Java+Tomcat+MySQL实现简单的网页注册和登录

<%
// HTTP头信息Expires告诉代理服务器它的缓存页面何时将过期
// no-cache:强制缓存从服务器上获取新的页面
// no-store: 在任何环境下缓存不保存任何页面
response.setHeader("Cache-Control","no-store");
response.setHeader("Pragma","no-cache");
response.setDateHeader("Expires",0);
%>

<%--we use a form to submit the data inputted by users--%>
<%--action=The address to which submitted form data should be sent to--%>
<%--method=The HTTP method by which submitted form data should be sent--%>
<%--name=The name of the form--%>

用户登录

用户名：	<%--here this data cell will take up two columns--%> <%--here we name the inputted data as username and send it to LoginTestServlet--%> <%--the onfocus attribute is used to clear the default values when the data cell is focused on--%>
密 码
<%--submit the form--%>	<%--reset the inputted data--%>	<%--call the goRegister() function on click--%>