import java.util.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.security.*;
public class MyServlet extends HttpServlet {
public void init(ServletConfig cfg) throws ServletException
{
super.init(cfg);
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException
{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<HTML>");
out.println("<HEAD>");
out.println("<TITLE>");
out.println("User Authentication");
out.println("</TITLE>");
out.println("</HEAD>");
out.println("<BODY>");
out.println("<H1>User Authentication</H1>");
String type = request.getAuthType();
out.println("Welcome to this secure page.<BR>");
out.println("Authentication mechanism: " + type + "<BR>");
Principal principal = request.getUserPrincipal();
out.println("Your username is: " + principal.getName() + "<BR>");
out.println("</BODY>");
out.println("</HTML>");
}
}
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
"http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
<web-app>
<servlet><servlet-name>MyServletName</servlet-name>
<servlet-class>MyServlet</servlet-class>
</servlet>
<servlet-mapping><servlet-name>MyServletName</servlet-name>
<url-pattern>/index.html</url-pattern>
</servlet-mapping>
</web-app>
Download: ServletRequestAuthType.zip( 88 k)