How Data Access Object (DAO) class will handle the data

Suppose there are 2500 records to be handled? How Data Access Object (DAO) class will handle it?

Interview Candidate
May 1st, 2006
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Jagadeeswara Reddy

May 5th, 2006

In JDBC there are two types of row sets 1. Web Row Set 2. Cached Row Set By using these row set we can handle the records .

phdsong
Profile Answers by phdsong

Aug 26th, 2008

DAO is one of design patterns. The Data Access Object (or DAO) pattern: 1. Separates a data resource's client interface from its data access mechanisms, 2. adapts a specific data resource's access API to a generic client interface.
The DAO pattern allows data access mechanisms to change independently of the code that uses the data.

Read the following.
java . sun . com/blueprints/patterns/DAO.html
java . sun . com/blueprints/corej2eepatterns/Patterns/DataAccessObject.html

mani.sivapuram
Profile Answers by mani.sivapuram Questions by mani.sivapuram

Feb 14th, 2011

When we send the data from front end like JSP or HTML etc then the controller is going to take the data and send it to service layer the service layer takes that data and send it to DAO layer in DAO layer we write the JDBC or Hibernate logic to store the data into database if any exception is occured then take the error message and put it in request object so in the forntend take the error message from request object and dispaly the error message.