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`
if (n != null) {
            return n.floatValue();
        }
        String value = getParameter(key);
        if (StringUtils.isEmpty(value)) {
            return defaultValue;
        }
        float f = Float.parseFloat(value);
        getNumbers().put(key, f);
        return f;
    }
    public long getParameter(String key, long defaultValue) {
        Number n = getNumbers().get(key);
        if (n != null) {
            return n.longValue();
        }
        String value = getParameter(key);
        if (StringUtils.isEmpty(value)) {
            return defaultValue;
        }
        long l = Long.parseLong(value);
        getNumbers().put(key, l);
        return l;
    }
    public int getParameter(String key, int defaultValue) {
        Number n = getNumbers().get(key);
        if (n != null) {
            return n.intValue();
        }
        String value = getParameter(key);