May 2015
Intermediate to advanced
234 pages
4h 18m
English
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Chapter 4. Querying a Database
In this chapter, we will cover the following recipes:
- Connecting to a database
- Creating a DAO class
- Calling a DAO method from a controller class
- Saving an object
- Retrieving an object
- Retrieving a list of objects
- Retrieving a list of objects with their dependencies
- Updating an object
- Deleting an object
- Finding the number of results for an SQL query
- Saving a list of objects at once
- Reverting incomplete database modifications using transactions
- Using Hibernate for powerful object persistence and querying
Introduction
JDBC (Java Database Connectivity) and Hibernate are the two most commonly used technologies to query a database from a Spring application.
For small projects and simple data models, JDBC is straightforward; you write your ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.