Java MySQL Connectivity
By Prof. B.A.Khivsara
Note: The material to prepare this presentation has been taken from internet and are generated only for students reference and not for commercial use.
Implement MYSQL/Oracle database connectivity with PHP/ python/Java. Implement Database navigation operations (add, delete, edit,) using ODBC/JDBC.
Outline
Software Required and Steps
Create connection
Insert Data
Update Data
Delete Data
Display/Select Data
Program
Software Required and Steps
• Eclipse
• JDK 1.6
• MySQL
• Java-MySQL Connector
In Eclipse perform following steps:
1. File - New – Java Project –Give Project Name – ok
2. In project Explorer window- right click on project name-new- class- give Class name- ok
3. In project Explorer window- right click on project name- Build path- Configure build path- Libraries- Add External Jar - Java-MySQL Connector
4. In MySQL first Create one Database with name db1 and one table with name stud(name,age)
Outline
Software Required and Steps
Create connection
Insert Data
Update Data
Delete Data
Display/Select Data
Program
Import packages, Load Driver, Create connection with MySQL Database
• Import packages
import java.sql.*;
• Load Driver
Class.forName("oracle.jdbc.driver.OracleDriver");
• Create connection
Connection con = DriverManager.getConnection( "jdbc:mysql://localhost:3306/DatabaseName","username","passwd ");
Outline
Software Required and Steps
Create connection
Insert Data
Update Data
Delete Data
Display/Select Data
Program
Create JDBC statement(s)
8
• Creates a Statement object for sending SQL statements to the database
• Statement stmt = con.createStatement() ;
Executing SQL Statements
9
•executeUpdate – This Method is used for
insert, update and delete queries
• Example • String sql = “INSERT INTO stud VALUES (‘Ankita’,21)";
• stmt.executeUpdate(sql);
Executing SQL Statements
10
•executeUpdate – This Method is used for
insert, update and delete queries
• Example • String sql = “update stud set name=‘sumit’ where
name=‘Ankita’;
• stmt.executeUpdate(sql);
Executing SQL Statements
11
•executeUpdate – This Method is used for
insert, update and delete queries
• Example • String sql = “delete from stud where name=‘sumit’ ";
• stmt.executeUpdate(sql);
Outline
Software Required and Steps
Create connection
Insert Data
Update Data
Delete Data
Display/Select Data
Program
Get ResultSet (SELECT Query)
13
String sql1 = "SELECT name, age FROM stud"; //Write a select query in any string variable
ResultSet rs = stmt.executeQuery(sql1); //executeQuery used to run the select query and store the result in ResultSet
while (rs.next()) //Iterate through ResultSet till data is found
{
String name1 = rs.getString(“name"); //Store name data into name1 variable
int age1 = rs.getInt(“age"); //Store age data into age1 variable
}
Close connection
14
• stmt.close();
• con.close();
Outline
Software Required and Steps
Create connection
Insert Data
Update Data
Delete Data
Display/Select Data
Program
Sample program
16
import java.sql.*;
public class MySQLProcedure {
public static void main(String[] args) {
try{
Class.forName("com.mysql.jdbc.Driver");
Connection c = DriverManager.getConnection("jdbc:mysql://
localhost: 3306/ db1","root", "");
Statement sm = c.createStatement();
Sample program(cont)
int ch;
do {
System.out.println("Enter Chice \n 1.Insert \n 2.Select \n 3.Update \n 4.Delete \n 5.Exit ");
ch=s.nextInt();
switch (ch) {
case 1: sql = “Insert into stud values (‘Ankita’ ,1)";
sm.executeUpdate(sql);
System.out.println(“Record is Inserted");
break;
Sample program(cont)
18
case 2: String sql = "SELECT name, age FROM stud";
ResultSet rs = sm.executeQuery(sql);
while(rs.next())
{
String name1 = rs.getString("name");
int rno1 = rs.getInt(“rno");
System.out.print("name " + name1);
System.out.println(", Age: " + rno1);
}
break;
Sample program(cont)
case 3: sql = “update stud set name=‘Mona’ where name=‘Ankita’ ";
sm.executeUpdate(sql);
System.out.println(“Record is updated");
break;
case 4: sql = “delete from stud where rno=1";
sm.executeUpdate(sql);
System.out.println(“Record is deleted");
break;
} }while(ch<5);
}
catch(Exception e){
e.printStackTrace();
} } }
