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How to write jdbc connections

How we have to write jdbc connections

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Http://www.jdbc-tutorial.com/

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how to write jdbc connections - welcome_title_image.gif Java JDBC Tutorial Java JDBC Tutorial
The JDBC ( Java Database Connectivity) API defines interfaces and classes for writing database applications in Java by making database connections. Using JDBC you can send SQL, PL/SQL statements to almost any relational database. JDBC is a Java API for executing SQL statements and supports basic SQL functionality. It provides RDBMS access by allowing you to embed SQL inside Java code. Because Java can run on a thin client, applets embedded in Web pages can contain downloadable JDBC code to enable remote database access. You will learn how to create a table, insert values into it, query the table, retrieve results, and update the table with the help of a JDBC Program example.


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Although JDBC was designed specifically to provide a Java interface to relational databases, you may find that you need to write Java code to access non-relational databases as well.
JDBC Architecture jdbc.jpg Java application calls the JDBC library. JDBC loads a driver which talks to the database. We can change database engines without changing database code.
JDBC Basics - Java Database Connectivity Steps Before you can create a java jdbc connection to the database, you must first import the
java.sql package.
import java.sql.*; The star ( * ) indicates that all of the classes in the package java.sql are to be imported.
1. Loading a database driver,
In this step of the jdbc connection process, we load the driver class by calling Class.forName() with the Driver class name as an argument. Once loaded, the Driver class creates an instance of itself. A client can connect to Database Server through JDBC Driver. Since most of the Database servers support ODBC driver therefore JDBC-ODBC Bridge driver is commonly used.
The return type of the Class.forName (String ClassName) method is “Class”. Class is a class in
java.lang package.
try { Class.forName(”sun.jdbc.odbc.JdbcOdbcDriver”); //Or any other driver } catch(Exception x){ System.out.println( “Unable to load the driver class!” ); } 2. Creating a oracle jdbc Connection

The JDBC DriverManager class defines objects which can connect Java applications to a JDBC driver. DriverManager is considered the backbone of JDBC architecture. DriverManager class manages the JDBC drivers that are installed on the system. Its getConnection() method is used to establish a connection to a database. It uses a username, password, and a jdbc url to establish a connection to the database and returns a connection object. A jdbc Connection represents a session/connection with a specific database. Within the context of a Connection, SQL, PL/SQL statements are executed and results are returned. An application can have one or more connections with a single database, or it can have many connections with different databases. A Connection object provides metadata i.e. information about the database, tables, and fields. It also contains methods to deal with transactions.
JDBC URL Syntax:: jdbc: <subprotocol>: <subname> JDBC URL Example:: jdbc: <subprotocol>: <subname>•Each driver

Posted on Feb 08, 2009

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I have to make minor project on java and i know core java and jdbc odbc connectivity will u please help me


It would probably be wise to post this on a Java forum (like this one, this one, or this one), as they will be able to help you better.

Alternatively, try Stack Overflow.

Feb 19, 2010 | Microsoft Windows XP Professional

1 Answer

How can i connect the data base during my project


That seems fine.

I cant assume your level of confidence in programming, however, following are some simple steps you can follow to achieve (for complex implementations, much more time and details will be needed, i can help u with them as well)

1. Create a database in Access ( i assume u r using Access 2003)
2. Create a System DSN (if aren't clear, how to create then goto administrative tools under control panel and you'll find Data Sources (ODBC), here u need to create System level DSN for Access driver (may be Jet 4.0+)
3. In java, you need to import java core libraries for sql (javax.sql package specially)
4. you are almost done, just google for database code in java, simple code will be around 5-10 lines (just for your reference, search with these keywords, ClassName(""), jdbc:odbc:YourDSN)
5. Open a connection using Connection object
6. Fetch the records (select query) using Recordset object
7. You're done.

thanks
Kuldeep

Mar 13, 2009 | HP Operating Systems

2 Answers

How to connect from jsp login page to database


hey try this code......just found it on the net... Put the code in tomcat and test the application through browser. The browser should display the display the data stored in the table.

Here is the code of our JSP file
<%@ page language="java" import="java.sql.*"%>
<html>
<head><title>Read from mySQL Database</title>
</head>
<body>

<p align="center"><b>Following records are selected from the 'jakartaproject' table.</b><br>&nbsp;</p>

<div align="center" width="85%">
<center>
<table border="1" borderColor="#ffe9bf" cellPadding="0" cellSpacing="0" width="658" height="63">
<tbody>
<td bgColor="#008080" width="47" align="center" height="19"><font color="#ffffff"><b>Sr.
No.</b></font></td>
<td bgColor="#008080" width="107" height="19"><font color="#ffffff"><b>Project</b></font></td>
<td bgColor="#008080" width="224" height="19"><font color="#ffffff"><b>Url
Address</b></font></td>
<td bgColor="#008080" width="270" height="19"><font color="#ffffff"><b>Description
of the project</b></font></td>

<%
String DRIVER = "org.gjt.mm.mysql.Driver";
Class.forName(DRIVER).newInstance();


Connection con=null;
ResultSet rst=null;
Statement stmt=null;

try{
String url="jdbc:mysql://192.168.10.2/tutorial?user=tutorial&password=tutorial";

int i=1;
con=DriverManager.getConnection(url);
stmt=con.createStatement();
rst=stmt.executeQuery("select * from jakartaproject ");
while(rst.next()){

if (i==(i/2)*2){
%>
<tr>
<td bgColor="#ffff98" vAlign="top" width="47" align="center" height="19"><%=i%>.</td>
<td bgColor="#ffff98" vAlign="top" width="107" height="19"><%=rst.getString(2)%></td>
<td bgColor="#ffff98" vAlign="top" width="224" height="19"><a href="<%=rst.getString(3)%>"><%=rst.getString(3)%></a>&nbsp;</td>
<td bgColor="#ffff98" vAlign="top" width="270" height="19"><%=rst.getString(4)%></td>
</tr>
<%
}else{
%>
<tr>
<td bgColor="#ffcc68" vAlign="top" width="47" align="center" height="19"><%=i%>.</td>
<td bgColor="#ffcc68" vAlign="top" width="107" height="19"><%=rst.getString(2)%></td>
<td bgColor="#ffcc68" vAlign="top" width="224" height="19"><a href="<%=rst.getString(3)%>"><%=rst.getString(3)%></a>&nbsp;</td>
<td bgColor="#ffcc68" vAlign="top" width="270" height="19"><%=rst.getString(4)%></td>
</tr>
<% }

i++;
}
rst.close();
stmt.close();
con.close();
}catch(Exception e){
System.out.println(e.getMessage());
}
%>

</tbody>
</table>
</center>
</div>


</body>
</html>

Feb 27, 2009 | Compaq Operating Systems

1 Answer

What is use of Jdbc or odbc driver?


Hi,

Go through these links to get an overview of JDBC and ODBC:

http://en.wikipedia.org/wiki/Java_Database_Connectivity

http://en.wikipedia.org/wiki/Open_Database_Connectivity


Jan 17, 2009 | Operating Systems

1 Answer

Cant get ps3 connection to internet


First, you need an ethernet cord and of course an aircard. connect one end of the the ethernet cable to your playstation and the other to your laptop. View your network connections (control panel-->network and internet connections-->network connections). Right click on your aircard connection and click properties. On the aircard properties window click the advanced tab. on the tab there will be a box asking if you want to let others connect to this connection. check in that box. below there will be a box asking what the home networking connection is. Put **Local Area Connection** in the box. Last make sure firewall is turned off. On your playstation go to network connections and click easy and go from there. (dont try to put in IP adress or anything just let the playstation do it all automaticly). Test your connection and you should be good to go.

Oct 15, 2008 | Operating Systems

1 Answer

Java


Hello Sir,


The Spring Framework (or Spring for short) is an open source application framework for the Java platform. The first version was written by Rod Johnson, who first released it with the publication of his book Expert One-on-One J2EE Design and Development (Wrox Press, October 2002). A port is available for the .NET Framework.[1]
The framework was first released under the Apache 2.0 license in June 2003. The first milestone release, 1.0, was released in March 2004, with further milestone releases in September 2004 and March 2005.
Although the Spring Framework does not enforce any specific programming model, it has become popular in the Java community as an alternative, replacement, or even addition to the Enterprise JavaBean model. By design, the framework offers a lot of freedom to Java developers yet provides well documented and easy-to-use solutions for common practices in the industry.
While the core features of the Spring Framework are usable in any Java application, there are many extensions and improvements for building web-based applications on top of the Java Enterprise platform. Spring has gained a lot of popularity because of this, and is recognized by vendors as a strategically important framework.



The Spring Framework provides solutions to many technical challenges faced by Java developers and organizations wanting to create applications based on the Java platform. Because of the sheer vastness of the functionality offered, it can be hard to distinguish the major building blocks from which the framework is composed. The Spring Framework is not exclusively linked to the Java Enterprise platform, although its far-reaching integration in this area is an important reason for its popularity.
The Spring Framework is probably best known for offering features required to create complex business applications effectively outside of the programming models which have been dominant historically in the industry. Next to that, it is also credited for introducing previously unfamiliar functionalities into today's mainstream development practices, even beyond the Java platform.
This amounts to a framework which offers a consistent model and makes it applicable to most application types created on top of the Java platform today.
[Modules of the Spring Framework The Spring Framework can be considered as a collection of smaller frameworks. Most of these frameworks are designed to work independently of each other yet provide better functionalities when used together. These frameworks are divided along the building blocks of typical complex applications:
  • Inversion of Control container: configuration of application components and lifecycle management of Java objects.
  • Aspect-oriented programming framework: working with functionalities which cannot be implemented with Java's object-oriented programming capabilities without making sacrifices.
  • Data access framework: working with relational database management systems on the Java platform using JDBC and Object-relational mapping tools providing solutions to technical challenges which are reusable in a multitude of Java-based environments.
  • Transaction management framework: harmonization of various transaction management API's and configurative transaction management orchestration for Java objects.
  • Model-view-controller framework: HTTP and Servlet based framework providing many hooks for extension and customization.
  • Remote Access framework: configurative RPC-style export and import of Java objects over computer networks supporting RMI, CORBA and HTTP-based protocols including web services (SOAP).
  • Authentication and authorization framework: configurative orchestration of authentication and authorization processes supporting many popular and industry-standard standards, protocols, tools and practices via the Acegi sub-project.
  • Remote Management framework: configurative exposure and management of Java objects for local or remote configuration via JMX.
  • Messaging framework: configurative registration of message listener objects for transparent message consumption from message queues via JMS, improvement of message sending over standard JMS API's.
  • Testing framework: support classes for writing unit tests and integration tests.

Mar 11, 2008 | Microsoft Windows XP Professional With...

1 Answer

JDBC


steps to retrieve results.

create the driver.
Class.forName(" ");
create a connection.
Connection con_name=DriverManager.getConnection("Dbname","coloumn name");
create statement
Statement stmt_name=con_name.createStatement();
To retrieve resule fron DB use the below codes

ResuleSet rs;
rs=stmt_name.executeQuery("select * from DB name");

Mar 01, 2008 | Operating Systems

1 Answer

Final yr project


Nice project you can easy solve this problem first you want to known how to connect the java with sql or some other database. http://www.academictutorials.com/ this is the site this help you for your project. If you have any problem just contact me i will clear it.

Feb 17, 2008 | Operating Systems

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