Feign Client没办法查询参数

这是我的界面.

public interface SCIMServiceStub {

    @RequestLine("GET /Users/{id}")
    SCIMUser getUser(@Param("id") String id);

    @RequestLine("GET /Groups?filter=displayName Eq {roleName}")
    SCIMGroup isValidRole(@Param("roleName") String roleName);

}

在这里getUser调用正常.但是isValidRole不能正常工作，因为最终会这样发送请求.

Here getUser call works fine. But isValidRole is not working properly as the request is eventually sent like this.

/Groups?filter=displayName Eq {roleName}"

此处{roleName}无法解析.我在这里想念什么?谢谢您的帮助，因为我对此一无所知.

Here {roleName} is not resolved. What am I missing here? Appreciate some help, as I'm clueless at this point.

修改:还有1个问题:是否可以避免自动对查询参数进行网址编码?

Edit: 1 more question: Is there a way to avoid automatic url encoding of query parameters?