uniquename.java

来自「java 小型系统连接池参照适用于中小型网站」· Java 代码 · 共 38 行

package ntis.com.util;

import java.util.Date;

public class UniqueName {
  private static UniqueName uniqueName = null;

  private String dateString = "";
  private int sequencer = 0;

  private UniqueName() {}

  public static UniqueName getInstance() {
    if(uniqueName == null) {
      uniqueName = new UniqueName();
    }
    return uniqueName;
  }

  public synchronized String get() {
    Date _date = new Date(System.currentTimeMillis());
    String _dateString = _date.toString();

    if(_dateString.equals(dateString)) {
      sequencer++;
    }
    else {
      sequencer = 0;
      dateString = _dateString;
    }

    _dateString = _dateString.replace(' ', '_');
    _dateString = _dateString.replace(':', '_');

    return _dateString + "_" + Integer.toString(sequencer);
  }
}