Spring DAO | Code Factory

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• DAO – Data Access Object it will do data persistence operations. It will interact RDBMS machines, interact with XML files, interact with LDAP machines, interact with NoSQL machines.
• The main aim of DAO is data access operation.
• * In DAO we use Interface implementation pattern. So in future if we want to change DB then it is easy to do.
• * Below are the implementations provider and implementations for connection pool.
  • Sun -> DataSource (I)
  • Apache -> BasicDataSource (C)
  • Mchange c3p0 -> ComboPooledDataSource (C)
  • Spring -> DriverManagerDataSource (C)
  • WebLogic -> WebLogic Data Source
• For small enterprice application if you want to use connection pool then ComboPooledDataSource and BasicDataSource is recommended.

1. Spring – Difference between JDBC and Spring JDBC
2. Spring – Data Source and Connection Pool