用於跨源請求的 Java Jersey CORS 過濾器

@Provider
public class CORSResponseFilter implements ContainerResponseFilter {

    public void filter(
        ContainerRequestContext requestContext,
        ContainerResponseContext responseContext
    ) throws IOException {
        MultivaluedMap<String, Object> headers = responseContext.getHeaders();
        headers.add("Access-Control-Allow-Origin", "*"); //Allow Access from everywhere   
        headers.add("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT");            
        headers.add("Access-Control-Allow-Headers", "X-Requested-With, Content-Type");
    }
}

請注意，Access-Control-Allow-Origin 僅在 OPTIONS 響應時有用。