【计算机专业文献翻译】数据库访问.doc

Database Access
ALMOST ALL APPLICATIONS MUST deal with saving and preserving data. Although some infor-mation can be stored in property files and the system environment, using a database is a natural way to ease development and increase the scalability of an application. Even if an application isn’t primarily designed for storing and cataloging information, it can still benefit from having easy access to data storage and retrieval.
Databases are the lifeblood of many systems and applications, and being able to understand them and manipulate fortably is important to the career of a software engineer. Data management is such a large task that a database team is an integral part of any medium- to large-anization, and anization can have a number of enterprise database systems.
In this chapter, we’ll discuss how to connect to a database using JDBC (Java Database Connectivity). We’ll use the MySql database for the chapter examples, and we’ll try to keep the code as portable as possible. (We’ll discuss portability and how to plicated relational designs in Chapters 13 and 14.)
Featured in this chapter:
◆ Understanding database connectivity
◆ Using Java Database Connectivity
◆ Basic connection pooling
◆ A sample application illustrating basic database interactions
Database Connectivity and JDBC
Before we look in depth at JDBC, let’s look at the big picture. When a d