Driver
JDBC drivers must implement the Driver interface, and the implementation must contain a static initializer that will be called when the driver is loaded. This initializer registers a new instance of itself with the DriverManager (no more in 4.1)
Example static initializer for a driver implementing java.sql.Driver
public class AcmeJdbcDriver implements java.sql.Driver {
static {
java.sql.DriverManager.registerDriver(new
AcmeJdbcDriver());
}
...
}
When a Driver implementation is loaded, the static initializer will automatically register an instance of the driver.
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Load
The client using this driver may assume that the JDBC driver classes are:
- in the current Java - What is the Classpath?
- or in the JRE extensions directory
Vendor Implementations
You can use JDBC drivers to connect to the following data sources:
- Relational Databases Servers such as Teradata, Oracle, IBM DB2, Microsoft SQL Server, Sybase, Informix, MySQL, PostgreSQL, etc
- Desktop Databases including Microsoft Access, Hypersonic SQL, Dbase, FoxPro, Microsoft Excel, etc.
- LDAP directories,
- Non-relational Databases such as IMS, ADABASE, DATACOM, VSAM, etc, by using third-party adapters (iWay, Attunity, Hit Software are examples of solution providers)