MySQL

package de.killerchecker.lm.mysql;

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

public class MySQL{

	private String HOST = "";
	private String DATABASE = "";
	private String USER = "";
	private String PASSWORD = "";

	private Connection con;

	public MySQL(String host, String database, String user, String password){
		this.HOST = host;
		this.DATABASE = database;
		this.USER = user;
		this.PASSWORD = password;

		connect();
	}

	public void connect() {
		try {
			con = DriverManager.getConnection("jdbc:mysql://" + HOST + ":3306/" + DATABASE + "?autoReconnect=true", USER, PASSWORD);
			System.out.println("[MySQL] Verbindung zur MySQL wurde hergestellt");
		} catch (SQLException e) {
			System.out.println("[MySQL] Verbindung zur MySQL ist fehlgeschlagen! Fehler: " + e.getMessage());
		}
	}

	public void close(){
		try {
			if(con != null){
			con.close();
			System.out.println("[MySQL] Verbindung zur MySQL wurde erfolgreich beendet");
			}
		} catch (SQLException e) {
			System.out.println("[MySQL] Verbindung zur MySQL beenden ist fehlgeschlagen! Fehler: " + e.getMessage());
		}
	}

	public void update(String qry){
		try {
			java.sql.Statement st = con.createStatement();
			st.executeUpdate(qry);
			st.close();
		} catch (SQLException e) {
			connect();
			System.err.println(e);
		}
	}

	public ResultSet query(String qry){
		ResultSet rs = null;

		try {
			java.sql.Statement st = con.createStatement();
			rs = st.executeQuery(qry);
		} catch (SQLException e) {
			connect();
			System.err.println(e);
		}
		return rs;
	}
}