Java经典实例：正则表达式，替换匹配的文本详解编程语言

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 BBB 

ReplaceAll:Do me a favour? Fetch my favorites.AAA favour BBB 

Do me a favour? Fetch my favorites.AAA favour 

Do me a favour? Fetch my favorites.AAA favour BBB

 

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