精通正则表达式383页例子展开

import java.util.regex.Matcher;import java.util.regex.Pattern;public class ReplaceString {public static void main(String[] args) {StringBuilder text = new StringBuilder("It's SO very RUDE to shout !");Matcher m = Pattern.compile("\\b[\\p{Lu}\\p{Lt}]+\\b").matcher(text);while (m.find()) {text.replace(m.start(), m.end(), m.group().toLowerCase());System.out.println(">>>>>> "+m.group(0));}//注意这二者（find,matches)之间的区别，jdk源码中很清楚if(m.matches()){System.out.println(">>>>>> "+m.group(0));}System.out.println(text);}}