Java tutorial
/* * Copyright (c) 1995, 2011, Oracle and/or its affiliates. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * - Neither the name of Oracle or the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package com.oracle.tutorial.jdbc; import java.io.IOException; import java.io.StringReader; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.SQLXML; import java.sql.Statement; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.ParserConfigurationException; import javax.xml.transform.TransformerConfigurationException; import javax.xml.transform.TransformerException; import javax.xml.transform.dom.DOMResult; import javax.xml.xpath.XPath; import javax.xml.xpath.XPathConstants; import javax.xml.xpath.XPathExpressionException; import javax.xml.xpath.XPathFactory; import org.w3c.dom.Document; import org.w3c.dom.Node; import org.xml.sax.InputSource; import org.xml.sax.SAXException; public class RSSFeedsTable { private String dbName; private Connection con; private String dbms; public RSSFeedsTable(Connection connArg, String dbNameArg, String dbmsArg) { super(); this.con = connArg; this.dbName = dbNameArg; this.dbms = dbmsArg; } public void createTable() throws SQLException { Statement stmt = null; try { if (this.dbms.equals("derby")) { String createString = "create table RSS_FEEDS (RSS_NAME varchar(32) NOT NULL," + " RSS_FEED_XML xml NOT NULL, PRIMARY KEY (RSS_NAME))"; stmt = con.createStatement(); stmt.executeUpdate(createString); } else if (this.dbms.equals("mysql")) { String createString = "create table RSS_FEEDS (RSS_NAME varchar(32) NOT NULL," + " RSS_FEED_XML longtext NOT NULL, PRIMARY KEY (RSS_NAME))"; stmt = con.createStatement(); stmt.executeUpdate(createString); } } catch (SQLException e) { JDBCTutorialUtilities.printSQLException(e); } finally { if (stmt != null) { stmt.close(); } } } public void dropTable() throws SQLException { Statement stmt = null; try { stmt = con.createStatement(); if (this.dbms.equals("mysql")) { stmt.executeUpdate("DROP TABLE IF EXISTS RSS_FEEDS"); } else if (this.dbms.equals("derby")) { stmt.executeUpdate("DROP TABLE RSS_FEEDS"); } } catch (SQLException e) { JDBCTutorialUtilities.printSQLException(e); } finally { stmt.close(); } } public void addRSSFeed(String fileName) throws ParserConfigurationException, SAXException, IOException, XPathExpressionException, TransformerConfigurationException, TransformerException, SQLException { // Parse the document and retrieve the name of the RSS feed String titleString = null; javax.xml.parsers.DocumentBuilderFactory factory = javax.xml.parsers.DocumentBuilderFactory.newInstance(); factory.setNamespaceAware(true); DocumentBuilder builder = factory.newDocumentBuilder(); Document doc = builder.parse(fileName); XPathFactory xPathfactory = XPathFactory.newInstance(); XPath xPath = xPathfactory.newXPath(); Node titleElement = (Node) xPath.evaluate("/rss/channel/title[1]", doc, XPathConstants.NODE); if (titleElement == null) { System.out.println("Unable to retrieve title element"); return; } else { titleString = titleElement.getTextContent().trim().toLowerCase().replaceAll("\\s+", "_"); System.out.println("title element: [" + titleString + "]"); } System.out.println(JDBCTutorialUtilities.convertDocumentToString(doc)); PreparedStatement insertRow = null; SQLXML rssData = null; System.out.println("Current DBMS: " + this.dbms); try { if (this.dbms.equals("mysql")) { // For databases that support the SQLXML data type, this creates a // SQLXML object from org.w3c.dom.Document. System.out.println("Adding XML file " + fileName); String insertRowQuery = "insert into RSS_FEEDS (RSS_NAME, RSS_FEED_XML) values" + " (?, ?)"; insertRow = con.prepareStatement(insertRowQuery); insertRow.setString(1, titleString); System.out.println("Creating SQLXML object with MySQL"); rssData = con.createSQLXML(); System.out.println("Creating DOMResult object"); DOMResult dom = (DOMResult) rssData.setResult(DOMResult.class); dom.setNode(doc); insertRow.setSQLXML(2, rssData); System.out.println("Running executeUpdate()"); insertRow.executeUpdate(); } else if (this.dbms.equals("derby")) { System.out.println("Adding XML file " + fileName); String insertRowQuery = "insert into RSS_FEEDS (RSS_NAME, RSS_FEED_XML) values" + " (?, xmlparse(document cast (? as clob) preserve whitespace))"; insertRow = con.prepareStatement(insertRowQuery); insertRow.setString(1, titleString); String convertedDoc = JDBCTutorialUtilities.convertDocumentToString(doc); insertRow.setClob(2, new StringReader(convertedDoc)); System.out.println("Running executeUpdate()"); insertRow.executeUpdate(); } } catch (SQLException e) { JDBCTutorialUtilities.printSQLException(e); } catch (Exception ex) { System.out.println("Another exception caught:"); ex.printStackTrace(); } finally { if (insertRow != null) { insertRow.close(); } } } public void viewTable(Connection con) throws SQLException, ParserConfigurationException, SAXException, IOException, TransformerConfigurationException, TransformerException { Statement stmt = null; try { stmt = con.createStatement(); if (this.dbms.equals("derby")) { String query = "select RSS_NAME, xmlserialize (RSS_FEED_XML as clob) from RSS_FEEDS"; ResultSet rs = stmt.executeQuery(query); while (rs.next()) { String rssName = rs.getString(1); String rssFeedXML = rs.getString(2); javax.xml.parsers.DocumentBuilderFactory factory = javax.xml.parsers.DocumentBuilderFactory .newInstance(); factory.setNamespaceAware(true); DocumentBuilder builder = factory.newDocumentBuilder(); Document doc = builder.parse(new InputSource(new StringReader(rssFeedXML))); System.out.println("RSS identifier: " + rssName); System.out.println(JDBCTutorialUtilities.convertDocumentToString(doc)); } } else if (this.dbms.equals("mysql")) { String query = "select RSS_NAME, RSS_FEED_XML from RSS_FEEDS"; ResultSet rs = stmt.executeQuery(query); while (rs.next()) { String rssName = rs.getString(1); SQLXML rssFeedXML = rs.getSQLXML(2); javax.xml.parsers.DocumentBuilderFactory factory = javax.xml.parsers.DocumentBuilderFactory .newInstance(); factory.setNamespaceAware(true); DocumentBuilder builder = factory.newDocumentBuilder(); Document doc = builder.parse(rssFeedXML.getBinaryStream()); System.out.println("RSS identifier: " + rssName); System.out.println(JDBCTutorialUtilities.convertDocumentToString(doc)); } } } catch (SQLException e) { JDBCTutorialUtilities.printSQLException(e); } finally { if (stmt != null) { stmt.close(); } } } public static void main(String[] args) { JDBCTutorialUtilities myJDBCTutorialUtilities; Connection myConnection = null; if (args[0] == null) { System.err.println("Properties file not specified at command line"); return; } else { try { myJDBCTutorialUtilities = new JDBCTutorialUtilities(args[0]); } catch (Exception e) { System.err.println("Problem reading properties file " + args[0]); e.printStackTrace(); return; } } try { myConnection = myJDBCTutorialUtilities.getConnection(); RSSFeedsTable myRSSFeedsTable = new RSSFeedsTable(myConnection, myJDBCTutorialUtilities.dbName, myJDBCTutorialUtilities.dbms); myRSSFeedsTable.addRSSFeed("xml/rss-coffee-industry-news.xml"); myRSSFeedsTable.addRSSFeed("xml/rss-the-coffee-break-blog.xml"); myRSSFeedsTable.viewTable(myConnection); } catch (Exception e) { e.printStackTrace(); } finally { JDBCTutorialUtilities.closeConnection(myConnection); } } }