Spring配置通过动态工厂方法创建的bean

创建的类

package com.neuedu.bean;

import java.util.HashMap;
import java.util.Map;

public class InstanceFactory {
    private  Map<String,Book> map=null;
    {
        map=new HashMap<String,Book>();
        map.put("book1",new Book("asdas", 20.0));
        map.put("book2", new Book("cxvxcv", 110.3));
    }
    
    public Book getBook(String id) {
        return map.get(id);
    }

}

applicationContext.xml中的配置

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