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Java Programming How to Use Java DataBase Connectivities JDBC Incheon Paik... Simple Database student studentID Name Email major Design registration SID call_num course call_number name

Java Programming

How to Use Java DataBase Connectivities (JDBC)

Incheon Paik

„ Simple SQL

„ Creating Table

„ Insert Data

„ Select Data

„ Accessing Data Using JDBC

Simple Database

student

studentID Name Email major

Design

registration

SID call_num

course

call_number name teacher semester

Database Table Creation

SQL Statement

CREATE TABLE student (

studentID INT NOT NULL AUTO_INCREMENT PRIMARY KEY,

name VARCHAR(30) NOT NULL,

email VARCHAR(45),

major VARCHAR(15)

);

CREATE TABLE course (

call_number INT NOT NULL PRIMARY KEY,

name VARCHAR(25) NOT NULL,

teacher VARCHAR(30),

semester VARCHAR(10) NOT NULL

);

Database Table Creation (Running Screen)

Table Structure

Insert & Select Data

Select Data

Use JDBC

import java.sql.*;

import java.io.*;

// This example is running with MySql

public class MyTest{

public static void main(String[] args){

String url =

"jdbc:mysql://localhost/paikic?useUnicode=true&characterEncoding=EUC_JP";

String query = "select * from course";

Connection myCon = null;

Statement stmt = null;

try{

Class.forName("org.gjt.mm.mysql.Driver");

}catch(ClassNotFoundException e){

System.err.println("Class Load Error");

System.err.println(e.getMessage());

} try{

System.out.println("Trying to connect ");

myCon = DriverManager.getConnection(url,"root", "sccp2002");

stmt = myCon.createStatement();

ResultSet rs = stmt.executeQuery(query);

while(rs.next()){

String col1 = rs.getString(1);

String col2 = rs.getString(2);

String col3 = rs.getString(3);

String col4 = rs.getString(4);

System.out.println(" " + col1 + " : " + col2 + " : " + col3 + " : " + col4);

} rs.close(); stmt.close(); myCon.close();

} catch(SQLException e){

System.out.println("MY" + url+" : ");

System.err.println(e.getMessage()+e.toString());

} }

}

Use JDBC (Running Screen)