从org.joda.time.LocalDateTime转换为java.sql.date

我有这个密码

LocalDateTime localDateTime = LocalDateTime.parse("1777-11-11T00:00:00.000");
System.out.println("DateTimeZone.getDefault default" + DateTimeZone.getDefault());
System.out.println("Milliseconds UTC" + localDateTime.toDateTime(DateTimeZone.UTC).getMillis());
System.out.println("Milliseconds Europe rome" + localDateTime.toDateTime(DateTimeZone.forID("Europe/Rome")).getMillis());
java.sql.Timestamp t = new java.sql.Timestamp(localDateTime.toDateTime(DateTimeZone.forID("Europe/Rome")).getMillis());
System.out.println("End Date: "+  new java.sql.Timestamp(localDateTime.toDateTime(DateTimeZone.forID("Europe/Rome")).getMillis()));
        

其中，我将日期从org.joda.time.LocalDateTime转换为java.sql.date

输出是

DateTimeZone.getDefault defaultEurope/Rome
Milliseconds UTC   -6063292800000
Milliseconds Europe rome  -6063295796000
End Date: 1777-11-11 00:10:04.0

所以分和秒是错误的。 为什么会这样？我怎样才能解决这个问题

谢谢

所以分和秒是错误的。为什么会这样

发生这种情况是因为在意大利直到1893-10-31T23:49之前，区域偏移量分别为

49

分钟和

56

秒

查看更多信息

此外，请注意以下有关的事实：

应用时区时，本地日期时间可能受以下因素影响： 夏时制。在夏时制间隙中，当当地时间 不存在，此方法将引发异常。夏时制 重叠，当相同的本地时间出现两次时，此方法返回 当地时间的第一次出现

下面的代码演示：

直到

1893-10-31T23:49的
LocalDateTime
将转换为
DateTime
，偏移量为
49
分钟和
56
秒

从

1893-10-31T23:50到
1893-10-31T23:59的
LocalDateTime
将引发上述异常

以

1893-11-01T00:00开始的
LocalDateTime
将转换为
DateTime
，偏移量为
+01:00
小时

演示：

import org.joda.time.DateTimeZone;
import org.joda.time.LocalDateTime;

public class Main {
    public static void main(String[] args) {
        // Test date-time strings
        String[] arr = { "1893-10-31T23:49:00.000", "1893-11-01T00:00:00.000", "1893-10-31T23:50:00.000" };
        
        for (String dt : arr) {
            LocalDateTime localDateTime = LocalDateTime.parse(dt);
            System.out.println(localDateTime);
            System.out.println(localDateTime.toDateTime(DateTimeZone.forID("Europe/Rome")));
        }
    }
}

1893-10-31T23:49:00.000
1893-10-31T23:49:00.000+00:49:56
1893-11-01T00:00:00.000
1893-11-01T00:00:00.000+01:00
1893-10-31T23:50:00.000
Exception in thread "main" org.joda.time.IllegalInstantException: Illegal instant due to time zone offset transition (daylight savings time 'gap'): 1893-10-31T23:50:00.000 (Europe/Rome)
    at org.joda.time.chrono.ZonedChronology.localToUTC(ZonedChronology.java:157)
    at org.joda.time.chrono.ZonedChronology.getDateTimeMillis(ZonedChronology.java:122)
    at org.joda.time.chrono.AssembledChronology.getDateTimeMillis(AssembledChronology.java:133)
    at org.joda.time.base.BaseDateTime.<init>(BaseDateTime.java:257)
    at org.joda.time.DateTime.<init>(DateTime.java:532)
    at org.joda.time.LocalDateTime.toDateTime(LocalDateTime.java:753)
    at Main.main(Main.java:12)

import java.time.LocalDateTime;
import java.time.ZoneId;

public class Main {
    public static void main(String[] args) {
        // Test date-time strings
        String[] arr = { "1893-10-31T23:49:00.000", "1893-11-01T00:00:00.000", "1893-10-31T23:50:00.000" };
        ZoneId zoneId = ZoneId.of("Europe/Rome");

        for (String dt : arr) {
            LocalDateTime localDateTime = LocalDateTime.parse(dt);
            System.out.println(localDateTime);
            System.out.println(localDateTime.atZone(zoneId));
        }
    }
}

1893-10-31T23:49
1893-10-31T23:49+00:49:56[Europe/Rome]
1893-11-01T00:00
1893-11-01T00:00+01:00[Europe/Rome]
1893-10-31T23:50
1893-11-01T00:00:04+01:00[Europe/Rome]

输出：

import org.joda.time.DateTimeZone;
import org.joda.time.LocalDateTime;

public class Main {
    public static void main(String[] args) {
        // Test date-time strings
        String[] arr = { "1893-10-31T23:49:00.000", "1893-11-01T00:00:00.000", "1893-10-31T23:50:00.000" };
        
        for (String dt : arr) {
            LocalDateTime localDateTime = LocalDateTime.parse(dt);
            System.out.println(localDateTime);
            System.out.println(localDateTime.toDateTime(DateTimeZone.forID("Europe/Rome")));
        }
    }
}

1893-10-31T23:49:00.000
1893-10-31T23:49:00.000+00:49:56
1893-11-01T00:00:00.000
1893-11-01T00:00:00.000+01:00
1893-10-31T23:50:00.000
Exception in thread "main" org.joda.time.IllegalInstantException: Illegal instant due to time zone offset transition (daylight savings time 'gap'): 1893-10-31T23:50:00.000 (Europe/Rome)
    at org.joda.time.chrono.ZonedChronology.localToUTC(ZonedChronology.java:157)
    at org.joda.time.chrono.ZonedChronology.getDateTimeMillis(ZonedChronology.java:122)
    at org.joda.time.chrono.AssembledChronology.getDateTimeMillis(AssembledChronology.java:133)
    at org.joda.time.base.BaseDateTime.<init>(BaseDateTime.java:257)
    at org.joda.time.DateTime.<init>(DateTime.java:532)
    at org.joda.time.LocalDateTime.toDateTime(LocalDateTime.java:753)
    at Main.main(Main.java:12)

import java.time.LocalDateTime;
import java.time.ZoneId;

public class Main {
    public static void main(String[] args) {
        // Test date-time strings
        String[] arr = { "1893-10-31T23:49:00.000", "1893-11-01T00:00:00.000", "1893-10-31T23:50:00.000" };
        ZoneId zoneId = ZoneId.of("Europe/Rome");

        for (String dt : arr) {
            LocalDateTime localDateTime = LocalDateTime.parse(dt);
            System.out.println(localDateTime);
            System.out.println(localDateTime.atZone(zoneId));
        }
    }
}

1893-10-31T23:49
1893-10-31T23:49+00:49:56[Europe/Rome]
1893-11-01T00:00
1893-11-01T00:00+01:00[Europe/Rome]
1893-10-31T23:50
1893-11-01T00:00:04+01:00[Europe/Rome]

输出：

import org.joda.time.DateTimeZone;
import org.joda.time.LocalDateTime;

public class Main {
    public static void main(String[] args) {
        // Test date-time strings
        String[] arr = { "1893-10-31T23:49:00.000", "1893-11-01T00:00:00.000", "1893-10-31T23:50:00.000" };
        
        for (String dt : arr) {
            LocalDateTime localDateTime = LocalDateTime.parse(dt);
            System.out.println(localDateTime);
            System.out.println(localDateTime.toDateTime(DateTimeZone.forID("Europe/Rome")));
        }
    }
}

1893-10-31T23:49:00.000
1893-10-31T23:49:00.000+00:49:56
1893-11-01T00:00:00.000
1893-11-01T00:00:00.000+01:00
1893-10-31T23:50:00.000
Exception in thread "main" org.joda.time.IllegalInstantException: Illegal instant due to time zone offset transition (daylight savings time 'gap'): 1893-10-31T23:50:00.000 (Europe/Rome)
    at org.joda.time.chrono.ZonedChronology.localToUTC(ZonedChronology.java:157)
    at org.joda.time.chrono.ZonedChronology.getDateTimeMillis(ZonedChronology.java:122)
    at org.joda.time.chrono.AssembledChronology.getDateTimeMillis(AssembledChronology.java:133)
    at org.joda.time.base.BaseDateTime.<init>(BaseDateTime.java:257)
    at org.joda.time.DateTime.<init>(DateTime.java:532)
    at org.joda.time.LocalDateTime.toDateTime(LocalDateTime.java:753)
    at Main.main(Main.java:12)

import java.time.LocalDateTime;
import java.time.ZoneId;

public class Main {
    public static void main(String[] args) {
        // Test date-time strings
        String[] arr = { "1893-10-31T23:49:00.000", "1893-11-01T00:00:00.000", "1893-10-31T23:50:00.000" };
        ZoneId zoneId = ZoneId.of("Europe/Rome");

        for (String dt : arr) {
            LocalDateTime localDateTime = LocalDateTime.parse(dt);
            System.out.println(localDateTime);
            System.out.println(localDateTime.atZone(zoneId));
        }
    }
}

1893-10-31T23:49
1893-10-31T23:49+00:49:56[Europe/Rome]
1893-11-01T00:00
1893-11-01T00:00+01:00[Europe/Rome]
1893-10-31T23:50
1893-11-01T00:00:04+01:00[Europe/Rome]

从了解有关java.time API的更多信息

---

*无论出于何种原因，如果您必须坚持使用Java 6或Java 7，您都可以使用哪些后端端口将大部分Java.time功能移植到Java 6和7。如果您正在为Android项目工作，并且您的Android API级别仍然不符合Java-8，请检查并确认。

---

我建议您既不要使用

java.sql.Date

也不要使用

java.sql.Timestamp

。这两个类的设计都很糟糕，而且早已过时。例如，使用来自的

LocalDate

或

LocalDateTime

。此外，java.time已经取代了Joda-time，因此对于更简单和现代的代码，请全部使用java.time。那么您可能根本不需要任何转换。