beanscontants.java

23种GOF模式的java代码实现

package org.gof.structure.facade;

public class BeansContants {
  public String dbdriver;
  public String dburl;
  public String dbpwd;

  private static BeansContants instance = null;

  public static synchronized BeansContants getInstance() {

    if (instance == null) {
      instance = new BeansContants();
    }
    return instance;
  }

}