最简单的登陆界面jsp+servlet

login.jsp

<form action="login" method="get">

userName<input type="text" name="userName"><br>password<input type="text" name="password"><br><input type="submit" value="login">

</form>

loginServlet.java

doget(.........){string userName=req.getParameter("userName");string password=req.getParameter("password");if(userName!=null && password!=null){ resp.getwriter.print("ok");}}
web.xml配置servlet路径地址请求：http://localhost:8080/myweb/login.jsp