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Corba:
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◎ CORBA mapping the corresponding function via interface
◎ PL / SQL can only run in the database
◎ Corba and J2EE differences, the former can write in any language, and J2EE is not line, DCOM is not cross-platform, J2EE emphasizes the BS architecture
◎ C uses a pure virtual function, abstract class to replace the interface in Java
◎ Corba uses IDL to define interfaces
◎ IN, OUT, INOUT
Incoming parameters, outgoing parameters return value for function
OUT, incoming parameters, return value is this parameter
Inout, incoming parameters, return values are this parameter
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