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Enterprise Java Beans（EJBs）是一種用于創(chuàng)建開放企業(yè)應(yīng)用程序的技術(shù)。它們具有特定的功能，可幫助系統(tǒng)開發(fā)人員在Java平臺上快速創(chuàng)建大規(guī)模、高性能、復(fù)雜的企業(yè)級應(yīng)用程序。EJB 是一個遠(yuǎn)端對象協(xié)議，允許不同的JavaBean之間進行通信。此外，EJB 也是獨立于平臺和語言之間運行代碼擴展的套件集合。要使用 EJB 服務(wù)器，需要預(yù)先部署 EJB 類或 bean 并將其構(gòu)建到 EJB 工廠中。有很多部署工作就地實施時才能將 bean 部署到 EJB 服務(wù)器中。

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