jsp的作用域范圍有幾種？Name scope application is valid in all applications session is valid in the current ses

jsp的作用域范圍有幾種？

Name scope application is valid in all applications session is valid in the current session request is valid in the current request page is valid in the current page

servlet/JSP中的session函數(shù)是通過(guò)scope的概念實(shí)現(xiàn)的，它分為四種類型：page is valid in the current page（只在JSP中使用）。請(qǐng)求在當(dāng)前請(qǐng)求中有效。會(huì)話在當(dāng)前會(huì)話中有效。應(yīng)用程序適用于所有應(yīng)用程序。