loginaction.java

21天学通java的示例程序源代码

package ezmail;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import javax.mail.Session;
import javax.mail.Store;
import javax.mail.Folder;

public class LoginAction implements Action {

	public LoginAction() {
	}

	/**
	 *  Performs the following steps during login
	 *  <ol>
	 *		<li>Reads form data for: pop3server, user, and password</li>
	 *		<li>Configure mail session</li>
	 *		<li>Constructs a UserInfo object and place in the HttpSession</li>
	 *		<li>Set the LOGGED_IN flag to true</li>
	 * </ol>
	 *
	 *  The data is then placed in the user's session.  The attribute is named
	 *  <code>Constants.DATA</code>
	 */
	public void perform(ServletContext servletContext,
						HttpServletRequest request,
						HttpServletResponse response) throws ActionException {

		try {
			HttpSession theHttpSession = request.getSession();

			// retrieve data from login form and servlet context
			String pop3host = request.getParameter("pop3host");
			String user = request.getParameter("user");
			String password = request.getParameter("password");
			String emailAddress = request.getParameter("email_address");
			String smtphost = servletContext.getInitParameter("smtphost");

			// Configure the mail session
			System.out.println("Configuring mail session");
			java.util.Properties props = new java.util.Properties();
			props.put("mail.smtp.host", smtphost);
			props.put("mail.pop3.host", pop3host);
			Session mailSession = Session.getInstance(props, null);
			System.out.println("Configuring mail session....complete!");

			// create a UserInfo object
			UserInfo info = new UserInfo(pop3host, user, password, emailAddress);

			// now let's add user data to the session
			theHttpSession.setAttribute(Constants.MAIL_SESSION, mailSession);
			theHttpSession.setAttribute(Constants.USER_INFO, info);
			theHttpSession.setAttribute(Constants.LOGIN_STATUS, new Boolean(true));
		}
		catch (Exception exc) {
			exc.printStackTrace();
			throw new ActionException(exc.getMessage());
		}
	}
}