public class AccessControlFilter implements Filter {

    @Override

    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override

    public void doFilter(ServletRequest req, ServletResponse res,

            FilterChain chain) throws IOException, ServletException {

        HttpServletResponse response = (HttpServletResponse) res;

        response.setHeader("Access-Control-Allow-Origin", "*");

        response.setHeader("Access-Control-Allow-Methods",

                "POST, GET, OPTIONS, DELETE");

        response.setHeader("Access-Control-Max-Age", "3600");

        response.setHeader("Access-Control-Allow-Headers", "x-requested-with,content-type");

        chain.doFilter(req, res);

    }

    @Override

    public void destroy() {

    }

}