初回アクセス時にリンクにjsessionidが入るのをなんとかする ref: http://qiita.com/thrakt/items/f6f31fb13e832e9d710d

CutJsessionidFilter.java

package ex.web.interceptor;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;

public class CutJsessionidFilter implements Filter {

    private static class CutJsessionidResponseWrapper extends
            HttpServletResponseWrapper {

        public CutJsessionidResponseWrapper(final HttpServletResponse response) {
            super(response);
        }

        @Override
        public String encodeURL(final String url) {
            String encurl = super.encodeURL(url).replaceAll(
                    ";jsessionid=[0-9a-zA-Z]+", "");
            return encurl;
        }
    }

    @Override
    public void init(final FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(final ServletRequest request,
            final ServletResponse response, final FilterChain chain)
            throws IOException, ServletException {
        if (response instanceof HttpServletResponse
                && !(response instanceof CutJsessionidResponseWrapper)) {
            chain.doFilter(request, new CutJsessionidResponseWrapper(
                    (HttpServletResponse) response));
            return;
        }
        chain.doFilter(request, response);
    }

    @Override
    public void destroy() {
    }
}

web.xml

<filter>
  <filter-name>cutJsessionidFilter</filter-name>
  <filter-class>ex.web.interceptor.CutJsessionidFilter</filter-class>
</filter>

<filter-mapping>
  <filter-name>cutJsessionidFilter</filter-name>
  <url-pattern>/*</url-pattern>
  <dispatcher>REQUEST</dispatcher>
  <dispatcher>INCLUDE</dispatcher>
</filter-mapping>