Question

我有一个字符串，格式如下：

I am extracting this Hello:A;B;C, also Hello:D;E;F

如何提取字符串A;B;C和D;E;F？

我在下面写了一段代码片段来提取但不能提取最后一个匹配的字符D;E;F

Pattern pattern = Pattern.compile("(?<=Hello:).*?(?=,)");

Answer 1

$表示行尾。

因此这应该有效：

Pattern pattern = Pattern.compile("(?<=Hello:).*?(?=,|$)");

所以你要先看一下逗号或行尾。

Test

Answer 2

试试这个：

String test = "I am extracting this Hello:Word;AnotherWord;YetAnotherWord, also Hello:D;E;F";
// any word optionally followed by ";" three times, the whole thing followed by either two non-word characters or EOL
Pattern pattern = Pattern.compile("(\\w+;?){3}(?=\\W{2,}|$)");
Matcher matcher = pattern.matcher(test);
while (matcher.find()) {
    System.out.println(matcher.group());
}

输出：

Word;AnotherWord;YetAnotherWord
D;E;F

Answer 3

假设你的意思是省略字符串中的某些模式：

    String s = "I am extracting this Hello:A;B;C, also Hello:D;E;F" ;
    ArrayList<String> tokens = new ArrayList<String>();

    tokens.add( "A;B;C" );
    tokens.add( "D;E;F" );

    for( String tok : tokens )
    {
        if( s.contains( tok ) )
        {
            s = s.replace( tok, "");
        }
    }
    System.out.println( s );

字符和行尾的模式匹配

3 个答案: