Pattern - Matcher

public class PatternTest {public static void main(String[] args) {String source = "名字${name},性别${sex},年龄${age}。";String regex = "\\$\\{\\w+}";Pattern pa = Pattern.compile(regex);Matcher mat = pa.matcher(source);StringBuffer sb = new StringBuffer();while(mat.find()){int i = mat.end();//返回由以前匹配操作所匹配串尾到父串头的长度System.out.println(i);System.out.println(mat.group());mat.appendReplacement(sb, getItsValue(mat.group()));}mat.appendTail(sb);//添加尾巴System.out.println(sb.toString());}private static String getItsValue(String key){if("${name}".equals(key)){return "zhangjing";}else if("${sex}".equals(key)){return "男";}else if("${age}".equals(key)){return "23";}return null;}}