Table of Contents
In this article, we’ll learn about Interfaces of JDBC like Driver Interface, Connection Interface, Statement Interface, PreparedStatement Interface, CallableStatement Interface and more.
Java Database Connectivity (JDBC) acts as a bridge between Java applications and relational databases. At the heart of this interaction lie interfaces, which define functionalities without implementation specifics. Let’s delve into these key interfaces to understand how JDBC interacts with databases.
1. Driver Interface
This interface serves as a blueprint for JDBC drivers, which are software components responsible for translating between Java code and database-specific protocols. While the implementation details vary across databases, the Driver interface ensures a consistent interaction for your Java program.
2. Connection Interface
This interface represents an established connection between your Java program and a specific database. It provides methods for creating statements, managing transactions, and closing the connection after use.
3. Statement Interface
The Statement interface acts as the foundation for executing SQL statements. It offers methods to execute queries that retrieve data (executeQuery()), update data (executeUpdate()), or execute other SQL statements like CREATE TABLE.
4. PreparedStatement Interface
A subclass of Statement, PreparedStatement is optimized for repeatedly executing the same SQL statement with different parameters. It prevents SQL injection vulnerabilities by separating the SQL code from the data being inserted.
5. CallableStatement Interface
This interface extends PreparedStatement and caters specifically to calling stored procedures, which are pre-compiled SQL code blocks stored within the database.
6. ResultSet Interface
The ResultSet interface represents the outcome of executing a query that retrieves data. It provides methods to navigate through the results, access data by column name or index, and determine the data type of each column.
7. ResultSetMetaData Interface
This interface provides metadata about a ResultSet, such as the number of columns, their names, and data types. This information is crucial for proper data handling within your Java program.
8. DatabaseMetaData Interface
The DatabaseMetaData interface offers information about the database itself, including its product name, version, supported features, and available tables.
Beyond the Core: Additional Interfaces
JDBC offers optional interfaces like RowSet, which provides a more disconnected and scrollable view of query results. These additional interfaces cater to specific use cases and extend the capabilities of JDBC.
In Conclusion
By understanding these interfaces, you gain a deeper understanding of how JDBC interacts with databases. These interfaces provide a standardized way for Java programs to connect, execute SQL statements, and process results, making database access in Java applications efficient and secure.
