java-time

问题 In my test case, I need test time sensitive method, in that method we're using java 8 class LocalDate, it is not Joda . What can I do to change time, when I'm running test 回答1: In your code, replace LocalDate.now() with LocalDate.now(clock);. You can then pass Clock.systemDefaultZone() for production and a fixed clock for testing. This is an example : First, inject the Clock . If you are using spring boot just do a : @Bean public Clock clock() { return Clock.systemDefaultZone(); } Second,

问题 Input is a string such as "23:55" or "09:20", i.e. in the "HH:mm" format. I want the string to specify the time of day in UTC. I want to use java.time to parse the string and the output to be an Instant with the specified time of day today. If needed I can append a time zone to the string, i.e. "23:55 UTC". I want to use the resulting instant to calculate the number of nanos between now and the mentioned instant. I.e. Duration.between(Instant.now(), resultingInstant).toNanos(); Edit: Might

问题 I am using the recent java.time package and in particular the day of week getter of LocalDate. I get a nice DayOfWeek enum when calling LocalDate.getDayOfWeek() . However, my code should be compatible with some older part of the application that uses the integer value of a Calendar weekday, i.e. obtained from the code Calendar.get(DAY_OF_WEEK) . Obviously, in the DayOfWeek enum, SUNDAY value is 7, and in Calendar DAY_OF_WEEK field, SUNDAY value is 1. So, what choices do I have to convert one

问题 I am using the recent java.time package and in particular the day of week getter of LocalDate. I get a nice DayOfWeek enum when calling LocalDate.getDayOfWeek() . However, my code should be compatible with some older part of the application that uses the integer value of a Calendar weekday, i.e. obtained from the code Calendar.get(DAY_OF_WEEK) . Obviously, in the DayOfWeek enum, SUNDAY value is 7, and in Calendar DAY_OF_WEEK field, SUNDAY value is 1. So, what choices do I have to convert one

问题 Jackson operates java.time.Instant with WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS ( READ_ as well) enabled by default. jackson-datatype-jsr310 It produces JSON like this { "createDate":1421261297.356000000, "modifyDate":1421261297.356000000 } In JavaScript it's much easier to get Date from traditional millis timestamp (not from seconds/nanos as above), like new Date(1421261297356) . I think there should be some reason to have the nanos approach by default, so what is that reason? 回答1: One way is

问题 I am new in Mapstruct. I have a model object which includes LocalDateTime type field. DTO includes Instant type field. I want to map LocalDateTime type field to Instant type field. I have TimeZone instance of incoming requests. Manually field setting like that; set( LocalDateTime.ofInstant(x.getStartDate(), timeZone.toZoneId()) ) How can I map these fields using with Mapstruct? 回答1: You have 2 options to achieve what you are looking for. First option: Use the new @Context annotation from 1.2

问题 I need to parse a field which is sometimes given as a date and sometimes as a date/time. Is it possible to use single datatype for this using Java 8 time API? Currently, I attempted to use a LocalDateTime for it, but for following invocation LocalDateTime.parse("1986-04-08", DateTimeFormatter.ofPattern("yyyy-MM-dd")) I get a java.time.DateTimeException: Unable to obtain LocalDateTime from TemporalAccessor: {},ISO resolved to 1986-04-08 of type java.time.format.Parsed This is part of some

问题 I need to parse a field which is sometimes given as a date and sometimes as a date/time. Is it possible to use single datatype for this using Java 8 time API? Currently, I attempted to use a LocalDateTime for it, but for following invocation LocalDateTime.parse("1986-04-08", DateTimeFormatter.ofPattern("yyyy-MM-dd")) I get a java.time.DateTimeException: Unable to obtain LocalDateTime from TemporalAccessor: {},ISO resolved to 1986-04-08 of type java.time.format.Parsed This is part of some

问题 This question already has answers here : How to format YearMonth and MonthDay depending on a Locale? (3 answers) Closed 2 years ago . The java.time classes built into Java 8 and later offer the MonthDay and YearMonth classes. Their toString and parse methods use standard ISO 8601 formats ( --MM-DD & YYYY-MM ), which is wise. For presentation to humans, the standard formats may not be suitable. Is there anyway to generate an automatically localized string to represent the values in objects of

问题 This question already has answers here : How to format YearMonth and MonthDay depending on a Locale? (3 answers) Closed 2 years ago . The java.time classes built into Java 8 and later offer the MonthDay and YearMonth classes. Their toString and parse methods use standard ISO 8601 formats ( --MM-DD & YYYY-MM ), which is wise. For presentation to humans, the standard formats may not be suitable. Is there anyway to generate an automatically localized string to represent the values in objects of