2.7.0版本getContextPath方法：
```
protected String getContextPath(URL url) {
        String contextPath = url.getPath();
        return contextPath.endsWith("/") ? contextPath.substring(0,contextPath.length()-1) : contextPath;
    }
```
无法将方法置入web容器中，退回2.6.5版本的方法：
```
protected String getContextPath(URL url) {
        int pos = url.getPath().lastIndexOf("/");
        return pos > 0 ? url.getPath().substring(0, pos) : "";
    }
```
使用正常，两个方法应该不等价的。
}
    @Test
    public void test_javaNetUrl() throws Exception {
        java.net.URL url = new java.net.URL("http://admin:hello1234@10.20.130.230:20880/context/path?version=1.0.0&application=morgan#anchor1");
        assertEquals("http", url.getProtocol());
        assertEquals("admin:hello1234", url.getUserInfo());
        assertEquals("10.20.130.230", url.getHost());
        assertEquals(20880, url.getPort());
        assertEquals("/context/path", url.getPath());
        assertEquals("version=1.0.0&application=morgan", url.getQuery());
        assertEquals("anchor1", url.getRef());
        assertEquals("admin:hello1234@10.20.130.230:20880", url.getAuthority());
        assertEquals("/context/path?version=1.0.0&application=morgan", url.getFile());
    }
    @Test
    public void test_Anyhost() throws Exception {
        URL url = URL.valueOf("dubbo://0.0.0.0:20880");
        assertEquals("0.0.0.0", url.getHost());
        assertTrue(url.isAnyHost());
    }
    @Test
    public void test_Localhost() throws Exception {
        URL url = URL.valueOf("dubbo://127.0.0.1:20880");
        assertEquals("127.0.0.1", url.getHost());
        assertTrue(url.isLocalHost());
        url = URL.valueOf("dubbo://127.0.1.1:20880");
        assertEquals("127.0.1.1", url.getHost());
        assertTrue(url.isLocalHost());
        url = URL.valueOf("dubbo://localhost:20880");
        assertEquals("localhost", url.getHost());