什么是多层结构？
采集日期：2008-4-26作者：zgqtxwd(注：本数据由系统自动采集，内容与BHCODE无关)
The Java Pet Store demo Client tier consists of abrowser displaying web pages generated from JSP pages in theWeb tier.Some objects within the Web tier act as proxies tocomponents in the Enterprise JavaBeans components tier.The Enterprise JavaBeans components tier is responsible for anyprocessing involving Enterprise JavaBeans components.Stand-alone clients and web applications in the Web tier can useEnterprise JavaBeans components hosted by the Enterprise JavaBeanscomponents tier.