In
this blog 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