java - Java 8 的 Oracle JVM 中物理存储的 'tz' 时区数据库在哪里？

Question

对于Oracle implementation of Java 8对于 Mac OS X(以及 Linux 和 Windows)，tz time zone database 在哪里物理存储在 JDK/JRE 中？

我想找到实际的文件进行检查。

我在装有 El Capitan 的 Mac 上找到了 /Library/Java/JavaVirtualMachines/jdk1.8.0_92.jdk 中的 JVM。但是我细读了它的内容并没有发现任何我能识别的“tz”文件。

Answer 1

在 Java 8 中，tz 文件是

jre/lib/tzdb.dat

另见 Timezone Updater Tool .这在某种程度上说，

For JDK 8 and later family versions:

• Locate the 'tzdb.dat' file under the modified JAVAHOME/jre/lib directory. This is the newer data file.
• Locate the 'tzdb.dat.<oldtzdataversion>'; file in the same JAVAHOME/jre/lib directory. This is the replaced, older data file.
• Obtain the currently installed timezone data version from the command java -jar tzupdater.jar -V.
• Rename the current 'tzdb.dat' file to something like 'tzdb.dat.<newtzdataversion>', or whatever version was given by the command in step 3. Ensure this name does not conflict with the older data files.
• Rename the older data file to 'tzdb.dat'.
• Validate the change in currently active timezone data by executing java -jar tzupdater.jar -V.
• Restart applications on this JDK/JRE instance as desired.