HttpServletResponse

response.setContentType("text/xml;charset=UTF-8");
response.setHeader("Pragma", "No-cache");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader("Expires", 0);

response.getWriter().write(text);
response.getWriter().flush();
response.getWriter().close();

HttpServletResponse

原文：https://www.cnblogs.com/zhoucx66/p/9087362.html