import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
try {
Class.forName("com.mysql.jdbc.Driver");
Connection connection = DriverManager.getConnection(url, username, password);
} catch (Exception e) {
e.printStackTrace();
}
try {
Statement statement = connection.createStatement();
String sql = "SELECT * FROM mytable";
ResultSet resultSet = statement.executeQuery(sql);
while (resultSet.next()) {
int id = resultSet.getInt("id");
String name = resultSet.getString("name");
// ...
}
resultSet.close();
statement.close();
} catch (Exception e) {
e.printStackTrace();
}
String sql = "INSERT INTO mytable (name, age) VALUES ('John', 25)";
statement.executeUpdate(sql);
String sql = "UPDATE mytable SET age = 26 WHERE name = 'John'";
statement.executeUpdate(sql);
String sql = "DELETE FROM mytable WHERE name = 'John'";
statement.executeUpdate(sql);
connection.close();
