Giving Java Applet access to images on a webserver

I am building a Java Ap开发者_运维知识库plet that is running local that needs to access a couple of images on my webserver. How can i load images from a given webserver in java?

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Use Image i = getAppletContext().getImage(new URL("...."));. Note that per the default Applet security policy, you will be able to access only URLs that reside on the same host as the applet.

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If you wish to access images on another server, you need to edit the java.policy of the JRE that your browser java plug-in is using. For example, on a windows machine with Java 6, this will normally be:

%PROGRAM FILES%\Java\jre6\lib\security\java.policy

For example, to give socket permissions for connecting to an image server, to applets originating from localhost, you'd add something like this to the java policy file:

grant codeBase "http://localhost/-" {
      permission java.net.SocketPermission "imgserver.company.com", "connect, resolve";
};

Where imgserver.company.com is the server your applet needs to connect to in order to fetch the images.

DISCLAIMER: Careful when editing the java policy for your browser, because potentially you could be giving more permissions to not just your own applet, but to other, malicious applets.