这个Bean的Spring的bean.xml文件我该怎么写？：报错

下面这个类的配置文件该如何写？

public class ConnectionFactory {
	private static  ConnectionFactory instance = null;

	private ConnectionFactory() {
		System.out.println("ConnectionFactory的构造方法被调用了！");
	}
	public static ConnectionFactory getInstance() {
		if (instance == null) {
			synchronized (ConnectionFactory.class) {
				if (instance == null) {
					instance = new ConnectionFactory();
				}
			}
		}
		return instance;
	}
	public void  getConnection() {
		System.out.println("ConnectionFactory的getConnection方法被调用了！");
	}
	public void free(Connection conn, Statement st, ResultSet rt) {
		System.out.println("ConnectionFactory的free方法被调用了！");
		System.out.println(conn);
		System.out.println(st);
		System.out.println(rt);
	}
}