ClassNotFoundException：javax.annotation.使用 JDK 11 生成

Question

我使用来自 Bellsoft 的 JDK 11 在 Apache Netbeans 12.0 中创建了一个 JavaFX Ant 项目。然后我创建了一个与 sqlite 数据库的数据库连接，这是我电脑上的一个文件。该数据库中有两个表。

我右键单击项目并选择“新建->数据库中的实体类...”，然后从表中创建了两个类。现在我想清理并构建项目，但出现此错误。

有人知道如何解决这个问题吗？是因为jdk的原因吗？

Consult the following stack trace for details.
java.lang.NoClassDefFoundError: javax/annotation/Generated
    at org.eclipse.persistence.internal.jpa.modelgen.MetadataMirrorFactory.setEnvironments(MetadataMirrorFactory.java:327)
    at org.eclipse.persistence.internal.jpa.modelgen.CanonicalModelProcessor.process(CanonicalModelProcessor.java:368)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.callProcessor(JavacProcessingEnvironment.java:980)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.discoverAndRunProcs(JavacProcessingEnvironment.java:896)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment$Round.run(JavacProcessingEnvironment.java:1222)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.doProcessing(JavacProcessingEnvironment.java:1334)
    at com.sun.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:1258)
    at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:936)
    at com.sun.tools.javac.main.Main.compile(Main.java:311)
    at com.sun.tools.javac.main.Main.compile(Main.java:170)
    at com.sun.tools.javac.Main.compile(Main.java:57)
    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:566)
    at org.apache.tools.ant.taskdefs.compilers.Javac13.execute(Javac13.java:57)
    at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:1404)
    at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:1133)
    at org.netbeans.modules.java.source.ant.JavacTask.execute(JavacTask.java:120)
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
    at jdk.internal.reflect.GeneratedMethodAccessor69.invoke(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:99)
    at org.apache.tools.ant.Task.perform(Task.java:350)
    at java.base/java.util.Vector.forEach(Vector.java:1388)
    at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:67)
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
    at jdk.internal.reflect.GeneratedMethodAccessor69.invoke(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:99)
    at org.apache.tools.ant.Task.perform(Task.java:350)
    at org.apache.tools.ant.taskdefs.MacroInstance.execute(MacroInstance.java:391)
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
    at jdk.internal.reflect.GeneratedMethodAccessor69.invoke(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:99)
    at org.apache.tools.ant.Task.perform(Task.java:350)
    at org.apache.tools.ant.Target.execute(Target.java:449)
    at org.apache.tools.ant.Target.performTasks(Target.java:470)
    at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1388)
    at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:36)
    at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
    at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:437)
    at org.apache.tools.ant.taskdefs.CallTarget.execute(CallTarget.java:105)
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
    at jdk.internal.reflect.GeneratedMethodAccessor69.invoke(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:99)
    at org.apache.tools.ant.Task.perform(Task.java:350)
    at org.apache.tools.ant.Target.execute(Target.java:449)
    at org.apache.tools.ant.Target.performTasks(Target.java:470)
    at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1388)
    at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:36)
    at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
    at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:437)
    at org.apache.tools.ant.taskdefs.CallTarget.execute(CallTarget.java:105)
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
    at jdk.internal.reflect.GeneratedMethodAccessor69.invoke(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:99)
    at org.apache.tools.ant.Task.perform(Task.java:350)
    at org.apache.tools.ant.Target.execute(Target.java:449)
    at org.apache.tools.ant.Target.performTasks(Target.java:470)
    at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1388)
    at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:36)
    at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
    at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:437)
    at org.apache.tools.ant.taskdefs.CallTarget.execute(CallTarget.java:105)
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
    at jdk.internal.reflect.GeneratedMethodAccessor69.invoke(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:99)
    at org.apache.tools.ant.Task.perform(Task.java:350)
    at org.apache.tools.ant.Target.execute(Target.java:449)
    at org.apache.tools.ant.Target.performTasks(Target.java:470)
    at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1388)
    at org.apache.tools.ant.Project.executeTarget(Project.java:1361)
    at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
    at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
    at org.apache.tools.ant.module.bridge.impl.BridgeImpl.run(BridgeImpl.java:261)
    at org.apache.tools.ant.module.run.TargetExecutor.run(TargetExecutor.java:574)
    at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:128)
Caused by: java.lang.ClassNotFoundException: javax.annotation.Generated
    at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:471)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
    ... 88 more
BUILD FAILED (total time: 1 second)


  [1]: https://i.stack.imgur.com/V9zor.png

Answer 1

添加以下依赖项并尝试运行：

<dependency>
    <groupId>javax.annotation</groupId>
    <artifactId>javax.annotation-api</artifactId>
    <version>1.3.2</version>
</dependency>

Answer 2

如果您使用 IntelliJ，请尝试检查以下内容： 设置 -> 构建、执行、部署 -> Java 编译器 -> 每个模块字节码版本。

我设置为1.8，我的JDK是11。因为这个冲突，所有的尝试都失败了。