public static void main(String[] args) { //生成Pattern对象并且编译一个简单的正则表达式"Kelvin" Pattern p = Pattern.compile("Kelvin"); //用Pattern类的matcher()方法生成一个Matcher对象 Matcher m = p.matcher("Kelvin Li and Kelvin Chan are both working in Kelvin Chen's KelvinSoftShop company"); StringBuffer sb = new StringBuffer(); int i=0; //使用find()方法查找第一个匹配的对象 boolean result = m.find(); //使用循环将句子里所有的kelvin找出并替换再将内容加到sb里 while(result) { i++; m.appendReplacement(sb, "Kevin"); System.out.println("第"+i+"次匹配后sb的内容是:"+sb); //继续查找下一个匹配对象 result = m.find(); } //最后调用appendTail()方法将最后一次匹配后的剩余字符串加到sb里; m.appendTail(sb); System.out.println("调用m.appendTail(sb)后sb的最终内容是:"+ sb.toString()); }
最后打印结果:
第1次匹配后sb的内容是:Kevin 第2次匹配后sb的内容是:Kevin Li and Kevin 第3次匹配后sb的内容是:Kevin Li and Kevin Chan are both working in Kevin 第4次匹配后sb的内容是:Kevin Li and Kevin Chan are both working in Kevin Chen's Kevin 调用m.appendTail(sb)后sb的最终内容是:Kevin Li and Kevin Chan are both working in Kevin Chen's KevinSoftShop company