import org.apache.commons.dbcp.DriverConnectionFactory; //导入依赖的package包/类
public void setUp() throws Exception {
    super.setUp();

    // create a GeronimoTransactionManager for testing
    transactionManager = new TransactionManagerImpl();

    // create a driver connection factory
    Properties properties = new Properties();
    properties.setProperty("user", "username");
    properties.setProperty("password", "password");
    ConnectionFactory connectionFactory = new DriverConnectionFactory(new TesterDriver(), "jdbc:apache:commons:testdriver", properties);

    // wrap it with a LocalXAConnectionFactory
    XAConnectionFactory xaConnectionFactory = new LocalXAConnectionFactory(transactionManager, connectionFactory);

    // create the pool
    pool = new GenericObjectPool();
    pool.setMaxActive(getMaxActive());
    pool.setMaxWait(getMaxWait());

    // create the pool object factory
    PoolableConnectionFactory factory = new PoolableConnectionFactory(xaConnectionFactory, pool, null, "SELECT DUMMY FROM DUAL", true, true);
    pool.setFactory(factory);

    // finally create the datasource
    ds = new ManagedDataSource(pool, xaConnectionFactory.getTransactionRegistry());
    ds.setAccessToUnderlyingConnectionAllowed(true);
}
 

import org.apache.commons.dbcp.DriverConnectionFactory; //导入依赖的package包/类
/**
 * 
 */
public DbcpPoolDataSource(final String dataSourceName, 
        final String driverClass, 
        final String url, 
        final String username, 
        final String password,
        final int minIdle,
        final int maxIdle,
        final int maxActive,
        final long maxWait) throws PoolException{
    try {
        ds = AccessController.doPrivileged( new PrivilegedExceptionAction<DataSource>() {
            public DataSource run() throws Exception {
                // create a driver connection factory
                driver = JDBCDriverLoader.loadDriver(driverClass);

                Properties properties = new Properties();
                properties.setProperty("user", username); // $NON-NLS-1$
                properties.setProperty("password", (StringUtil.isEmpty(password) ? "":password)); // $NON-NLS-1$

                ConnectionFactory connectionFactory = new DriverConnectionFactory(driver, url, properties);

                // create the pool
                pool = new GenericObjectPool();
                pool.setMaxActive(maxActive);
                pool.setMaxWait(maxWait);
                pool.setMaxIdle(maxIdle);
                pool.setMinIdle(minIdle);

                // create the pool object factory
                PoolableConnectionFactory factory = new PoolableConnectionFactory(connectionFactory, pool, null, null, false, true);
                pool.setFactory(factory);

                // finally create the datasource
                PoolingDataSource bds = new PoolingDataSource(pool);

                return bds;
            }
        });

    } catch (Exception e) {
        String msg = "Unable to initialize the shared connection pool DataSource"; // $NLX-DbcpPoolDataSource.Unabletoinitializethesharedconnec-1$[["connection pool" is a technical term related to databases]]
        // Note, this resource key is used elsewhere in this plugin
        // "Unable to initialize the shared connection pool DataSource"
        //String msg = com.ibm.xsp.extlib.relational.ResourceHandler.getSpecialAudienceString("DbcpPoolDataSource.Unabletoinitializethesharedconnec");//$NON-NLS-1$
        throw new PoolException( e, msg);
    }
}