java - 在 Eclipse 中导入 JAI 的问题

Question

我正在尝试在 Mac OS X 10.6 上运行的 Eclipse 中使用以下导入:

import javax.media.jai.JAI;

不幸的是，这不起作用，而是我收到以下消息:

“访问限制:由于所需库/System/Library/Java/Extensions/jai_core.jar 的限制，无法访问类型 JAI”

如何解决？我想使用 JAI.create("fileload", "filename");

文件夹Extensions中的文件权限:

$ ls -l
total 20536
-rwxrwxr-x  1 root  wheel     6470  6 Jan 19:20 AppleScriptEngine.jar
-rwxrwxr-x  1 root  wheel    12838 23 Apr 18:16 MRJToolkit.jar
-rwxrwxr-x  1 root  wheel   938700  3 Mar 01:41 QTJava.zip
-rwxrwxr-x  1 root  wheel    17786 11 Feb 13:49 dns_sd.jar
-rwxrwxr-x  1 root  wheel  1223487 21 Jul  2009 j3daudio.jar
-rwxrwxr-x  1 root  wheel  1157342 21 Jul  2009 j3dcore.jar
-rwxrwxr-x  1 root  wheel   685292 21 Jul  2009 j3dutils.jar
-rwxrwxr-x  1 root  wheel   275486 18 May  2009 jai_codec.jar
-rwxrwxr-x  1 root  wheel  1544537 18 May  2009 jai_core.jar
-rwxrwxr-x  1 root  wheel   106688  6 Jan 19:20 libAppleScriptEngine.jnilib
-rwxrwxr-x  1 root  wheel   427632 21 Jul  2009 libJ3D.jnilib
-rwxrwxr-x  1 root  wheel   733280 21 Jul  2009 libJ3DAudio.jnilib
-rwxrwxr-x  1 root  wheel    50880 21 Jul  2009 libJ3DUtils.jnilib
-rwxrwxr-x  1 root  wheel  1004544  3 Mar 01:44 libQTJNative.jnilib
-rwxrwxr-x  1 root  wheel    50352 23 Dec 10:25 libShark.jnilib
-rwxrwxr-x  1 root  wheel  9959424 18 May  2009 libmlib_jai.jnilib
-rwxrwxr-x  1 root  wheel    41239 18 May  2009 mlibwrapper_jai.jar
-rwxrwxr-x  1 root  wheel   127628 21 Jul  2009 vecmath.jar

可在此处找到快速修复:http://lkamal.blogspot.com/2008/09/eclipse-access-restriction-on-library.html (但是，它更像是一种解决方法...)

Answer 1

您可以检查文件的权限。这是 10.5 的样子:

$ ls -l /System/Library/Java/Extensions/jai_core.jar-rw-r--r--  1 root  wheel  1893836 May 31  2008 /System/Library/Java/Extensions/jai_core.jar