查看oracle app并获取：java.lang.ClassNotFoundException：oracle.forms.engine.Main

我正在尝试调试oracle表单应用程序。 在生产中，当我加载应用程序时，我收到一个错误：java.lang.ClassNotFoundException：oracle.forms.engine.Main

我不确定导致这个问题的原因。 我现在一直在搜索论坛半天，看起来它可能与java版本问题有关。

我已经包含了（略微修改以保护我的公司）java控制台输出，如果我正确读取它，看起来像证书需要重新打包。
但是，当我查看该网站的证书时，它表示已通过verisignvalidation。

我正在使用IE 9来尝试查看表单应用程序，我得到一个：java.lang.ClassNotFoundException：oracle.forms.engine.Main

在Java控制台中，我得到以下输出：

Java Plug-in 1.6.0_45 Using JRE version 1.6.0_45-b06 Java HotSpot(TM) Client VM User home directory = C:\Users\my_username network: Cache entry not found [url: https://company_site.ca:4446/forms/java/frmall.jar, version: null] network: Connecting https://company_site.ca:4446/forms/java/frmall.jar with proxy=DIRECT network: Connecting http://company_site.ca:4446/ with proxy=DIRECT javax.net.ssl.SSLException: Received fatal alert: unexpected_message at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Unknown Source) at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Unknown Source) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.recvAlert(Unknown Source) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source) at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source) at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source) at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(Unknown Source) at sun.plugin.PluginURLJarFileCallBack.connect(Unknown Source) at sun.plugin.PluginURLJarFileCallBack.retrieve(Unknown Source) at sun.net.www.protocol.jar.URLJarFile.retrieve(Unknown Source) at sun.net.www.protocol.jar.URLJarFile.getJarFile(Unknown Source) at sun.net.www.protocol.jar.JarFileFactory.get(Unknown Source) at sun.net.www.protocol.jar.JarURLConnection.connect(Unknown Source) at sun.plugin.net.protocol.jar.CachedJarURLConnection.connect(Unknown Source) at sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFileInternal(Unknown Source) at sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFile(Unknown Source) at com.sun.deploy.security.DeployURLClassPath$JarLoader.getJarFile(Unknown Source) at com.sun.deploy.security.DeployURLClassPath$JarLoader.access$1000(Unknown Source) at com.sun.deploy.security.DeployURLClassPath$JarLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at com.sun.deploy.security.DeployURLClassPath$JarLoader.ensureOpen(Unknown Source) at com.sun.deploy.security.DeployURLClassPath$JarLoader.(Unknown Source) at com.sun.deploy.security.DeployURLClassPath$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at com.sun.deploy.security.DeployURLClassPath.getLoader(Unknown Source) at com.sun.deploy.security.DeployURLClassPath.getLoader(Unknown Source) at com.sun.deploy.security.DeployURLClassPath.getResource(Unknown Source) at sun.plugin2.applet.Plugin2ClassLoader$2.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at sun.plugin2.applet.Plugin2ClassLoader.findClassHelper(Unknown Source) at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source) at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source) at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source) at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source) at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source) at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source) at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source) at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source) at java.lang.Thread.run(Unknown Source) ... 3 more javax.net.ssl.sslexceptions network: Cache entry not found [url: https://company_site.ca:4446/forms/java/, version: null] network: Cache entry not found [url: https://company_site.ca:4446/forms/java/oracle/forms/engine/Main.class, version: null] network: Connecting https://company_site.ca:4446/forms/java/oracle/forms/engine/Main.class with proxy=DIRECT network: Connecting http://company_site.ca:4446/ with proxy=DIRECT network: Cache entry not found [url: https://company_site.ca:4446/forms/java/oracle/forms/engine/Main.class, version: null] network: Connecting https://company_site.ca:4446/forms/java/oracle/forms/engine/Main.class with proxy=DIRECT network: Connecting http://company_site.ca:4446/ with proxy=DIRECT basic: load: class oracle.forms.engine.Main not found. load: class oracle.forms.engine.Main not found. java.lang.ClassNotFoundException: oracle.forms.engine.Main at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source) at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source) at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source) at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source) at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source) at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Exception: java.lang.ClassNotFoundException: oracle.forms.engine.Main Ignored exception: java.lang.ClassNotFoundException: oracle.forms.engine.Main basic: Loading Java Applet Failed...

这是Java版本问题，还是服务器端的问题？ java有没有明显的原因找不到oracle表单引擎？

对长而粗略的文字表示歉意，但我猜这需要弄清楚这里发生了什么。

非常感谢您给予的任何帮助或指导！

Answer 1

我找到了解决这个问题的方法 – 不是真正的解决方案，但我在IT方面已经足够接近了。

我使用的是Java 7u51。
我进入了控制面板 – > Java – > Advanced

在我选择的高级安全设置下：

 Use SSL 2.0 ClientHello format Use SSL 3.0 Use TLS 1.0 

（那些恰好是服务器接受的连接类型）

我也进入了安全选项卡，并将该​​站点添加到exception站点列表中

最后，我进入Java选项卡并单击View。 然后我从已安装的JRE中取消选择Java 1.7.0_51。

在卸载和禁用其他版本的java时，我并不完全清楚所有这些是如何/为什么有效的。 但我很高兴让网站重新开始工作。

希望这将有助于其他人。

Answer 2

我有同样的问题，我通过在我的oracle 12c表单中重新附加我的webutil来解决我的问题，现在工作正常。