Name:

Password:

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.*;

public class MyFilter implements Filter{

public void init(FilterConfig arg0) throws ServletException {}
    
public void doFilter(ServletRequest req, ServletResponse resp,
        FilterChain chain) throws IOException, ServletException {
        
    PrintWriter out=resp.getWriter();
        
    String password=req.getParameter("password");
    if(password.equals("admin")){
    chain.doFilter(req, resp);//sends request to next resource
    }
    else{
    out.print("username or password error!");
    RequestDispatcher rd=req.getRequestDispatcher("index.html");
    rd.include(req, resp);
    }
        
}
    public void destroy() {}

}

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.*;

public class AdminServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        
        out.print("welcome ADMIN");
        out.close();
    }
}

 
    AdminServlet
    AdminServlet
  

  
    AdminServlet
    /servlet1
  
  
 
  f1
  MyFilter
  
  
  f1
  /servlet1