现在我们使用DI/IOC,当我们需要将额外参数传递给构造函数时,我们使用工厂类,例如publicclassEmailSender{internalEmailSender(stringtoEmail,stringsubject,Stringbody,ILoggeremailLogger){.....}}publicclassEmailSenderFactory{ILoggeremailLogger;publicEmailSenderFactory(ILoggeremailLogger){this.emailLogger=emailLogger;}publicEmailSenderCrea