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`
URL url = URL.valueOf("ad@min111:haha@1234@2001:0db8:85a3:08d3:1319:8a2e:0370:7344:20880/context/path?version=1.0.0&application=morgan");
        assertNull(url.getProtocol());
        assertEquals("ad@min111", url.getUsername());
        assertEquals("haha@1234", url.getPassword());
        assertEquals("2001:0db8:85a3:08d3:1319:8a2e:0370:7344", url.getHost());
        assertEquals(20880, url.getPort());
        assertEquals("context/path", url.getPath());
        assertEquals(2, url.getParameters().size());
        assertEquals("1.0.0", url.getParameter("version"));
        assertEquals("morgan", url.getParameter("application"));
    }
    @Test
    public void testIpV6AddressWithScopeId(){
        URL url = URL.valueOf("2001:0db8:85a3:08d3:1319:8a2e:0370:7344%5/context/path?version=1.0.0&application=morgan");
        assertNull(url.getProtocol());
        assertEquals("2001:0db8:85a3:08d3:1319:8a2e:0370:7344%5", url.getHost());
        assertEquals(0, url.getPort());
        assertEquals("context/path", url.getPath());
        assertEquals(2, url.getParameters().size());
        assertEquals("1.0.0", url.getParameter("version"));
        assertEquals("morgan", url.getParameter("application"));
    }
    @Test
    public void testDefaultPort() {
        Assertions.assertEquals("10.20.153.10:2181", URL.appendDefaultPort("10.20.153.10:0", 2181));
        Assertions.assertEquals("10.20.153.10:2181", URL.appendDefaultPort("10.20.153.10", 2181));
    }
}