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。
}
        }
        String hostToRegistry = ConfigUtils.getSystemProperty(Constants.DUBBO_IP_TO_REGISTRY);
        if (StringUtils.isEmpty(hostToRegistry)) {
            hostToRegistry = NetUtils.getLocalHost();
        }
        map.put(Constants.REGISTER_IP_KEY, hostToRegistry);
        ref = createProxy(map);
        ApplicationModel.initConsumerModel(getUniqueServiceName(), buildConsumerModel(attributes));
    }
    private ConsumerModel buildConsumerModel(Map<String, Object> attributes) {
        Method[] methods = interfaceClass.getMethods();
        Class serviceInterface = interfaceClass;
        if (interfaceClass == GenericService.class) {
            try {
                serviceInterface = Class.forName(interfaceName);
                methods = serviceInterface.getMethods();
            } catch (ClassNotFoundException e) {
                methods = interfaceClass.getMethods();
            }
        }
        return new ConsumerModel(getUniqueServiceName(), serviceInterface, ref, methods, attributes);
    }
    @SuppressWarnings({"unchecked", "rawtypes", "deprecation"})
    private T createProxy(Map<String, String> map) {
        if (shouldJvmRefer(map)) {
            URL url = new URL(Constants.LOCAL_PROTOCOL, Constants.LOCALHOST_VALUE, 0, interfaceClass.getName()).addParameters(map);
            invoker = refprotocol.refer(interfaceClass, url);
            if (logger.isInfoEnabled()) {
                logger.info("Using injvm service " + interfaceClass.getName());