printWrite文字化け

response.setCharacterEncoding("utf-8");  
  response.setContentType("text/html; charset=utf-8"); 
  PrintWriter pw = response.getWriter(); 
 pw.println("<script type='text/javascript'>");
 pw.println("alert('     !');");
 httpSession.invalidate();
 pw.println("window.parent.location.href='"+onErrorUrl+"';");
 pw.println("</script>");