java-time

问题 I am trying to use Spring Data JPA 1.8 with the Java 8 Date/Time API JSR-310. Everything seems to work, until I try to get all Vehicles between two LocalDateTimes. The number of Entities returned seems to only have a loose correlation with the number it should. Entity @Repository public interface VehicleRepository extends JpaRepository<Vehicle, Long> { List<Vehicle> findByDateTimeBetween(LocalDateTime begin, LocalDateTime end); } Repository @Entity @Table(name = \"VEHICLE\") public class

问题 I\'m looking for a module for the new JDK8 java.time classes. I have looked through the FasterXML GitHub Project Listing and presently found none. As I understand Jackson is still being compiled against JDK6 so can not use these classes directly and must have this built as a separate module, as was required with Joda. I don\'t mind starting the project, though looking to see if any other efforts were already underway. 回答1: As already mentioned, Jackson-Datatype-JSR310 provides support for

问题 This question already has an answer here: Convert java.time.LocalDate into java.util.Date type 11 answers Is there a simple way to convert a LocalDate (introduced with Java 8) to java.util.Date object? By \'simple\', I mean simpler than this: Date date = Date.from(localDate.atStartOfDay(ZoneId.systemDefault()).toInstant()); which seems a bit awkward to me. Since we are interested only in the date portion and there is no timezone information in neither of the objects, why introduce time zones

问题 I have a simple jUnit test for DateTimeFormatterBuilder . At runtime it works, when some String comes on Spring-MVC hanlder ( @RequestParam ) At testtime it fails with the same String value. Tested value: 25-May-2018 11:10 Method to be tested: public void getTimeDifference(@RequestParam String startDate, @RequestParam String endDate) { DateTimeFormatter DATE_TIME_FORMAT = new DateTimeFormatterBuilder().parseCaseInsensitive().appendPattern(\"dd-MMM-yyyy HH:mm\").toFormatter(); LocalDateTime

问题 Java 8 introduced java.time.Clock which can be used as an argument to many other java.time objects, allowing you to inject a real or fake clock into them. For example, I know you can create a Clock.fixed() and then call Instant.now(clock) and it will return the fixed Instant you provided. This sounds perfect for unit testing! However, I\'m having trouble figuring out how best to use this. I have a class, similar to the following: public class MyClass { private Clock clock = Clock.systemUTC();

问题 The DateTimeFormatter class documentation says about its formatting codes for the year: u year year 2004; 04 y year-of-era year 2004; 04 … Year: The count of letters determines the minimum field width below which padding is used. If the count of letters is two, then a reduced two digit form is used. For printing, this outputs the rightmost two digits. For parsing, this will parse using the base value of 2000, resulting in a year within the range 2000 to 2099 inclusive. If the count of letters

问题 This question already has answers here : How to convert LocalDate to SQL Date Java? (3 answers) Closed 4 years ago . What\'s the correct way to convert between java.sql.Date and LocalDate (Java8)? 回答1: The Java 8 version (and later) of java.sql.Date has built in support for LocalDate , including toLocalDate and valueOf(LocalDate). To convert from LocalDate to java.sql.Date you can use java.sql.Date.valueOf( localDate ); And to convert from java.sql.Date to LocalDate : sqlDate.toLocalDate();

问题 I know there are questions relating to java.util.Date and Joda-Time. But after some digging, I couldn\'t find a thread about the differences between the java.time API (new in Java 8, defined by JSR 310) and Joda-Time. I have heard that Java 8’s java.time API is much cleaner and can do much more than Joda-Time. But I cannot find examples comparing the two. What can java.time do that Joda-Time cannot? What can java.time do better than Joda-Time? Is the performance better with java.time? 回答1:

问题 In Java how can I add one month to the current date? 回答1: Calendar cal = Calendar.getInstance(); cal.add(Calendar.MONTH, 1); 回答2: Java 8 LocalDate futureDate = LocalDate.now().plusMonths(1); 回答3: tl;dr LocalDate::plusMonths Example: LocalDate.now( ) .plusMonths( 1 ); Better to specify time zone. LocalDate.now( ZoneId.of( "America/Montreal" ) .plusMonths( 1 ); java.time The java.time framework is built into Java 8 and later. These classes supplant the old troublesome date-time classes such as

问题 I\'m using Java 8 for my new project. I\'m trying to use new date and time api in java 8 however I don\'t know if JPA 2.1 fully supports this new Date and Time API or not. Please share your experience/opinion in JPA`s supports for new date and time API in Java 8. Can I use new date and time api in Java 8 safely with JPA 2.1? UPDATE: I\'m using Hibernate (4.3.5.Final) as JPA implementation. 回答1: JPA 2.1 is a spec that came out before Java 1.8, so doesn't mandate any support for it. Obviously