Jdbc example program with access and MySql

JDBC example

http://www.java2all.com

Chapter 3

JDBC example


JDBC example with access:


To connect java application to access database we
must have at least one database created in
access.
Steps to create a database in MS-Access:
(1) Open Microsoft Office Access.
(2) Click on Blank Database.
(3) Type an appropriate name of database in File
Name: box for example, HOD_DATA and click on
Create Button.
(4) Create appropriate field name in table and value
as per the field.
EX.:

(5) Right click on Table1 and select Save. Type the
name of Table for example, DATA and click on OK
button.
(6) Close the Table by right clicking on DATA and
select Close. and Exit from Database
(7) Move this database to the appropriate drive where
you want.

Now lets create TYPE 1 driver program for
JDBC with access.


import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

public class Type_One
{
public static void main(String[] args)
{
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); //Load Driver
Connection con = DriverManager.getConnection("jdbc:odbc:HOD_DATA"); //Create
Connection with Data Source Name : HOD_DATA
Statement s = con.createStatement(); // Create Statement
String query = "select * from Data"; // Create Query
s.execute(query); // Execute Query
ResultSet rs = s.getResultSet(); //return the data from Statement into ResultSet
while(rs.next()) // Retrieve data from ResultSet
{
System.out.print("Serial number : "+rs.getString(1)); //1st column of Table from database
System.out.print(" , Name : "+rs.getString(2)); //2nd column of Table
System.out.print(" , City : "+rs.getString(3)); //3rd column of Table
System.out.println(" and Age : "+rs.getString(4)); //4th column of Table
}


s.close();
con.close();
}
catch (Exception e)
{
System.out.println("Exception : "+e);
}
}
}

Output :

Serial number : 1 , Name : Ashutosh Abhangi ,
City : Dhoraji and Age : 27
Serial number : 2 , Name : Kamal Kotecha ,
City : Junagadh and Age : 24


Key point:

String which we are writing in
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver") to
load the driver.

String which we are writing in Connection con =
DriverManager.getConnection("jdbc:odbc:HOD_DA
TA") to create connection with particular database.

Here HOD_DATA is our DSN (Data Source Name).


Steps for creating DSN for access.

(1) Go to Control Panel.
(2) Click on Administrative Tools(Window XP) for
(Window 7) System and Security then Administrative
Tools.
(3) Click on Data Sources (ODBC).
(4) Select MS Access Database and Click on Add
button.
Here in Windows XP you can easily add new
DSN but if you are getting an error or not able to add
new DSN in Window 7 go
to C:WindowsSysWOW64 and then open
odbcad32.exe and repeate step 4. http://www.java2all.com

(5) Select Microsoft Access Driver
(*.mdb,*.accdb) and Click on Finish button.
If you cant find the below driver then you should
download JDBC ODBC Driver for ms access.


(6) Type Data Source Name, for example
HOD_DATA then click on Select button in the
Database frame.

(7) Select particular database which we saved on
particular drive and created at beginning of this page
(HOd_DATA). and click on OK button.


(8) Click on OK button and Check out the textarea of
Data Sources Administrator. Now it contains a new
DSN as a HOD_DATA.


(9) Click on OK button and close the Administrative
Tools (Control Panel).

NOTE:
Do not confuse your self due to Database
Name and Data Source Name, Here Both are same
HOD_DATA but we can take different name too.

One more thing there may be a 32 bit or 64 bit
issue like architecture mismatch so java2all
recommend you that please make them all same.

Your java IDE tool, Microsoft Aceess and JVM
or JDK all must be the same bit (32/64) version.

Now run the above program and check out the
output.


PreparedStatement in access:


Lets now move to PreparedStatement example
for access.
First of all lets assume that we have table named
PA in access.


And our DSN is DATA.
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;

public class Prepare_Demo
{
{
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection("jdbc:odbc:DATA");

PreparedStatement ps = con.prepareStatement("insert into PA
(ID,Name,CITY,AGE)values(?,?,?,?)");

ps.setInt(1,200);
ps.setString(2, "hello");
ps.setInt(4,101);
ps.setString(3, "brd");


ps.executeUpdate();
System.out.println("inserted");
con.close();
}
catch (Exception e)
{
System.out.println(e);
}
}
} Output :

inserted

First run the above program with suitable table
and after running it refresh your access database and
you cDSN an see one record inserted as per our
program.

You can run PreparedStatement program for JSP too
with dynamic data.

For this we will create two JSP file one for inserting
data (simple form with text box as per our table).

Second JSP file contains logic for connecting
data base as well as PreparedStatement logic for
inserting data.

Insert_data.jsp
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert DATA</title>
</head>
<body>
<form action="datams.jsp">
ID: <input type="text" name="ID"/>
NAME : <input type="text" name="NAME"/>
AGE : <input type="text" name="AGE"/>
CITY : <input type="text" name="CITY"/>
<input type="submit" value ="INSERT">
</form>
</body>
</html>


Now insert value in text box as you want to
insert in database as shown below.

Remember here too our DSN and Table are same as
above program.


You can see the data here which i want to insert
in our database.
datams.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1" import="java.sql.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Insert title here</title>
</head>
<body>
<%
int id = Integer.parseInt(request.getParameter("ID"));
int age = Integer.parseInt(request.getParameter("AGE"));
String nm = request.getParameter("NAME");
String ct = request.getParameter("CITY");
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection("jdbc:odbc:DATA");


PreparedStatement ps = con.prepareStatement("insert into PA
(ID,Name,CITY,AGE)values(?,?,?,?)");

ps.setInt(1,id);
ps.setString(2,nm);
ps.setInt(4,age); Output :
ps.setString(3,ct);

ps.executeUpdate(); inserted
System.out.println("inserted");
con.close();
}
catch (Exception e)
{
System.out.println(e);
}
%>
</body>
</html>

Now again refresh your table data and you can
see one more new record which we inserted
dynamically.

With access we can not do CallableStatement because
access does not support stored procedure.
We will do it in mysql and oracle in next chapters.

JDBC connection for MySQL:


To connect java application to MySQL database
we must have at least one database created in MySQL.
And to create database in MySQL,it should be
installed on your system.

So first of all install MySQL database in your
system.

After installing it open MySQL console.


Create database with syntax create database
databasename; and press enter.

You can see message like Query OK, 1 row
affected (0.03 sec)

Now our database is created in MySQL. Second
step is to create table in our database.

For creating table in particular database
type Use databasename; and press enter and you can
see message like database changed. Now for creating
table type create table tablename (field1 type of field1,
field2 type of field2, field3 type of field3); http://www.java2all.com

Now for creating table type create table
tablename (field1 type of field1, field2 type of field2,
field3 type of field3);

Now press enter again you can see the message
like Query OK, 0 row affected (0.01 sec).

EX:

Create database java2all;

Use java2all;


Create table data (id int,name char(20),city
char(20),age int);

Now the next step is to insert data into our table.

For inserting data simply type insert into table
name (field1,field2,field3) values
(value1,value2,value3);

EX:
insert into data (id,name,city,age) values
(1,"java","abc",300);


So by that’s way you can insert as many data as
you want in your table. Now for viewing our data
from table just type select * from tablename;

EX:

select * from data;


Now we have data in our table, table in our
database, database in our MySQL and MySQL in our
system.

So let`s now move to JDBC program with MySQL.
Simple Statement in JDBC with MySQL:
import java.sql.*;
public class MysqlDemo
{
{
try
{
Class.forName("com.mysql.jdbc.Driver");
System.out.println("Driver is loaded");
Connection c =
DriverManager.getConnection("jdbc:mysql://localhost:3306/java2all","root","root");
System.out.println("Connection created");
Statement s = c.createStatement();

<span class="IL_AD" id="IL_AD3">ResultSet</span> rs = s.executeQuery("select *

from data");
System.out.println("IDtNametCitytAge");

{
System.out.println(rs.getString(1)+"t"+rs.getString(2)+"t"+rs.getStrin
g(3)+"t"+rs.getString(4));
}

} Output :
catch(Exception e)
{

System.out.println("Exception : " +e);Driver is loaded
}
} Connection created
} ID   Name  City    Age
1     java      abc    300
2     JDBC  xyz   200
3     JSP     mno  100


Key point:
String which we are writing in
Class.forName("com.mysql.jdbc.Driver"); to load
the driver.
String which we are writing in Connection con =
DriverManager.getConnection("jdbc:mysql://localho
st:3306/java2all","root","root") to create
connection with particular database.
Here the string jdbc:mysql://localhost:3306 is for
connecting MySQL to JDBC in our local system and
the name /java2all is our database name and 1st "root"
is username of MySQL and 2nd "root" is password of
MySQL.

Here no need of Data Source Name as in access
but one jar file named mysql-connector-java-5.1.6-
bin.jar must be loaded in your java IDE.

In eclipse for adding jar file simply right click on
your project and select build path ? configure build
path and you can see window like this.


Click on libraries tab then click on Add External
JARs..

And select proper path where your jar file is
located on your system.

If you don’t have jar file you can easily
download it from the web for free

After selecting your jar file you can see its now
added to our library for that particular project.


After adding jar file in our library we can now easily
run our program.
Statement in JDBC with MySQL for inserting
data:
java.sql.*;
class Mysql_insertDemo

ic static void main(String[] args)

y

Connection c = DriverManager.getConnection("jdbc:mysql://localhost:3306/java2all","ro
String s = "insert into data (id,name,city,age) values (4,'Servlet','JND',120)";
Statement sm = c.createStatement();
sm.execute(s);


catch(Exception e)

{
System.out.println("Exception : "
+e);
}
}
}

Output :

Driver is loaded
Connection created
Inserted


PreparedStatement in JDBC with MySQL:
import java.sql.*;
public class Mysql_insertDemo
{
{
try
{
Connection c =
DriverManager.getConnection("jdbc:mysql://localhost:3306/java2all","root","kamal");
String s = "insert into data (id,name,city,age) values (?,?,?,?)";
PreparedStatement ps = c.prepareStatement(s);
ps.setInt(1, 6);
ps.setString(2, "J2EE");
ps.setString(3, "AAA");
ps.setInt(4, 55);
ps.execute();
c.close();
System.out.println("Inserted");


catch(Exception e)

        {
                System.out.println("Exception : " +e);

        }
    }
}
Output :

Driver is loaded
Connection created
Inserted

You can run PreparedStatement program for
JSP too with dynamic data.

For this we will create two JSP file one for
inserting data (simple form with text box as per our
table). http://www.java2all.com

You can run PreparedStatement program for
JSP too with dynamic data.

For this we will create two JSP file one for
inserting data (simple form with text box as per our
table).

Second JSP file contains logic for connecting
data base as well as PreparedStatement logic for
inserting data.

Insert_data.jsp


<html>

<head>
<title>Insert DATA</title>
</head>
<body>
<<span class="IL_AD" id="IL_AD4">form action</span>="datamysql.jsp">
ID: <input type="text" name="ID"/>
NAME : <input type="text" name="NAME"/>
AGE : <input type="text" name="AGE"/>
CITY : <input type="text" name="CITY"/>
<input type="submit" value ="INSERT">
</form>
</body>
</html>

Now insert value in text box as you want to
insert in database as shown below.


You can see the data here which i want to insert in our
database.
datamysql.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1" import="java.sql.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Insert title here</title>
</head> http://www.java2all.com

<%

int id = Integer.parseInt(request.getParameter("ID"));
int age = Integer.parseInt(request.getParameter("AGE"));
String nm = request.getParameter("NAME");
String ct = request.getParameter("CITY");
try
{
Connection c =
String s = "insert into data (id,name,city,age) values (?,?,?,?)";
PreparedStatement ps = c.prepareStatement(s);
ps.setInt(1, id);
ps.setString(2, nm);
ps.setString(3, ct);
ps.setInt(4, age);
ps.execute();
c.close();
System.out.println("Inserted");
}
catch(Exception e)
{

}

%>

</body>
</html>
Output :

Driver is loaded
Connection created
Inserted

You can see your data as we inserted through
program.


CallableStatement in MySQL:

Now we all know that for CallableStatement first
of all we must have stored procedure in our database.

Now how can we create stored procedure in
MySQL.

For that follow the steps given below.


We already create a database in MySQL now
for creating stored procedure for that particular
database

Use java2all; (use databasename;)

Example stored procedure for addition of two
numbers.
Copy and paste it in your MySQL console after
selecting your database.
DELIMITER $$
CREATE PROCEDURE `addproc`( IN a INT, IN b INT, OUT c INT)
BEGIN
SET c = a + b;
END$$ http://www.java2all.com

You can get message like Query OK, 0 rows
affected (0.04 sec)

It means your stored procedure is created
successfully.

Here we create stored procedure for add two int
number.

The stored procedure has 2 IN parameter and 1
OUT parameter so total 3 parameters

Now let us move to JDBC program for
CallableStatement in MySQL http://www.java2all.com

import java.sql.*;

public class Mysql_callableDemo
{
{
try
{
Connection c =
String q = "call addproc(?,?,?)";
CallableStatement cs = c.prepareCall(q); Output :
cs.setInt(1, 10);
cs.setInt(2, 20);
cs.registerOutParameter(3, Types.INTEGER);
cs.execute(); Driver is loaded
int add = cs.getInt(3);
System.out.println("addition = "+add);
Connection created
} addition = 30
catch(Exception e)
{
}
}
}

To call a storedprocedure you can see the syntax
in our program.

Call storedprocedurename(parameter);

Here two more methods are introduced 1st is
registerOutParameter(3, Types);

We have to register our out parameter with the
method given above.

This method has two arguments 1st is sequence
of question mark we passed in calling of stored
procedure. http://www.java2all.com

2nd is out parameter type here it is integer type
and question mark sequence is 3 so we write


2nd method is getXXX(int sequence_number);

The working of this method is same as setXXX(),
which we used in PreparedStatement and
CallableStatement.

But setXXX() is for set a value and getXXX() is
for getting a particular value as you can see in our
program. http://www.java2all.com

Now let’s take one more example of
CallableStatement.

Here we are going to create stroredprocedure that
returns the data as per the id.

Our data in table is something like that.


Stored Procedure:

DELIMITER $$
CREATE PROCEDURE `datainfo`( IN sid INT,OUT
sname VARCHAR(20), OUT scity
VARCHAR(20),OUT sage INT)
BEGIN
select name,city,age INTO sname,scity,sage from data
where id=sid;
END$$


We will pass the id when we call the stored procedure
and it will return name,city and age as per the id we
passed.

EX:
import java.sql.*;
import java.util.Scanner;

public class Mysql_callableDemo
{
{
int i;
try
{
Scanner s = new Scanner(System.in);
System.out.println("Enter ID");
i=s.nextInt();
Connection c =

String q = "call datainfo(?,?,?,?)";
CallableStatement cs = c.prepareCall(q);
Output :
cs.setInt(1,i);
cs.registerOutParameter(2, Types.VARCHAR);
cs.registerOutParameter(3, Types.VARCHAR); Enter ID
cs.execute(); 1
String nm = cs.getString(2);
String ct = cs.getString(3);
Driver is loaded
int age = cs.getInt(4); Connection created
System.out.println("Name = "+nm);
System.out.println("City = "+ct); Name = java
System.out.println("Age = "+age);
} City = abc
catch(Exception e)
{
Age = 300
}
}
}

For closing the connection in each and every program
of JDBC we should call the method close() through
Connection object c.close(); http://www.java2all.com

As my friend suggest me we should call close()
method to close our connection with database from
finally block so close() method will execute in all
circumstances.

Even if a try block has an exception our
connection will be closed safely.

EXample with finally block:


import java.sql.*;
public class MysqlDemo
{
public static void main(String[] args) throws SQLException
{
Connection c = null;
try
{
c = DriverManager.getConnection("jdbc:mysql://localhost:3306/java2all","root","root");
Statement s = c.createStatement();
ResultSet rs = s.executeQuery("select * from data");
System.out.println("IDtNametCitytAge");

{
System.out.println(rs.getString(1)+"t"+rs.getString(2)+"t"+rs.getString(3)+"t"+rs.g
etString(4));
}

}


catch(Exception e)
{
}
finally
{
c.close();
}
}

}


Jdbc example program with access and MySql

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