/**
 * Copyright (c) 2006-2009, Redv.com
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Redv.com nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
/**
 * Created on 2006-10-7 14:05:12
 */
package cn.net.openid.jos.web;

import java.io.IOException;

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * The servlet of member page.
 * 
 * @author Sutra Zhou
 */
public class MemberServlet extends HttpServlet {
	/**
	 * 
	 */
	private static final long serialVersionUID = -6670900579691443871L;

	/**
	 * The logger.
	 */
	@SuppressWarnings("unused")
	private static final Log LOG = LogFactory.getLog(MemberServlet.class);

	/**
	 * The HTTP Servlet context.
	 */
	private transient ServletContext context;

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void init(final ServletConfig config) throws ServletException {
		super.init(config);
		this.context = config.getServletContext();
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected void doGet(final HttpServletRequest req,
			final HttpServletResponse resp) throws ServletException,
			IOException {
		String pathInfo = req.getPathInfo();
		if (pathInfo != null && pathInfo.length() > 1) {
			req.setAttribute("username", req.getPathInfo().substring(1));
			this.context.getRequestDispatcher("/member.jsp").forward(req, resp);
		} else {
			resp.sendError(HttpServletResponse.SC_BAD_REQUEST);
		}
	}
}

/**
 * Copyright (c) 2006-2009, Redv.com
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Redv.com nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
/**
 * Created on 2006-10-7 14:05:12
 */
package cn.net.openid.jos.web;

import java.io.IOException;

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * The servlet of member page.
 * 
 * @author Sutra Zhou
 */
public class MemberServlet extends HttpServlet {
	/**
	 * 
	 */
	private static final long serialVersionUID = -6670900579691443871L;

	/**
	 * The logger.
	 */
	private static final Log LOG = LogFactory.getLog(MemberServlet.class);

	/**
	 * The HTTP Servlet context.
	 */
	private transient ServletContext context;

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void init(final ServletConfig config) throws ServletException {
		super.init(config);
		this.context = config.getServletContext();
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected void doGet(final HttpServletRequest req,
			final HttpServletResponse resp) throws ServletException,
			IOException {
		String pathInfo = req.getPathInfo();
		LOG.debug("pathInfo: " + pathInfo);
		if (pathInfo != null && pathInfo.length() > 1) {
			String username = pathInfo.substring(1);
			LOG.debug("username: " + username);
			req.setAttribute("username", username);
			this.context.getRequestDispatcher("/member.jsp").forward(req, resp);
		} else {
			LOG.debug("pathInfo is empty.");
			resp.sendError(HttpServletResponse.SC_BAD_REQUEST);
		}
	}
}

Add some debug log to MemberServlet.