有没有办法在netflix zuul路由过滤器中更改http请求方法？

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;
import org.springframework.cloud.netflix.zuul.filters.support.FilterConstants;
import org.springframework.stereotype.Component;

@Component
public class HttpMethodChangeFilter extends ZuulFilter {

    @Override
    public String filterType() {
        return FilterConstants.ROUTE_TYPE;
    }

    @Override
    public int filterOrder() {
        return FilterConstants.SEND_FORWARD_FILTER_ORDER - 1;
    }

    @Override
    public boolean shouldFilter() {
        return true;
    }

    @Override
    public Object run() {
        RequestContext ctx = RequestContext.getCurrentContext();
        ctx.setRequestMethod("POST"); // 更改请求方法为POST
        return null;
    }
}