setting up form based java servlet security

hi i have implemented a set of servlet pages....

i have implemented a loginpage.html which redirects to the servlet which processes the login
via checking the usr name and password against a database...

all works fine...

however on further reading i have discovered predefined security measures

i have come up with the following for the web.xml

[code]

<security-constraint>
            <web-resource-collection>
                  <web-resource-name>Test</web-resource-name>
                  <url-pattern>/LoginForm.html</url-pattern>
                  <http-method>GET</http-method>
                  <http-method>POST</http-method>
            </web-resource-collection>
            <auth-constraint>
                  <role-name>manager</role-name></auth-constraint>
            <user-data-constraint>
                  <transport-guarantee>NONE</transport-guarantee></user-data-constraint></security-constraint><login-config>
            <auth-method>FORM</auth-method>
            <form-login-config>
                  <form-login-page>/LoginForm.html</form-login-page>
                  <form-error-page>/LoginErr.html</form-error-page>
            </form-login-config></login-config>

      <servlet>
            <description>
            </description>
            <display-name>loginCheck</display-name>
            <servlet-name>loginCheck</servlet-name>
            <servlet-class>loginCheck</servlet-class>
      </servlet>

      <servlet>
      <description>
      </description>
      <display-name>login</display-name>
      <servlet-name>login</servlet-name>
      <servlet-class>login</servlet-class>
      </servlet>
      
      <servlet-mapping>
            <servlet-name>ApageMaker</servlet-name>
            <url-pattern>/ApageMaker</url-pattern>
      </servlet-mapping>
<servlet-mapping>
      <servlet-name>login</servlet-name>
      <url-pattern>/login</url-pattern>
</servlet-mapping><welcome-file-list>
            <welcome-file>index.html</welcome-file>
            <welcome-file>index.htm</welcome-file>
            <welcome-file>index.jsp</welcome-file>
            <welcome-file>default.html</welcome-file>
            <welcome-file>default.htm</welcome-file>
            <welcome-file>default.jsp</welcome-file>
            <welcome-file>LoginForm.html</welcome-file>
      </welcome-file-list>
      
</web-app>


[/code]

now the part i dont' get is that my login,html now has the following

[code]

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

                  
                  
            <h1 align="center"></br> Coffee RTIS Login </h1>
                  
                  <center>
                        <table border ="0">
                              <tr>
                                    <td ><h3>user name</br></h3></td>
                                    <td>
                                          <input type="text" name = "j_username">

                                    </td>
                              </tr>
                              
                              <tr>
                                    <td><h3>password</h3></td>
                                    <td>
                                          <input type="password" name = "j_password">
                                    
                                    </td>
                              
                              </tr>

                        
                        
                        
                        </table>
                  
                  <input type ="submit" value = "Login!">

[/code]

in the old version the action redirceted to s servlet ie

[code]

   <form  action="www.servlet.com\servlet\login" ...

[/code]

which redirects to the login processing servlet....

in the new version, where or how do you store a list of logins ....

or how do you redirect to a login processing servlet...

thanks