代码实现native2assci

public static void main(String[] args) {
        String unicode = "";
        String s="用户名";
        char[] charAry = new char[s.length()];
        for(int i=0; i<charAry.length; i++) {
          charAry[i] = (char)s.charAt(i);
           unicode+="\\u" + Integer.toString(charAry[i], 16);
        }
        System.out.println(unicode);
    }