As of my knowledge cutoff in 2021, the latest version of JDBC was JDBC 4.3, which was introduced as part of Java SE 9. Some of the new features that were introduced in JDBC 4.3 include:
- The ability to retrieve the database schema and metadata using the DatabaseMetaData interface, which allows you to get information about the database, tables, columns, and other objects.
- Support for the Java SE 8 date and time classes, such as LocalDate and LocalDateTime, as well as support for the new java.sql.Date and java.sql.Time classes introduced in Java SE 8.
- The ability to use try-with-resources statements with JDBC objects, which simplifies the code and ensures that resources are properly closed.
- The ability to create and execute prepared statements with named parameters, which makes the code more readable and easier to maintain.
- Improved support for retrieving generated keys, which allows you to retrieve the primary key or other generated values after inserting data into a table.
- Support for connection timeouts, which allows you to specify a maximum amount of time that JDBC will wait for a connection to be established before throwing an exception.
- Support for batch updates, which allows you to group multiple SQL statements into a single batch and execute them as a single unit.
Overall, these new features make JDBC easier to use and more powerful, allowing developers to build more robust and efficient database applications.
Jdbc 3.0 Features:
JDBC 3.0 was introduced as part of Java 2 Platform, Standard Edition (J2SE) 1.4. Some of the new features that were introduced in JDBC 3.0 include:
- Savepoint Support: JDBC 3.0 introduces support for savepoints, which allow you to set points in a transaction that you can roll back to if necessary. This feature provides greater control over the transactional behavior of your application.
- Connection Pooling: JDBC 3.0 introduced support for connection pooling, which allows you to reuse connections instead of creating a new one every time you need to interact with the database. This can improve performance and reduce the overhead associated with establishing a new connection.
- RowSet Interface: JDBC 3.0 introduces the RowSet interface, which provides a disconnected view of a ResultSet. This allows you to manipulate data in memory before writing it back to the database.
- Distributed Transactions: JDBC 3.0 includes support for distributed transactions, which allows you to coordinate transactions across multiple databases.
- Parameter Metadata: JDBC 3.0 introduces support for parameter metadata, which allows you to retrieve information about the parameters used in a PreparedStatement. This can help you write more robust and maintainable code.
- Connection Timeouts: JDBC 3.0 introduces support for connection timeouts, which allows you to specify a maximum amount of time that JDBC will wait for a connection to be established before throwing an exception.
Overall, these new features made JDBC 3.0 a significant improvement over its predecessors, providing developers with greater flexibility, control, and performance when interacting with databases.
Jdbc 4.0 Features:
JDBC 4.0 was introduced as part of Java SE 6. Some of the new features that were introduced in JDBC 4.0 include:
- Automatic Resource Management: JDBC 4.0 introduced the ability to automatically close resources such as statements and result sets, using the try-with-resources statement. This feature helps to reduce the amount of boilerplate code required for resource management and helps ensure that resources are properly closed.
- Enhanced Support for BLOBs and CLOBs: JDBC 4.0 introduced improved support for handling binary large objects (BLOBs) and character large objects (CLOBs), making it easier to work with large data types.
- SQLXML Data Type: JDBC 4.0 introduced support for the SQLXML data type, which allows you to work with XML data directly in the database.
- Annotations: JDBC 4.0 introduced support for annotations, which can be used to simplify the code required to access the database. For example, annotations can be used to map database columns to Java fields.
- Scrollable Result Sets: JDBC 4.0 introduced support for scrollable result sets, which allow you to move forward and backward in a result set.
- Improved Support for Connection Failover: JDBC 4.0 introduced improved support for connection failover, which allows your application to automatically switch to a backup database if the primary database fails.
Overall, these new features made JDBC 4.0 a significant improvement over its predecessors, providing developers with greater ease-of-use, improved performance, and increased functionality when interacting with databases.