Hi Iam new With Perl i would like to know who to connect a any database with perl and what is the way to create a perl.pm file like when we create a class in java which is like i have a code in java where i create a business class . i want to create a same class in perl
Code:
package Project_Race;
and One more thing i want to know how to create a DatabaseConnection class which connects the database and select or insert if u have some kind of sample class then please Show me .i have one in java .
if some has sample code for connecting with database or fecthing the data from database in some dropdown list.
Code:
package Project_Race;
Code:
/**
* Author Muhammad Butt
* File Name : Participant
* FileTYpe : Business Class
* Purpose : This java file will be used to store the data of
* participants like name , finnishing time.
*
*/
import java.util.Date;
public class Participant {
/**
* Declaring the variables which are going to be
* use when displaying the data to the jsp
* and it will also store the data coming from a database by
* the help of participantsDAO
*/
int participant_number ;
String Firstname ;
String Lastname ;
Date Finnishing_time;
int place;
/**
* @return the place
*/
public int getPlace() {
return place;
}
/**
* @param place the place to set
*/
public void setPlace(int place) {
this.place = place;
}
/**
* @return the finnishing_time
*/
public Date getFinnishing_time() {
return Finnishing_time;
}
/**
* @param finnishing_time the finnishing_time to set
*/
public void setFinnishing_time(Date finnishing_time) {
Finnishing_time = finnishing_time;
}
/**
* @return the firstname
*/
public String getFirstname() {
return Firstname;
}
/**
* @param firstname the firstname to set
*/
public void setFirstname(String firstname) {
Firstname = firstname;
}
/**
* @return the lastname
*/
public String getLastname() {
return Lastname;
}
/**
* @param lastname the lastname to set
*/
public void setLastname(String lastname) {
Lastname = lastname;
}
/**
* @return the participant_number
*/
public int getParticipant_number() {
return participant_number;
}
/**
* @param participant_number the participant_number to set
*/
public void setParticipant_number(int participant_number) {
this.participant_number = participant_number;
}
/**
* This method will display all the information
* available of participants
*/
public String toString()
{
return (participant_number+" "+Firstname+" "+Lastname+" "+Finnishing_time);
}
}
############################################################
Code:
package Project_Race;
import java.sql.* ;
import java.util.* ;
import java.util.Date;
import javax.swing.JOptionPane;
public class ParticipantsDAO {
// this is for using : oracleprivate final String jdbcDriverName = "oracle.jdbc.driver.OracleDriver" ;
private final String jdbcDriverName = "sun.jdbc.odbc.JdbcOdbcDriver" ;
private final String connectionString = "jdbc:odbc:atk84f_DB" ;
private boolean jdbcDriverLoaded = false ;
private Connection c;
/**
* This metho will create a connection every time when this class instance will be created
* method name: doconnection
* @return
* @throws Exception
*/
public Connection doConnection()
throws Exception
{
if(jdbcDriverLoaded ==false)
loadDriver();
try
{ c=DriverManager.getConnection(connectionString);
}catch(Exception e)
{
JOptionPane.showMessageDialog(null,"Error-010\nDatabase is not connected","Insert",
JOptionPane.WARNING_MESSAGE);
}
System.out.println("connected");
return c;
}
/**
* This method will fatch the data of all the participants
* and store it in participants business class
* @return
* @throws Exception
* method : getPList
*/
public Vector getPList ()
throws Exception
{
Statement statement ;
ResultSet resultSet ;
String q_text="";
Participant participant;
Vector <Participant> myVector = new Vector <Participant> () ;
try
{
// 2) Create a statement object for executing SQL
statement = doConnection().createStatement () ;
// 3) Execute SQL
q_text = "SELECT PARTICIPANTNUMBER,FIRSTNAME,LASTNAME,FINNISHINGTIME FROM RACE order by LASTNAME";
resultSet = statement.executeQuery (q_text) ;
while (resultSet.next())
{
participant = new Participant();
participant.setParticipant_number(resultSet.getInt("PARTICIPANTNUMBER"));
participant.setFirstname(resultSet.getString ("FIRSTNAME"));
participant.setLastname(resultSet.getString ("LASTNAME"));
participant.setFinnishing_time(resultSet.getTime("FINNISHINGTIME"));
myVector.add (participant) ;
}
resultSet.close () ;
// 4) Close the statement
statement.close () ;
// 5) Close the database connection
doConnection().close () ;
return (myVector) ; // Return the data...
}
catch(SQLException sqle)
{
printSQLException (sqle, q_text) ;
throw sqle ;
}
}//end PLIST
/**This method will fatch the data of all the participants
* who have finnished the race and store it in participants business class
* @return
* @throws Exception
* method : PFList
*/
public Vector getPFList ()
throws Exception
{
Statement statement ;
ResultSet resultSet ;
String q_text="";
Participant participant;
Vector <Participant> myVector = new Vector <Participant> () ;
try
{
// 2) Create a statement object for executing SQL
statement = doConnection().createStatement () ;
// 3) Execute SQL
q_text = "SELECT participantnumber,FirstName,LastName,FinnishingTime FROM RACE where FinnishingTime is not null order by FinnishingTime";
resultSet = statement.executeQuery (q_text) ;
int place = 0;
while (resultSet.next())
{
place++;
participant = new Participant();
participant.setPlace(place);
participant.setParticipant_number(resultSet.getInt("participantnumber"));
participant.setFirstname(resultSet.getString ("FirstName"));
participant.setLastname(resultSet.getString ("LastName"));
participant.setFinnishing_time(resultSet.getTime("FinnishingTime"));
myVector.add (participant);
}
resultSet.close () ;
// 4) Close the statement
statement.close () ;
// 5) Close the database connection
doConnection().close () ;
return (myVector) ; // Return the data...
}
catch(SQLException sqle)
{
printSQLException (sqle, q_text) ;
throw sqle ;
}
}//end PFLIST
/**
* This method will be used for Update Participants database
* and take the data of participants in the form of parameters
* and these paramers will be used to update the database
*/
public void UpdateParticipant(
int participant_number,String Firstname,
String Lastname,
String Finnishing_time)
{
Connection con;
Statement statement;
String sql;
sql = "";
try
{ con = doConnection() ;
statement = con.createStatement();
sql = "INSERT INTO RACE (Participantnumber,Firstname,Lastname,Finnishingtime)values ('"+participant_number+"','"+Firstname+"','"+Lastname+"','"+Finnishing_time+"')";
int query = statement.executeUpdate(sql) ;
if (query ==0)
{
JOptionPane.showMessageDialog(null,"Data is not inserted","Error",
JOptionPane.WARNING_MESSAGE);;
}
else
JOptionPane.showMessageDialog(null,"Data is Inserted","Insert",
JOptionPane.WARNING_MESSAGE);
// 4) Close the statement
statement.close () ;
// 5) Close the database connection
con.close();
}catch(Exception e)
{
String searchError = e.getMessage();
System.out.println(e.getMessage());
JOptionPane.showMessageDialog(null,searchError,"Insert Error",
JOptionPane.WARNING_MESSAGE);
}
}//UpdateParticipants End
/** ******************************************************************
* loadDriver
******************************************************************** */
public void loadDriver () throws Exception
{
try
{
Class.forName (jdbcDriverName) ; // Load the JDBC driver
jdbcDriverLoaded = true ;
}
catch (Exception e) // Exception handler
{
System.out.println ("********** JDBC ERROR ***********") ;
System.out.println ("Source : ParticipantsDAO.java") ;
System.out.println ("Message: Could not load the JDBC driver " +
jdbcDriverName) ;
throw e ; // Throw the exception again...
}
}
/** ******************************************************************
* printSQLException
******************************************************************** */
private void printSQLException (SQLException sqle, String q_text)
{
System.out.println ("********** SQL ERROR ************") ;
System.out.println ("Source : ParticipantsDAO.java") ;
System.out.println ("SQL text : " + q_text) ;
System.out.println ("Exception: " + sqle) ;
}
}
############################################################if some has sample code for connecting with database or fecthing the data from database in some dropdown list.
![[wiggle]](/data/assets/smilies/wiggle.gif "[wiggle] [wiggle]")
