<html>
<head>
</head>
<body>
<form name="loginform" method="post" action="WelcomeServlet">
<br><br>
<table align="center"><tr><td><h2>Login Authentication</h2></td></tr></table>
<table width="300px" align="center" style="border:1px solid #000000;background-color:#efefef;">
<tr><td colspan=2></td></tr>
<tr><td colspan=2> </td></tr>
<tr>
<td><b>Login Name</b></td>
<td><input type="text" name="username" ></td>
</tr>
<tr>
<td><b>Password</b></td>
<td><input type="password" name="password"></td>
</tr>
<tr>
<td></td>
<td><input type="submit" name="Submit" value="Submit"></td>
</tr>
<tr><td colspan=2> </td></tr>
</table>
</form>
</body>
</html>
那么这个servlet
import java.io.*;
import java.util.*;
//import java.io.PrintWriter;
import javax.servlet.*;
//import javax.servlet.ServletConfig;
//import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class WelcomeServlet extends HttpServlet {
/*
@Override
public void init(ServletConfig config) …