Java基于正则表达式实现的替换匹配文本功能【经典实例】

package replaceDemo;import java.util.regex.Matcher;import java.util.regex.Pattern;/** * Created by Frank * 替换匹配的文本 */public class ReplaceDemo { public static void main(String[] args) {  // 创建一个正则表达式模式，用以匹配一个单词（/b=单词边界）  String patt = "//bfavor//b";  // 用于测试的输入字符串  String input = "Do me a favor? Fetch my favorites.AAA favor BBB";  System.out.println("Input:" + input);  // 从正则表达式实例中运行方法并查看其如何运行  Pattern r = Pattern.compile(patt);  Matcher m = r.matcher(input);  System.out.println("ReplaceAll:" + m.replaceAll("favour"));  // appendReplacement方法  m.reset();  StringBuffer sb = new StringBuffer();  while (m.find()) {   // 将匹配之前的字符串复制到sb,再将匹配结果替换为："favour"，并追加到sb   m.appendReplacement(sb, "favour");  }  System.out.println(sb.toString());  m.appendTail(sb);  System.out.println(sb.toString());/*输出：Input:Do me a favor? Fetch my favorites.AAA favor BBBReplaceAll:Do me a favour? Fetch my favorites.AAA favour BBBDo me a favour? Fetch my favorites.AAA favourDo me a favour? Fetch my favorites.AAA favour BBB*/ }}