用于创建重复的对象，同时又能保证性能。通俗的讲，原型模式就是克隆对象，直接copy字节码，不走构造方法，性能非常高。ORM中经常用到。

注意

只支持9种数据类型的深拷贝： 8大基本类型（int long float double boolean char short byte ）+String 其他(List等)数据类型默认都是浅拷贝，但是我们也能通过他们自身的clone方法来深拷贝。

        List list = new ArrayList();List cloneList = (List) ((ArrayList) list).clone();
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Prototype.java

实现Cloneable接口，并且重写clone()方法。

public class Prototype implements Cloneable{@Overrideprotected Object clone() throws CloneNotSupportedException {return super.clone();}
}
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注:如果不实现该接口而直接调用clone()方法会抛出CloneNotSupportedException异常

PeoplePrototype.java

人原型，用来做被拷贝的对象。

public class PeoplePrototype extends Prototype{private int age;private String name;public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}
}
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Main.java

public class Main {public static void main(String[] args) {PeoplePrototype prototype = new PeoplePrototype();prototype.setAge(20);prototype.setName("FantJ");try {PeoplePrototype clone = (PeoplePrototype)prototype.clone();System.out.println(clone.getAge());System.out.println(clone == prototype);System.out.println(clone+"    "+prototype);System.out.println(clone.getClass()  +"     "+ prototype.getClass());} catch (CloneNotSupportedException e) {e.printStackTrace();}}
}
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控制台打印:

20
false
com.fantj.prototype.ConcretePrototype@6d6f6e28    com.fantj.prototype.ConcretePrototype@135fbaa4
class com.fantj.prototype.ConcretePrototype     class com.fantj.prototype.ConcretePrototype
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