动态设置系统环境变量 java.lang.UnsatisfiedLinkError: no xxx in java.library.path
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");}}