IntelliJ 插件开发：PluginException 无法创建类动作

Question

我正在开发一个用于生成 Builder 模式的 IntelliJ 插件。但是，由于称为 PluginException 的东西，我似乎无法使用该插件。我在与this post 相同的五个步骤中重现了该错误，并且由于没有发布答案，我决定在这个问题中给出一些代码示例（并且我不允许对另一个问题发表评论。这有很多事情要做也有）。

代码可以在here找到。测试插件应该在当前类中生成一个带有 getter 的字段，以及一个新类型 (NumberFactory) 的内部类。我安装插件后得到的stacktrace如下：

*cannot create class "be.koen.wellens.MyBuilderGeneratorAction" [Plugin: be.koen.wellens]: cannot create class "be.koen.wellens.MyBuilderGeneratorAction" [Plugin: be.koen.wellens]
com.intellij.diagnostic.PluginException: cannot create class "be.koen.wellens.MyBuilderGeneratorAction" [Plugin: be.koen.wellens]
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.a(ActionManagerImpl.java:287)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.a(ActionManagerImpl.java:239)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.getAction(ActionManagerImpl.java:232)
    at com.intellij.openapi.actionSystem.DefaultActionGroup.unStub(DefaultActionGroup.java:345)
    at com.intellij.openapi.actionSystem.DefaultActionGroup.getChildren(DefaultActionGroup.java:303)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl$5.compute(ActionManagerImpl.java:1261)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl$5.compute(ActionManagerImpl.java:1254)
    at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:932)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.a(ActionManagerImpl.java:1254)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.preloadActionGroup(ActionManagerImpl.java:1248)
    at com.intellij.codeInsight.generation.actions.GenerateAction.preload(GenerateAction.java:91)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.a(ActionManagerImpl.java:1266)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.a(ActionManagerImpl.java:1269)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.preloadActionGroup(ActionManagerImpl.java:1248)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.c(ActionManagerImpl.java:1236)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.access$200(ActionManagerImpl.java:73)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl$4.run(ActionManagerImpl.java:1220)
    at com.intellij.openapi.application.impl.ApplicationImpl$8.run(ApplicationImpl.java:419)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
    at java.lang.Thread.run(Thread.java:695)
    at com.intellij.openapi.application.impl.ApplicationImpl$1$1.run(ApplicationImpl.java:149)
Caused by: com.intellij.diagnostic.PluginException: be/koen/wellens/MyBuilderGeneratorAction : Unsupported major.minor version 51.0 [Plugin: be.koen.wellens]
    at com.intellij.ide.plugins.cl.PluginClassLoader.b(PluginClassLoader.java:130)
    at com.intellij.ide.plugins.cl.PluginClassLoader.a(PluginClassLoader.java:77)
    at com.intellij.ide.plugins.cl.PluginClassLoader.loadClass(PluginClassLoader.java:66)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:249)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.a(ActionManagerImpl.java:262)
    ... 24 more
Caused by: java.lang.UnsupportedClassVersionError: be/koen/wellens/MyBuilderGeneratorAction : Unsupported major.minor version 51.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:471)
    at com.intellij.util.lang.UrlClassLoader._defineClass(UrlClassLoader.java:195)
    at com.intellij.util.lang.UrlClassLoader.defineClass(UrlClassLoader.java:191)
    at com.intellij.util.lang.UrlClassLoader._findClass(UrlClassLoader.java:167)
    at com.intellij.ide.plugins.cl.PluginClassLoader.b(PluginClassLoader.java:124)
... 30 more*

提前致谢！

科恩

Answer 1

答案由 Meo 给出（谢谢，Meo！）。我所要做的就是使用JDK 1.6 .. 如果生活中的一切都那么简单就好了。 :-)

再一次，非常感谢！