Play Framework:无法加载JNotify本机库

Question

在我的Windows 10机器上启动Play项目时出现问题(在Win 7上运行正常)

当我做"激活运行"时,我得到以下内容:

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

我尝试了许多没有成功的事情.我试过改变:

addSbtPlugin("com.typesafe.play"%"sbt-plugin"%"2.2.2")

至

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

我收到另一个错误:

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)
       ...

那么,这是我目前的环境设置(更改sbt-plugin会导致第2期)

scalaVersion:="2.10.3" - >来自build.sbt

addSbtPlugin("com.typesafe.play"%"sbt-plugin"%"2.2.2") - >来自plugins.sbt

sbt.version = 0.13.1 - >来自build.properties

再次,我在Win 10(64位)上

这里真的需要一些帮助,被困了几天.

Answer 1

该消息表示Play无法找到jnotify lib,因此它将使用内部进程来检查文件更改(即在文件更改时重新编译并重新启动应用程序).它不应该阻止你使用框架,但性能可能比使用jnotify更糟糕.

无论哪种方式,您都可以从https://sourceforge.net/projects/jnotify/下载JNotify 并安装它(只需复制jnotify_64bit.dll到C:\Program Files\Java\jdk1.8.0_111\bin),该消息应该消失.