151 lines
8.3 KiB
HTML
151 lines
8.3 KiB
HTML
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<meta name="DC.Title" content="Registering the JDBC driver" />
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<title>Registering the JDBC driver</title>
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<body id="jdbcdrvr"><a name="jdbcdrvr"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Registering the JDBC driver</h1>
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<div><p></p>
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<div class="section"><p>Before using JDBC to access data in a server database file, you
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need to register the <a href="javadoc/com/ibm/as400/access/AS400JDBCDriver.html">JDBC driver</a> for the IBM<sup>®</sup> Toolbox for Java™ licensed program with the DriverManager.
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You can register the driver either by using a Java system property or by having the Java program
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register the driver:</p>
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<ul><li>Register by using a system property <p>Each virtual machine has its own
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method of setting system properties. For example, the Java command
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from the JDK uses the -D option to set system properties. To set the driver
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using system properties, specify the following:</p>
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<pre> "-Djdbc.drivers=com.ibm.as400.access.AS400JDBCDriver"</pre>
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</li>
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<li>Register by using the Java program <p>To load the IBM Toolbox for Java JDBC
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driver, add the following to the Java program before the first JDBC call:</p>
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<pre> Class.forName("com.ibm.as400.access.AS400JDBCDriver");</pre>
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<p>The IBM Toolbox
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for Java JDBC
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driver registers itself when it is loaded, which is the preferred way to register
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the driver. You can also explicitly register the IBM Toolbox JDBC driver by using the following:</p>
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<pre> java.sql.DriverManager.registerDriver (new com.ibm.as400.access.AS400JDBCDriver ());</pre>
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</li>
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</ul>
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<p>The IBM Toolbox
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for Java JDBC
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driver does not require an AS400 object as an input parameter like the other IBM Toolbox
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for Java classes
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that get data from a server. An AS400 object is used internally, however,
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to manage default user and password caching. When a connection is first made
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to the server, the user may be prompted for user ID and password. The user
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has the option to save the user ID as the default user ID and add the password
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to the password cache. As in the other IBM Toolbox for Java functions, if the user ID and password
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are supplied by the Java program, the default user is not set
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and the password is not cached. See <a href="mngcon.htm#mngcon">Managing connections</a> for
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information on managing connections.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Using the JDBC driver to connect to a database on the server</h4><p>You
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can use the DriverManager.getConnection() method to connect to the server
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database. DriverManager.getConnection() takes a uniform resource locator
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(URL) string as an argument. The JDBC driver manager attempts to locate a
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driver that can connect to the database that is represented by the URL. When
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using the IBM Toolbox
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for Java driver,
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use the following syntax for the URL:</p>
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<pre> "jdbc:as400://systemName/defaultSchema;listOfProperties"</pre>
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<div class="note"><span class="notetitle">Note:</span> Either
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systemName or defaultSchema can be omitted from the URL.</div>
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<p>To use
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Kerberos tickets, set only the system name (and not the password) on your
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JDBC URL object. The user identity is retrieved through the Java Generic
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Security Services (JGSS) framework, so you also do not need to specify a
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user on your JDBC URL. You can set only one means of authentication in an
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AS400JDBCConnection object at a time. Setting the password clears any Kerberos
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ticket or profile token. For more information, see <a href="as400obj.htm#as400obj">AS400 class</a> and
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<a href="http://java.sun.com/j2se/1.4/docs/guide/security/index.html" target="_blank">J2SDK, v1.4 Security Documentation</a> <img src="www.gif" alt="Link outside information center" />.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Examples: Using the JDBC driver to connect to a server</h4><p><strong>Example:
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Using a URL in which a system name is not specified</strong></p>
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<p>This example
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results in the user being prompted to type in the name of the system to which
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he or she wants to connect.</p>
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<pre> // Connect to unnamed system.
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// User receives prompt to type system name.
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Connection c = DriverManager.getConnection("jdbc:as400:");</pre>
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<p><strong>Example:
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Connecting to the server database; no default schema or properties specified</strong></p>
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<pre> // Connect to system 'mySystem'. No
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// default schema or properties are
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// specified.
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Connection c = DriverManager.getConnection("jdbc:as400://mySystem");</pre>
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<p><strong>Example:
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Connecting to the server database; default schema specified</strong></p>
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<pre> // Connect to system 'mySys2'. The
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// default schema 'myschema' is
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// specified.
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Connection c2 = DriverManager.getConnection("jdbc:as400://mySys2/mySchema");</pre>
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<p><strong>Example:
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Connecting to the server database and using java.util.Properties to specify
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properties</strong></p>
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<p>The Java program can specify a set of JDBC
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properties either by using the java.util.Properties interface or by specifying
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the properties as part of the URL. See <a href="jdbcproperties.htm#jdbcproperties">IBM Toolbox for Java JDBC properties</a> for
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a list of supported properties.</p>
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<p>For example, to specify properties using
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the Properties interface, use the following code as an example:</p>
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<pre> // Create a properties object.
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Properties p = new Properties();
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// Set the properties for the
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// connection.
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p.put("naming", "sql");
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p.put("errors", "full");
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// Connect using the properties
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// object.
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Connection c = DriverManager.getConnection("jdbc:as400://mySystem",p);</pre>
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<p><strong>Example:
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Connecting to the server database and using a uniform resource locator (URL)
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to specify properties</strong></p>
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<pre> // Connect using properties. The
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// properties are set on the URL
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// instead of through a properties
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// object.
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Connection c = DriverManager.getConnection(
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"jdbc:as400://mySystem;naming=sql;errors=full");</pre>
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<p><strong>Example:
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Connecting to the server database and specifying user ID and password</strong></p>
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<pre> // Connect using properties on the
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// URL and specifying a user ID and
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// password
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Connection c = DriverManager.getConnection(
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"jdbc:as400://mySystem;naming=sql;errors=full",
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"auser",
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"apassword");</pre>
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<p><strong>Example: Disconnecting
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from the database</strong>To disconnect from the server, use the close() method
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on the Connecting object. Use the following statement to close the connection
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created in the previous example:</p>
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<pre> c.close();</pre>
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</div>
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</div>
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</body>
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</html> |