utmatning java - by popular demand

 
   void utmatning(){
                String sql = "SELECT * FROM `music`.`Artist`;" ;
        System.out.println(sql);
        ResultSet rs = dbs.query(sql);
        String[] array;
        while((array =dbs.fetchArray(rs)) != null){
            System.out.println(array[1] + " " + array[2]);
        }
    }

DatabasServer- java - hur du komunicerar med DB

ppackage musicdb;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
*
* @author gustafsp
*/
public class DatabasServer {

final static String server = "localhost";
final static int port = 3306;
final static String login = "root";
final static String password = "mysql";
final static String databas = "music";
private static Connection con;

public static Connection connect() {
try {
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException ex) {
System.out.println("MYSQL driver missing?");
}
//Define URL of database server for
// database named JunkDB on the localhost
// with the default port number 3306.
String url = "jdbc:mysql://" + DatabasServer.server + ":" + DatabasServer.port;
try {
//Get a connection to the database for a
// user named auser with the password
// drowssap, which is password spelled
// backwards.
con = DriverManager.getConnection(
url, DatabasServer.login, DatabasServer.password);
return con;
} catch (SQLException ex) {
System.out.println("Login Fail: password ok?");
}
return null;
}

public static ResultSet query(String sql) {
try {
if (con == null) {
con = DatabasServer.connect();
}
Statement stmt = con.createStatement();
if (stmt.execute(sql)) {
return stmt.getResultSet();
}
} catch (SQLException ex) {
Logger.getLogger(DatabasServer.class.getName()).log(Level.SEVERE, null, ex);
}
return null;
}

public static String[] fetchArray(ResultSet result) {
try {
String[] array = new String[result.getMetaData().getColumnCount()];
if (result.next()) {
for (int i = 1; i <= result.getMetaData().getColumnCount(); i++) {
                    array[i - 1] = result.getString(i);
                }
                return array;
            }
            
        } catch (SQLException ex) {
            Logger.getLogger(DatabasServer.class.getName()).log(Level.SEVERE, null, ex);
        }

    
    return null; //om fel eller inget värde
    }



}

Updatering Sökning, Urval, Statistik

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package musicdb;

import java.sql.ResultSet;
import javax.swing.JOptionPane;

/**
 *
 * @author gustafsp
 */
public class DatabasHantering {
    // min komentar
    DatabasServer dbs = new DatabasServer();

    void urval(String urval){
        String sql = "SELECT * FROM `music`.`Artist` WHERE name = '" + urval + "';" ;
        System.out.println(sql);
        ResultSet rs = dbs.query(sql);
        String[] array;
        while((array =dbs.fetchArray(rs)) != null){
            System.out.println(array[1] + " " + array[2]);
        }

    }
    void sok(String sok){
        String sql = "SELECT * FROM `music`.`Artist` WHERE name LIKE '%" +
                sok +
                "%'  ;" ;
        System.out.println(sql);
        ResultSet rs = dbs.query(sql);
        String[] array;
        while((array =dbs.fetchArray(rs)) != null){
            System.out.println(array[0] + " " + array[1] + " " + array[2]);
        }
    }
    void statistik(){
        String sql = "SELECT " +
                "sum(id) AS sum, " +
                "min(id) AS min, " +
                "max(id) AS max, " +
                "avg(id) AS avg," +
                "count(*) AS COUNT " +
                "FROM `music`.`Artist` GROUP BY Start ;" ;
        System.out.println(sql);
        ResultSet rs = dbs.query(sql);
        String[] array;
        while((array =dbs.fetchArray(rs)) != null){
            System.out.println(array[0]
                    + " " + array[1]
                    + " " + array[2]
                    + " " + array[3]
                    + " " + array[4]);
        }
    }


    public static void main(String[] args){
        DatabasHantering dh = new DatabasHantering();
        String s = JOptionPane.showInputDialog("Sök");
        System.out.println("Sök");
        dh.sok(s);
        System.out.println("Urval");
        dh.urval(s);
        System.out.println("Stat");
        dh.statistik();

    }
}

PHP - MYSQL Exempel

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title></title>
    </head>
    <body>
        <?php
        if($link = mysql_connect("localhost:3306", "root", "")) {
            echo "inloggad";
            $sql = "SELECT * FROM mysql.user LIMIT 0 , 30;";
            echo $sql;
            $result = mysql_query($sql, $link);
            if(!$result) {
                echo "noThing just a Fail";
            }else {
                while($row = mysql_fetch_array($result, MYSQL_ASSOC)) {
                    foreach($row as $value) {
                        echo $value. "";
                    }
                    echo "<br />";
                //print_r($row)
                }
            }
        }
        else {
            echo "Ej inloggad";
        }
        ?>
    </body>
</html>

Sök och urvals

package musicdb;

import java.sql.ResultSet;
import javax.swing.JOptionPane;

/**
 * @author gustafsp
 */
public class DatabasHantering {
    // min komentar
    DatabasServer dbs = new DatabasServer();

    void urval(String urval){
        String sql = "SELECT * FROM `music`.`Artist` WHERE name = '" + urval + "';" ;
        System.out.println(sql);
        ResultSet rs = dbs.query(sql);
        String[] array;
        while((array =dbs.fetchArray(rs)) != null){
            System.out.println(array[1] + " " + array[2]);
        }

    }
    void sok(String sok){
        String sql = "SELECT * FROM `music`.`Artist` WHERE name LIKE '%" +
                sok +
                "%'  ;" ;
        System.out.println(sql);
        ResultSet rs = dbs.query(sql);
        String[] array;
        while((array =dbs.fetchArray(rs)) != null){
            System.out.println(array[1] + " " + array[2]);
        }
    }
    public static void main(String[] args){
        DatabasHantering dh = new DatabasHantering();
        String s = JOptionPane.showInputDialog("Sök");
        System.out.println("Sök");
        dh.sok(s);
        System.out.println("Urval");
        dh.urval(s);

    }
}