转自:http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4280189
/***
* 该方法基本上解决了动态加载dll路径问题、
* 如java.lang.UnsatisfiedLinkError: no xxx in java.library.path
* @param s 环境变量路径
* @throws IOException
*/
public static void addDir(String s) throws IOException {
try {
Field field = ClassLoader.class.getDeclaredField("usr_paths");
field.setAccessible(true);
String[] paths = (String[]) field.get(null);
for (int i = 0; i < paths.length; i++) {
if (s.equals(paths[i])) {
return;
}
}
String[] tmp = new String[paths.length + 1];
System.arraycopy(paths, 0, tmp, 0, paths.length);
tmp[paths.length] = s;
field.set(null, tmp);
} catch (IllegalAccessException e) {
throw new IOException(
"Failed to get permissions to set library path");
} catch (NoSuchFieldException e) {
throw new IOException(
"Failed to get field handle to set library path");
}
}
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