J2EE框架介绍

1、introduction to j2ee1introduction to java 2 enterprise editionpresented by communication & collaboration technologiesdivision of the chief information officerrensselaer polytechnic institutewelcome!introduction to j2ee2main topics introduction the goal the problem the solution what is j2ee? the

2、j2ee framework case studies / examplesintroduction to j2ee3introduction “ “enterprises today need to extend their reach, reduce their costs, and lower their response times”simplified guide to the java 2 platform, enterprise edition, sun microsystems, inc.introduction to j2ee4introductionit must prov

3、ide:high quality services highly available secure scalablepowerful services useful flexible extensibleaffordableintroduction to j2ee5the problem produce purchase support maintain replacecomplex software is expensive to:difficult tasks!introduction to j2ee6?the problemwhy not delegate components to d

4、ifferent departments?departmental solutions are:limited in scope difficult to be aware of enterprise- wide requirements and initiativesdifficult to leverage diverse interoperabilty standardsintroduction to j2ee7cost and complexitysolution: leverage reusable software componentslimited scope and impac

5、tsolution: provide interfaces that enable enterprise-wide application developmentdiverse standardssolution: utilize existing standards and software componentsstrength: leveraged departmental core compentenciesstrongly defined roles and software interfaces allow maximum collaborationthe solutionintro

6、duction to j2ee8what is j2ee?what is java 2 enterprise edition?the java 2 platform, enterprise edition reduces the cost and complexity of developing . multi-tier services, resulting in services that can be rapidly deployed and easily enhanced“ simplified guide to the java 2 platform, enterprise edit

7、ion, sun microsystems, inc.introduction to j2ee9what is j2ee? enabling technology standards based application model a common architecture that provides key common functionality: security session management scalabilityj2ee provides:introduction to j2ee10what is j2ee? applications architecture partiti

8、oning of application logic improves maintainability simplifies software upgrades and managementwhat does multi-tier mean?introduction to j2ee11what is j2ee? enables increased aggregate functionality reduces component maintenance cost separation of workload to improve scalability and reliability stro

9、ng separation prevents vendor lock-inwhat does multi-tier mean?introduction to j2ee12some historytwo tier application (thin client) easy to upgrade client expensive to scale and to add functionality*business logicserverclient*introduction to j2ee13some historytwo tier application (client/server) str

10、ong scalability poor upgradability and difficult managementserverclientintroduction to j2ee14todaythree tier application thin clients make easy upgrades centralized application server management is easier to manage model allows for horizontal scalabilityclientapp serverserverintroduction to j2ee15to

11、daythree tier application thin clients make easy upgrades centralized application server management is easier to manage model allows for horizontal scalabilityclientapp serverserverintroduction to j2ee16todayintroduction to j2ee17n-tier application view application server as a data store leverage da

12、ta abstraction todayintroduction to j2ee18n-tier applicationintroduction to j2ee19n-tier applicationbannerldapintroduction to j2ee20n-tier applicationintroduction to j2ee21n-tier applicationintroduction to j2ee22n-tier applicationintroduction to j2ee23n-tier complexityintroduction to j2ee24business

13、logicintroduction to j2ee25business logicdataprocessoutputinputdataintroduction to j2ee26n-tier complexityintroduction to j2ee27n-tier complexityintroduction to j2ee28n-tier complexityintroduction to j2ee29n-tier complexityintroduction to j2ee30n-tier complexityintroduction to j2ee31n-tier complexit

14、yintroduction to j2ee32servletsjsp/xml/xsltsessionbeansentitybeansj2eeintroduction to j2ee33j2eeservletsjsp/xml/xsltsessionbeansentitybeansintroduction to j2ee34example: the kioskintroduction to j2ee35example: the kioskservletsjsp/xml/xsltsessionbeansentitybeansarticlecategoryget articleclient viewadmin viewresto