JavaDatabaseJava DatabaseOleh : Agus Priyanto, M.Kom

SEKOLAH TINGGI TEKNOLOGI TELEMATIKA TELKOMSmart, Trustworthy, And Teamwork

Outline Materi1. Koneksi Aplikasi Java ke Database

2. Studi Kasus Aplikasi Java Database

Koneksi Aplikasi Java keD bDatabase

Tahapan Akses Database dengan JDBCTahapan Akses Database dengan JDBC

DriverDriverMySQLMySQL PostgreSQLPostgreSQL OracleOracle

DriverManagerDriverManager

MySQLMySQL PostgreSQLPostgreSQL OracleOracle

ConnectionConnection

DriverManagerDriverManager

ConnectionConnectionuseruser passwordpassword hosthost databasedatabase urlurl

StatementStatementselectselect updateupdate createcreate insertinsert

ResultSetResultSet

JDBC (Java DB Connectivity)J (J y)

Java application{{ ..."SELECT ... FROM ... WHERE"

}... }

DBMS

JDBC DriversJDBC DriversJava

application JDBC-APIpp

JDBC-Driver manager

NativeProtocol driver

JDBC-Net-driver

NativeAPI-driver

JDBC-ODBCbridge

Client libraryDB-Middleware ODBCMiddleware

Client library

Running a JDBC ApplicationRunning a JDBC Application

Phase Task Relevant java sql classesPhase Task Relevant java.sql classes

Initialisation Load driverCreate connection

DriverManagerConnection

Processing Generate SQL statementsProcess result data

StatementResultSet etc.

Termination Terminate connectionRelease data structures

ConnectionStatement etc.

A Simple JDBC Applicationp J pploadDriverloadDriver import java.sql.*;

public class jdbctest {

getConnectiongetConnection

createStatementcreateStatement

public static void main(String args[]){try{Class.forName("org.postgresql.Driver");Connection con = DriverManager.getConnection

execute(SQL)execute(SQL)

Result handlingResult handling

("jdbc:postgresql://lsir-cis-pc8:5401/pcmdb", "user", "passwd");Statement stmt = con.createStatement();ResultSet rs = stmt.executeQuery

("select name, number from pcmtable where number < 2");

MoreMoreresults ?results ?

yesyes

( , p );while(rs.next())

System.out.println(rs.getString(1) + " (" + rs.getInt(2) + ")");stmt.close() con close();

closeStatmentcloseStatment

nonocon.close();

} catch(Exception e){System.err.println(e);

}}}closeConnectioncloseConnection }}

Loading of DrivergCreates an instance of the driver

Registers driver in the driver manager

Explicit loadingString l driver = "org.postgresql.Driver";String l_driver org.postgresql.Driver ;Class.forName(l_driver);

Several drivers can be loaded and registered

Implicit Driver LoadingImplicit Driver LoadingSetting system property: jdbc.driversA colon-separated list of driver classnamesp

Can be set when starting the applicationjava Djdbc drivers=org postgresql Driver applicationjava -Djdbc.drivers=org.postgresql.Driver application

Can also be set from within the Java applicationP S P ()Properties prp = System.getProperties();prp.put("jdbc.drivers"

"com.mimer.jdbc.Driver:org.postgresql.Driver");System.setProperties(prp);y p (p p);

The DriverManager class attempts to load all the classes specified in jdbc drivers when the classes specified in jdbc.drivers when the DriverManager class is initialized

Addressing DatabasegA connection is a session with one databaseD t b dd d i URL f th f Databases are addressed using a URL of the form "jdbc:<subprotocol>:<subname>"ExamplesExamples

• jdbc:postgresql:database• jdbc:postgresql://host/databasejdbc:postgresql://host/database• jdbc:postgresql://host:port/database

Defaults: host=localhost, port=5432, p

Connecting to DatabasegConnection is establishedConnection con = Connection con = DriverManager.getConnection(URL,USERID,PWD);

Connection properties (class Properties)

Close the connectioncon.close();

Simple SQL StatementspStatement object for invocationstmt = con createStatement();stmt = con.createStatement();ResultSet rset= stmt.executeQuery(

"SELECT address,script,type FROM SELECT address,script,type FROM worklist");

ResultSet object for result processing

Studi Kasus Aplikasi Database

Aplikasi Databasep

1. Aplikasi Telepon

2. Aplikasi Gurup

3 Aplikasi Bank 3. Aplikasi Bank

4. Aplikasi Penjualan Barang

AplikasiTeleponp p1. Buka browser, arahkan url ke http://localhost dan

klik link ke phpMyAdminklik link ke phpMyAdmin2. Buat database telepon3 Buat satu table bukutelepon yang berisi field dengan3. Buat satu table bukutelepon, yang berisi field dengan

id sebagai primary key (PK):id integer (auto increment)g ( )nama varchar(20)alamat varchar(50)

l h (20)telepon varchar(20)handphone varchar(20)

Autoincrement di PostgreSQL

CREATE SEQUENCE bukutelepon_id_seq;

ALTER TABLE bukuteleponALTER COLUMN id

SET DEFAULT NEXTVAL('bukutelepon_id_seq');

UPDATE b k lUPDATE bukuteleponSET id = NEXTVAL('bukutelepon_id_seq');

Cek Koneksi ke Database MySQLCek Koneksi ke Database MySQLString user="root"; String pswd =""; String host="localhost"; String db="telepon"; String url=""; g ; g p ; g ;try {

Class.forName("com.mysql.jdbc.Driver"); url="jdbc:mysql://"+ host +"/"+ db +"?user=" + user + "&password="+ pswd; url jdbc:mysql:// host / db ?user user &password pswd; Connection conn=DriverManager.getConnection(urlValue); System.out.println("koneksi sukses"); conn close(); conn.close();

} catch (SQLException e){ System.out.println("koneksi gagal " + e.toString());

} t h(Cl N tF dE ti ) { } catch(ClassNotFoundException e) { System.out.println("jdbc.Driver tidak ditemukan");

}

Cek Koneksi ke Database PostgreSQLCek Koneksi ke Database PostgreSQL

String user="root"; String pswd =""; String host="localhost"; String db="telepon"; String url=""; try {

Class.forName(“org.postgresql.Driver"); url="jdbc:postgresql://"+ host +"/"+ db +"?user=" + user + "&password="+ pswd; Connection conn=DriverManager.getConnection(urlValue); System.out.println("koneksi sukses"); y p ( )conn.close();

} catch (SQLException e){ System.out.println("koneksi gagal " + e.toString()); System.out.println( koneksi gagal e.toString());

} catch(ClassNotFoundException e) { System.out.println("jdbc.Driver tidak ditemukan");

} }

Aplikasi Guru

Aplikasi Guru1. Buat database Guru2. Buat satu table dataguru, yang berisi field dengan nip

sebagai primary key (PK). Field yang lain adalah seperti di bawah:

1 nip integer (auto increment)1. nip integer (auto increment)2. nama varchar(30)3. status varchar(20)4. institusi varchar(30)5. kota varchar(30)6. handphone varchar(20)p ( )7. jeniskelamin varchar(20)8. bidangstudi varchar(30)

3 Buat 4 class java yang melakukan query ke3. Buat 4 class java yang melakukan query kedatabase Guru:

1 GuruConnection java1. GuruConnection.java2. GuruInsert.java3 GuruRead java3. GuruRead.java4. GuruUpdate.java5 GuruDelete java5. GuruDelete.java

3. Buat 1 class MenuUtama dan 4 class java GUI l k k k d b Gyang melakukan query ke database Guru:

1. GuruInsertUI.java2 G R dUI j2. GuruReadUI.java3. GuruUpdateUI.java4 G D l t UI j4. GuruDeleteUI.java5. MenuUtama.java

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