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"); 
        chain.doFilter(req, res); 
	}