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`
}
    public String toFullString() {
        if (full != null) {
            return full;
        }
        return full = buildString(true, true);
    }
    public String toFullString(String... parameters) {
        return buildString(true, true, parameters);
    }
    public String toParameterString() {
        if (parameter != null) {
            return parameter;
        }
        return parameter = toParameterString(new String[0]);
    }
    public String toParameterString(String... parameters) {
        StringBuilder buf = new StringBuilder();
        buildParameters(buf, false, parameters);
        return buf.toString();
    }
    private void buildParameters(StringBuilder buf, boolean concat, String[] parameters) {
        if (CollectionUtils.isNotEmptyMap(getParameters())) {
            List<String> includes = (ArrayUtils.isEmpty(parameters) ? null : Arrays.asList(parameters));
            boolean first = true;
            for (Map.Entry<String, String> entry : new TreeMap<>(getParameters()).entrySet()) {
                if (entry.getKey() != null && entry.getKey().length() > 0
                        && (includes == null || includes.contains(entry.getKey()))) {
                    if (first) {
                        if (concat) {