JDBC 2.0 Optional Package framework version update description in the JAVA class library
JDBC 2.0 Optional Package framework version update description in the JAVA class library
JDBC (Java database connection) is a set of APIs used to connect and operate databases in the Java class library.The JDBC 2.0 Optional Package framework provides JDBC with extension functions and higher -level features.This article will introduce the version update description of the JDBC 2.0 Optional Package framework and provide the corresponding Java code example.
1. JDBC 2.0 Optional Package framework version 1.0 update description
-The new interface: javax.sql.connectionPoolDataSource is used to support the connection pool.
-It introduced javax.sql.pooledconnection interface for access from the connection pool.
Below is a simple example code, demonstrate how to use the connection pool to obtain the database connection:
import javax.sql.ConnectionPoolDataSource;
import javax.sql.PooledConnection;
import java.sql.Connection;
import java.sql.SQLException;
public class ConnectionPoolExample {
public static void main(String[] args) {
// Create the data source of the connection pool
ConnectionPoolDataSource dataSource = createDataSource();
// Get connection from the connection pool
try (PooledConnection pooledConnection = dataSource.getPooledConnection()) {
// Get connection
Connection connection = pooledConnection.getConnection();
// Execute the database operation
// ...
} catch (SQLException e) {
e.printStackTrace();
}
}
private static ConnectionPoolDataSource createDataSource() {
// Create and configure the data source of the connection pool
// ...
return dataSource;
}
}
2. JDBC 2.0 Optional Package framework version 2.0 update description
-It introduced javax.sql.Rowset.rowsetProvider class to create a collection object.
-The new interface: javax.sql.Rowset.cachedrowset is used to use the cache lines when disconnecting the database connection.
-It introduced javax.sql.Rowset.filterRedRowset interface for filtering collection data.
Below is a simple example code. Demonstration of how to use the lines and cache sets for database operations:
import javax.sql.rowset.CachedRowSet;
import javax.sql.rowset.FilteredRowSet;
import javax.sql.rowset.RowSetProvider;
import java.sql.SQLException;
public class RowSetExample {
public static void main(String[] args) {
try (CachedRowSet cachedRowSet = RowSetProvider.newFactory().createCachedRowSet()) {
// Set the database connection information
cachedRowSet.setUrl("jdbc:mysql://localhost:3306/mydb");
cachedRowSet.setUsername("username");
cachedRowSet.setPassword("password");
cachedRowSet.setCommand("SELECT * FROM employees");
cachedRowSet.execute();
// Operate the line set
while (cachedRowSet.next()) {
// Processing data
String name = cachedRowSet.getString("name");
int age = cachedRowSet.getInt("age");
// ...
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}
By reading this article, you can understand the version update description of the JDBC 2.0 Optional Package framework, and understand how to use new features and functions through the Java code example provided.These updates provide more powerful and flexible database operation capabilities for Java developers.
