我应该如何编写正则表达式来匹配Java中的特定单词？

我一直试图让一个特定的正则表达式工作，但我不能让它做我需要的

我想在给定的字符串中查找OFF。我希望正则表达式只匹配关闭的字符串。我希望RegEx模式在我的android应用程序上实现它

我的条件：-

\W*(off)\W*
(\d|\s|%)+off

some text you have 20% OFF. Avail @ this shop. - Match

some text some text office address is..... - Not To Match

some text you have 20%OFF. Avail @ this shop. - Match

some text you have 20%OFF! Avail @ this shop. - Match

some text you have 20%OFF; Avail @ this shop. - Match

some text some textofficeaddress is..... - Not To Match

1） 在第一个字母O之前，它将显示任何特殊字符或数字等。。但是在O之前没有字母表

2） 在最后一个字母F之后，它将显示任何特殊字符、数字、点或！等但是F之后没有字母表

尝试了正则表达式模式：-

\W*(off)\W*
(\d|\s|%)+off

some text you have 20% OFF. Avail @ this shop. - Match

some text some text office address is..... - Not To Match

some text you have 20%OFF. Avail @ this shop. - Match

some text you have 20%OFF! Avail @ this shop. - Match

some text you have 20%OFF; Avail @ this shop. - Match

some text some textofficeaddress is..... - Not To Match

Java编码

public static boolean offerMatcher(String message_body) {

    MessageMatcher = Pattern.compile(message, Pattern.CASE_INSENSITIVE).matcher(message_body);

    return MessageMatcher.find();
}

注意：-图案在For循环中

示例：-

\W*(off)\W*
(\d|\s|%)+off

some text you have 20% OFF. Avail @ this shop. - Match

some text some text office address is..... - Not To Match

some text you have 20%OFF. Avail @ this shop. - Match

some text you have 20%OFF! Avail @ this shop. - Match

some text you have 20%OFF; Avail @ this shop. - Match

some text some textofficeaddress is..... - Not To Match

---

我一直在尝试使用一个在线正则表达式生成器使其正确，但我无法使其精确匹配。

根据模糊的描述，这符合您的要求

在

关闭之前或之后没有字母

[^a-zA-Z]OFF[^a-zA-Z]


不过，我可能会建议打个数字+折

\d+% OFF[^a-zA-Z]

根据模糊的描述，这符合您的要求

在
关闭之前或之后没有字母

[^a-zA-Z]OFF[^a-zA-Z]


不过，我可能会建议打个数字+折

\d+% OFF[^a-zA-Z]

只需在场外使用
[^\\p{Alpha}]
，即不使用字母字符

String [] inputs = {
    "some text you have 20% OFF. Avail @ this shop.",
    "some text some text office address is.....",
    "some text you have 20%OFF. Avail @ this shop." ,
    "some text you have 20%OFF! Avail @ this shop." ,
    "some text you have 20%OFF; Avail @ this shop.",
    "some text some textofficeaddress is....."};

for (String each : inputs) {
    System.out.println((each + " => " + each.matches(".*[^\\p{Alpha}]OFF[^\\p{Alpha}].*")));
}

只需在场外使用
[^\\p{Alpha}]
，即不使用字母字符

String [] inputs = {
    "some text you have 20% OFF. Avail @ this shop.",
    "some text some text office address is.....",
    "some text you have 20%OFF. Avail @ this shop." ,
    "some text you have 20%OFF! Avail @ this shop." ,
    "some text you have 20%OFF; Avail @ this shop.",
    "some text some textofficeaddress is....."};

for (String each : inputs) {
    System.out.println((each + " => " + each.matches(".*[^\\p{Alpha}]OFF[^\\p{Alpha}].*")));
}

您只需在
\W
之后删除
*
，因为它允许在关闭前后0次出现非单词字符

问题是，如果它位于字符串的开头或结尾，它将无法找到。如果您还希望接受这些案例，请明确添加它们：

public class Match {
    public static void main(String[] args) {
        Pattern pattern = Pattern.compile("(\\W|^)(off)(\\W|$)", Pattern.CASE_INSENSITIVE);

        String[] strings = new String[] {
            "some text you have 20% OFF. Avail @ this shop.",
            "some text some text office address is",
            "some text you have 20%OFF. Avail @ this shop.",
            "some text you have 20%OFF! Avail @ this shop.",
            "some text you have 20%OFF; Avail @ this shop.",
            "some text some textofficeaddress is.....",
            "OFF is OK",
            "test with OFF"
        };

        for (String s : strings) {
            System.out.println(s + " : " + pattern.matcher(s).find());
        }
    }
}

您只需在
\W
之后删除
*
，因为它允许在关闭前后0次出现非单词字符

问题是，如果它位于字符串的开头或结尾，它将无法找到。如果您还希望接受这些案例，请明确添加它们：

public class Match {
    public static void main(String[] args) {
        Pattern pattern = Pattern.compile("(\\W|^)(off)(\\W|$)", Pattern.CASE_INSENSITIVE);

        String[] strings = new String[] {
            "some text you have 20% OFF. Avail @ this shop.",
            "some text some text office address is",
            "some text you have 20%OFF. Avail @ this shop.",
            "some text you have 20%OFF! Avail @ this shop.",
            "some text you have 20%OFF; Avail @ this shop.",
            "some text some textofficeaddress is.....",
            "OFF is OK",
            "test with OFF"
        };

        for (String s : strings) {
            System.out.println(s + " : " + pattern.matcher(s).find());
        }
    }
}

您忘了提到您尝试的正则表达式可以使用string.contains（“OFF”）@板球。请稍等，我会更新的。对不起，“O之前没有字母表”--这是什么意思？？每个例子都在O前面有字母。你的意思是紧接着之前吗？@Mohammadnabil Contains将是最后一个例子。你忘了提到你尝试的正则表达式可以使用string.Contains（“OFF”）@板球。请稍等，我会更新的。对不起，“O之前没有字母表”--这是什么意思？？每个例子都在O前面有字母。你是说紧接着之前吗？@Mohammadnabil Contains will举了最后一个例子。为什么不使用
i
标志？因为案例看起来很重要？@cricket\u 007谢谢。为什么不使用
i
标志？因为案例看起来很重要？@cricket\u 007谢谢。你呢
\u OFF
？不知道Java有这种语法。。。我知道
\p{Alpha}
那么
\u OFF
呢？我不知道Java有这样的语法。。。我知道
\p{Alpha}