[英]Use Java variable in HTML File
I made a LoginServlet with Java, that gets username and password from a database. 我用Java制作了LoginServlet,它从数据库获取用户名和密码。 Now I want to display the username on my website after logging in. 现在,我想在登录后在我的网站上显示用户名。
Servlet Code: public class LoginServlet extends HttpServlet { Servlet代码:公共类LoginServlet扩展了HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
String username = req.getParameter("username");
String password = req.getParameter("password");
Sql2o sql2o = DatabaseConnetcionProvider.getSql2oConnection();
User user = UserDAO.findBenutzerByUsername(username, sql2o);
if(user != null && user.getPassword().equals(password)){
UserListe.getInstance().add(user);
HttpSession session = req.getSession();
session.setAttribute("user", user);
resp.sendRedirect("/public/Home.html");
} else {
resp.sendRedirect("/public/Error.html");
}
}
} }
Now I want to display the username on my Website. 现在,我想在我的网站上显示用户名。
I hope you can help me :) 我希望你能帮帮我 :)
如果是JSP,则可以使用会话隐式对象
<%= ((User) session.getAttribute("user")).getUsername %>
You can retrieve value in your Home.html as below 您可以在Home.html中检索值,如下所示
<script type="text/javascript">
$(document).ready(function() {
userName = "{{user}}";
$("#yourFieldName").val(userName);
});
</script>
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