在Java 8上为maven单元测试设置时区 [英] Setting timezone for maven unit tests on Java 8
问题描述
如何在Java 8上的maven surefire中设置单元测试的时区?
How do I set the timezone for unit tests in maven surefire on Java 8?
使用Java 7,这曾经用于 systemPropertyVariables
就像在以下配置中一样,但是对于Java 8,测试只使用系统时区。
With Java 7 this used to work with systemPropertyVariables
like in the following configuration, but with Java 8 the tests just use the system timezone.
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<systemPropertyVariables>
<user.timezone>UTC</user.timezone>
</systemPropertyVariables>
为什么会这样,我该如何解决?
Why is that, and how do I fix it?
推荐答案
简短回答
Java现在读取 user.timezone
之前,surefire在 systemPropertyVariables
中设置属性。解决方案是先使用 argLine
设置它:
Short answer
Java now reads user.timezone
earlier, before surefire sets the properties in systemPropertyVariables
. The solution is to set it earlier, using argLine
:
<plugin>
...
<configuration>
<argLine>-Duser.timezone=UTC</argLine>
长答案
Java初始化默认值时区,将 user.timezone
考虑到它需要的第一个时间,然后将其缓存在 java.util.TimeZone中
。现在在读取jar文件时已经发生了这种情况: ZipFile.getZipEntry
现在调用 ZipUtils.dosToJavaTime
创建一个日期
初始化默认时区的实例。这不是一个特定的问题。此程序用于以UTC格式打印时间,但现在使用系统时区:
Long answer
Java initializes the default timezone, taking user.timezone
into account the first time it needs it and then caches it in java.util.TimeZone
. That now happens already when reading a jar file: ZipFile.getZipEntry
now calls ZipUtils.dosToJavaTime
which creates a Date
instance that initializes the default timezone. This is not a surefire-specific problem. This program used to print the time in UTC, but now uses the system timezone:
import java.util.*;
class TimeZoneTest {
public static void main(String[] args) {
System.setProperty("user.timezone", "UTC");
System.out.println(new Date());
}
}
一般情况下,解决方案是指定时区命令行,如 java -Duser.timezone = UTC TimeZoneTest
,或者以编程方式设置 TimeZone.setDefault(TimeZone.getTimeZone(UTC)) );
。
In general, the solution is to specify the timezone on the command line, like java -Duser.timezone=UTC TimeZoneTest
, or set it programmatically with TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
.
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