解决下载中文名字乱码问题

  public static String toUtf8String(String s) {
         StringBuffer sb = new StringBuffer();
         for (int i=0;i             char c = s.charAt(i);
             if (c >= 0 && c <= 255) {
                 sb.append(c);
             } else {
                 byte[] b;
                 try {
                     b = Character.toString(c).getBytes("utf-8");
                 } catch (Exception ex) {
                     System.out.println(ex);
                     b = new byte[0];
                 }
                 for (int j = 0; j < b.length; j++) {
                     int k = b[j];
                     if (k < 0) k += 256;
                     sb.append("%" + Integer.toHexString(k).toUpperCase());
                 }
             }
         }
         return sb.toString();
     }