JAVA：自定义工具类

一、从字符串中提取数字  

public static String getNumFromString(String string) {

	StringBuilder sb = new StringBuilder();
	String regex = "\\d*";
	Pattern p = Pattern.compile(regex);
	Matcher m = p.matcher(string);
	while (m.find()) {
		if (!"".equals(m.group())) {
			sb = sb.append(m.group());
		}
	}
	return sb.toString();
}