStory == null || !persistedStory.getUpdatedDate().equals(story.getUpdatedDate())) {
                story.setApiSection(sectionKey);
                r.copyToRealmOrUpdate(story);
            }
        }
    }, throwable -> Timber.e(throwable, "Could not save data"));
}
 

import java.text.ParsePosition; //導入依賴的package包/類
@Test(dataProvider="parseData")
public void test_parse_textField(int minWidth, int maxWidth, SignStyle signStyle, int subsequentWidth, String text, int pos, int expectedPos, long expectedValue) {
    ParsePosition ppos = new ParsePosition(pos);
    DateTimeFormatter dtf = getFormatter(DAY_OF_WEEK, minWidth, maxWidth, signStyle);
    if (subsequentWidth > 0) {
        // hacky, to reserve space
        dtf = builder.appendValue(DAY_OF_YEAR, subsequentWidth).toFormatter(locale).withDecimalStyle(decimalStyle);
    }
    TemporalAccessor parsed = dtf.parseUnresolved(text, ppos);
    if (ppos.getErrorIndex() != -1) {
        assertEquals(ppos.getErrorIndex(), expectedPos);
    } else {
        assertTrue(subsequentWidth >= 0);
        assertEquals(ppos.getIndex(), expectedPos + subsequentWidth);
        assertEquals(parsed.getLong(DAY_OF_WEEK), expectedValue);
        assertEquals(parsed.query(TemporalQueries.chronology()), null);
        assertEquals(parsed.query(TemporalQueries.zoneId()), null);
    }
}
 

import java.text.ParsePosition; //導入依賴的package包/類
public void testParseRfc3339Examples() throws java.text.ParseException {
    // Two digit milliseconds.
    Date d = ISO8601Utils.parse("1985-04-12T23:20:50.52Z", new ParsePosition(0));
    assertEquals(newDate(1985, 4, 12, 23, 20, 50, 520, 0), d);

    d = ISO8601Utils.parse("1996-12-19T16:39:57-08:00", new ParsePosition(0));
    assertEquals(newDate(1996, 12, 19, 16, 39, 57, 0, -8 * 60), d);

    // Truncated leap second.
    d = ISO8601Utils.parse("1990-12-31T23:59:60Z", new ParsePosition(0));
    assertEquals(newDate(1990, 12, 31, 23, 59, 59, 0, 0), d);

    // Truncated leap second.
    d = ISO8601Utils.parse("1990-12-31T15:59:60-08:00", new ParsePosition(0));
    assertEquals(newDate(1990, 12, 31, 15, 59, 59, 0, -8 * 60), d);

    // Two digit milliseconds.
    d = ISO8601Utils.parse("1937-01-01T12:00:27.87+00:20", new ParsePosition(0));
    assertEquals(newDate(1937, 1, 1, 12, 0, 27, 870, 20), d);
}
 

import java.text.ParsePosition; //導入依賴的package包/類
/**
 * Parses and resolves the specified text.
 * <p>
 * This parses to a {@code TemporalAccessor} ensuring that the text is fully parsed.
 *
 * @param text  the text to parse, not null
 * @param position  the position to parse from, updated with length parsed
 *  and the index of any error, null if parsing whole string
 * @return the resolved result of the parse, not null
 * @throws DateTimeParseException if the parse fails
 * @throws DateTimeException if an error occurs while resolving the date or time
 * @throws IndexOutOfBoundsException if the position is invalid
 */
private TemporalAccessor parseResolved0(final CharSequence text, final ParsePosition position) {
    ParsePosition pos = (position != null ? position : new ParsePosition(0));
    DateTimeParseContext context = parseUnresolved0(text, pos);
    if (context == null || pos.getErrorIndex() >= 0 || (position == null && pos.getIndex() < text.length())) {
        String abbr;
        if (text.length() > 64) {
            abbr = text.subSequence(0, 64).toString() + "...";
        } else {
            abbr = text.toString();
        }
        if (pos.getErrorIndex() >= 0) {
            throw new DateTimeParseException("Text '" + abbr + "' could not be parsed at index " +
                    pos.getErrorIndex(), text, pos.getErrorIndex());
        } else {
            throw new DateTimeParseException("Text '" + abbr + "' could not be parsed, unparsed text found at index " +
                    pos.getIndex(), text, pos.getIndex());
        }
    }
    return context.toResolved(resolverStyle, resolverFields);
}
 

import java.text.ParsePosition; //導入依賴的package包/類
@Test(dataProvider="ReducedWithChrono")
public void test_reducedWithChronoYearOfEra(ChronoLocalDate date) {
    Chronology chrono = date.getChronology();
    DateTimeFormatter df
            = new DateTimeFormatterBuilder().appendValueReduced(YEAR_OF_ERA, 2, 2, LocalDate.of(2000, 1, 1))
            .toFormatter()
            .withChronology(chrono);
    int expected = date.get(YEAR_OF_ERA);
    String input = df.format(date);

    ParsePosition pos = new ParsePosition(0);
    TemporalAccessor parsed = df.parseUnresolved(input, pos);
    int actual = parsed.get(YEAR_OF_ERA);
    assertEquals(actual, expected,
            String.format("Wrong date parsed, chrono: %s, input: %s",
            chrono, input));

}
 

import java.text.ParsePosition; //導入依賴的package包/類
@Test
public void test_reducedWithLateChronoChange() {
    ThaiBuddhistDate date = ThaiBuddhistDate.of(2543, 1, 1);
    DateTimeFormatter df
            = new DateTimeFormatterBuilder()
                    .appendValueReduced(YEAR, 2, 2, LocalDate.of(2000, 1, 1))
                    .appendLiteral(" ")
                    .appendChronologyId()
            .toFormatter();
    int expected = date.get(YEAR);
    String input = df.format(date);

    ParsePosition pos = new ParsePosition(0);
    TemporalAccessor parsed = df.parseUnresolved(input, pos);
    assertEquals(pos.getIndex(), input.length(), "Input not parsed completely");
    assertEquals(pos.getErrorIndex(), -1, "Error index should be -1 (no-error)");
    int actual = parsed.get(YEAR);
    assertEquals(actual, expected,
            String.format("Wrong date parsed, chrono: %s, input: %s",
            parsed.query(TemporalQueries.chronology()), input));

}
 

import java.text.ParsePosition; //導入依賴的package包/類
@Override
public java.sql.Date read(JsonReader in) throws IOException {
    switch (in.peek()) {
        case NULL:
            in.nextNull();
            return null;
        default:
            String date = in.nextString();
            try {
                if (dateFormat != null) {
                    return new java.sql.Date(dateFormat.parse(date).getTime());
                }
                return new java.sql.Date(ISO8601Utils.parse(date, new ParsePosition(0)).getTime());
            } catch (ParseException e) {
                throw new JsonParseException(e);
            }
    }
}
 

import java.text.ParsePosition; //導入依賴的package包/類
/**
 * Implement SymbolTable API.  Parse out a symbol reference
 * name.
 */
@Override
public String parseReference(String text, ParsePosition pos, int limit) {
    int start = pos.getIndex();
    int i = start;
    while (i < limit) {
        char c = text.charAt(i);
        if ((i==start && !UCharacter.isUnicodeIdentifierStart(c)) ||
            !UCharacter.isUnicodeIdentifierPart(c)) {
            break;
        }
        ++i;
    }
    if (i == start) { // No valid name chars
        return null;
    }
    pos.setIndex(i);
    return text.substring(start, i);
}
 

import java.text.ParsePosition; //導入依賴的package包/類
@Test
public void test_parse_CharSequence_ParsePosition_resolved() {
    DateTimeFormatter test = DateTimeFormatter.ISO_DATE;
    ParsePosition pos = new ParsePosition(3);
    TemporalAccessor result = test.parse("XXX2012-06-30XXX", pos);
    assertEquals(pos.getIndex(), 13);
    assertEquals(pos.getErrorIndex(), -1);
    assertEquals(result.isSupported(YEAR), true);
    assertEquals(result.isSupported(MONTH_OF_YEAR), true);
    assertEquals(result.isSupported(DAY_OF_MONTH), true);
    assertEquals(result.isSupported(HOUR_OF_DAY), false);
    assertEquals(result.getLong(YEAR), 2012L);
    assertEquals(result.getLong(MONTH_OF_YEAR), 6L);
    assertEquals(result.getLong(DAY_OF_MONTH), 30L);
    assertEquals(result.query(LocalDate::from), LocalDate.of(2012, 6, 30));
}
 

import java.text.ParsePosition; //導入依賴的package包/類
@Test
public void test_reducedWithLateChronoChangeTwice() {
    DateTimeFormatter df
            = new DateTimeFormatterBuilder()
                    .appendValueReduced(YEAR, 2, 2, LocalDate.of(2000, 1, 1))
                    .appendLiteral(" ")
                    .appendChronologyId()
                    .appendLiteral(" ")
                    .appendChronologyId()
            .toFormatter();
    int expected = 2044;
    String input = "44 ThaiBuddhist ISO";
    ParsePosition pos = new ParsePosition(0);
    TemporalAccessor parsed = df.parseUnresolved(input, pos);
    assertEquals(pos.getIndex(), input.length(), "Input not parsed completely: " + pos);
    assertEquals(pos.getErrorIndex(), -1, "Error index should be -1 (no-error)");
    int actual = parsed.get(YEAR);
    assertEquals(actual, expected,
            String.format("Wrong date parsed, chrono: %s, input: %s",
            parsed.query(TemporalQueries.chronology()), input));

}
 

import java.text.ParsePosition; //導入依賴的package包/類
@Test(dataProvider="bigOffsets")
public void test_parse_bigOffsets(String pattern, String parse, long offsetSecs) throws Exception {
    ParsePosition pos = new ParsePosition(0);
    TemporalAccessor parsed = getFormatter(pattern, "").parseUnresolved(parse, pos);
    assertEquals(pos.getIndex(), parse.length());
    assertEquals(parsed.getLong(OFFSET_SECONDS), offsetSecs);
}
 

import java.text.ParsePosition; //導入依賴的package包/類
public void test_parse_noMatch_atEnd() throws Exception {
    ParsePosition pos = new ParsePosition(6);
    TemporalAccessor parsed =
        getFormatter(DAY_OF_WEEK, TextStyle.FULL).parseUnresolved("Monday", pos);
    assertEquals(pos.getErrorIndex(), 6);
    assertEquals(parsed, null);
}
 

import java.text.ParsePosition; //導入依賴的package包/類
private static TextFormatter<String> createDecimalFormatter() {
	DecimalFormat format = new DecimalFormat("#.0");
	format.setNegativePrefix("-");
	return new TextFormatter<>(c -> {
		if (c.getControlNewText().isEmpty()) return c;
		ParsePosition pos = new ParsePosition(0);
		Number result = format.parse(c.getControlNewText(), pos);
		if (result == null || pos.getIndex() < c.getControlNewText().length()) {
			return null;
		} else return c;
	});
}