java 过滤非数字字符

public class Test {    public static void main(String []args){    /*String regEx="[`~!@#$%^&*()+=|{}':;',\\[\\].<>/?~！@#￥%……&*（）——+|{}【】‘；：”“’。，、？]";     Pattern p = Pattern.compile(regEx);     Matcher m = p.matcher(str);      m.replaceAll("").trim();*/        String character = "sf9897&^%fdfesa撒rf";    //alph = alph.replaceAll("[^(A-Za-z)]", "");    character = character.replaceAll("[^(a-zA-Z0-9\\u4e00-\\u9fa5)]", "");    System.out.println("abasdfasdf1 2wasdfasdf9_8asdfasdfz asdfasdfyx7".replaceAll("\\D", ""));     System.out.print(character);    }}

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