对于大部分人来说，次见到 class.forName(String className) 这句代码应该是在使用 JDBC 方式连接数据库的时候。
实例
import com.mysql.jdbc.Driver;
import java.sql.*;
public class JdbcDemo {
public static void main(String[] args) throws SQLException, ClassNotFoundException {
String url = "jdbc:mysql://127.0.0.1:3306/mydb";
String username = "root";
String password = "redhat";
Class.forName("com.mysql.jdbc.Driver");
Connection connection = DriverManager.getConnection(url, username, password);
String sql = "SELECT * FROM msg";
PreparedStatement prepareStatement = connection.prepareStatement(sql);
ResultSet resultSet = prepareStatement.executeQuery();
resultSet.next();
String address = resultSet.getString("address");
System.out.println(address);
}
}
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