1. non-simplify mode:
```
dubbo://120.0.0.1:20880/org.apache.dubbo.demo.DemoService?key=value
```
the store path of ZK will be: `/dubbo/porg.apache.dubbo.demo.DemoService/url`

2. simplify mode:
```
dubbo://120.0.0.1:20880/org.apache.dubbo.demo.DemoService?key=value
```
the store path of ZK will be: `/dubbo/porg.apache.dubbo.demo.DemoService/url`

3. simplify mode with path specified:
```
dubbo://120.0.0.1:20880/path-value?key=value
```
the store path of ZK will be: `/dubbo/path-value/url`
return urls;
    }
    public URL getUrlParameter(String key) {
        URL u = getUrls().get(key);
        if (u != null) {
            return u;
        }
        String value = getParameterAndDecoded(key);
        if (StringUtils.isEmpty(value)) {
            return null;
        }
        u = URL.valueOf(value);
        getUrls().put(key, u);
        return u;
    }
    public double getParameter(String key, double defaultValue) {
        Number n = getNumbers().get(key);
        if (n != null) {
            return n.doubleValue();
        }
        String value = getParameter(key);
        if (StringUtils.isEmpty(value)) {
            return defaultValue;
        }
        double d = Double.parseDouble(value);
        getNumbers().put(key, d);
        return d;
    }
    public float getParameter(String key, float defaultValue) {
        Number n = getNumbers().get(key);