99 lines
7.2 KiB
HTML
99 lines
7.2 KiB
HTML
|
<?xml version="1.0" encoding="UTF-8"?>
|
||
|
|
<!DOCTYPE html
|
||
|
|
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
|
|
<html lang="en-us" xml:lang="en-us">
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||
|
|
<meta name="security" content="public" />
|
||
|
|
<meta name="Robots" content="index,follow" />
|
||
|
|
<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
|
||
|
|
<meta name="DC.Type" content="concept" />
|
||
|
|
<meta name="DC.Title" content="Connections" />
|
||
|
|
<meta name="abstract" content="The Connection object represents a connection to a data source in Java Database Connectivity (JDBC). It is through Connection objects that Statement objects are created for processing SQL statements against the database. An application program can have multiple connections at one time. These Connection objects can all connect to the same database or connect to different databases." />
|
||
|
|
<meta name="description" content="The Connection object represents a connection to a data source in Java Database Connectivity (JDBC). It is through Connection objects that Statement objects are created for processing SQL statements against the database. An application program can have multiple connections at one time. These Connection objects can all connect to the same database or connect to different databases." />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="jdbc.htm" />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="db2drivr.htm" />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="conprop.htm" />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="udbdatsr.htm" />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="dasrprop.htm" />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="otherdts.htm" />
|
||
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 2006" />
|
||
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2006" />
|
||
|
|
<meta name="DC.Format" content="XHTML" />
|
||
|
|
<meta name="DC.Identifier" content="connects" />
|
||
|
|
<meta name="DC.Language" content="en-us" />
|
||
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
||
|
|
<!-- US Government Users Restricted Rights -->
|
||
|
|
<!-- Use, duplication or disclosure restricted by -->
|
||
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
||
|
|
<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
|
||
|
|
<link rel="stylesheet" type="text/css" href="./ic.css" />
|
||
|
|
<title>Connections</title>
|
||
|
|
</head>
|
||
|
|
<body id="connects"><a name="connects"><!-- --></a>
|
||
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
||
|
|
<h1 class="topictitle1">Connections</h1>
|
||
|
|
<div><p>The Connection object represents a connection to a data source
|
||
|
|
in Java™ Database
|
||
|
|
Connectivity (JDBC). It is through Connection objects that Statement objects
|
||
|
|
are created for processing SQL statements against the database. An application
|
||
|
|
program can have multiple connections at one time. These Connection objects
|
||
|
|
can all connect to the same database or connect to different databases.</p>
|
||
|
|
<p>Obtaining a connection in JDBC can be accomplished in two ways:</p>
|
||
|
|
<ul><li>Through the DriverManager class.</li>
|
||
|
|
<li>By using DataSources.</li>
|
||
|
|
</ul>
|
||
|
|
<p> Using DataSources to obtain a connection is preferred because it enhances
|
||
|
|
application portability and maintainability. It also allows an application
|
||
|
|
to transparently use connection and statement pooling, and distributed transactions.
|
||
|
|
</p>
|
||
|
|
<p>For details on obtaining connections, see the following sections:</p>
|
||
|
|
<blockquote> <p><strong><a href="db2drivr.htm">DriverManager</a></strong> The DriverManager
|
||
|
|
is a static class that manages the set of available JDBC drivers for an application
|
||
|
|
to use.</p>
|
||
|
|
<p><strong><a href="conprop.htm">Connection properties</a></strong>
|
||
|
|
The table lists valid JDBC driver connection properties, their values, and
|
||
|
|
their descriptions.</p>
|
||
|
|
<p><strong><a href="udbdatsr.htm">Use DataSources
|
||
|
|
with UDBDataSource</a></strong> You can deploy a DataSource with the UDBDataSource
|
||
|
|
class by setting it up to have specific properties and then binding it into
|
||
|
|
some directory service through the use of the Java Naming and Directory Interface (JNDI).</p>
|
||
|
|
<p><strong><a href="dasrprop.htm">DataSource properties</a></strong> The table lists valid
|
||
|
|
DataSource properties, their values, and their descriptions.</p>
|
||
|
|
<p><strong><a href="otherdts.htm">Other DataSource implementations</a></strong> There are
|
||
|
|
other implementations of the DataSource interface provided with the native
|
||
|
|
JDBC driver. They exist only to serve as a bridge until the UDBDataSource
|
||
|
|
and its related functions are adopted.</p>
|
||
|
|
</blockquote>
|
||
|
|
<p>Once a connection is obtained, it can be used to accomplish the following
|
||
|
|
JDBC tasks:</p>
|
||
|
|
<ul><li><a href="statemnt.htm">Create various types of Statement objects</a> for
|
||
|
|
interacting with the database.</li>
|
||
|
|
<li>Control <a href="transactions.htm">transactions</a> against the
|
||
|
|
database.</li>
|
||
|
|
<li><a href="datameta.htm">Retrieve metadata</a> about the database.</li>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
<div>
|
||
|
|
<ul class="ullinks">
|
||
|
|
<li class="ulchildlink"><strong><a href="db2drivr.htm">DriverManager</a></strong><br />
|
||
|
|
DriverManager is a static class in the Java 2 Software Development Kit (J2SDK).
|
||
|
|
DriverManager manages the set of Java Database Connectivity (JDBC) drivers
|
||
|
|
that are available for an application to use. </li>
|
||
|
|
<li class="ulchildlink"><strong><a href="conprop.htm">Connection properties</a></strong><br />
|
||
|
|
This table contains valid JDBC driver connection properties, their values, and their descriptions.</li>
|
||
|
|
<li class="ulchildlink"><strong><a href="udbdatsr.htm">Use DataSources with UDBDataSource</a></strong><br />
|
||
|
|
DataSource interfaces were designed to allow additional flexibility
|
||
|
|
in using Java Database Connectivity (JDBC) drivers.</li>
|
||
|
|
<li class="ulchildlink"><strong><a href="dasrprop.htm">DataSource properties</a></strong><br />
|
||
|
|
This table contains valid data source properties, their values, and their descriptions.</li>
|
||
|
|
<li class="ulchildlink"><strong><a href="otherdts.htm">Other DataSource implementations</a></strong><br />
|
||
|
|
There are two implementations of the DataSource interface that are included with the native JDBC driver. These DataSource implementations should be considered deprecated. While you can still use them, they are not enhanced with future improvements; for example, robust connection and statement pooling are not added to these implementations. These implementations exist until you adopt the UDBDataSource interface and its related functions.</li>
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
<div class="familylinks">
|
||
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="jdbc.htm" title="The IBM Developer Kit for Java JDBC driver, also known as the "native" driver, provides programmatic access to iSeries database files. Using the Java Database Connectivity (JDBC) API, applications written in the Java language can access JDBC database functions with embedded Structured Query Language (SQL), run SQL statements, retrieve results, and propagate changes back to the database. The JDBC API can also be used to interact with multiple data sources in a distributed, heterogeneous environment.">Access your iSeries database with the IBM Developer Kit for Java JDBC driver</a></div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|