Java 正则表达式在任何位置有一个匹配和两个否定

Question

我必须匹配关键字，前提是它不在复合 URL 或某些单词的句子中。比如关键字.NET，字符串不能有http://，.NET后面的字符 不能是 work 或 flix，但可以是 framework 或任何其他词，甚至什么都没有。正则表达式必须不区分大小写。

我有这些例子可以匹配：

框架.NET
也就是.NETFramework
微软.NET
.NET框架（更新）
.net框架（更新）
.net（更新）

这些例子不匹配：

这是一个URLhttp://www.my.net/不匹配
网络不匹配，因为缺少点
.NET工作完成
Microsoft.NetworkAndSharingCenter
4df9e0f8.netflix_mcm4njqhnhss8
.net工作（更新）
.Net工作（更新）

我写过这个模式：

(?i)(.*)(?!.*http\:\/\/.*)(\.net)(?!.*work)(?!.*flix)(.*)

我已经在下面编写了这些测试用例的代码，但是 testMatch_02() 和 testNotMatch_01() 都失败了，我无法弄清楚原因。

更新 1

我又添加了三个测试用例：testNotMatch_03()、testNotMatch_04() 和 testNotMatch_05()。他们运行ning 可以针对给定的正则表达式。但是 testMatch_02() 和 testNotMatch_01() 仍然如前所述失败。我决定添加这些新的测试用例，以澄清在 .NET.

之前并不总是会有 space

更新 2

我已经将一些模式从 (?i)(.*)(?!.*http\:\/\/.*)(\.net)(?!.*work)(?!.*flix)(.*) 更改为 (?i)(.*)(?!http\:\/\/)(.*)(\.net)(?!work|flix)(.*)。因此所有测试用例运行 OK 除了 testNotMatch_01()。我已经更新了测试代码，以防万一有人想要运行使用这个新模式。

更新 3

拜托，我将非常感谢是否有人运行之前的测试用例并根据它做出假设。我们可以避免在聊天对话中提出这个问题。

更新 4

重要的是，不仅列出的示例必须通过，而且正则表达式必须根据问题的原始措辞中描述的内容进行验证。在与@Thomas 交谈后，我在下面的代码中包含了三个新的匹配示例和两个新的不匹配示例，以及每个示例的测试用例，以及@Thomas 提供的正则表达式。此外，我已将代码更改为类似于@Thomas 提供的代码，更简单更短，作为他的正则表达式。

package com.regex;

public class TestRegex
{
    //private static final String regex = "(?i)(.*)(?!.*http\:\/\/.*)(\.net)(?!.*work)(?!.*flix)(.*)";
    //private static final String regex = "(?i)(.*)(?!http\:\/\/)(.*)(\.net)(?!work|flix)(.*)";
    private static final String regex = "(?i).*( |microsoft).net($|Framework)"; //@Thomas

    public static void main(String[] args)
    {
        String str = "The framework .NET";
        System.out.println("testMatch_01() must match: [" + str + "] =>  " + str.matches(regex));

        str = "That is .NETFramework";
        System.out.println("testMatch_02() must match: [" + str + "] =>  " + str.matches(regex));

        str = "Microsoft.NET";
        System.out.println("testMatch_03() must match: [" + str + "] =>  " + str.matches(regex));

        str = "That is .netframework";
        System.out.println("testMatch_04() must match: [" + str + "] =>  " + str.matches(regex));

        str = ".netframework";
        System.out.println("testMatch_05() must match: [" + str + "] =>  " + str.matches(regex));

        str = ".NETFramework";
        System.out.println("testMatch_06() must match: [" + str + "] =>  " + str.matches(regex));

        str = "This is a URL http://www.my.net";
        System.out.println("testNotMatch_01() must not match: [" + str + "] =>  " + str.matches(regex));

        str = "The Network isn't matching because the missing point";
        System.out.println("testNotMatch_02() must not match: [" + str + "] =>  " + str.matches(regex));

        str = "The .NETwork is up";
        System.out.println("testNotMatch_03() must not match: [" + str + "] =>  " + str.matches(regex));

        str = "Microsoft.NetworkAndSharingCenter";
        System.out.println("testNotMatch_04() must not match: [" + str + "] =>  " + str.matches(regex));

        str = "4df9e0f8.netflix_mcm4njqhnhss8";
        System.out.println("testNotMatch_05() must not match: [" + str + "] =>  " + str.matches(regex));
    }

}

以上代码的输出为：

使用正则表达式 (?i)(.*)(?!http\:\/\/)(.*)(\.net)(?!work|flix)(.*)
testNotMatch_01()失败

testMatch_01() must match: [The framework .NET] =>  true
testMatch_02() must match: [That is .NETFramework] =>  true
testMatch_03() must match: [Microsoft.NET] =>  true
testMatch_04() must match: [That is .netframework] =>  true
testMatch_05() must match: [.netframework] =>  true
testMatch_06() must match: [.NETFramework] =>  true
testNotMatch_01() must not match: [This is a URL http://www.my.net] =>  true
testNotMatch_02() must not match: [The Network isn't matching because the missing point] =>  false
testNotMatch_03() must not match: [The .NETwork is up] =>  false
testNotMatch_04() must not match: [Microsoft.NetworkAndSharingCenter] =>  false
testNotMatch_05() must not match: [4df9e0f8.netflix_mcm4njqhnhss8] =>  false

使用正则表达式 (?i).*( |microsoft).net($|Framework)
testMatch_05() 和 testMatch_06() 失败

testMatch_01() must match: [The framework .NET] =>  true
testMatch_02() must match: [That is .NETFramework] =>  true
testMatch_03() must match: [Microsoft.NET] =>  true
testMatch_04() must match: [That is .netframework] =>  true
testMatch_05() must match: [.netframework] =>  false
testMatch_06() must match: [.NETFramework] =>  false
testNotMatch_01() must not match: [This is a URL http://www.my.net] =>  false
testNotMatch_02() must not match: [The Network isn't matching because the missing point] =>  false
testNotMatch_03() must not match: [The .NETwork is up] =>  false
testNotMatch_04() must not match: [Microsoft.NetworkAndSharingCenter] =>  false
testNotMatch_05() must not match: [4df9e0f8.netflix_mcm4njqhnhss8] =>  false

Answer 1

此正则表达式适用于您的所有示例：

^(?i)(?!.*http:\/\/).*?\.net(?!work|flix).*

参见live demo。

请注意，您的负面示例 "The Network isn't matching because the missing point" 具有误导性，因为它也不应该匹配，因为“.net”后跟 "work"。

Java 正则表达式在任何位置有一个匹配和两个否定

Java Regex with one matching and two negations in any position

java

regex

case-insensitive

regex-negation