The driver manager serves the request from the application using one of the lists of available driver objects. As we learned earlier, the traditional way to create a connection object is to use the drivermanager class with a connection url in the following format. Tries to establish a connection with the data source that this sqlserverdatasource object represents by using the given user name and password syntax. Establishing a connection the java tutorials jdbctm. I have tried url without any properties and with instance property and with just user and pasword property, i have also tried getconnection with and without password. The usual way to do this would be to factor out the connection creation into another class, and inject an instance of that into the class in question. The drivermanager class maintains a list of driver classes that have registered themselves by calling the method drivermanager. Use the form of the getconnection method that specifies url with property value. Specifying the info argument is an alternative to specifying propertyvalue. Now i remove all references to the swing framework, my code works on all solaris, linux and windows. The use of a datasource object is the preferred means of connecting to a data source. The internals i am not quite sure also,the cpu july patch updates the jdbc driversclasses12. All setlogintimeout does is set the above property and pass it to the network. The url argument represents a data source, and indicates what type of jdbc connectivity you are using the info argument is an object of type java.
There are several ways to specify a user id and password for a connection. The basic service for managing a set of jdbc drivers. Properties public void setconnectionproperties properties connectionproperties nnectionproperties connectionproperties. See properties for the ibm data server driver for jdbc and sqlj for the. In java what is the difference between drivermanager. The drivermanager chooses the first registered driver that accepts this url. A url that identifies a driver and contains information about the database to connect to must be known. Then, click the mysql jdbc driver from the available libraries list. The drivermanager methods getconnection and getdrivers have been. Place the properties file under src if you are using eclipse or webinfclasses if you are using ant or gradle or any other tool for that matter and then modify the. Each jdbc driver contains one or more classes that implements the interface java.
If not then the problem is further downstream, in the network transport, socket, or os layers. 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. When using getconnectionstring url, string user, string password its not required to set this property as it is passed as parameter, but you will have to set it when using getconnectionstring url, properties info or jtdsdatasource. Note that this faq addresses specific technical questions only and are used to document solutions to frequent customer questions as well as any known problems. The cloudera jdbc driver for apache hive is used for direct sql and hiveql access. The use of a datasource object is the preferred means of connecting to a data source as part of its initialization, the drivermanager class will attempt to load the driver classes referenced in the jdbc. Oracle 10g database server distribution also includes ojdbc14. The drivermanager class acts as an interface between user and drivers. In windows vista and later versions of windows, the unified device property model includes device driver properties that characterize a device driver.
The following are top voted examples for showing how to use java. This section provides information about connection url used by drivermanager to create a database connection. Dear readers, these jdbc interview questions have been designed specially to get you acquainted with the nature of questions you may encounter during your interview for the subject of jdbc. Cloudera jdbc driver for hive installation and configuration guide. The url parameter of the getconnection method is a database url that specifies the subprotocol the database connectivity mechanism, the database or database server identifier, and a list of properties. Properties public void setconnectionpropertiesproperties connectionproperties nnectionproperties connectionproperties.
That is definitely a danger of taking this approach when writing mockbased tests. However, you should use the property keys to access these properties on windows vista and later versions. These examples are extracted from open source projects. There are a few different signatures for the getconnection method. See specify properties for an example of how to specify a property list. This will cause issues is multithreaded environments. To connect your java application to a database and to open a database session, you can use thejava. Once the jdbc driver class is loaded, you are ready to connect to a sql server by using the drivermanager. Java database connectivity jdbc is an application programming interface api for the. For a list of the systemdefined device driver properties, see device driver properties.
Connecting using the drivermanager and a database url. Properties can be passed to jtds in one of three ways. Aug 09, 2007 hi avi, the cpu july patch 07 has some security updates on the database server. The unified device property model uses property keys to represent these properties windows server 2003, windows xp, and windows 2000 also support most of these. Return the connection properties to be passed to the drivermanager, if any. See properties for the ibm data server driver for jdbc and sqlj for the properties that you can specify. Driver size is a fun factoid to know, and i guess its something you can throw out there to try and win a dumb audio argument. The standard way to obtain a connection object is to call the method drivermanager. I think it was a good idea to think about event loop and so, but from now on i just learnt one. When getconnection is called the drivermanager will attempt to locate a suitable driver from amongst those loaded at initialization and those loaded explicitly using the same classloader as the current applet or application. A second parameter to the getconnection method, property, is the property list.
As part of its initialization, the drivermanager class will attempt to load the driver classes. I work on a codebase where much of the logic has been ground to a fine powder by the millstones of mockdriven refactoring. The following line of code illustrates it generally. The standard method to establish a connection to a database is through the method call drivermanager. To the connect properties object and see if that works. The device driver properties are listed by the property key identifiers that you use to access the properties on windows vista and later versions. 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. If i use step into it seems that the url is being parsed ok for the most part. When getconnection is called the drivermanager will attempt to locate a suitable driver from amongst those loaded at initialization and those loaded explicitly. Removes the specified driver from the drivermanager s list of registered drivers. Properties that contains a set of driver properties for the connection. After the driver has been registered with the drivermanager, you can obtain a connection instance that is connected to a particular database by calling drivermanager. Accessing device driver properties windows drivers. A jdbc database connection url uniform resource locator provides a way of identifying a database.
As there are serveral possible reasons for the no suitable driver exception to be thrown as far as i can see there is a test for the class loader in drivermanager. The mysql jdbc driver is already shipped with netbeans. Jul 29, 2003 thanks for the url, i am looking into that but also i will like to say that, i have been using the same url in my other programs, the only difference is that the driver was in the class path and the connection strings worked. It just serves as simple replacement for a fullblown connection pool, implementing the same standard interface. Additionally, the driver manager enumerates all available drivers, and is used to register and deregister drivers. This document contains answers to the most frequently asked questions about oracles jdbc drivers. The driver manager is used as a connection factory for creating jdbc. As per my experience good interviewers hardly plan to ask any particular question during your interview, normally questions start with some basic concept of the subject and later they continue based on. If it does then there is a problem in the driver code. Using the mit kerberos ticket manager to get tickets. This example shows how you can obtain a connection instance from the drivermanager. A java application using the jdbc api establishes a connection to a database by obtaining a connection object.
Ifi want to user driver mananger, then not within a swing framework otherwise execution from windows would be undefined. The line of code attempts to connect to the local database as user cujo with password newtiger no matter who is running the application. The following is an example of using the jdbc driver manager to connect to advantage database server while passing the. Connecting to a data source using the drivermanager interface. The drivermanagerconnectionsource is an implementation of connectionsource that obtains the connection in the traditional jdbc manner based on the connection url. If the mysql jdbc driver is not present in the available libraries list, click the import button. Drivermanager manages the set of java database connectivity jdbc. Tries to establish a connection with the data source that this sqlserverdatasource object represents by using the given user name and password. This method supplies a connection object that is connected to the database.