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=; i<charAry.length; i++) {
           charAry[i] = (char)s.charAt(i);
            unicode+="\\u" + Integer.toString(charAry[i], );
         }
         System.out.println(unicode);
     }