Java简单CROSFilter支持跨域

@WebFilter(filterName="CROSFilter", urlPatterns = {"/*"})
public class CROSFilter implements Filter {

    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
            throws IOException, ServletException {
        HttpServletResponse httpResponse = (HttpServletResponse)res;
        httpResponse.setHeader("Access-Control-Allow-Origin", "*");
        httpResponse.setHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE");
        httpResponse.setHeader("Access-Control-Max-Age", "1800");
        httpResponse.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
        httpResponse.setHeader("Access-Control-Allow-Credentials", "true");
        chain.doFilter(req, httpResponse);  
    }
}