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Display records from database using JDBC

Posted By:satyapriyanayak       Posted Date: January 01, 2015    Points: 40    Category: Javascript    URL: http://www.dotnetspark.com  

In this Code Snippets we will know how to display records from database using JDBC (Java Database Connectivity) in console window.
 

Here we use Type-1 driver (JDBC-ODBC bridge)

Creation of dsn(database source name) for Oracle
 
Start-Control panel- Administrative Tools- Data Sources (ODBC)-go to system dsn tab-click add button-select a driver for which you want to set up data source (for Oracle- Oracle in XE)-select it and click finish-give any name in data source name textbox-then click ok button.

Note: - Here Username=system, Password=pintu and Dsn name=dsn1

Table Creation
Create table employee (empno int,empname varchar(50),sal int)

Example:- To select record from a table

/*To select record from a table by using Statement*/
import java.sql.*;
public class select
{
public static void main(String args[]) throws Exception{
 //Step-1
//load the class for driver
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
//Step -2
Connection con=DriverManager.getConnection("jdbc:odbc:dsn1","system","pintu");
//Step -3
System.out.println("Connected to database");
Statement stmt=con.createStatement();
//Step-4
ResultSet rs=stmt.executeQuery("select * from employee");
//Fetching data from ResultSet and display
while(rs.next())
{
//to fetch value from a column having number type of value
int x=rs.getInt("empno");
//to fetch value from a column having varchar/text type of value
String y=rs.getString("empname");
//to fetch value from a column having number type of value
int z=rs.getInt("sal");
System.out.println(x+"   "+y +" "+z);
}
//Step-5
con.close();
}
}

Compile
Javac select.java
Java select


     

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