与其把类命名为ABCService, 不如叫AbcService
ABC是个专有名词，一般情况下对应的service应该叫做ABCService; 然而，我建议还是叫AbcService,否则对应的实例名会很别扭：

    private ABCService abcService;    public void setAbcService(ABCService abcService) {        this.abcService = abcService;    }