在Zuul网关中，如何修改自定义过滤器中的服务路径？

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;

public class CustomFilter extends ZuulFilter {

    @Override
    public String filterType() {
        return "pre"; // 过滤器类型为前置过滤器
    }

    @Override
    public int filterOrder() {
        return 1; // 过滤器执行顺序，数字越小越先执行
    }

    @Override
    public boolean shouldFilter() {
        return true; // 是否执行该过滤器，true表示执行
    }

    @Override
    public Object run() {
        RequestContext ctx = RequestContext.getCurrentContext();
        String requestURI = ctx.getRequest().getRequestURI();

        // 修改服务路径
        String modifiedPath = "/new-service-path";
        ctx.put("requestURI", modifiedPath);

        return null;
    }
}

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class ZuulConfig {

    @Bean
    public CustomFilter customFilter() {
        return new CustomFilter();
    }
}