Question

我已经制作了一个Java Swing GUI并且我试图把它放到一个网站上，我把我的html文件放在lwjgl_jar文件夹中并解决了my previous problem关于无法找到AppletLoader但我现在的问题得到一个新错误：

Permissions for Applet Refused. Please accept the permissions dialogue to allow the applet to continue the loading process.

告诉Java“运行此时”后出现错误。所以我在网上搜索并发现我的问题的解决方案是我的jar文件还没有被签名，这很奇怪，考虑到我使用Slick和lwjgl文件，我认为应该已经签名，但是我的racegame.jar包含了我的applet可能需要签名，所以我跟着this guide to signing jars：

并进入最后一步并键入：jarsigner -keystore myKeystore racegame.jar myself 签署我的racegame.jar，但它说：

jarsigner: unable to open jar file: racegame.jar

我尝试使用的任何其他jar文件也会出现此错误。

为什么不打开jar文件并签名呢？所有其他步骤都遵循并完全按照指南中所示进行测试。

Answer 1

我曾在网上发现这篇关于How to sign the JAR Files的文章，这可能会有一些内容，这可以在某种程度上帮助你。请看一下：

Sign All Applet JAR files

Applets are back! And now applets can do more than ever before thanks to 
signed JAR files. By signing your JARs, you can get access to the filesystem 
and other resources that were previously off-limits, provided the user 
grants your applet those privileges. And signing JAR files is now very easy 
thanks to tools bundled with the JDK. However, be certain to sign all JAR files 
used by your Java applet. If you sign the JAR file with your main applet class, 
your applet will launch. If it later uses classes from another JAR file, though, 
you can run into trouble. If the newly-loaded class tries a restricted operation 
and its JAR file isn't signed, your applet will fail at that point with a 
security exception. Rather than waiting for this and debugging it when it occurs, 
save yourself the trouble and sign all of your JAR files up front.

You can create your own certificate using tools provided by the JDK. 
keytool -genkey -alias mykey lets you create your own certificate. Be sure to 
specify an expiration date far in the future with -validity 1000. The default is 
only 6 months.

Sign your JAR files with jarsigner my.jar mykey (where my.jar is the name of 
the jar file to sign).

Deploy all of your JAR files to a folder on your web server, add an HTML page 
with the applet tag, and let the world enjoy your new applet with powerful 
permissions.

keytool -genkey -v -key store mycompany.keystore -alias myalias_goes_here -keyalg RSA -keysize 2048 -validity 10000

签署我的Jar文件

1 个答案: