IP地址使用通配符的验证

Question

String ip = "1.1.&.&";
String WILDCARD_CHARACTER = "&";
String REGEX_IP_ADDRESS_STRING = "(?:(?:"
        + WILDCARD_CHARACTER
        + "|25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:"
        + WILDCARD_CHARACTER + "|25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)";
Pattern p = Pattern.compile(REGEX_IP_ADDRESS_STRING1);
Matcher m = p.matcher(ip);
System.out.println("Does it match? " + m.matches());

使用上面编码的IP验证完美运行。但我想对通配符字符进行一些修改，因为它会引起问题。

当前情况：

• 192.1.&.& ------> True
• 192.1.0.1 ------> True
• & ------> False
• 192.1.& ------> False

期望结果：

• 192.1.&.& ------> False
• 192.1.0.1 ------> True
• & ------> True
• 192.1.& ------> True

即我想在通配符字符后通配所有输入。

有什么正则表达式的修改可以帮助我实现这个目标吗？请有人能帮忙吗？

- niksvp

Answer 1

我建议使用以下内容（在这个正则表达式中，我使用了一个字面值的&；当然，您可以将其更改为您的+ WILDCARD_CHARACTER结构）：

Pattern regex = Pattern.compile(
    "^       # Anchor the match at the start of the string\n" +
    "(?:     # Match either...\n" +
    " &      # the wildcard character\n" +
    " |      # or a number between 0 and 255\n" +
    " (?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\n" +
    " \\.    # followed by a dot, followed by...\n" +
    " (?:    # ...either...\n" +
    "  &     # the wildcard character\n" +
    "  |     # or a number etc. etc.\n" +
    "  (?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\n" +
    "  \\.\n" +
    "  (?:\n" +
    "   &\n" +
    "   |\n" +
    "   (?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\n" +
    "   \\.\n" +
    "   (?:\n" +
    "    &\n" +
    "    |\n" +
    "    (?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\n" +
    "   )\n" +
    "  )\n" +
    " )\n" +
    ")\n" +
    "$        # Anchor the match at the end of the string", 
    Pattern.COMMENTS);

- Tim Pietzcker

Answer 2

(?:2[0-4]\d|25[0-5]|1\d\d|\d\d|\d).(?:2[0-4]\d|25[0-5]|1\d\d|\d\d|\d).(?:2[0-4]\d|25[0-5]|1\d\d|\d\d|\d).(?:2[0-4]\d|25[0-5]|1\d\d|\d\d|\d) |(?:2[0-4]\d|25[0-5]|1\d\d|\d\d|\d).(?:2[0-4]\d|25[0-5]|1\d\d|\d\d|\d).(?:2[0-4]\d|25[0-5]|1\d\d|\d\d|\d).& |(?:2[0-4]\d|25[0-5]|1\d\d|\d\d|\d).(?:2[0-4]\d|25[0-5]|1\d\d|\d\d|\d).& |(?:2[0-4]\d|25[0-5]|1\d\d|\d\d|\d).& |&

所有内容都应该在一行上，以满足您的要求。

- David Mårtensson