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 (value <= 0) {
            return defaultValue;
        }
        return value;
    }
    public char getMethodParameter(String method, String key, char defaultValue) {
        String value = getMethodParameter(method, key);
        if (StringUtils.isEmpty(value)) {
            return defaultValue;
        }
        return value.charAt(0);
    }
    public boolean getMethodParameter(String method, String key, boolean defaultValue) {
        String value = getMethodParameter(method, key);
        if (StringUtils.isEmpty(value)) {
            return defaultValue;
        }
        return Boolean.parseBoolean(value);
    }
    public boolean hasMethodParameter(String method, String key) {
        if (method == null) {
            String suffix = "." + key;
            for (String fullKey : parameters.keySet()) {
                if (fullKey.endsWith(suffix)) {
                    return true;
                }
            }
            return false;
        }
        if (key == null) {