配置通过静态工厂方法创建的bean ， 配置通过实例工厂方法创建的bean ， 配置FactoryBean★

实验15：配置通过静态工厂方法创建的bean[通过静态方法提供实例对象，工厂类本身不需要实例化！]

<bean id="staticFactory" class="com.neuedu.spring.bean.StaticFactory" factory-method="getBook">
<constructor-arg value="book1"></constructor-arg>
</bean>

private static Map<String,Book> map =null;
static{
map=new HashMap<String,Book>();
map.put("book1", new Book("斗罗大陆", "唐三", 29.9));
map.put("book2", new Book("斗破苍穹", "唐四", 30.9));
map.put("book3", new Book("绝世唐门", "唐五", 31.9));
map.put("book4", new Book("龙王传说", "唐六", 32.9));

}

private static Book getbookid(String id) {
return map.get(id);
}

 

实验16：配置通过实例工厂方法创建的bean[通过实例方法提供实例对象，工厂类本身需要先创建对象！]

<bean id="instanceFactory" class="com.neuedu.spring.bean.InstanceFactory"></bean>
<bean id="bookFromInstanceFactory" factory-bean="instanceFactory" factory-method="getBook">
<constructor-arg value="book1"></constructor-arg>
</bean>

private Map<String,Book> map =null;
{
map=new HashMap<String,Book>();
map.put("book1", new Book("斗罗大陆", "唐三", 29.9));
map.put("book2", new Book("斗破苍穹", "唐四", 30.9));
map.put("book3", new Book("绝世唐门", "唐五", 31.9));
map.put("book4", new Book("龙王传说", "唐六", 32.9));

}

private Book getbookid(String id) {
return map.get(id);
}

实验17：配置FactoryBean★

<bean id="Myfactory" class="com.factory.MyFactoryBean"></bean>

public class MyFactoryBean implements FactoryBean<Book> {

@Override
public Book getObject() throws Exception {
return new Book("lisi", "lisi", 789);
}

@Override
public Class<?> getObjectType() {
return Book.class;
}

@Override
public boolean isSingleton() {
return false;
}

}

 

测试方法

@Test
public void test() {
ApplicationContext ioc=new ClassPathXmlApplicationContext("applictionContext.xml");
Object bean = ioc.getBean("staticFactory");
System.out.println(bean);
Object bean1 = ioc.getBean("beanFromFactory");
System.out.println(bean1);
Object bean11 = ioc.getBean("Myfactory");
System.out.println(bean11);
}