| As human beings'aspiration for modularization of software manufacture being higher and higher and the object-oriented technique becoming mature,component technique was adverted by more and more people.In a great deal of component- developing criterions.the Java2 Enterprise Edition(J2EE) exceeds others depending on its'individual advantages.Further more.its'Enterprise Java Beans(EJB) technique was applied in a number of software-developing teams around world because the components which are developed with this technique have the excellent capacity of working in various application server.There are many different developing models when we are going to use EJB.and in this paper we call these models "structure framework'Mn our research we classified six kind of EJB structure frameworks and discussed their principles respectively.comparing them from several aspects,analyzing their virtues and defects,and listing their applicabilities ultimately.In the first chapter of this paper we introduced the emergence and evolution of component technique as well as the leading component-developing technologies curtly.In the second chaper we expatiated the programming model of J2EE and the EJB technique mainly.ln the third chapter we analysed and compared the six EJB structure frameworks in detail.And in the last chapter we made a simple summarize.
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