JAVA & DATABASE

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DEPARTMENT OF ELECTRICAL ENGINEERING GADJAHMADA UNIVERSITY

JAVA & DATABASE

JDBC Introduction

• JDBC is basically used because it can access any database.

• JDBC uses drivers to connect to the database, which are categorized into four types.

• Jdbc has a set of exclusive interfaces and classes.

• Few steps to perform JDBC application.

JDBC Driver1. Jdbc-Odbc bridge driver : This bridge driver can be

used to connect to any existing database, I.e, ODBC compliant.

2. Native-API/partly Java driver : Converts JDBC calls into database specific calls for database such as SQl , Oracle etc. Driver is partly written in “Java” and partly in “C” .

3. Net-protocol/all-Java driver : This driver is used in Internet to connect to the database at different locations. This is supposed to be the most flexible driver.

4. Native-protocol/all-Java driver : Converts the JDBC calls into the network protocol used by DBMS’s directly. This is very much used in intranet access.

JDBC Architecture

JDBC API for Database

• Interfaces :– Connection– Statement– Result set– Prepared statement– Result set Meta data– Callable statement– D/B Meta data

• Classes :– Driver manager– Date Time– Types– Date– Driver property– information– Time stamp

• Ada 7 langkah untuk mengakses database:

1.Load Driver JDBC2.Mendefinisikan Koneksi URL yang dipakai3.Menghubungkan Koneksi tsb.4.Menciptakan statement object5.Mengeksekusi query atau update6.Memproses Hasil7.Memutuskan Koneksi

try {// Class.forName("org.gjt.mm.mysql.Driver"); // Step 1 Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); //

step1 } catch (Exception E) { E.printStackTrace(); } // end catch

try { con =

DriverManager.getConnection("jdbc:odbc:Database1");//,"root",""); // step 2 and 3

stmt = con.createStatement(); // step 4 rs = stmt.executeQuery("SQL Query'"); // step 5 while (rs.next()) { // step 6::} // while

stmt.close(); // step7con.close();

Access Database

• Microsoft Acess Database : db1

Setting Access Database

• Menset Database yang dipakai sebagai acuan dalam Program

• Start -> Control Panel -> ODBC Data Source

Setting Access Database• Tampil jendela ODBC Data Source Administrator• Click System DSN-> Add-> pilih Driver (Microsoft Access

Driver) -> Finish. Dalam hal ini kita memakai Access Database.• Tentukan Letak File Database yang digunakan

Setting Access Database

• Click OK• Data base db1 siap diakses oleh Program

JDBC Programpackage jdbc;import java.sql.*;

public class JDBCApp {

public static void main(String[] args) { Connection conn = null; Statement stmt = null; ResultSet rs = null;

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); // step1

} catch (ClassNotFoundException cnfe) {

System.err.println(cnfe); } catch (Exception E) { E.printStackTrace(); } // end catch

try { conn =

DriverManager.getConnection("jdbc:odbc:bukuJDBC");

// step 2 and 3stmt = conn.createStatement(); // step 4

rs = stmt.executeQuery("SELECT * FROM buku"); while (rs.next()) { // step 6 System.out.print(rs.getString("No") + " "); System.out.print(rs.getString("Judul") + " "); System.out.print(rs.getString("Pengarang") + " "); System.out.print(rs.getString("Penerbit") + " "); System.out.print(rs.getString("harga") + " "); System.out.println(""); } // while stmt.close(); conn.close();

} catch(SQLException sqle) { System.err.println("SQLException : " +

sqle.getMessage()); } // end cacth }}}

JDBC Program

• Hasil Program

1 Java 2 Complete Reference Patrick Naughton McGraw Hill 600000 2 Distributed Systems Tanenbaum Prentice Hall 500000 3 Home Networking Bible Plumley IDG Books 375000

• Bandingkan

JDBC Program dengan Access

• Setting perlu dilakukan pada Control Panel, untuk menset Database yang dipakai

• Pada Java Program tidak diperlukan setting apapun

• Sun telah menyediakan driver secara otomatis untuk Access

• Hal ini tidak berlaku untuk Sistem Database yang lain, misal: mysql, oracle, dll.

Mysql Database

• Mysql dapat didownload di : www.mysql.com/downloads

• Extract dan lakukan instalasi dengan memilih: Setup.exe

• Mysql terletak di C:\mysql

• Aktifkan mysql admin dengan double click di :

C:\mysql\bin\winmysqladmin

Mysql Database• Inilah tampilannya

• Atau tampak di pojok kanan bawah

Mysql Database

• Mysql database : test002• Tabel : tabel02

Java to mysql

• JDBC Driver for MySQL dapat di-download di : www.mysql.com/downloadsdengan nama : MySQL Connector/J 2.0.14

• Extract ke C:\• JDBC Driver akan terletak di subdirectory

C:\mysql-connector-java-2.0.14

Java to mysql• Dengan JBUILDER, buat program (class) Java misalnya :

JDBCTest01.java• Project -> Project Properties -> Path -> Required Libraries -

> Add... -> New, tuliskan nama library-nya, misal mysql-connector-java, click Add...

Java to mysql• Pilih subdirectory C:\mysql-connector-java-..., di mana JDBC

driver untuk mysql diletakkan, click OK

Java to mysql

• Library yang baru akan tampak seperti pada gambar, click OK

JDBC Programpackage jdbc01;

import java.sql.*;

public class JDBCTest01 {

public static void main(String[] args) { Connection conn = null; Statement stmt = null; ResultSet rs = null;

Class.forName("org.gjt.mm.mysql.Driver"); // Step 1} catch (ClassNotFoundException cnfe) {

System.err.println(cnfe); } catch (Exception E) { E.printStackTrace(); } // end catch

try { conn =

DriverManager.getConnection("jdbc:mysql://localhost:3306/test002","rsn","risanuri");

stmt = conn.createStatement(); // step 4 rs = stmt.executeQuery("SELECT * FROM tabel02"); while (rs.next()) { // step 6 System.out.print(rs.getString("Nomer") + " "); System.out.print(rs.getString("Judul") + " "); System.out.print(rs.getString("Pengarang") + " "); System.out.print(rs.getString("Penerbit") + " "); System.out.print(rs.getString("harga") + " "); System.out.println("Oke"); } // while stmt.close(); conn.close();} catch(SQLException sqle) { System.err.println("SQLException : " +

sqle.getMessage()); } // end cacth }}

Hasil JDBC mysql1 Core Servlets and JSP Marty Hall Prentice Hall 350000 Oke2 Java 2 Complete Reference Patrick Naughton McGraw Hill 600000

Oke3 J2EE Unleashed Bambara Allen Sams 600000 Oke

• Bandingkan

JDBC Program dengan mysql

• Setting tidak perlu dilakukan pada Control Panel

• Perlu dilakukan setting pada Java Program• Driver JDBC disediakan oleh mysql dan

harus di-download secara terpisah• Mysql memungkinkan memanggil

Database lewat jaringan

Tambahancon =

DriverManager.getConnection("jdbc:mysql://localhost:3306/pasiendreritta","root","");

stmt = con.createStatement(); stmt.executeUpdate("INSERT INTO catatanpasien VALUES('"+

navn[0] +"','"+ navn[1] +"','"+ navn[2] +"','"+ navn[3] +"','"+ navn[4] +"','"+ navn[5] +"');");

Mysql tools

• Dbtools• Mysql-front

Java to mysql

• Setting Classpath, prosesnya sama dengan setting classpath yang lain– Pada Win98, Start ->Run (sysedit),

kemudian pada autoexec.bat tambahkan C:\mysql-connector-java-2.0.14, yang merupakan letak subdir JDBC Driver

Java to mysql

• Compile– myjava>javac JDBCTest01.java

• Buat subdir jdbc01 di dalam :\myjava• Letakkan JDBCTest01.class pada subdir :\

myjava\jdbc01• Eksekusi

– \myjava>java jdbc01.JDBCTest011 Routing TCP/IP Jeff Doyle null 900000 Oke2 Top Down Network Design Oppenheimer 0 600000

Oke3 Java Security Jess Gams 0 500000 Oke

JAVA & DATABASE

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