在Java中打印正则表达式匹配项 [英] Print regex matches in java

问题描述

所以我有一个IP地址作为字符串. 我有这个正则表达式(\d{1-3})\.(\d{1-3})\.(\d{1-3})\.(\d{1-3}) 如何打印匹配的组?

So I have an IP address as a string. I have this regex (\d{1-3})\.(\d{1-3})\.(\d{1-3})\.(\d{1-3}) How do I print the matching groups?

谢谢！

推荐答案

import java.util.regex.*;
try {
    Pattern regex = Pattern.compile("(\\d\\{1-3\\})\\.(\\d\\{1-3\\})\\.(\\d\\{1-3\\})\\.(\\d\\{1-3\\})");
    Matcher regexMatcher = regex.matcher(subjectString);
    while (regexMatcher.find()) {
        for (int i = 1; i <= regexMatcher.groupCount(); i++) {
            // matched text: regexMatcher.group(i)
            // match start: regexMatcher.start(i)
            // match end: regexMatcher.end(i)
        }
    } 
} catch (PatternSyntaxException ex) {
    // Syntax error in the regular expression
}

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