java.sql
Class DriverManager

java.lang.Object
  java.sql.DriverManager

public class DriverManager
extends Object

Provides facilities for managing JDBC Drivers.

The DriverManager class will load JDBC drivers during its initialization, from the list of drivers referenced by the System Property "jdbc.drivers".

Method Summary

static void	deregisterDriver(Driver driver) Removes a driver from the DriverManager's registered driver list.
static Connection	getConnection(String url) Attempts to establish a connection to the given database URL.
static Connection	getConnection(String url, Properties info) Attempts to establish a connection to the given database URL.
static Connection	getConnection(String url, String user, String password) Attempts to establish a connection to the given database URL.
static Driver	getDriver(String url) Tries to find a driver that can interpret the supplied URL.
static Enumeration	getDrivers() Returns an Enumeration that contains all of the loaded JDBC drivers that the current caller can access.
static int	getLoginTimeout() Returns the login timeout when connecting to a database, in seconds.
static PrintStream	getLogStream() This method is deprecated.
static PrintWriter	getLogWriter() Retrieves the log writer.
static void	println(String message) Prints a message to the current JDBC log stream.
static void	registerDriver(Driver driver) Registers a given JDBC driver with the DriverManager.
static void	setLoginTimeout(int seconds) Set the login timeout when connecting to a database, in seconds.
static void	setLogStream(PrintStream out) This method is deprecated.
static void	setLogWriter(PrintWriter out) Sets the PrintWriter that will be used by all loaded drivers, and also the DriverManager.

Methods inherited from class java.lang.Object

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

Method Detail

deregisterDriver

public static void deregisterDriver(Driver driver)
                             throws SQLException

Removes a driver from the DriverManager's registered driver list. This will only succeed where the caller's classloader loaded the driver that is to be removed. If the driver was loaded by a different classloader, the removal of the driver will fail silently.

If the removal succeeds, the DriverManager will not in future use this driver when asked to get a Connection.

Throws:

SQLException - if there is an exception accessing the database.

getConnection

public static Connection getConnection(String url)
                                throws SQLException

Attempts to establish a connection to the given database URL.

Parameters:

url - a URL string representing the database target to connect with

Returns:

a Connection to the database identified by the URL. null if no connection can be made.

Throws:

SQLException - if there is an error while attempting to connect to the database identified by the URL

getConnection

public static Connection getConnection(String url,
                                       Properties info)
                                throws SQLException

Attempts to establish a connection to the given database URL.

Parameters:

url - a URL string representing the database target to connect with

info - a set of Properties to use as arguments to set up the connection. Properties are arbitrary string/value pairs. Normally, at least the properties "user" and "password" should be passed, with appropriate settings for the userid and its corresponding password to get access to the database concerned.

Returns:

a Connection to the database identified by the URL. null if no connection can be made.

Throws:

SQLException - if there is an error while attempting to connect to the database identified by the URL

getConnection

public static Connection getConnection(String url,
                                       String user,
                                       String password)
                                throws SQLException

Attempts to establish a connection to the given database URL.

Parameters:

url - a URL string representing the database target to connect with

user - a userid used to login to the database

password - a password for the userid to login to the database

Returns:

a Connection to the database identified by the URL. null if no connection can be made.

Throws:

SQLException - if there is an error while attempting to connect to the database identified by the URL

getDriver

public static Driver getDriver(String url)
                        throws SQLException

Tries to find a driver that can interpret the supplied URL.

Parameters:

url - the URL of a database

Returns:

a Driver that can understand the given URL. null if no Driver understands the URL

Throws:

SQLException - if there is any kind of Database Access problem

getDrivers

public static Enumeration getDrivers()

Returns an Enumeration that contains all of the loaded JDBC drivers that the current caller can access.

Returns:

An Enumeration containing all the currently loaded JDBC Drivers

getLoginTimeout

public static int getLoginTimeout()

Returns the login timeout when connecting to a database, in seconds.

Returns:

the login timeout in seconds

getLogStream

public static PrintStream getLogStream()

This method is deprecated. Gets the log PrintStream used by the DriverManager and all the JDBC Drivers.

Returns:

the PrintStream used for logging activity

getLogWriter

public static PrintWriter getLogWriter()

Retrieves the log writer.

Returns:

A PrintWriter object used as the log writer. null if no log writer is set.

println

public static void println(String message)

Prints a message to the current JDBC log stream. This is either the PrintWriter or (deprecated) the PrintStream, if set.

Parameters:

message - the message to print to the JDBC log stream

registerDriver

public static void registerDriver(Driver driver)
                           throws SQLException

Registers a given JDBC driver with the DriverManager.

A newly loaded JDBC driver class should register itself with the DriverManager by calling this method.

Parameters:

driver - the Driver to register with the DriverManager

Throws:

SQLException - if a database access error occurs.

setLoginTimeout

public static void setLoginTimeout(int seconds)

Set the login timeout when connecting to a database, in seconds.

Parameters:

seconds - seconds until timeout. 0 indicates wait forever.

setLogStream

public static void setLogStream(PrintStream out)

This method is deprecated. Sets the Print Stream to use for logging data from the DriverManager and the JDBC drivers.

Use setLogWriter(PrintWriter) instead.

Parameters:

out - the PrintStream to use for logging.

setLogWriter

public static void setLogWriter(PrintWriter out)

Sets the PrintWriter that will be used by all loaded drivers, and also the DriverManager.

Parameters:

out - the PrintWriter to be used