我不知道Java内置有什么类似的东西。您可以使用Matcher类轻松滚动自己的游戏：
import java.util.regex.*;
public class CallbackMatcher
{
public static interface Callback
{
public String foundMatch(MatchResult matchResult);
}
private final Pattern pattern;
public CallbackMatcher(String regex)
{
this.pattern = Pattern.compile(regex);
}
public String replaceMatches(String string, Callback callback)
{
final Matcher matcher = this.pattern.matcher(string);
while(matcher.find())
{
final MatchResult matchResult = matcher.toMatchResult();
final String replacement = callback.foundMatch(matchResult);
string = string.substring(0, matchResult.start()) +
replacement + string.substring(matchResult.end());
matcher.reset(string);
}
}
}
然后致电：
final CallbackMatcher.Callback callback = new CallbackMatcher.Callback() {
public String foundMatch(MatchResult matchResult)
{
return "<img src=\"thumbs/" + matchResults.group(1) + "\"/>";
}
};
final CallbackMatcher callbackMatcher = new CallbackMatcher("/\[thumb(\d+)\]/");
callbackMatcher.replaceMatches(articleText, callback);
请注意，您可以通过调用matchResults.group()或来获取整个匹配的字符串matchResults.group(0)，因此不必将当前字符串状态传递给回调。
这是原始照片，因为询问者喜欢它：
public class CallbackMatcher
{
public static interface Callback
{
public void foundMatch(MatchResult matchResult);
}
private final Pattern pattern;
public CallbackMatcher(String regex)
{
this.pattern = Pattern.compile(regex);
}
public String findMatches(String string, Callback callback)
{
final Matcher matcher = this.pattern.matcher(string);
while(matcher.find())
{
callback.foundMatch(matcher.toMatchResult());
}
}
}
对于这种特殊的用例，最好只在回调中将每个匹配项排队，然后再向后遍历它们。这将避免在修改字符串时必须重新映射索引。
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