播放框架：无法加载JNotify本机库

Question

在我的Windows10机器上启动播放项目时遇到问题（在Win7上运行良好）

当我执行“激活器运行”时，我会得到以下结果：

Error loading library, java.library.path=C:\Program Files\Java\jdk1.8.0_111\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\cygwin64\usr\local\bin;C:\cygwin64\bin;C:\ProgramData\Oracle\Java\javapath;C:\Program Files (x86)\Intel\iCLS Client;C:\Program Files\Intel\iCLS Client;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\WiFi\bin;C:\Program Files\Common Files\Intel\WirelessCommon;C:\Program Files\Java\jdk1.8.0_111\bin;C:\Program Files\PostgreSQL\9.6\bin;C:\Program Files\Git\cmd;C:\dev\utils\activator-1.3.5-minimal;C:\Users\shuda\AppData\Local\Microsoft\WindowsApps;C:\Program Files\Heroku\bin;.;C:\dev\projects\energywatch-portal-bk\target\native_libraries\64bits

Cannot load the JNotify native library (no jnotify_64bit in java.library.path)
Play will check file changes for each request, so expect degraded reloading performace.

--- (Running the application from SBT, auto-reloading is enabled) ---

[info] play - Listening for HTTP on /0:0:0:0:0:0:0:0:9000

(Server started, use Ctrl+D to stop and go back to the console...)

[success] Compiled in 1s

我试过很多事情都没有成功。我试着从：

至

addSbtPlugin（“com.typesafe.play”%“sbt-plugin”%“2.3.2”）

我得到另一个错误：

java.lang.NoClassDefFoundError: play/Project$
        at com.typesafe.sbt.SbtEchoPlay$.tracePlaySettings(SbtEchoPlay.scala:19)
        at com.typesafe.sbt.SbtEchoPlay$.echoPlaySettings$lzycompute(SbtEchoPlay.scala:16)
        at com.typesafe.sbt.SbtEchoPlay$.echoPlaySettings(SbtEchoPlay.scala:16)
...
Caused by: java.lang.ClassNotFoundException: play.Project$
        at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        at com.typesafe.sbt.SbtEchoPlay$.tracePlaySettings(SbtEchoPlay.scala:19)
        at com.typesafe.sbt.SbtEchoPlay$.echoPlaySettings$lzycompute(SbtEchoPlay.scala:16)
        at com.typesafe.sbt.SbtEchoPlay$.echoPlaySettings(SbtEchoPlay.scala:16)
       ...

再一次，我在Win10(64bit)上

这里真的需要一些帮助，被困了几天。

Answer 1

该消息意味着Play找不到jnotify库，因此它将使用一个内部进程来检查文件更改（即当文件更改时重新编译并重新启动应用程序）。它不应该阻止您使用该框架，但性能可能比使用JNotify最差。

不管是哪种方式，您都可以从https://sourceforge.net/projects/JNotify/下载JNotify并安装它（只需将jnotify_64bit.dll复制到C:\Program Files\java\jdk1.8.0_111\bin)，该消息就会消失。