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java 正则表达式如何输出全部符合match 结果?

String regEx = "<a>([sS]*?)</a>";
String s = "<a>123</a><a>456</a><a>789</a>";
Pattern pat = Pattern.compile(regEx);
Matcher mat = pat.matcher(s);
boolean rs = mat.find();
for(int i=1;i<=mat.groupCount();i++){
   System.out.println(mat.group(i));
}

这个结果打印的是"123",但是456 ,789 没有打印,求问如何把符合的结果都打印出来呢?


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1 Answer

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by (71.8m points)

find每次只匹配一处,要想都匹配,需要循环:

import java.util.regex.*;
//...

String regEx = "<a>([\s\S]*?[^<])</a>";
String s = "<a>123</a><a>456</a><a>789</a>";
Pattern pat = Pattern.compile(regEx);
Matcher mat = pat.matcher(s);
while( mat.find()){
    for(int i=1;i<=mat.groupCount();i++){
       System.out.println(mat.group(i));
    }
}

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
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