Mvvmfx: initialize-method causes NoClassDefFoundError: javax/annotation/PostConstruct
Mvvmfx: initialize-method causes NoClassDefFoundError: javax/annotation/PostConstruct
我正在尝试使用 JavaFx 实现 mvvm 模式。为此，我使用了 mvvmfx 框架。
要使用模型中的数据，我尝试使用 NotificationCenter。当在我的 viewModel 中插入一个 initialize-method 来订阅消息时，我得到一个异常：NoClassDefFoundError: javax/annotation/PostConstruct.
如果有人能告诉我我做错了什么，我将不胜感激。
这是我的视图模型：
@Singleton
public class BasementVM implements ViewModel {
@Inject
private NotificationCenter notificationCenter;
private NotificationObserver observer; // 1
private StringProperty basementViewKesselTempLbl = new SimpleStringProperty("27");
public StringProperty KesselTemperatur(){
return basementViewKesselTempLbl;
}
public String getKesselTemperatur(){
return basementViewKesselTempLbl.get();
}
public void setKesselTemperatur(String message){
basementViewKesselTempLbl.set(message);
}
public void initialize() {
// 2
observer = (key, payload) -> {
setKesselTemperatur(payload.toString());
};
notificationCenter.subscribe("test", new WeakNotificationObserver(observer)); // 3
}
}
这是我启动应用程序的地方
public class Main extends MvvmfxGuiceApplication{
private static Logger logger = Logger.getLogger(Main.class);
@Override
public void startMvvmfx(Stage stage) throws Exception {
stage.setTitle("Hello World Application");
ViewTuple<DashBoardView, DashBoardVM> viewTuple = FluentViewLoader.fxmlView(DashBoardView.class).load();
Parent root = viewTuple.getView();
stage.setScene(new Scene(root));
stage.show();
}
public static void main(String[] args) {
Application.launch(args);
}
}
这里是 Stacktrace：
java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:473)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:372)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:945)
Caused by: java.lang.RuntimeException: Exception in Application start method
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:973)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication(LauncherImpl.java:198)
at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: java.lang.NoClassDefFoundError: javax/annotation/PostConstruct
at de.saxsys.mvvmfx.internal.viewloader.ViewLoaderReflectionUtils.lambda$initializeViewModel(ViewLoaderReflectionUtils.java:397)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1380)
at de.saxsys.mvvmfx.internal.viewloader.ViewLoaderReflectionUtils.initializeViewModel(ViewLoaderReflectionUtils.java:395)
at de.saxsys.mvvmfx.internal.viewloader.FxmlViewLoader.lambda$handleInjection[=12=](FxmlViewLoader.java:324)
at de.saxsys.mvvmfx.internal.viewloader.ViewLoaderReflectionUtils.lambda$createAndInjectViewModel(ViewLoaderReflectionUtils.java:272)
at de.saxsys.mvvmfx.internal.viewloader.ReflectionUtils.lambda$accessMember(ReflectionUtils.java:165)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at de.saxsys.mvvmfx.internal.viewloader.ReflectionUtils.accessMember(ReflectionUtils.java:161)
at de.saxsys.mvvmfx.internal.viewloader.ViewLoaderReflectionUtils.createAndInjectViewModel(ViewLoaderReflectionUtils.java:264)
at de.saxsys.mvvmfx.internal.viewloader.FxmlViewLoader.handleInjection(FxmlViewLoader.java:329)
at de.saxsys.mvvmfx.internal.viewloader.FxmlViewLoader.access[=12=]0(FxmlViewLoader.java:48)
at de.saxsys.mvvmfx.internal.viewloader.FxmlViewLoader$DefaultControllerFactory.call(FxmlViewLoader.java:311)
at de.saxsys.mvvmfx.internal.viewloader.FxmlViewLoader$DefaultControllerFactory.call(FxmlViewLoader.java:286)
at javafx.fxml/javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:938)
at javafx.fxml/javafx.fxml.FXMLLoader$InstanceDeclarationElement.processAttribute(FXMLLoader.java:980)
at javafx.fxml/javafx.fxml.FXMLLoader$Element.processStartElement(FXMLLoader.java:227)
at javafx.fxml/javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:752)
at javafx.fxml/javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2722)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2552)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2466)
at javafx.fxml/javafx.fxml.FXMLLoader.access00(FXMLLoader.java:105)
at javafx.fxml/javafx.fxml.FXMLLoader$IncludeElement.constructValue(FXMLLoader.java:1154)
at javafx.fxml/javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:754)
at javafx.fxml/javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2722)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2552)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2466)
at javafx.fxml/javafx.fxml.FXMLLoader.load(FXMLLoader.java:2435)
at de.saxsys.mvvmfx.internal.viewloader.FxmlViewLoader.loadFxmlViewTuple(FxmlViewLoader.java:171)
at de.saxsys.mvvmfx.internal.viewloader.FxmlViewLoader.loadFxmlViewTuple(FxmlViewLoader.java:82)
Disconnected from the target VM, address: '127.0.0.1:59447', transport: 'socket'
at de.saxsys.mvvmfx.FluentViewLoader$FxmlViewStep.load(FluentViewLoader.java:333)
at de.piepnitz.MaltPie.Main.startMvvmfx(Main.java:35)
at de.saxsys.mvvmfx.guice.MvvmfxGuiceApplication.start(MvvmfxGuiceApplication.java:91)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication1(LauncherImpl.java:919)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runAndWait(PlatformImpl.java:449)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater(PlatformImpl.java:418)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater(PlatformImpl.java:417)
at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop(WinApplication.java:175)
... 1 more
Caused by: java.lang.ClassNotFoundException: javax.annotation.PostConstruct
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:185)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
... 41 more
提前致谢，
移液器
好的，我发现了问题：
对于 Java 9，javax.annotation 默认情况下不可见，因为它位于单独的模块中。由于 PostConstruct 是 javax.annotation 的一部分，因此不可用。
所以有以下解决方案：
将 Java 8 与 mvvmfx 一起使用。
添加模块
要添加模块，您可以执行以下操作：可以使用在 java.se.ee 模块中声明的 Java SE 和 Java EE 模块的混合集
当前 java.se.ee 包含在标准 JDK 9 中，但默认情况下未启用。可以通过“--add-modules”选项启用这组根模块。有关更多信息，请查看：LogicBic
当我需要 运行 特定供应商 Eclipse 插件的旧 Eclipse 版本时，我看到了这个错误。
我使用（在 Windows 中）一个 bat 文件临时将 Eclipse 的 PATH 更改为 运行 和 Java 8:
SETLOCAL
PATH={path_to_java_8_jre_or_java_8_jdk_bin_folder};%PATH%
eclipse.exe
ENDLOCAL
使用 Eclipse 文件夹设置此 bat 文件“开始于”的快捷方式，这样 Windows 将找到“eclipse.exe”。
我正在尝试使用 JavaFx 实现 mvvm 模式。为此，我使用了 mvvmfx 框架。
要使用模型中的数据，我尝试使用 NotificationCenter。当在我的 viewModel 中插入一个 initialize-method 来订阅消息时，我得到一个异常：NoClassDefFoundError: javax/annotation/PostConstruct.
如果有人能告诉我我做错了什么，我将不胜感激。
这是我的视图模型：
@Singleton
public class BasementVM implements ViewModel {
@Inject
private NotificationCenter notificationCenter;
private NotificationObserver observer; // 1
private StringProperty basementViewKesselTempLbl = new SimpleStringProperty("27");
public StringProperty KesselTemperatur(){
return basementViewKesselTempLbl;
}
public String getKesselTemperatur(){
return basementViewKesselTempLbl.get();
}
public void setKesselTemperatur(String message){
basementViewKesselTempLbl.set(message);
}
public void initialize() {
// 2
observer = (key, payload) -> {
setKesselTemperatur(payload.toString());
};
notificationCenter.subscribe("test", new WeakNotificationObserver(observer)); // 3
}
}
这是我启动应用程序的地方
public class Main extends MvvmfxGuiceApplication{
private static Logger logger = Logger.getLogger(Main.class);
@Override
public void startMvvmfx(Stage stage) throws Exception {
stage.setTitle("Hello World Application");
ViewTuple<DashBoardView, DashBoardVM> viewTuple = FluentViewLoader.fxmlView(DashBoardView.class).load();
Parent root = viewTuple.getView();
stage.setScene(new Scene(root));
stage.show();
}
public static void main(String[] args) {
Application.launch(args);
}
}
这里是 Stacktrace：
java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:473)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:372)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:945)
Caused by: java.lang.RuntimeException: Exception in Application start method
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:973)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication(LauncherImpl.java:198)
at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: java.lang.NoClassDefFoundError: javax/annotation/PostConstruct
at de.saxsys.mvvmfx.internal.viewloader.ViewLoaderReflectionUtils.lambda$initializeViewModel(ViewLoaderReflectionUtils.java:397)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1380)
at de.saxsys.mvvmfx.internal.viewloader.ViewLoaderReflectionUtils.initializeViewModel(ViewLoaderReflectionUtils.java:395)
at de.saxsys.mvvmfx.internal.viewloader.FxmlViewLoader.lambda$handleInjection[=12=](FxmlViewLoader.java:324)
at de.saxsys.mvvmfx.internal.viewloader.ViewLoaderReflectionUtils.lambda$createAndInjectViewModel(ViewLoaderReflectionUtils.java:272)
at de.saxsys.mvvmfx.internal.viewloader.ReflectionUtils.lambda$accessMember(ReflectionUtils.java:165)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at de.saxsys.mvvmfx.internal.viewloader.ReflectionUtils.accessMember(ReflectionUtils.java:161)
at de.saxsys.mvvmfx.internal.viewloader.ViewLoaderReflectionUtils.createAndInjectViewModel(ViewLoaderReflectionUtils.java:264)
at de.saxsys.mvvmfx.internal.viewloader.FxmlViewLoader.handleInjection(FxmlViewLoader.java:329)
at de.saxsys.mvvmfx.internal.viewloader.FxmlViewLoader.access[=12=]0(FxmlViewLoader.java:48)
at de.saxsys.mvvmfx.internal.viewloader.FxmlViewLoader$DefaultControllerFactory.call(FxmlViewLoader.java:311)
at de.saxsys.mvvmfx.internal.viewloader.FxmlViewLoader$DefaultControllerFactory.call(FxmlViewLoader.java:286)
at javafx.fxml/javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:938)
at javafx.fxml/javafx.fxml.FXMLLoader$InstanceDeclarationElement.processAttribute(FXMLLoader.java:980)
at javafx.fxml/javafx.fxml.FXMLLoader$Element.processStartElement(FXMLLoader.java:227)
at javafx.fxml/javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:752)
at javafx.fxml/javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2722)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2552)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2466)
at javafx.fxml/javafx.fxml.FXMLLoader.access00(FXMLLoader.java:105)
at javafx.fxml/javafx.fxml.FXMLLoader$IncludeElement.constructValue(FXMLLoader.java:1154)
at javafx.fxml/javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:754)
at javafx.fxml/javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2722)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2552)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2466)
at javafx.fxml/javafx.fxml.FXMLLoader.load(FXMLLoader.java:2435)
at de.saxsys.mvvmfx.internal.viewloader.FxmlViewLoader.loadFxmlViewTuple(FxmlViewLoader.java:171)
at de.saxsys.mvvmfx.internal.viewloader.FxmlViewLoader.loadFxmlViewTuple(FxmlViewLoader.java:82)
Disconnected from the target VM, address: '127.0.0.1:59447', transport: 'socket'
at de.saxsys.mvvmfx.FluentViewLoader$FxmlViewStep.load(FluentViewLoader.java:333)
at de.piepnitz.MaltPie.Main.startMvvmfx(Main.java:35)
at de.saxsys.mvvmfx.guice.MvvmfxGuiceApplication.start(MvvmfxGuiceApplication.java:91)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication1(LauncherImpl.java:919)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runAndWait(PlatformImpl.java:449)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater(PlatformImpl.java:418)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater(PlatformImpl.java:417)
at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop(WinApplication.java:175)
... 1 more
Caused by: java.lang.ClassNotFoundException: javax.annotation.PostConstruct
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:185)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
... 41 more
提前致谢， 移液器
好的，我发现了问题：
对于 Java 9，javax.annotation 默认情况下不可见，因为它位于单独的模块中。由于 PostConstruct 是 javax.annotation 的一部分，因此不可用。
所以有以下解决方案：
将 Java 8 与 mvvmfx 一起使用。
添加模块
要添加模块，您可以执行以下操作：可以使用在 java.se.ee 模块中声明的 Java SE 和 Java EE 模块的混合集
当前 java.se.ee 包含在标准 JDK 9 中，但默认情况下未启用。可以通过“--add-modules”选项启用这组根模块。有关更多信息，请查看：LogicBic
当我需要 运行 特定供应商 Eclipse 插件的旧 Eclipse 版本时，我看到了这个错误。 我使用（在 Windows 中）一个 bat 文件临时将 Eclipse 的 PATH 更改为 运行 和 Java 8:
SETLOCAL
PATH={path_to_java_8_jre_or_java_8_jdk_bin_folder};%PATH%
eclipse.exe
ENDLOCAL
使用 Eclipse 文件夹设置此 bat 文件“开始于”的快捷方式，这样 Windows 将找到“eclipse.exe”。