java 正则扫描EL 表达式

public static void main(String[] args) {Map map = new HashMap(2);map.put("name", "Jame Gosling");map.put("alias", "Rod Johnson");String line = "${name} did a great job, so ${alias} did.";String regex = "\\$\\{[^\\}]+\\}";Pattern p = Pattern.compile(regex);Matcher m = p.matcher(line);String g;while (m.find()) {g = m.group();g = g.substring(2, g.length() - 1);line = m.replaceFirst(map.get(g) + "");m = p.matcher(line);}System.out.println(line);}