c# - 将 C# 正则表达式代码转换为 Java

Question

我在 C# 中找到了这个正则表达式提取器代码。谁能告诉我这是如何工作的，以及如何用 Java 编写等效的程序？

// extract songtitle from metadata header. 
// Trim was needed, because some stations don't trim the songtitle
fileName = 
    Regex.Match(metadataHeader, 
      "(StreamTitle=')(.*)(';StreamUrl)").Groups[2].Value.Trim();

Answer 1

这应该是你想要的。

// Create the Regex pattern
Pattern p = Pattern.compile("(StreamTitle=')(.*)(';StreamUrl)");
// Create a matcher that matches the pattern against your input
Matcher m = p.matcher(metadataHeader);
// if we found a match
if (m.find()) {
    // the filename is the second group. (The `(.*)` part)
    filename = m.group(2);
}