【java】struts和ajax的小例子①→后台的登录验证

来源：互联网发布：java重载的作用编辑：程序博客网时间：2024/05/17 21:06

try {
   request.setCharacterEncoding("UTF-8");
  } catch (UnsupportedEncodingException e) {
   e.printStackTrace();
  }
try {
   String msgStr = "**** SORRY, USER_ID OR PASSWORD ERROR,PLEASE CHECK IT ****";
   response.setContentType("text/xml;charset=UTF-8");

response.setHeader("Cache-Control", "no-cache");

//数据取得省略

   if (记录数 == 0) {
    response.getWriter().println("<?xml version='1.0' encoding='UTF-8' ?>");
    response.getWriter().println("<root>");
    response.getWriter().println("<COUNT>");
    response.getWriter().print(msgStr);
    response.getWriter().println("</COUNT>");
    response.getWriter().println("</root>");
    response.getWriter().close();
   } else {
    response.getWriter().println("<?xml version='1.0' encoding='UTF-8' ?>");
    response.getWriter().println("<root>");
    response.getWriter().println("<COUNT>");
    response.getWriter().print(RS_COUNT);
    response.getWriter().println("</COUNT>");
    response.getWriter().println("<DISPLAYID>");
    response.getWriter().print(DISPLAY_USER_ID);
    response.getWriter().println("</DISPLAYID>");
    response.getWriter().println("<DISPLAYNAME>");
    response.getWriter().print(DISPLAY_USER_NAME);
    response.getWriter().println("</DISPLAYNAME>");
    response.getWriter().println("</root>");
    response.getWriter().close();
   }
} catch (Exception ex) {}