原型模式
1.元素类-组件类
public class Attachement implements Serializable{
private Integer id;
private BigDecimal price;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public BigDecimal getPrice() {
return price;
}
public void setPrice(BigDecimal price) {
this.price = price;
}
}
2.元素类-主类
public class Prototype implements Cloneable,Serializable{
private Integer id;
private String name;
private Attachement at;
/**
*
* @Desc: 克隆,浅克隆
* @return
* @author:zy
* @version: 2016年6月1日 下午3:16:53
*/
public Object copy(){
try {
return super.clone();
} catch (CloneNotSupportedException e) {
e.printStackTrace();
}
return null;
}
/**
*
* @Desc: 深度克隆
* @return
* @author:zy
* @version: 2016年6月1日 下午3:27:54
*/
public Prototype copyDeep(){
try {
//将对象写入流中
ByteArrayOutputStream bao=new ByteArrayOutputStream();
ObjectOutputStream oos;
oos = new ObjectOutputStream(bao);
oos.writeObject(this);
//将对象从流中取出
ByteArrayInputStream bis=new ByteArrayInputStream(bao.toByteArray());
ObjectInputStream ois=new ObjectInputStream(bis);
return (Prototype)ois.readObject();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((id == null) ? 0 : id.hashCode());
result = prime * result + ((name == null) ? 0 : name.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Prototype other = (Prototype) obj;
if (id == null) {
if (other.id != null)
return false;
} else if (!id.equals(other.id))
return false;
if (name == null) {
if (other.name != null)
return false;
} else if (!name.equals(other.name))
return false;
return true;
}
public Attachement getAt() {
return at;
}
public void setAt(Attachement at) {
this.at = at;
}
}
3.测试
实现深克隆,除了写到内存再从内存重新读取,还有一种方式,就是在引用的对象中,实现clone()方法,但是个人不是很建议,因为这样就得在每个需要深克隆的引用中实现clone()方法了。