正则表达式用HTML标签替换字符 [英] Regex Replacing Characters with HTML Tags

问题描述

我有这个示例字符串，我想在其中使用JavaScript中的正则表达式用一个打开和关闭强标签替换星号:

I have this sample string where I would like to replace the star with an opening and closing strong tag using regular expressions in JavaScript:

To increase search results, use the 8** prefix.
877 and 866 will result in more matches than 800 and 888 prefixes.
*Note*: The pattern for a custom number can be more than 7 digits. For example: 1-800-Mat-tres(s)

理想的输出为:

To increase search results, use the 8** prefix.
877 and 866 will result in more matches than 800 and 888 prefixes.
<strong>Note</strong>: The pattern for a custom number can be more than 7 digits. For example: 1-800-Mat-tres(s)

唯一的警告是，如果连续有两个开始(例如8 **)，则不要将其替换为强标签.

The only caveat being that if there are two starts in a row (like 8**), that they not be replaced with the strong tags.

在此先感谢您的帮助.

推荐答案

也许您可以尝试这样的事情?

Maybe you could try something like this?

\*(\S[^\*]+\S)\*

+ 表示1或更大，因此仅在 * 之间存在某些内容时才匹配.

The + means 1 or more, so will only match if there is something between the *.

[^ \ *] 表示不是星星的任何内容 * .

The [^\*] means anything that's not a star *.

更新我已经更新了上面的正则表达式，以指定它与 * 和每个匹配项的第一个和最后一个字符之间的非空白字符不匹配.这样可以防止以下突出显示的位不正确匹配:

UPDATE I've updated the regex above to specify that it doesn't match nonwhite space character's in between the * and and the first and last characters of each match. This prevent's the highlighted bit below from incorrectly matching:

8 * *前缀.877和866将导致比800和888前缀更多的匹配项.* 注意*

这里是带注释的正则表达式(在javascript中)

Here is the same regex with comments (in javascript)

"\\*" +       // Match the character "*" literally
"\\S" +       // Match a single character that is a "non-whitespace character"
"[^\\*]" +    // Match any character that is NOT a * character
   "+" +        // Between one and unlimited times, as many times as possible, giving back as needed (greedy)
"\\S" +       // Match a single character that is a "non-whitespace character"
"\\*"         // Match the character "*" literally

最后，这是您可以使用的javascript的示例:

Finally, here is an example of the javascript you could use:

yourStringData.replace(/\*(\S[^\*]+\S)\*/g, "<strong>$1</strong>");

只需用包含要对其执行替换操作的数据的变量替换 yourStringData .

Just replace the yourStringData with a variable containing the data you want to run the replace against.

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