Question

我正在从浏览器运行applet并收到错误：

    sun/misc/ProxyGenerator
java.lang.NoClassDefFoundError: sun/misc/ProxyGenerator
    at java.lang.reflect.Proxy$ProxyClassFactory.apply(Unknown Source)
    at java.lang.reflect.Proxy$ProxyClassFactory.apply(Unknown Source)
    at java.lang.reflect.WeakCache$Factory.get(Unknown Source)
    at java.lang.reflect.WeakCache.get(Unknown Source)
    at java.lang.reflect.Proxy.getProxyClass0(Unknown Source)
    at java.lang.reflect.Proxy.newProxyInstance(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.annotationForMap(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.parseAnnotation(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.parseAnnotations2(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.parseAnnotations(Unknown Source)
    at java.lang.Class.initAnnotationsIfNecessary(Unknown Source)
    at java.lang.Class.getAnnotation(Unknown Source)
    at sun.reflect.annotation.AnnotationType.<init>(Unknown Source)
    at sun.reflect.annotation.AnnotationType.getInstance(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.parseAnnotation(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.parseAnnotations2(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.parseAnnotations(Unknown Source)
    at java.lang.Class.initAnnotationsIfNecessary(Unknown Source)
    at java.lang.Class.getAnnotation(Unknown Source)
    at com.thoughtworks.xstream.mapper.AnnotationMapper$UnprocessedTypesSet.add(AnnotationMapper.java:481)
    at com.thoughtworks.xstream.mapper.AnnotationMapper$UnprocessedTypesSet.add(AnnotationMapper.java:466)
    at com.thoughtworks.xstream.mapper.AnnotationMapper.processAnnotations(AnnotationMapper.java:142)
    at com.thoughtworks.xstream.XStream.processAnnotations(XStream.java:1576)
    at com.thoughtworks.xstream.XStream.processAnnotations(XStream.java:1587)
    at com.plugin.PluginReader.getOptionalColumnsPluginPOJO(PluginReader.java:242)
    at com.applet.GUIValuesApplet.getOptionalColumns(GUIValuesApplet.java:177)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at sun.plugin.javascript.Trampoline.invoke(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at sun.plugin.javascript.JSClassLoader.invoke(Unknown Source)
    at sun.plugin2.liveconnect.JavaClass$MethodInfo.invoke(Unknown Source)
    at sun.plugin2.liveconnect.JavaClass$MemberBundle.invoke(Unknown Source)
    at sun.plugin2.liveconnect.JavaClass.invoke0(Unknown Source)
    at sun.plugin2.liveconnect.JavaClass.invoke(Unknown Source)
    at sun.plugin2.main.client.LiveConnectSupport$PerAppletInfo$DefaultInvocationDelegate.invoke(Unknown Source)
    at sun.plugin2.main.client.LiveConnectSupport$PerAppletInfo$3.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.plugin2.main.client.LiveConnectSupport$PerAppletInfo.doObjectOp(Unknown Source)
    at sun.plugin2.main.client.LiveConnectSupport$PerAppletInfo$LiveConnectWorker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

如果我从eclipse运行这个applet，它运行正常。我怀疑在jre运行时可能存在jre版本或访问rt.jar的问题。这不是代码相关的问题，因为在我的系统重新启动之前一切正常（它在周末按照公司政策重新启动）。因此，任何设置都可能已更改。

使用的浏览器：Chrome 最新版本的jre on machine：jre7 代码编译使用：jre6

请回答，因为我已经很长时间以来一直面对这个问题。

更新：只是添加，当我尝试使用thinkworks xstream lib中的注释将xml文件读取到Java类时出现此错误

Answer 1

sun.misc是特定于供应商的类，不应在可移植Java代码中使用。

使代码可移植或将浏览器插件切换到Oracle JVM。

Answer 2

看起来我的jre安装已经损坏了。我重新安装它并解决了这个问题。

Applet错误 - java.lang.NoClassDefFoundError：sun / misc / ProxyGenerator

2 个答案: