Nashorn (org.openjdk.nashorn) 是否支持 Java 17？

如何解决Nashorn (org.openjdk.nashorn) 是否支持 Java 17？

我正在尝试使用 nashorn-core:15.1.1.jar 和 Java 17（预发布 - 构建 27）运行我们产品的 ANT 构建，我得到：

BUILD Failed
java.lang.ExceptionInInitializerError
    at org.openjdk.nashorn.internal.runtime.Context.compile(Context.java:1509)
    at org.openjdk.nashorn.internal.runtime.Context.compileScript(Context.java:1449)
    at org.openjdk.nashorn.internal.runtime.Context.compileScript(Context.java:759)
    at org.openjdk.nashorn.api.scripting.NashornScriptEngine.compileImpl(NashornScriptEngine.java:528)
    at org.openjdk.nashorn.api.scripting.NashornScriptEngine.compileImpl(NashornScriptEngine.java:517)
    at org.openjdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:395)
    at org.openjdk.nashorn.api.scripting.NashornScriptEngine.eval(NashornScriptEngine.java:151)
    at java.scripting/javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:262)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:568)
    at org.apache.tools.ant.util.ReflectUtil.invoke(ReflectUtil.java:108)
    at org.apache.tools.ant.util.ReflectWrapper.invoke(ReflectWrapper.java:81)
    at org.apache.tools.ant.util.optional.JavaxScriptRunner.evaluateScript(JavaxScriptRunner.java:103)
    at org.apache.tools.ant.util.optional.JavaxScriptRunner.executeScript(JavaxScriptRunner.java:67)
    at org.apache.tools.ant.taskdefs.optional.Script.execute(Script.java:52)
    at org.apache.tools.ant.UnkNownElement.execute(UnkNownElement.java:291)
    at jdk.internal.reflect.GeneratedMethodAccessor4.invoke(UnkNown Source)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:568)
    at org.apache.tools.ant.dispatch.dispatchUtils.execute(dispatchUtils.java:106)
    at org.apache.tools.ant.Task.perform(Task.java:348)
    at org.apache.tools.ant.Target.execute(Target.java:392)
    at org.apache.tools.ant.Target.performTasks(Target.java:413)
    at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399)
    at org.apache.tools.ant.Project.executeTarget(Project.java:1368)
    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.Main.runBuild(Main.java:811)
    at org.apache.tools.ant.Main.startAnt(Main.java:217)
    at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
    at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)
Caused by: java.lang.RuntimeException: java.lang.NoSuchMethodException: no such method: sun.misc.Unsafe.defineAnonymousClass(Class,byte[],Object[])Class/invokeVirtual
    at org.openjdk.nashorn.internal.runtime.Context$AnonymousContextCodeInstaller.lambda$getDefineAnonymousClass$0(Context.java:335)
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:318)
    at org.openjdk.nashorn.internal.runtime.Context$AnonymousContextCodeInstaller.getDefineAnonymousClass(Context.java:327)
    at org.openjdk.nashorn.internal.runtime.Context$AnonymousContextCodeInstaller.<clinit>(Context.java:317)
    ... 33 more
Caused by: java.lang.NoSuchMethodException: no such method: sun.misc.Unsafe.defineAnonymousClass(Class,Object[])Class/invokeVirtual
    at java.base/java.lang.invoke.MemberName.makeAccessException(MemberName.java:976)
    at java.base/java.lang.invoke.MemberName$Factory.resolveOrFail(MemberName.java:1117)
    at java.base/java.lang.invoke.MethodHandles$Lookup.resolveOrFail(MethodHandles.java:3643)
    at java.base/java.lang.invoke.MethodHandles$Lookup.findVirtual(MethodHandles.java:2680)
    at org.openjdk.nashorn.internal.runtime.Context$AnonymousContextCodeInstaller.lambda$getDefineAnonymousClass$0(Context.java:329)
    ... 36 more
Caused by: java.lang.NoSuchMethodError: 'java.lang.class sun.misc.Unsafe.defineAnonymousClass(java.lang.class,java.lang.Object[])'
    at java.base/java.lang.invoke.MethodHandleNatives.resolve(Native Method)
    at java.base/java.lang.invoke.MemberName$Factory.resolve(MemberName.java:1085)
    at java.base/java.lang.invoke.MemberName$Factory.resolveOrFail(MemberName.java:1114)
    ... 39 more

我可能为时过早，无法将 Nashorn 与 Java 17 结合使用，但我想我会检查一下。

解决方法

不幸的是，从 Java 15 开始，support for Java Nashorn has been removed 将保持这种状态。从 Java 11 起已经 deprecated。

如果可能，我建议迁移到积极维护的 GraalVM JavaScript。从 Nashhorn 起删除了 Java 15 的主要原因。

Nashorn JavaScript 引擎首先通过 JEP 174 合并到 JDK 8 中，作为 Rhino 脚本引擎的替代品。发布时，它是 ECMAScript-262 5.1 标准的完整实现。随着 ECMAScript 语言构造以及 API 的快速调整和修改，我们发现 Nashorn 难以维护。强>