中间件复习课摘记word版.docxVIP

《中间件及软件组件》复习题题型：选择题（40）+简答题（30）+程序题（30）部分简单题：（仅为个人的手稿摘记，仅供参考）CORBA开发步骤：定义IDL接口将IDL接口文件编译成目标语言文件实现远程对象开发服务器端开发客户端JAVAC编译测试CORBA的核心概念：Stub的作用（见题24）EJB3.0标准SSB:表示业务逻辑EB：表示数据层SSB通过使用注入机制对EB进行读取@Stateless：标注为SSB@Stateless( mappedName= ”ejb/StudentBean”)mappedName的含义：SSB的JNDI名称程序题RMI接口（10分）package mia.ham;import java.rmi.Remote; //关键得分点import java.rmi.RemoteException;import java.util.*;public interface MyInerface extends Remote //关键得分点{public long ComputeSquareSum(int N) throws RemoteException;}Student.java (20分)EJB3.0开发中的Entity Bean考点：9. JDBC-ODBC桥的数据源URL的格式是什么？jdbc:odbc:MyDataSource12.一个Java bean 要能“序列化”，需要实现什么接口？java.io.Serializable17.jdk 1.x的RMI JNDI命名目录服务器是什么？rmiregistry24.什么是Stub,Skelton,他们的作用是什么？stub stands for a client side object participating in the distributed object communication.The stub is responsible for:initiating the communication towards the server?skeletontranslating calls from the caller objectmarshalling?of the parametersinforming the?skeleton?that the call should be invokedpassing arguments to the?skeleton?over the networkunmarshalling?of the response from the?skeletoninforming the?skeleton?that the call is completeskeleton stands for a server side object participating in distributed object communication.The skeleton is responsible for:translating incoming data from the?stub?to the correct up-calls to server objectsunmarshalling?of the arguments from received datapassing arguments to server objectsmarshalling?of the returned values from server objectspassing values back to the client?stub?over the network27.在JDK1.X(X5)把一个IDL文件映射成Java目标代码的编译器及其主要选项是什么？编译器：idlj idlj [选项] idl 文件选项 : -fside , -d符号, -emitAll, -i包含路径 , -v, -version .28.什么是中间件？试举出若干重要的技术？中间件是介于应用层与系统层的软件层。RMI ;RMI/IIOP; CORBA; J2EE EJB29.DCOM是中间件技术吗？是35.标注@StatelesS是做什么用的？@Stateless 注释指明这是一个无状态会话Bean36.对于Glassfish ejb container 来说@Stateless(mappedName=”ejb/StudentBean”)属性值mappedName指的是什么？mappedName ：A product specific name(e.g. global JNDI name) that this session bean should be mapped