求助！关于多线程连接数据库的问题

public class PoolSkimmerThread implements Runnable {

    private long timeout;
    private ObjectPool pool;


    public PoolSkimmerThread(int skimmerSecs, ObjectPool pool) {
        this.timeout = (skimmerSecs * 1000);
        this.pool = pool;
    }

    public void run() {

        for (; ;) {
            try {
                Thread.sleep(this.timeout);
            } catch (InterruptedException e) {
            }
            this.pool.cleanUp();
        }
    }

}