??????????????????????????
Enterprise Java Beans (EJB)
J2EE????????????????????EJB??????????????????????????????????????????????????????EJB?????EJB??????????????????????????????????????????????????????????,UGG Boot?
EJB?????3????bean??:
1.Stateless session beans: ???????????????????????????????????????????????stateless session bean??????????????
2.Stateful session bean: T?????????????????????????????????????Stateful session bean??????????????????????????????????????
3.Entity beans: ???????????-- ????????? -- ?????????????????????????EJB?????????entity EJB????????????????
????????????EJB????????????????home interface??????????????????EJB?,UGG Boots Clearance????bean????????????????????bean?????????????
??EJB????????????????,Moncler UK?????EJB??????????????????????????????????WebLogic Server 5.1????EJB Deployer Tool?????EJB????????EJB Deployer Tool??????????????JNDI?????EJB?Deployer Tool???wrapper???????????????jar????????Java???????
??EJB???,Dr Dre Headphones???????????JNDI?????EJB????????????home???reference??????????????????? create() ??????????????bean????????????????????bean??????
JavaServer Pages (JSPs)
????????????????Microsoft?Active Server Pages (ASP)????JSP?ASP????????????????????????Web?????????????????????????? ??Web???????????????JSP???JSP???????? JSP???HTML????????Java????????????????????????Java?????????????HTML?????????????
????????JSP???????????????????????????????????????????????????????????Java????????????Java????????????
Date JSP sample
The current date is .
?????????JHTML???JSP???????????WebLogic???????JSP?????JHTML????????????JSP?WebLogic?????????????????????????weblogic.properties?????Web?????????????????????Servlet????JSP?????
Java servlets
servlet????????JSP?似???????????JSP??????HTML????????Java????servlets???Java??????HTML?
servlet??????Java???????Web???????????????????????????????CGI Perl????似?Servlets?CGI???????????????CGI????????????????? -- ?servlets??servlet????????????????servlets???????????????
???servlets???????????javax.servlet.http.HttpServlet ????override????????????
service(): ??dispatcher?????-????
doGet(): ??????HTTP GET???
doPost(): ??HTTP POST??
???????????????HTTP?? -- ????HttpServlet API???
????????J2EE Servlet API??????WebLogic?????????API????????????????servlet??????weblogic.properties ???????????WebLogic???????????
??Java servlets,???????J2EE??????????J2EE????????????????????????????????????RMI, Java IDL?CORBA, JTA, ??XML???,Vibram Fiver Finger Shoes?
???????????????????????????????
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