java字符乱码怎么办

name = URLEncoder.encode(name, "ISO-8859-1");
 name = URLDecoder.decode(name, "UTF-8");

name=new String(name.getBytes(),"UTF-8");

//利用getBytes将unicode字符串转成UTF-8格式的字节数组
 String name=request.getParameter("name");
  byte[] utf8Bytes = name.getBytes("utf-8");
//然后用utf-8 对这个字节数组解码成新的字符串
  name = new String(utf8Bytes, "utf-8");

request.setCharacterEncoding("utf-8");

<%
    //1.获得要查询的手环编号
       request.setCharacterEncoding("utf-8");
       String name=request.getParameter("name");