how to add qr code in crystal report INTRODUCTION TO JDBC in Font

Printing USS Code 39 in Font INTRODUCTION TO JDBC

CHAPTER 3 INTRODUCTION TO JDBC
Code 39 Generation In None
Using Barcode generation for Font Control to generate, create Code 3/9 image in Font applications.
www.OnBarcode.com
Generating Code 128 In None
Using Barcode creation for Font Control to generate, create Code 128 Code Set A image in Font applications.
www.OnBarcode.com
Introducing JDBCUtil
Painting PDF417 In None
Using Barcode printer for Font Control to generate, create PDF-417 2d barcode image in Font applications.
www.OnBarcode.com
UCC - 12 Generator In None
Using Barcode drawer for Font Control to generate, create UPC-A Supplement 2 image in Font applications.
www.OnBarcode.com
JDBCUtil is a class I wrote that contains useful utility methods that you will add to as and when you learn different concepts in this book. In this chapter, you learned how to obtain a connection to a database and release resources associated with Connection, Statement, and ResultSet objects. These are ideal candidates for being incorporated in the JDBCUtil class for use in code written in later chapters. I have put the JDBCUtil class in the package book.util. You can download this class from the Downloads area of the Apress website (http://www.apress.com). Let s look at the method getConnection() in this class, which takes as parameters a username, password, and database name (SID or service name): public static Connection getConnection( String username, String password, String dbName) throws SQLException { OracleDataSource ods = null; Connection connection = null; ods = new OracleDataSource(); // set the properties that define the connection ods.setDriverType ( "thin" ); // type of driver ods.setServerName ( "rmenon-lap" ); // database server name ods.setNetworkProtocol("tcp"); // tcp is the default anyway ods.setDatabaseName(dbName); // Oracle SID ods.setPortNumber(1521); // my 10g listener port number ods.setUser(username); // username ods.setPassword(password); // password System.out.println( "URL:" + ods.getURL());System.out.flush(); connection = ods.getConnection(); connection.setAutoCommit( false ); return connection; } The method should be self-explanatory. The only thing that I have not explained is the invocation of setAutoCommit(), which is explained in the next chapter in the section The Autocommit Feature and Turning It Off. The various overloaded versions of the following close() methods simply invoke the close() method on a ResultSet, Statement, or Connection object and are self-explanatory: public static void close ( ResultSet resultSet, Statement statement, Connection connection ) { try { if( resultSet != null ) resultSet.close(); if( statement != null ) statement.close(); if( connection != null )
Generate GTIN - 128 In None
Using Barcode creator for Font Control to generate, create GS1-128 image in Font applications.
www.OnBarcode.com
Create DataMatrix In None
Using Barcode encoder for Font Control to generate, create Data Matrix ECC200 image in Font applications.
www.OnBarcode.com
CHAPTER 3 INTRODUCTION TO JDBC
UPC - 13 Generation In None
Using Barcode creation for Font Control to generate, create GTIN - 13 image in Font applications.
www.OnBarcode.com
Print MSI Plessey In None
Using Barcode generator for Font Control to generate, create MSI Plessey image in Font applications.
www.OnBarcode.com
connection.close(); } catch ( SQLException ignored ) { } } public static void close ( ResultSet resultSet, Statement statement ) { try { if( resultSet != null ) resultSet.close(); if( statement != null ) statement.close(); } catch ( SQLException ignored ) { } } public static void close ( ResultSet resultSet ) { try { if( resultSet != null ) resultSet.close(); } catch ( SQLException ignored ) { } } public static void close ( Statement statement ) { try { if( statement != null ) statement.close(); } catch ( SQLException ignored ) { } } public static void close ( Connection connection ) { try { if( connection != null ) connection.close(); }
Recognizing Code39 In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Code-39 Creator In Visual Studio .NET
Using Barcode generator for ASP.NET Control to generate, create Code 39 Full ASCII image in ASP.NET applications.
www.OnBarcode.com
CHAPTER 3 INTRODUCTION TO JDBC
Code 128 Creator In Visual C#
Using Barcode creator for Visual Studio .NET Control to generate, create Code 128 Code Set A image in .NET framework applications.
www.OnBarcode.com
Code 128 Code Set A Creation In .NET Framework
Using Barcode generator for .NET Control to generate, create Code 128 Code Set A image in .NET applications.
www.OnBarcode.com
catch ( SQLException ignored ) { } } Finally, the method printException() in the JDBCUtil class prints the SQLException error message along with the stack trace: public static void printException ( Exception e ) { System.out.println ("Exception caught! Exiting .." ); System.out.println ("error message: " + e.getMessage() ); e.printStackTrace(); }
Encoding QR In VS .NET
Using Barcode drawer for VS .NET Control to generate, create QR Code image in VS .NET applications.
www.OnBarcode.com
Print Code 39 Full ASCII In Visual Studio .NET
Using Barcode creator for ASP.NET Control to generate, create Code39 image in ASP.NET applications.
www.OnBarcode.com
Summary
Encoding Code 3/9 In Java
Using Barcode maker for BIRT reports Control to generate, create Code 39 image in Eclipse BIRT applications.
www.OnBarcode.com
Barcode Recognizer In .NET
Using Barcode scanner for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
In this chapter, you were introduced to the JDBC API. You looked at different types of JDBC drivers and how to choose the one appropriate for your software development requirements. You discovered how to set up an environment for using the JDBC thin and OCI drivers, and you examined the various options of establishing a connection to the Oracle database and why you should consider using DataSource instead of DriverManager to establish such a connection. Finally, you wrote and analyzed your first JDBC program, which executes a query against Oracle database and prints out the query results. In the next chapter, you will look at the JDBC API associated with database transactions.
Printing QR Code 2d Barcode In Java
Using Barcode drawer for BIRT reports Control to generate, create QR Code image in Eclipse BIRT applications.
www.OnBarcode.com
Code 128B Encoder In Java
Using Barcode creator for Java Control to generate, create Code128 image in Java applications.
www.OnBarcode.com
CHAPTER
PDF 417 Creation In .NET
Using Barcode creator for Visual Studio .NET Control to generate, create PDF-417 2d barcode image in VS .NET applications.
www.OnBarcode.com
Data Matrix ECC200 Generator In Objective-C
Using Barcode creation for iPad Control to generate, create Data Matrix 2d barcode image in iPad applications.
www.OnBarcode.com
Transactions
n this chapter, you ll take a brief look at transactions in the context of JDBC. You ll see how to commit and roll back a transaction in JDBC, and you ll learn what transaction isolation levels are and which ones are supported by Oracle. In addition, I ll explain why it s important to turn off the autocommit feature in JDBC in production code. Finally, you ll examine transaction savepoints, a feature exposed to Java programs in JDBC 3.0.
Copyright © OnBarcode.com . All rights reserved.