Entities

• Entities act as Wrapper classes to our database tables
• Create a sub package under current package and name it as Entities.
• Create a new class with Entity Name
• This is basically the name of your Table such as Person,Department etc
• Annotate the class with @Entity from javax.persistance.
• Annotate with @Table annotation to add table name.
• This annotation is not mandatory(by default creates a table with class name)
• Create Primary key data variable and annotate with @ID,@Column(name="column name")
• Add more data members which will act as columns of database.
• Annotate these with @Column(name="columnname")
• Generate getters and setters.
• Add empty constructor and non empty constructor.
• Add Data Access Object(DAO) classes or Repository Classes for entities.
• We can create a separate package for these.
• Add Session Data variable from Org.Hibernate.Session.
• Add a Constructor which takes Session Factory as parameter.
• Open session in this constructor using Session Factory and assign to data variable Session.
• All the CRUD operations performed will be a part of this class.