我在嘗試使用小程序時遇到了java.lang.SecurityException: Permission denied: file:////Videos/public/scripts/screenshot.jar
。獲取SecurityException:Java中的權限被拒絕
這裏是applet代碼:
<applet code="Screenshot" archive="file:////Videos/public/scripts/screenshot.jar" width="100px" height="100px">
</applet>
如何解決呢,什麼問題,甚至手段?
編輯:
從我看到我需要簽署的小程序。有人能解釋這是如何以及爲什麼這樣做的?該網站提供的解釋不好,因爲它甚至沒有解決這個事實,即我將其嵌入到我的網站中,並希望每個客戶端都使用它,而不必簽署任何內容。只需點擊運行。
EDIT2:
/*
By Bavo Bruylandt (Http://www.realapplets.com")
*/
// and now The inevidable "Hello World" example :)
// tell the compiler where to find the methods you will use.
// required when you create an applet
import java.applet.*;
// required to paint on screen
import java.awt.*;
// the start of an applet - HelloWorld will be the executable class
// Extends applet means that you will build the code on the standard Applet class
public class Screenshot extends Applet
{
// The method that will be automatically called when the applet is started
public void init()
{
// It is required but does not need anything.
}
// This method gets called when the applet is terminated
// That's when the user goes to another page or exits the browser.
public void stop()
{
// no actions needed here now.
}
// The standard method that you have to use to paint things on screen
// This overrides the empty Applet method, you can't called it "display" for example.
public void paint(Graphics g)
{
//method to draw text on screen
// String first, then x and y coordinate.
g.drawString("Hey hey hey",20,20);
g.drawString("Hellooow World",20,40);
}
}
您很有可能只需[簽署applet](http://java.sun.com/developer/onlineTraining/Programming/JDCBook/signed的.html)。 – 2012-02-15 08:05:25
我是否必須爲每個小程序執行此操作?那些已經安裝的工具(如keytool) – Vadiklk 2012-02-15 08:17:26
還有一些可以閱讀:[Applets可以做什麼和不可以做什麼](http://docs.oracle.com/javase/tutorial/deployment/applet/security.html) – 2012-02-15 08:32:40