序列化 反射破坏单例模式

public class Singleton implements Serializable{

/**
 * 
 */
private static final long serialVersionUID = 1L;
private static Singleton instance;

private Singleton(){
    System.out.println("构造方法执行");
}

public static synchronized Singleton getInstance(){
    if (null == instance) {
        instance = new Singleton();
    }
    return instance;
}

public Object readResolve(){
    return instance;
}

}

以上为测试单例模式
反射破坏单例模式:
public class ReflectSingleton {
public static void main(String[] args) {
try {
Class