java - 构建 Maven jar 不起作用

Question

我是 JavaFX 的新手。我用 Maven 创建了 JavaFX 项目并添加了所有依赖项。 idea 中的项目完美运行，但是当我在 maven 中构建它并尝试在目标文件夹中打开时，jar 没有反应，并且出现以下错误。

java.lang.ClassNotFoundException: com.mysql.cj.jdbc.Driver at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Unknown Source) at sample.JdbcPlainTest.createConnection(JdbcPlainTest.java:21) at sample.JdbcPlainTest.ProductsSelectQuery(JdbcPlainTest.java:84) at sample.Controller.initialize(Controller.java:84) at javafx.fxml.FXMLLoader.loadImpl(Unknown Source) at javafx.fxml.FXMLLoader.loadImpl(Unknown Source) at javafx.fxml.FXMLLoader.loadImpl(Unknown Source) at javafx.fxml.FXMLLoader.loadImpl(Unknown Source) at javafx.fxml.FXMLLoader.loadImpl(Unknown Source) at javafx.fxml.FXMLLoader.loadImpl(Unknown Source) at javafx.fxml.FXMLLoader.loadImpl(Unknown Source) at javafx.fxml.FXMLLoader.load(Unknown Source) at sample.Main.start(Main.java:14) at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$153 (Unknown Source) at com.sun.javafx.application.LauncherImpl$$Lambda$51/881058039.run(Unkn own Source) at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$166(Unknown Source) at com.sun.javafx.application.PlatformImpl$$Lambda$45/584634336.run(Unkn own Source) at com.sun.javafx.application.PlatformImpl.lambda$null$164(Unknown Sourc e) at com.sun.javafx.application.PlatformImpl$$Lambda$47/474818150.run(Unkn own Source) at java.security.AccessController.doPrivileged(Native Method) at com.sun.javafx.application.PlatformImpl.lambda$runLater$165(Unknown S ource) at com.sun.javafx.application.PlatformImpl$$Lambda$46/501263526.run(Unkn own Source) at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source) at com.sun.glass.ui.win.WinApplication._runLoop(Native Method) at com.sun.glass.ui.win.WinApplication.lambda$null$141(Unknown Source) at com.sun.glass.ui.win.WinApplication$$Lambda$37/96639997.run(Unknown S ource) at java.lang.Thread.run(Unknown Source) Exception in Application start method java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(Unk nown Source) at com.sun.javafx.application.LauncherImpl.launchApplication(Unknown Sou rce) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at sun.launcher.LauncherHelper$FXHelper.main(Unknown Source) Caused by: java.lang.RuntimeException: Exception in Application start method at com.sun.javafx.application.LauncherImpl.launchApplication1(Unknown So urce) at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$147( Unknown Source) at com.sun.javafx.application.LauncherImpl$$Lambda$48/815033865.run(Unkn own Source) at java.lang.Thread.run(Unknown Source) Caused by: javafx.fxml.LoadException: file:/D:/work%20proyeqt%20immidetely/JASMIN/Qassa%20-%20CopyWORKING/target/Qassa Copy-1.0-SNAPSHOT.jar!/sample.fxml

    at javafx.fxml.FXMLLoader.constructLoadException(Unknown Source)
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
    at javafx.fxml.FXMLLoader.load(Unknown Source)
    at sample.Main.start(Main.java:14)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$153

(Unknown Source) at com.sun.javafx.application.LauncherImpl$$Lambda$51/881058039.run(Unkn own Source) at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$166(Unknown Source) at com.sun.javafx.application.PlatformImpl$$Lambda$45/584634336.run(Unkn own Source) at com.sun.javafx.application.PlatformImpl.lambda$null$164(Unknown Sourc e) at com.sun.javafx.application.PlatformImpl$$Lambda$47/474818150.run(Unkn own Source) at java.security.AccessController.doPrivileged(Native Method) at com.sun.javafx.application.PlatformImpl.lambda$runLater$165(Unknown S ource) at com.sun.javafx.application.PlatformImpl$$Lambda$46/501263526.run(Unkn own Source) at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source) at com.sun.glass.ui.win.WinApplication._runLoop(Native Method) at com.sun.glass.ui.win.WinApplication.lambda$null$141(Unknown Source) at com.sun.glass.ui.win.WinApplication$$Lambda$37/96639997.run(Unknown S ource) ... 1 more Caused by: java.lang.NullPointerException at sample.JdbcPlainTest.ProductsSelectQuery(JdbcPlainTest.java:108) at sample.Controller.initialize(Controller.java:84) ... 23 more Exception running application sample.Main

Answer 1

似乎您的依赖项未包含在您的 jar 中。打开您的 .jar 并查看是否所有依赖类(如 com.mysql.cj.jdbc.Driver)都在里面。如果不是，请参阅 Including dependencies in a jar with Maven .