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package DesignModel.Singleton;

/**

* 懒汉式

* 对象延迟加载

* */

public class Singleton {

private static Singleton singleton = null;

/**

* 私有构造方法，防止被实例化

* */

private Singleton(){}

/**

* 静态工程方法,创建实例

* */

public static Singleton getInstance(){

if (singleton == null){

synchronized (Singleton.class){

if (singleton == null){

singleton = new Singleton();

}

}

}

return singleton;

}

/**

* 如果该对象被用于序列化，可以保证对象在序列化前后保持一致 */

public Object readResolve(){

return singleton;

}

}