Applet and ClassPathResource problem

[David Woon]

Please help me. When I call following code:

    private void btnSubmitActionPerformed(java.awt.event.ActionEvent evt) {                                          
        System.out.println("User Name: " + txtUserName.getText());
        XmlBeanFactory beanFactory = null;
        ClassPathResource resource = new ClassPathResource(myappclient/RemotingBean.xml");
    }

error occur as following:

Exception in thread "AWT-EventQueue-10" java.lang.ExceptionInInitializerError
	at org.springframework.util.ClassUtils.<clinit>(ClassUtils.java:73)
	at org.springframework.core.io.ClassPathResource.<init>(ClassPathResource.java:82)
	at org.springframework.core.io.ClassPathResource.<init>(ClassPathResource.java:64)
	at myappclient.LoginPanel.btnSubmitActionPerformed(LoginPanel.java:92)
	at myappclient.LoginPanel.access$000(LoginPanel.java:21)
	at myappclient.LoginPanel$1.actionPerformed(LoginPanel.java:52)
	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
	at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
	at java.awt.Component.processMouseEvent(Unknown Source)
	at javax.swing.JComponent.processMouseEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: java.security.AccessControlException: access denied (java.util.PropertyPermission org.apache.commons.logging.LogFactory.HashtableImpl read)
	at java.security.AccessControlContext.checkPermission(Unknown Source)
	at java.security.AccessController.checkPermission(Unknown Source)
	at java.lang.SecurityManager.checkPermission(Unknown Source)
	at java.lang.SecurityManager.checkPropertyAccess(Unknown Source)
	at java.lang.System.getProperty(Unknown Source)
	at org.apache.commons.logging.LogFactory.createFactoryStore(LogFactory.java:320)
	at org.apache.commons.logging.LogFactory.<clinit>(LogFactory.java:1725)
	... 30 more

[Ulf Dittmer]

Applets don't have access to most system properties for security reasons; it looks like the Apache Commons Logging library is not compatible with that. Generally that makes sense, since most logging goes to files, and applets can't access the local file system.

[David Woon]

so... how to solve this problem?

[Ulf Dittmer]

Do you need to use Spring?

Alternatively, if the applet really does so much that Spring is called for, then a signed applet (or JavaWebStart application) may be more appropriate. Signing would get around the security restrictions.

[Jadson Santos]

First of all, you need to signed your Applet to Access local files.


In second, "Caused by: java.security.AccessControlException: access denied (java.util.PropertyPermission org.apache.commons.logging.LogFactory.HashtableImpl read"

is a error in the commons-logging-1.1.jar, I updated to commons-logging-1.1.1.jar and revolved the problem of AccessControlException.