java - Java 路径中的星号

Question

我正在阅读 OCA/OCP Java SE & Programmer I & II 学习指南。在第 520 页上有一种用于匹配的方法:

public void matches(Path path, String glob){
    PathMatcher matcher = FileSystems.getDefault().getPathMatcher(glob);
    System.out.println(matcher.matches(path));
}

现在，在下一页中有一段使用此方法的代码:

public static void main(String [] args){
    Path path1= Paths.get("0*b/test/1");
    Path path2 = Paths.get("9\\*b/test/1");
    Path path3 = Paths.get("01b/test/1");
    Path path4 = Paths.get("0*b/1");
    String glob = "glob:[0-9]\\*{A*,b}/**/1";
    matches(path1,glob);
    matches(path2,glob);
    matches(path3,glob);
    matches(path4,glob);
}

根据书上的结果应该是:真的错误的错误的假的

但是，当我尝试运行它时，出现以下异常:

Exception in thread "main" java.nio.file.InvalidPathException: Illegal char <*> at index 1:       0*b/test/1
    at sun.nio.fs.WindowsPathParser.normalize(WindowsPathParser.java:182)
    at sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:153)
    at sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:77)
    at sun.nio.fs.WindowsPath.parse(WindowsPath.java:94)
    at sun.nio.fs.WindowsFileSystem.getPath(WindowsFileSystem.java:255)
    at java.nio.file.Paths.get(Paths.java:84)
    at pathmatcherobjective.PathMatcherObjective.main(PathMatcherObjective.java:63)
    Java Result: 1

我的问题是:我是否遗漏了设置中的某些内容？我需要启用某些特定功能才能运行它吗？还是这本书错了？我只是在为 Java Professional 考试而学习，所以我不确定所有事情。

Answer 1

在 Windows 操作系统上，字符 * 不允许用于有效的文件和目录名称。 Microsoft Developer Network 上列出的字符也是如此:

You can use any character in the current code page for a name, including Unicode characters and characters in the extended character set (128–255), except for the following reserved characters:

• < (less than)
• > (greater than)
• : (colon)
• " (double quote)
• / (forward slash)
• \ (backslash)
• | (vertical bar or pipe)
• ? (question mark)
• * (asterisk)
• Integer value zero, sometimes referred to as the ASCII NUL character.
• Characters whose integer representations are in the range from 1 through 31, except for alternate data streams where these characters are allowed. For more information about file streams, see File Streams.
• Any other character that the target file system does not allow.

对于 UNIX，请参阅 Wikipedia .在 POSIX 上，允许的字符包括 A–Z a–z 0–9 。 _ -，保留为/null。

可能是在允许 * 的操作系统上运行的示例。