169 lines
7.2 KiB
HTML
169 lines
7.2 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<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))' />
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Example: Using JDBC classes to create and populate a table (part 1 of 2)" />
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<meta name="abstract" content="" />
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<meta name="description" content="" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="jdbcex1" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Example: Using JDBC classes to create and populate a table (part 1
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of 2)</title>
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</head>
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<body id="jdbcex1"><a name="jdbcex1"><!-- --></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">Example: Using JDBC classes to create and populate a table (part 1
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of 2)</h1>
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<div><p></p>
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<div class="section"><p>[ <a href="jdbcex2.htm#jdbcex2">Next part</a> ]</p>
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<p>Use
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the following as an example for your program.</p>
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<div class="note"><span class="notetitle">Note:</span> Read the <a href="codedisclaimer.htm#codedisclaimer">Code
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example disclaimer</a> for important legal information.</div>
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<pre>//////////////////////////////////////////////////////////////////////////////////
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//
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// JDBCPopulate example. This program uses the IBM Toolbox for Java JDBC driver
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// to create and populate a table.
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//
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// Command syntax:
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// JDBCPopulate system collectionName tableName
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//
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// For example,
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// JDBCPopulate MySystem MyLibrary MyTable
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//
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// This source is an example of IBM Toolbox for Java JDBC driver.
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//
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//////////////////////////////////////////////////////////////////////////////////
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import java.sql.*;
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public class JDBCPopulate
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{
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private static final String words[]
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= { "One", "Two", "Three", "Four", "Five",
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"Six", "Seven", "Eight", "Nine", "Ten",
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"Eleven", "Twelve", "Thirteen", "Fourteen", "Fifteen",
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"Sixteen", "Seventeen","Eighteen", "Nineteen", "Twenty" };
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public static void main (String[] parameters)
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{
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if (parameters.length != 3) {
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System.out.println("");
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System.out.println("Usage:");
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System.out.println("");
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System.out.println(" JDBCPopulate system collectionName tableName");
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System.out.println("");
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System.out.println("");
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System.out.println("For example:");
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System.out.println("");
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System.out.println("");
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System.out.println(" JDBCPopulate MySystem MyLibrary MyTable");
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System.out.println("");
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return;
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}
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String system = parameters[0];
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String collectionName = parameters[1];
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String tableName = parameters[2];
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Connection connection = null;
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try {
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DriverManager.registerDriver(new com.ibm.as400.access.AS400JDBCDriver()); <a href="#jdbcex1__dup0023">Note 1 </a>
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connection = DriverManager.getConnection ("jdbc:as400://"
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+ system + "/" + collectionName); <a href="#jdbcex1__dup0024">Note 2 </a>
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try {
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Statement dropTable = connection.createStatement ();
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dropTable.executeUpdate ("DROP TABLE " + tableName); <a href="#jdbcex1__dup0025">Note 3 </a>
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}
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catch (SQLException e) {
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}
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Statement createTable = connection.createStatement ();
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createTable.executeUpdate ("CREATE TABLE " + tableName
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+ " (I INTEGER, WORD VARCHAR(20), SQUARE INTEGER, "
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+ " SQUAREROOT DOUBLE)"); <a href="#jdbcex1__dup0026">Note 4 </a>
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PreparedStatement insert = connection.prepareStatement ("INSERT INTO "
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+ tableName + " (I, WORD, SQUARE, SQUAREROOT) "
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+ " VALUES (?, ?, ?, ?)"); <a href="#jdbcex1__dup0027">Note 5 </a>
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for (int i = 1; i <= words.length; ++i) {
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insert.setInt (1, i);
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insert.setString (2, words[i-1]);
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insert.setInt (3, i*i);
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insert.setDouble (4, Math.sqrt(i));
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insert.executeUpdate (); <a href="#jdbcex1__dup0028">Note 6 </a>
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}
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System.out.println ("Table " + collectionName + "." + tableName
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+ " has been populated.");
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}
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catch (Exception e) {
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System.out.println ();
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System.out.println ("ERROR: " + e.getMessage());
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}
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finally {
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try {
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if (connection != null)
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connection.close (); <a href="#jdbcex1__dup0029">Note 7 </a>
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}
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catch (SQLException e) {
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// Ignore.
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}
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}
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System.exit (0);
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}
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}</pre>
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</div>
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<div class="section"><ol><li id="jdbcex1__dup0023"><a name="jdbcex1__dup0023"><!-- --></a>This line loads the IBM<sup>®</sup> Toolbox for Java™ JDBC driver. A JDBC driver is necessary
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to mediate between JDBC and the database you are working with.</li>
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<li id="jdbcex1__dup0024"><a name="jdbcex1__dup0024"><!-- --></a>This statement connects to the database. A prompt will appear
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for the user ID and password. A default schema is provided so that you will
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not need to qualify the table name in SQL statements.</li>
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<li id="jdbcex1__dup0025"><a name="jdbcex1__dup0025"><!-- --></a>These lines delete the table if it already exists.</li>
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<li id="jdbcex1__dup0026"><a name="jdbcex1__dup0026"><!-- --></a>These lines create the table.</li>
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<li id="jdbcex1__dup0027"><a name="jdbcex1__dup0027"><!-- --></a>This line prepares a statement that will insert rows into
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the table. Because you will be executing this statement several times, you
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should use a PreparedStatement and parameter markers.</li>
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<li id="jdbcex1__dup0028"><a name="jdbcex1__dup0028"><!-- --></a>This block of code populates the table for you; every time
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the loop is executed, it inserts a row into the table.</li>
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<li id="jdbcex1__dup0029"><a name="jdbcex1__dup0029"><!-- --></a>Now that the table has been created and filled in, this statement
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closes the connection to the database.</li>
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</ol>
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<p>[ <a href="jdbcex2.htm#jdbcex2">Next part</a> ]</p>
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</div>
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</div>
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</body>
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</html>
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