java-design-patterns/dao/index.md

layout, title, folder, permalink, categories, tags

layout	title	folder	permalink	categories	tags
pattern	Data Access Object	dao	/patterns/dao/	Architectural	Java Difficulty-Beginner

Intent: Object provides an abstract interface to some type of database or other persistence mechanism.

Applicability: Use the Data Access Object in any of the following situations

• when you want to consolidate how the data layer is accessed
• when you want to avoid writing multiple data retrieval/persistence layers

Credits:

• J2EE Design Patterns