Java 判断汉字 正则

String country = "";
	if (null != request.getParameter("areaName")) {
		country = request.getParameter("areaName");
		try {
			// 如果是乱码就转码
			if (!(Pattern.matches("[\u4E00-\u9FA5]", country))) {			country = new String(country.getBytes("ISO-8859-1"),"UTF-8");
				}
							} catch (UnsupportedEncodingException e) {
				e.printStackTrace();
			}
		}