【正文】
它們不像 EJB那樣有巨頭支持,但其在庶民間卻更加流行,并且也被一些對 EJB深感失望的企業(yè)所采用。當(dāng)然, EJB所被賦予的使命,如對象關(guān)系映射和事務(wù)管理確實有其天然復(fù)雜性,但其 API之復(fù)雜還是令開發(fā)人員們覺得望而卻步,一些人開始懷疑 EJB除了引入了復(fù)雜的實現(xiàn)手段以外似乎并未帶來什么實際好處。frontend39。第五級 樣例文本 A ? Gemmi Cong 精美 PPT模板盡在如下豆單 ? ? 歡迎大家欣賞和下載 樣例文本 A ? Gemmi Cong 精美 PPT模板盡在如下豆單 ? ? 歡迎大家欣賞和下載 樣例文本 B ? The EJB specification intends to provide a standard way to implement the backend 39。 interface code). Such code addresses the same types of problems, and solutions to these problems are often repeatedly reimplemented by programmers. Enterprise JavaBeans are intended to handle such mon concerns as persistence, transactional integrity, and security in a standard way, leaving programmers free to concentrate on the particular problem at hand. ? Accordingly, the EJB specification details how an application server provides: 樣例文本 C ? 由于 IBM和 S