3 Tier Architecture - In need of an example

Question

Presently I am working using single tier architecture. Now I am wanting to learn how to write code using 3 tier architecture. Please can you provide me with a simple example

Answer 1

3-tier architecture can have different meanings depending on context. Generally it means that responsibilities in the application are divided between different tiers. Typically, 3-tier refers to :

• presentation tier" (actual user interface)
• logic tier (application/business logic)
• data tier (database, data storage)

The details vary by application.

Wikipedia, as usual, has a nice overview: http://en.wikipedia.org/wiki/Multitier_architecture

A simple example would be a typical business app:

• presentation: browser, or fat client
• logic tier: business logic, typically in an application server (based on J2EE, ASP.NET or whatever)
• data tier: a database, typically a RDBMS such as MySQL or Oracle