package Example.db;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
public class MySQL {
private Connection conn;
private Statement statmt;
private PreparedStatement preparedStatement = null;
public MySQL(String url, String dbName, String user, String pass) {
try {
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(
"jdbc:mysql://" + url + "/" + dbName + "?useUnicode=true&characterEncoding=utf8&autoReconnect=true",
user, pass);
statmt = conn.createStatement();
statmt.execute(
"CREATE TABLE IF NOT EXISTS `users` (`user` varchar(16) PRIMARY KEY,`pass` varchar(32) NOT NULL,`ip` varchar(16) NOT NULL,`time` varchar(32) NOT NULL)");
} catch (Exception e) {
e.printStackTrace();
}
}
public void insert(String user, String pass, String ip, Long time) {
try {
PreparedStatement e = conn.prepareStatement(
"INSERT INTO users (user,pass,ip,time) VALUES (?,?,?,?) ON DUPLICATE KEY UPDATE pass = ?, ip = ?, time = ?;");
e.setString(1, user);
e.setString(2, pass);
e.setString(3, ip);
e.setLong(4, time);
e.setString(5, pass);
e.setString(6, ip);
e.setLong(7, time);
e.executeUpdate();
} catch (Exception e) {
e.printStackTrace();
}
}
public ArrayList<String> select(String user) {
try {
preparedStatement = conn.prepareStatement("SELECT user,pass,ip,time FROM users WHERE user = ?;");
preparedStatement.setString(1, user);
ResultSet e = preparedStatement.executeQuery();
ArrayList<String> item = new ArrayList<String>();
if (e.next()) {
item.add(e.getString("user"));
item.add(e.getString("pass"));
item.add(e.getString("ip"));
item.add(e.getString("time"));
e.close();
return item;
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}