为什么我得到java.lang.reflect.InvocationTargetException在浏览器中，但不是在日食applet浏览器？ [英] Why do I get java.lang.reflect.InvocationTargetException in browser but not in eclipse applet viewer?

问题描述

就像标题说：为什么我得到java.lang.reflect.InvocationTargetException在浏览器中，但不是在日食applet浏览器？当我使用HTML加载它运行我的小应用程序（是的，我知道小程序已经过时）在浏览器中，我得到的java.lang.reflect.InvocationTargetException错误。我读这当HTML试图加载的东西是不是一个applet发生，但是当我运行它在Eclipse一个applet它的工作原理（带来了日食Java小程序浏览器和完美的作品......这就是我的树桩） 。这里是堆栈跟踪：

 了java.lang.RuntimeException：java.lang.reflect.InvocationTargetException
    在com.sun.deploy.uitoolkit.impl.awt.AWTAppletAdapter.runOnEDTAndWait（来源不明）
    在com.sun.deploy.uitoolkit.impl.awt.AWTAppletAdapter.instantiateApplet（来源不明）
    在sun.plugin2.applet.Plugin2Manager.initAppletAdapter（来源不明）
    在sun.plugin2.applet.Plugin2Manager $ AppletExecutionRunnable.run（来源不明）
    在java.lang.Thread.run（Thread.java:745）
java.lang.reflect.InvocationTargetException：产生的原因
    在com.sun.deploy.uitoolkit.impl.awt.OldPluginAWTUtil.invokeAndWait（来源不明）
    ... 5个
java.security.AccessControlException：引起访问被拒绝（java.io.FilePermission中的hq.gif读）
    在java.security.AccessControlContext.checkPermission（AccessControlContext.java:372）
    在java.security.AccessController.checkPermission（AccessController.java:559）
    在java.lang.SecurityManager.checkPermission（SecurityManager.java:549）
    在sun.plugin2.applet.AWTAppletSecurityManager.checkPermission（来源不明）
    在java.lang.SecurityManager.checkRead（SecurityManager.java:888）
    在sun.awt.SunToolkit.getImageFromHash（SunToolkit.java:774）
    在sun.awt.SunToolkit.getImage（SunToolkit.java:790）
    在sun.lwawt.macosx.LWCToolkit.getImage（LWCToolkit.java:471）
    在javax.swing.ImageIcon中的＆LT;＆初始化GT;（ImageIcon.java:147）
    在javax.swing.ImageIcon中的＆LT;＆初始化GT;（ImageIcon.java:174）
    在Application.Game＆LT;＆初始化GT;（Game.java:97）
    在sun.reflect.NativeConstructorAccessorImpl.newInstance0（本机方法）
    在sun.reflect.NativeConstructorAccessorImpl.newInstance（NativeConstructorAccessorImpl.java:57）
    在sun.reflect.DelegatingConstructorAccessorImpl.newInstance（DelegatingConstructorAccessorImpl.java:45）
    在java.lang.reflect.Constructor.newInstance（Constructor.java:526）
    在java.lang.Class.newInstance（Class.java:374）
    在com.sun.deploy.uitoolkit.impl.awt.AWTAppletAdapter $ 1.run（来源不明）
    在java.awt.event.InvocationEvent.dispatch（InvocationEvent.java:302）
    在java.awt.EventQueue.dispatchEventImpl（EventQueue.java:733）
    在java.awt.EventQueue.access $ 200（EventQueue.java:103）
    在java.awt.EventQueue中的$ 3.run（EventQueue.java:694）
    在java.awt.EventQueue中的$ 3.run（EventQueue.java:692）
    在java.security.AccessController.doPrivileged（本机方法）
    在java.security.ProtectionDomain $ 1.doIntersectionPrivilege（​​ProtectionDomain.java:76）
    在java.security.ProtectionDomain $ 1.doIntersectionPrivilege（​​ProtectionDomain.java:87）
    在java.awt.EventQueue中的$ 4.run（EventQueue.java:708）
    在java.awt.EventQueue中的$ 4.run（EventQueue.java:706）
    在java.security.AccessController.doPrivileged（本机方法）
    在java.security.ProtectionDomain $ 1.doIntersectionPrivilege（​​ProtectionDomain.java:76）
    在java.awt.EventQueue.dispatchEvent（EventQueue.java:705）
    在java.awt.EventDispatchThread.pumpOneEventForFilters（EventDispatchThread.java:242）
    在java.awt.EventDispatchThread.pumpEventsForFilter（EventDispatchThread.java:161）
    在java.awt.EventDispatchThread.pumpEventsForHierarchy（EventDispatchThread.java:150）
    在java.awt.EventDispatchThread.pumpEvents（EventDispatchThread.java:146）
    在java.awt.EventDispatchThread.pumpEvents（EventDispatchThread.java:138）
    在java.awt.EventDispatchThread.run（EventDispatchThread.java:91）
 

我的文件结构是这样的：

 的index.html
java.policy.applet
hq.gif
b.gif
k.gif
应用程序（这是包）/
     Game.java
     Game.class
     等等
 

我java.policy.applet

  {补助
  权限java.security.AllPermission;
};
 

解决方案

 的InvocationTargetException是一个通用的。实际的例外是
 

  

致：java.security.AccessControlException：拒绝访问
  （java.io.FilePermission中的hq.gif读）

我以为是什么，你需要管理员权限的同时，除了签名的jar运行小程序。

你能包括以下code，所描述的<一个href=\"http://stackoverflow.com/questions/16590269/accesscontrolexception-access-denied-filepermission\">here

 在AccessController.doPrivileged（新的PrivilegedAction（）{
    公共对象的run（）{
        //这里执行安全敏感的操作
        返回null;
    }
}）;
 

Just like the title says: Why do I get java.lang.reflect.InvocationTargetException in browser but not in eclipse applet viewer? When I run my applet (yes, i know applets are outdated) in the browser using html to load it, i get the java.lang.reflect.InvocationTargetException error. I read that this happens when the HTML is trying to load something that is not an applet, but it works when I run it as an applet in eclipse (brings up eclipse java applet viewer and works perfect...that is what stumps me). Here is the stack trace:

java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
    at com.sun.deploy.uitoolkit.impl.awt.AWTAppletAdapter.runOnEDTAndWait(Unknown Source)
    at com.sun.deploy.uitoolkit.impl.awt.AWTAppletAdapter.instantiateApplet(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager.initAppletAdapter(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.reflect.InvocationTargetException
    at com.sun.deploy.uitoolkit.impl.awt.OldPluginAWTUtil.invokeAndWait(Unknown Source)
    ... 5 more
Caused by: java.security.AccessControlException: access denied ("java.io.FilePermission" "hq.gif" "read")
    at java.security.AccessControlContext.checkPermission(AccessControlContext.java:372)
    at java.security.AccessController.checkPermission(AccessController.java:559)
    at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
    at sun.plugin2.applet.AWTAppletSecurityManager.checkPermission(Unknown Source)
    at java.lang.SecurityManager.checkRead(SecurityManager.java:888)
    at sun.awt.SunToolkit.getImageFromHash(SunToolkit.java:774)
    at sun.awt.SunToolkit.getImage(SunToolkit.java:790)
    at sun.lwawt.macosx.LWCToolkit.getImage(LWCToolkit.java:471)
    at javax.swing.ImageIcon.<init>(ImageIcon.java:147)
    at javax.swing.ImageIcon.<init>(ImageIcon.java:174)
    at Application.Game.<init>(Game.java:97)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
    at java.lang.Class.newInstance(Class.java:374)
    at com.sun.deploy.uitoolkit.impl.awt.AWTAppletAdapter$1.run(Unknown Source)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:302)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
    at java.awt.EventQueue.access$200(EventQueue.java:103)
    at java.awt.EventQueue$3.run(EventQueue.java:694)
    at java.awt.EventQueue$3.run(EventQueue.java:692)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
    at java.awt.EventQueue$4.run(EventQueue.java:708)
    at java.awt.EventQueue$4.run(EventQueue.java:706)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

My file structure is like this:

index.html
java.policy.applet
hq.gif
b.gif
k.gif
Application (this is the package)/
     Game.java
     Game.class
     ETC

My java.policy.applet

grant {
  permission java.security.AllPermission;
};

解决方案

InvocationtargetException is a generic one. The actual exception is 

Caused by: java.security.AccessControlException: access denied ("java.io.FilePermission" "hq.gif" "read")

What I assume is, you would need admin priviledges while running the applet in addition to the signed jar.

Can you incorporate the following code, as described here

AccessController.doPrivileged(new PrivilegedAction() {
    public Object run() {
        // perform the security-sensitive operation here
        return null;
    }
});

这篇关于为什么我得到java.lang.reflect.InvocationTargetException在浏览器中，但不是在日食applet浏览器？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！