Servlet输出弹框消息并跳转

			String msg;
			if(user.getStudentNo()==0) {
   
				if(s.insertUser(user)) {
   
					msg="添加成功！";
				}else {
   
					msg="添加失败";
				}
			}else {
   
				if(s.updateUser(user)) {
   
					msg="修改成功！";
				}else {
   
					msg="修改失败";
				}
				
			}
			//getstudentservlet是servlet可以是页面如:index.jsp
			resp.getWriter().print("<script language='javascript'>alert('"+msg+"');window.location.href='getstudentservlet'</script>");