时间转换工具

之前写的一个时间转换工具，分享下

import java.sql.Time; import java.sql.Timestamp; import java.text.ParseException; import java.text.SimpleDateFormat; import java.time.*; import java.time.format.DateTimeFormatter; import java.util.Date; import java.util.Map; import java.util.concurrent.ConcurrentHashMap; import java.util.regex.Pattern; /** * 时间格式的各种转换 * <p> * <ul> * 1.LocalDateTime ----> LocalDate * 2.LocalDateTime ----> Long * 3.LocalDateTime ----> Date * 4.LocalDateTime ----> String * * 1.LocalDate ----> LocalDateTime * 2.LocalDate ----> Long * 3.LocalDate ----> Date * 4.LocalDate ----> String * * 1.Date ----> LocalDateTime * 2.Date ----> LocalDate * 3.Date ----> Long * 4.Date ----> String * * 1.Timestamp ----> LocalDateTime * 2.Timestamp ----> Long * 3.Timestamp ----> String * 4.Timestamp ----> LocalDate * * 1.String ----> LocalDateTime * 2.String ----> LocalDate * 3.String ----> Date * 4.String ----> Timestamp * 5.String ----> LocalTime * 6.String ----> Time * * 1.Long ----> Date * 2.Long ----> LocalDateTime * 3.Long ----> LocalDate * </ul> * @author shizi * @since 2020/9/9 8:58 下午 */ public class LocalDateTimeUtil { public static final String yMdHmsSSS = "yyyy-MM-dd HH:mm:ss.SSS"; public static final String yMdHmsS = "yyyy-MM-dd HH:mm:ss.S"; public static final String yMdHms = "yyyy-MM-dd HH:mm:ss"; public static final String yMdHm = "yyyy-MM-dd HH:mm"; public static final String yMdH = "yyyy-MM-dd HH"; public static final String yMd = "yyyy-MM-dd"; public static final String yM = "yyyy-MM"; public static final String y = "yyyy"; public static final String HmsSSSMore = "HH:mm:ss.SSSSSSSSS"; public static final String HmsSSS = "HH:mm:ss.SSS"; public static final String Hms = "HH:mm:ss"; public static final String Hm = "HH:mm"; public static final String H = "HH"; private static final Pattern yMdHmsSSSPattern = Pattern.compile("^(\\d){4}-(\\d){2}-(\\d){2} (\\d){2}:(\\d){2}:(\\d){2}.(\\d){3}$"); private static final Pattern yMdHmsSPattern = Pattern.compile("^(\\d){4}-(\\d){2}-(\\d){2} (\\d){2}:(\\d){2}:(\\d){2}.(\\d){1}$"); private static final Pattern yMdHmsPattern = Pattern.compile("^(\\d){4}-(\\d){2}-(\\d){2} (\\d){2}:(\\d){2}:(\\d){2}$"); private static final Pattern yMdHmPattern = Pattern.compile("^(\\d){4}-(\\d){2}-(\\d){2} (\\d){2}:(\\d){2}$"); private static final Pattern yMdHPattern = Pattern.compile("^(\\d){4}-(\\d){2}-(\\d){2} (\\d){2}$"); private static final Pattern yMdPattern = Pattern.compile("^(\\d){4}-(\\d){2}-(\\d){2}$"); private static final Pattern yMPattern = Pattern.compile("^(\\d){4}-(\\d){2}$"); private static final Pattern yPattern = Pattern.compile("^(\\d){4}$"); private static final Map<String, SimpleDateFormat> simpleDateFormat = new ConcurrentHashMap<>(7); private static final Map<String, DateTimeFormatter> localDateTimeFormat = new ConcurrentHashMap<>(7); static { simpleDateFormat.put(yMdHmsSSS, new SimpleDateFormat(yMdHmsSSS)); simpleDateFormat.put(yMdHms, new SimpleDateFormat(yMdHms)); simpleDateFormat.put(yMdHm, new SimpleDateFormat(yMdHm)); simpleDateFormat.put(yMdH, new SimpleDateFormat(yMdH)); simpleDateFormat.put(yMd, new SimpleDateFormat(yMd)); simpleDateFormat.put(yM, new SimpleDateFormat(yM)); simpleDateFormat.put(y, new SimpleDateFormat(y)); localDateTimeFormat.put(yMdHmsSSS, DateTimeFormatter.ofPattern(yMdHmsSSS)); localDateTimeFormat.put(yMdHms, DateTimeFormatter.ofPattern(yMdHms)); localDateTimeFormat.put(yMdHm, DateTimeFormatter.ofPattern(yMdHm)); localDateTimeFormat.put(yMdH, DateTimeFormatter.ofPattern(yMdH)); localDateTimeFormat.put(yMd, DateTimeFormatter.ofPattern(yMd)); localDateTimeFormat.put(yM, DateTimeFormatter.ofPattern(yM)); localDateTimeFormat.put(y, DateTimeFormatter.ofPattern(y)); } /** * LocalDateTime 转 LocalDate */ private static LocalDate localDateTimeToLocalDate(LocalDateTime localDateTime) { return localDateTime.toLocalDate(); } /** * LocalDateTime 转 Long */ public static Long localDateTimeToLong(LocalDateTime localDateTime) { return localDateTime.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli(); } /** * LocalDateTime 转 Date */ public static Date localDateTimeToDate(LocalDateTime localDateTime) { return Date.from(localDateTime.atZone(ZoneId.systemDefault()).toInstant()); } /** * LocalDateTime 转 String */ public static String localDateTimeToString(LocalDateTime localDateTime) { return localDateTime.format(localDateTimeFormat.get(yMdHms)); } /** * LocalDateTime 转 String */ public static String localDateTimeToString(LocalDateTime localDateTime, String dateTimeFormat) { return localDateTime.format(localDateTimeFormat.get(dateTimeFormat)); } /** * LocalDateTime 转 String */ public static String localDateTimeToString(LocalDateTime localDateTime, DateTimeFormatter dateTimeFormatter) { return localDateTime.format(dateTimeFormatter); } /** * LocalDate 转 LocalDateTime */ public static LocalDateTime localDateToLocalDateTime(LocalDate localDate) { return LocalDateTime.of(localDate, LocalTime.parse("00:00:00")); } /** * LocalDate 转 Long */ public static Long localDateToLong(LocalDate localDate) { return localDate.atStartOfDay(ZoneId.systemDefault()).toInstant().toEpochMilli(); } /** * LocalDate 转 Date */ public static Date localDateToDate(LocalDate localDate) { return Date.from(localDate.atStartOfDay().atZone(ZoneId.systemDefault()).toInstant()); } /** * LocalDate 转 String */ public static String localDateToString(LocalDate localDate) { return localDate.format(localDateTimeFormat.get(yMd)); } /** * Date 转 LocalDateTime */ public static LocalDateTime dateToLocalDateTime(Date date) { return LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault()); } /** * Date 转 Long */ public static Long dateToLong(Date date) { return date.getTime(); } /** * Date 转 LocalDate */ public static LocalDate dateToLocalDate(Date date) { return LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault()).toLocalDate(); } /** * Date 转 String */ public static String dateToString(Date date) { return simpleDateFormat.get(yMdHms).format(date); } /** * Date 转 String */ public static String dateToString(Date date, SimpleDateFormat simpleDateFormat) { return simpleDateFormat.format(date); } /** * Date 转 String */ public static String dateToString(Date date, String simpleDateFormatStr) { return simpleDateFormat.get(simpleDateFormatStr).format(date); } /** * Timestamp 转 LocalDateTime */ public static LocalDateTime timestampToLocalDateTime(Timestamp timestamp) { return timestamp.toLocalDateTime(); } /** * Timestamp 转 Long */ public static Long timestampToLong(Timestamp timestamp) { return timestamp.getTime(); } /** * Timestamp 转 LocalDate */ public static LocalDate timestampToLocalDate(Timestamp timestamp) { return LocalDateTime.ofInstant(timestamp.toInstant(), ZoneId.systemDefault()).toLocalDate(); } /** * Timestamp 转 String */ public static String timestampToString(Timestamp timestamp) { return simpleDateFormat.get(yMdHmsSSS).format(timestamp); } /** * Timestamp 转 String */ public static String timestampToString(Timestamp timestamp, SimpleDateFormat simpleDateFormat) { return simpleDateFormat.format(timestamp); } /** * Timestamp 转 String */ public static String timestampToString(Timestamp timestamp, String simpleDateFormatStr) { return simpleDateFormat.get(simpleDateFormatStr).format(timestamp); } /** * String 转 LocalDateTime */ public static LocalDateTime stringToLocalDateTime(String strDateTime) { return LocalDateTime.parse(strDateTime, DateTimeFormatter.ofPattern(getTimeFormat(strDateTime))); } /** * String 转 LocalDateTime */ public static LocalDateTime stringToLocalDateTime(String strDateTime, String formatStr) { return LocalDateTime.parse(strDateTime, DateTimeFormatter.ofPattern(formatStr)); } /** * String 转 LocalDate */ public static LocalDate stringToLocalDate(String strDateTime) { return LocalDate.parse(strDateTime, localDateTimeFormat.get(yMd)); } /** * String 转 Date */ public static Date stringToDate(String strDateTime) { try { return simpleDateFormat.get(getTimeFormat(strDateTime)).parse(strDateTime); } catch (ParseException e) { throw new RuntimeException(e); } } /** * String 转 Timestamp */ public static Timestamp stringToTimestamp(String strDateTime) { return Timestamp.valueOf(strDateTime); } /** * String 转 LocalTime */ public static LocalTime stringToLocalTime(String strDateTime, String datetimeFormat) { return LocalTime.parse(strDateTime, DateTimeFormatter.ofPattern(datetimeFormat)); } /** * String 转 LocalTime */ public static LocalTime stringToLocalTime(String strDateTime) { return LocalTime.parse(strDateTime, DateTimeFormatter.ofPattern(HmsSSS)); } /** * String 转 Time */ public static Time stringToTime(String strDateTime) { return Time.valueOf(strDateTime); } /** * Long 转 Date */ public static Date longToDate(Long time) { return new Date(time); } /** * Long 转 LocalDateTime */ public static LocalDateTime longToLocalDateTime(Long time) { return LocalDateTime.ofInstant(Instant.ofEpochMilli(time), ZoneId.systemDefault()); } /** * Long 转 LocalDate */ public static LocalDate longToLocalDate(Long time) { return LocalDateTime.ofInstant(Instant.ofEpochMilli(time),ZoneId.systemDefault()).toLocalDate(); } private static String getTimeFormat(String strDateTime) { if (null == strDateTime) { throw new RuntimeException("获取时间格式错误, time =" + strDateTime); } String data; data = strDateTime.trim(); if ("".equals(data) || "null".equals(data)){ throw new RuntimeException("获取时间格式错误, time =" + strDateTime); } String timeFormat = yMdHms; if (yPattern.matcher(data).matches()) { timeFormat = y; } else if (yMPattern.matcher(data).matches()) { timeFormat = yM; } else if (yMdPattern.matcher(data).matches()) { timeFormat = yMd; } else if (yMdHPattern.matcher(data).matches()) { timeFormat = yMdH; } else if (yMdHmPattern.matcher(data).matches()) { timeFormat = yMdHm; } else if (yMdHmsPattern.matcher(data).matches()) { timeFormat = yMdHms; } else if (yMdHmsSPattern.matcher(data).matches()) { timeFormat = yMdHmsS; } else if (yMdHmsSSSPattern.matcher(data).matches()) { timeFormat = yMdHmsSSS; } return timeFormat; } }

测试

import org.junit.Assert; import org.junit.Test; import java.sql.Time; import java.sql.Timestamp; import java.text.SimpleDateFormat; import java.time.LocalDate; import java.time.LocalDateTime; import java.time.LocalTime; import java.time.format.DateTimeFormatter; import java.util.Date; import static com.simon.ocean.LocalDateTimeUtil.*; /** * @author shizi * @since 2020/10/19 6:44 下午 */ public class LocalDateTimeUtilTest { @Test public void localDateTimeToOtherTest() { LocalDateTime localDateTime = LocalDateTime.of(2020, 12, 20, 12, 12, 12, 123); Assert.assertEquals(Long.valueOf(1608437532000L), LocalDateTimeUtil.localDateTimeToLong(localDateTime)); Assert.assertEquals("Sun Dec 20 12:12:12 CST 2020", LocalDateTimeUtil.localDateTimeToDate(localDateTime).toString()); Assert.assertEquals("2020-12-20 12:12:12", LocalDateTimeUtil.localDateTimeToString(localDateTime)); Assert.assertEquals("2020-12-20 12:12:12.000", LocalDateTimeUtil.localDateTimeToString(localDateTime, yMdHmsSSS)); Assert.assertEquals("2020-12-20 12:12:12", LocalDateTimeUtil.localDateTimeToString(localDateTime, yMdHms)); Assert.assertEquals("2020-12-20 12:12", LocalDateTimeUtil.localDateTimeToString(localDateTime, yMdHm)); Assert.assertEquals("2020-12-20 12", LocalDateTimeUtil.localDateTimeToString(localDateTime, yMdH)); Assert.assertEquals("2020-12-20", LocalDateTimeUtil.localDateTimeToString(localDateTime, yMd)); Assert.assertEquals("2020-12", LocalDateTimeUtil.localDateTimeToString(localDateTime, yM)); Assert.assertEquals("2020", LocalDateTimeUtil.localDateTimeToString(localDateTime, y)); Assert.assertEquals("2020-12-20 12:12:12.000", LocalDateTimeUtil.localDateTimeToString(localDateTime, DateTimeFormatter.ofPattern(yMdHmsSSS))); Assert.assertEquals("2020-12-20 12:12:12", LocalDateTimeUtil.localDateTimeToString(localDateTime, DateTimeFormatter.ofPattern(yMdHms))); Assert.assertEquals("2020-12-20 12:12", LocalDateTimeUtil.localDateTimeToString(localDateTime, DateTimeFormatter.ofPattern(yMdHm))); Assert.assertEquals("2020-12-20 12", LocalDateTimeUtil.localDateTimeToString(localDateTime, DateTimeFormatter.ofPattern(yMdH))); Assert.assertEquals("2020-12-20", LocalDateTimeUtil.localDateTimeToString(localDateTime, DateTimeFormatter.ofPattern(yMd))); Assert.assertEquals("2020-12", LocalDateTimeUtil.localDateTimeToString(localDateTime, DateTimeFormatter.ofPattern(yM))); Assert.assertEquals("2020", LocalDateTimeUtil.localDateTimeToString(localDateTime, DateTimeFormatter.ofPattern(y))); } @Test public void localDateToOtherTest() { LocalDate localDate = LocalDate.of(2020, 12, 20); Date date = LocalDateTimeUtil.stringToDate("2020-12-20"); Assert.assertEquals(date, LocalDateTimeUtil.localDateToDate(localDate)); Assert.assertEquals(Long.valueOf(1608393600000L), LocalDateTimeUtil.localDateToLong(localDate)); Assert.assertEquals("2020-12-20", LocalDateTimeUtil.localDateToString(localDate)); LocalDateTime localDateTime = LocalDateTime.of(2020, 12, 20, 0, 0, 0); Assert.assertEquals(localDateTime, LocalDateTimeUtil.localDateToLocalDateTime(localDate)); } @Test public void dateToOtherTest() { Date date = LocalDateTimeUtil.stringToDate("2020-12-20 12:23:20"); LocalDate localDate = LocalDate.of(2020, 12, 20); Assert.assertEquals(localDate, LocalDateTimeUtil.dateToLocalDate(date)); LocalDateTime localDateTime = LocalDateTime.of(2020, 12, 20, 12, 23, 20); Assert.assertEquals(localDateTime, LocalDateTimeUtil.dateToLocalDateTime(date)); Assert.assertEquals("2020-12-20 12:23:20", LocalDateTimeUtil.dateToString(date)); Assert.assertEquals("2020-12-20 12:23:20.000", LocalDateTimeUtil.dateToString(date, new SimpleDateFormat(yMdHmsSSS))); Assert.assertEquals("2020-12-20 12:23:20", LocalDateTimeUtil.dateToString(date, new SimpleDateFormat(yMdHms))); Assert.assertEquals("2020-12-20 12:23", LocalDateTimeUtil.dateToString(date, new SimpleDateFormat(yMdHm))); Assert.assertEquals("2020-12-20 12", LocalDateTimeUtil.dateToString(date, new SimpleDateFormat(yMdH))); Assert.assertEquals("2020-12-20", LocalDateTimeUtil.dateToString(date, new SimpleDateFormat(yMd))); Assert.assertEquals("2020-12", LocalDateTimeUtil.dateToString(date, new SimpleDateFormat(yM))); Assert.assertEquals("2020", LocalDateTimeUtil.dateToString(date, new SimpleDateFormat(y))); Assert.assertEquals("2020-12-20 12:23:20.000", LocalDateTimeUtil.dateToString(date, yMdHmsSSS)); Assert.assertEquals("2020-12-20 12:23:20", LocalDateTimeUtil.dateToString(date, yMdHms)); Assert.assertEquals("2020-12-20 12:23", LocalDateTimeUtil.dateToString(date, yMdHm)); Assert.assertEquals("2020-12-20 12", LocalDateTimeUtil.dateToString(date, yMdH)); Assert.assertEquals("2020-12-20", LocalDateTimeUtil.dateToString(date, yMd)); Assert.assertEquals("2020-12", LocalDateTimeUtil.dateToString(date, yM)); Assert.assertEquals("2020", LocalDateTimeUtil.dateToString(date, y)); } @Test public void timestampToOtherTest() { Date date = LocalDateTimeUtil.stringToDate("2020-12-20 12:23:20.123"); Timestamp timestamp = new Timestamp(date.getTime()); LocalDate localDate = LocalDate.of(2020, 12, 20); Assert.assertEquals(localDate, LocalDateTimeUtil.timestampToLocalDate(timestamp)); Timestamp timestamp1 = Timestamp.valueOf("2020-12-20 12:23:20.000000123"); LocalDateTime localDateTime = LocalDateTime.of(2020, 12, 20, 12, 23, 20, 123); Assert.assertEquals(localDateTime, LocalDateTimeUtil.timestampToLocalDateTime(timestamp1)); Assert.assertEquals(Long.valueOf(1608438200000L), LocalDateTimeUtil.timestampToLong(timestamp1)); Assert.assertEquals("2020-12-20 12:23:20.000", LocalDateTimeUtil.timestampToString(timestamp1)); Assert.assertEquals("2020-12-20 12:23:20.000", LocalDateTimeUtil.timestampToString(timestamp1, new SimpleDateFormat(yMdHmsSSS))); Assert.assertEquals("2020-12-20 12:23:20", LocalDateTimeUtil.timestampToString(timestamp1, new SimpleDateFormat(yMdHms))); Assert.assertEquals("2020-12-20 12:23", LocalDateTimeUtil.timestampToString(timestamp1, new SimpleDateFormat(yMdHm))); Assert.assertEquals("2020-12-20 12", LocalDateTimeUtil.timestampToString(timestamp1, new SimpleDateFormat(yMdH))); Assert.assertEquals("2020-12-20", LocalDateTimeUtil.timestampToString(timestamp1, new SimpleDateFormat(yMd))); Assert.assertEquals("2020-12", LocalDateTimeUtil.timestampToString(timestamp1, new SimpleDateFormat(yM))); Assert.assertEquals("2020", LocalDateTimeUtil.timestampToString(timestamp1, new SimpleDateFormat(y))); Assert.assertEquals("2020-12-20 12:23:20.000", LocalDateTimeUtil.timestampToString(timestamp1, yMdHmsSSS)); Assert.assertEquals("2020-12-20 12:23:20", LocalDateTimeUtil.timestampToString(timestamp1, yMdHms)); Assert.assertEquals("2020-12-20 12:23", LocalDateTimeUtil.timestampToString(timestamp1, yMdHm)); Assert.assertEquals("2020-12-20 12", LocalDateTimeUtil.timestampToString(timestamp1, yMdH)); Assert.assertEquals("2020-12-20", LocalDateTimeUtil.timestampToString(timestamp1, yMd)); Assert.assertEquals("2020-12", LocalDateTimeUtil.timestampToString(timestamp1, yM)); Assert.assertEquals("2020", LocalDateTimeUtil.timestampToString(timestamp1, y)); } @Test public void stringToOtherTest() { String timeStr = "2020-12-20 12:23:20.123"; LocalDateTimeUtil.stringToDate(timeStr); Date date = LocalDateTimeUtil.stringToDate("2020-12-20 12:23:20.123"); Assert.assertEquals(date, LocalDateTimeUtil.stringToDate(timeStr)); Time time = Time.valueOf("12:23:20"); Assert.assertEquals(time, LocalDateTimeUtil.stringToTime("12:23:20")); LocalDate localDate = LocalDate.of(2020, 12, 20); Assert.assertEquals(localDate, LocalDateTimeUtil.stringToLocalDate("2020-12-20")); LocalDateTime localDateTime1 = LocalDateTime.of(2020, 10, 17, 11, 26, 33); Assert.assertEquals(localDateTime1, LocalDateTimeUtil.stringToLocalDateTime("2020-10-17 11:26:33")); LocalDateTime localDateTime2 = LocalDateTime.of(2020, 10, 17, 11, 26, 33, 0); Assert.assertEquals(localDateTime2, LocalDateTimeUtil.stringToLocalDateTime("2020-10-17 11:26:33.0")); LocalTime localTime1 = LocalTime.of(12, 23, 20, 123); Assert.assertEquals(localTime1, LocalDateTimeUtil.stringToLocalTime("12:23:20.000000123", "HH:mm:ss.SSSSSSSSS")); LocalTime localTime11 = LocalTime.of(12, 23, 20, 0); Assert.assertEquals(localTime11, LocalDateTimeUtil.stringToLocalTime("12:23:20.000", "HH:mm:ss.SSS")); LocalTime localTime2 = LocalTime.of(12, 23, 20); Assert.assertEquals(localTime2, LocalDateTimeUtil.stringToLocalTime("12:23:20", "HH:mm:ss")); LocalTime localTime3 = LocalTime.of(12, 23); Assert.assertEquals(localTime3, LocalDateTimeUtil.stringToLocalTime("12:23", "HH:mm")); Assert.assertEquals(localTime1, LocalDateTimeUtil.stringToLocalTime("12:23:20.000000123", HmsSSSMore)); Assert.assertEquals(localTime11, LocalDateTimeUtil.stringToLocalTime("12:23:20.000", HmsSSS)); Assert.assertEquals(localTime2, LocalDateTimeUtil.stringToLocalTime("12:23:20", Hms)); Assert.assertEquals(localTime3, LocalDateTimeUtil.stringToLocalTime("12:23", Hm)); Timestamp timestamp = Timestamp.valueOf("2020-12-20 12:23:20.000000123"); Assert.assertEquals(timestamp, LocalDateTimeUtil.stringToTimestamp("2020-12-20 12:23:20.000000123")); } }

更多工具详见这里 https://github.com/SimonAlong/Doramon