com.jn.sqlhelper.datasource.driver

类 DriverManagerDataSource

java.lang.Object

com.jn.sqlhelper.datasource.AbstractDataSource

com.jn.sqlhelper.datasource.driver.AbstractDriverBasedDataSource

com.jn.sqlhelper.datasource.driver.DriverManagerDataSource

所有已实现的接口:

Wrapper, CommonDataSource, DataSource

直接已知子类:

SingleConnectionDataSource

public class DriverManagerDataSource
extends AbstractDriverBasedDataSource

Simple implementation of the standard JDBC DataSource interface, configuring the plain old JDBC DriverManager via bean properties, and returning a new Connection from every getConnection call.

NOTE: This class is not an actual connection pool; it does not actually pool Connections. It just serves as simple replacement for a full-blown connection pool, implementing the same standard interface, but creating new Connections on every call.

Useful for test or standalone environments outside of a J2EE container, either as a DataSource bean in a corresponding ApplicationContext or in conjunction with a simple JNDI environment. Pool-assuming Connection.close() calls will simply close the Connection, so any DataSource-aware persistence code should work.

NOTE: Within special class loading environments such as OSGi, this class is effectively superseded by SimpleDriverDataSource due to general class loading issues with the JDBC DriverManager that be resolved through direct Driver usage (which is exactly what SimpleDriverDataSource does).

In a J2EE container, it is recommended to use a JNDI DataSource provided by the container. Such a DataSource can be exposed as a DataSource bean in a Spring ApplicationContext via org.springframework.jndi.JndiObjectFactoryBean, for seamless switching to and from a local DataSource bean like this class. For tests, you can then either set up a mock JNDI environment through Spring's org.springframework.mock.jndi.SimpleNamingContextBuilder, or switch the bean definition to a local DataSource (which is simpler and thus recommended).

If you need a "real" connection pool outside of a J2EE container, consider Apache Commons DBCP or C3P0. Commons DBCP's BasicDataSource and C3P0's ComboPooledDataSource are full connection pool beans, supporting the same basic properties as this class plus specific settings (such as minimal/maximal pool size etc).

从以下版本开始:

3.4.0

另请参阅:

SimpleDriverDataSource

字段概要

从类继承的字段 com.jn.sqlhelper.datasource.AbstractDataSource

logger

构造器概要

构造器

构造器和说明
DriverManagerDataSource() Constructor for bean-style configuration.
DriverManagerDataSource(String url) Create a new DriverManagerDataSource with the given JDBC URL, not specifying a username or password for JDBC access.
DriverManagerDataSource(String url, Properties conProps) Create a new DriverManagerDataSource with the given JDBC URL, not specifying a username or password for JDBC access.
DriverManagerDataSource(String url, String username, String password) Create a new DriverManagerDataSource with the given standard DriverManager parameters.

方法概要

限定符和类型	方法和说明
protected Connection	getConnectionFromDriver(Properties props) Obtain a Connection using the given properties.
protected Connection	getConnectionFromDriverManager(String url, Properties props) Getting a Connection using the nasty static from DriverManager is extracted into a protected method to allow for easy unit testing.
void	setDriverClassName(String driverClassName) Set the JDBC driver class name.

从类继承的方法 com.jn.sqlhelper.datasource.driver.AbstractDriverBasedDataSource

getCatalog, getConnection, getConnection, getConnectionFromDriver, getConnectionProperties, getPassword, getSchema, getUrl, getUsername, setCatalog, setConnectionProperties, setPassword, setSchema, setUrl, setUsername

从类继承的方法 com.jn.sqlhelper.datasource.AbstractDataSource

getLoginTimeout, getLogWriter, getParentLogger, isWrapperFor, setLoginTimeout, setLogWriter, unwrap

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

DriverManagerDataSource

public DriverManagerDataSource()

Constructor for bean-style configuration.

DriverManagerDataSource

public DriverManagerDataSource(String url)

Create a new DriverManagerDataSource with the given JDBC URL, not specifying a username or password for JDBC access.

参数:

url - the JDBC URL to use for accessing the DriverManager

另请参阅:

DriverManager.getConnection(String)

DriverManagerDataSource

public DriverManagerDataSource(String url,
                               String username,
                               String password)

Create a new DriverManagerDataSource with the given standard DriverManager parameters.

参数:

url - the JDBC URL to use for accessing the DriverManager

username - the JDBC username to use for accessing the DriverManager

password - the JDBC password to use for accessing the DriverManager

另请参阅:

DriverManager.getConnection(String, String, String)

DriverManagerDataSource

public DriverManagerDataSource(String url,
                               Properties conProps)

Create a new DriverManagerDataSource with the given JDBC URL, not specifying a username or password for JDBC access.

参数:

url - the JDBC URL to use for accessing the DriverManager

conProps - JDBC connection properties

另请参阅:

DriverManager.getConnection(String)

方法详细资料

setDriverClassName

public void setDriverClassName(String driverClassName)

Set the JDBC driver class name. This driver will get initialized on startup, registering itself with the JDK's DriverManager.

NOTE: DriverManagerDataSource is primarily intended for accessing pre-registered JDBC drivers. If you need to register a new driver, consider using SimpleDriverDataSource instead. Alternatively, consider initializing the JDBC driver yourself before instantiating this DataSource. The "driverClassName" property is mainly preserved for backwards compatibility, as well as for migrating between Commons DBCP and this DataSource.

另请参阅:

DriverManager.registerDriver(java.sql.Driver), SimpleDriverDataSource

getConnectionFromDriver

protected Connection getConnectionFromDriver(Properties props)
                                      throws SQLException

从类复制的说明: AbstractDriverBasedDataSource

Obtain a Connection using the given properties.

Template method to be implemented by subclasses.

指定者:

getConnectionFromDriver 在类中 AbstractDriverBasedDataSource

参数:

props - the merged connection properties

返回:

the obtained Connection

抛出:

SQLException - in case of failure

getConnectionFromDriverManager

protected Connection getConnectionFromDriverManager(String url,
                                                    Properties props)
                                             throws SQLException

Getting a Connection using the nasty static from DriverManager is extracted into a protected method to allow for easy unit testing.

抛出:

SQLException

另请参阅:

DriverManager.getConnection(String, java.util.Properties)