一文帶你了解Java設(shè)計(jì)模式之原型模式

第一文帶你了解Java設(shè)計(jì)模式之原型模式oos=newObjectOutputStream(bos);

oos.writeObject(this);//當(dāng)前這個(gè)對(duì)象以對(duì)象流的方式輸出

//反序列化

bis=newByteArrayInputStream(bos.toByteArray());

ois=newObjectInputStream(bis);

SheepcopyObj=(Sheep)ois.readObject();

returncopyObj;

}catch(Exceptione){

//TODO:handleexception

e.printStackTrace();

returnnull;

}finally{

//關(guān)閉流

try{

bos.close();

oos.close();

bis.close();

ois.close();

}catch(Exceptione2){

//TODO:handleexception

System.out.println(e2.getMessage());

Main

/**

*深復(fù)制

*@authorPromsing(張有博)

*@version1.0.0

*@since2025/9/3-15:38

publicclassDeepClient{

publicstaticvoidmain(String[]args)throwsCloneNotSupportedException{

Sheepsheep=newSheep("黑",90,"heisee");

sheep.setHouse(newHouse());

Sheepclone=(Sheep)sheep.deepClone();

System.out.println("原本的對(duì)象");

System.out.println(sheep);

System.out.println(sheep.getHouse());

System.out.println("克隆的對(duì)象");

System.out.println(clone);

System.out.println(clone.getHouse());

拓展

Spring使用原型模式：@scope(prototype)

publicstaticvoidmain(String[]args)throwsIOException{

//new一個(gè)容器

AnnotationConfigWebApplicationContextcontext=

newAnnotationConfigWebApplicationContext();

System.out.println("runsuccess");

OrderServicebean=context.getBean(OrderService.class);

//根據(jù)getBean點(diǎn)進(jìn)去

publicTTgetBean(ClassTrequiredType)throwsBeansException{

assertBeanFactoryActive();

returngetBeanFactory().getBean(requiredType);

publicObjectgetBean(Stringname)throwsBeansException{

returndoGetBean(name,null,null,false);

后續(xù)走到了。AbstractBeanFactory類中的doGetBean方法中里邊代碼做判斷mbd.isPrototype()

protectedTTdoGetBean(

Stringname,@NullableClassTrequiredType,@NullableObject[]args,booleantypeCheckOnly)

throwsBeansException{

StringbeanName=transformedBeanName(name);

Objectbean;

//Eagerlychecksingletoncacheformanuallyregisteredsingletons.

ObjectsharedInstance=