A simple example of DAO design patterns. DAO (Data Access Object, data access object) is the main function of data manipulation, the standard development process in the program belongs to the operation of the data layer.

DAO_Demo
........\.classpath
........\.project
........\.settings
........\.........\.jsdtscope
........\.........\org.eclipse.jdt.core.prefs
........\.........\org.eclipse.wst.jsdt.ui.superType.container
........\.........\org.eclipse.wst.jsdt.ui.superType.name
........\build
........\.....\classes
........\.....\.......\cn
........\.....\.......\..\mldn
........\.....\.......\..\....\lxh
........\.....\.......\..\....\...\dao
........\.....\.......\..\....\...\...\IEmpDAO.class
........\.....\.......\..\....\...\...\impl
........\.....\.......\..\....\...\...\....\EmpDAOImpl.class
........\.....\.......\..\....\...\...\proxy
........\.....\.......\..\....\...\...\.....\EmpDAOProxy.class
........\.....\.......\..\....\...\...\test
........\.....\.......\..\....\...\...\....\TestDAOInsert.class
........\.....\.......\..\....\...\...\....\TestDAOSelect.class
........\.....\.......\..\....\...\dbc
........\.....\.......\..\....\...\...\DatabaseConnection.class
........\.....\.......\..\....\...\factory
........\.....\.......\..\....\...\.......\DAOFactory.class
........\.....\.......\..\....\...\vo
........\.....\.......\..\....\...\..\Emp.class
........\src
........\...\cn
........\...\..\mldn
........\...\..\....\lxh
........\...\..\....\...\dao
........\...\..\....\...\...\IEmpDAO.java
........\...\..\....\...\...\impl
........\...\..\....\...\...\....\EmpDAOImpl.java
........\...\..\....\...\...\proxy
........\...\..\....\...\...\.....\EmpDAOProxy.java
........\...\..\....\...\...\test
........\...\..\....\...\...\....\TestDAOInsert.java
........\...\..\....\...\...\....\TestDAOSelect.java
........\...\..\....\...\dbc
........\...\..\....\...\...\DatabaseConnection.java
........\...\..\....\...\factory
........\...\..\....\...\.......\DAOFactory.java
........\...\..\....\...\vo
........\...\..\....\...\..\Emp.java
........\WebContent
........\..........\emp_insert.jsp
........\..........\emp_insert_do.jsp
........\..........\META-INF
........\..........\........\MANIFEST.MF
........\..........\WEB-INF
........\..........\.......\lib
........\..........\.......\...\sqljdbc4.jar
........\..........\.......\web.xml

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