容器工厂（原型&单例）

public class Definition {
    //bean的唯一标识
    private String id;
    //bean的完整类名
    private String className;
    //bean的创建方式
    private String scope = "singleton";

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getClassName() {
        return className;
    }

    public void setClassName(String className) {
        this.className = className;
    }

    public String getScope() {
        return scope;　　
    }

    public void setScope(String scope) {
        this.scope = scope;
    }
}

public class ContainerFactoryTwo {
    //单例的容器(Singleton)
    private static Map<String,Object> singleton = new HashMap<String,Object>();

    //原型的容器（prototype）
    private static Map<String,Definition> prototype = new HashMap<String,Definition>();

    //初始化
    public ContainerFactoryTwo(String resourcePath){
        initPrototype(resourcePath);
        initSingleton();
    }

    public void initPrototype(String resourcePath){
        //创建SAX解析器
        SAXReader reader = new SAXReader();

        try {
            Document document = reader.read(Thread.currentThread().getContextClassLoader().getResourceAsStream(resourcePath));
            Element root = document.getRootElement();
            List<Element> list = root.elements();
            for (Element e:list){
                String id = e.attributeValue("id");
                String className = e.attributeValue("class");
                String scope = e.attributeValue("scope");
                //构建bean的定义
                Definition def = new Definition();
                def.setId(id);
                def.setClassName(className);
                if(scope!=null){
                    def.setScope(scope);
                }
                prototype.put(id,def);
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * 初始化单利容器
     */

    private void initSingleton(){
        //遍历prototype里面的值做出判断
        for (String key : prototype.keySet()) {
            Definition def = prototype.get(key);
            //如果是判断是否是singleton
            if("singleton".equals(def.getScope())){
                try {
                    //将实例化对象保存到singleton的map里
                    singleton.put(key, Class.forName(def.getClassName()).newInstance());
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        }
    }
    public Object getBean(String name){
        return getContainerBean(name);
    }

    public <T> T getBean(String name, Class<T> clazz){
        return (T)getContainerBean(name);
    }


    private Object getContainerBean(String name){
        //获取作用域属性
        String scope = prototype.get(name).getScope();
        try {
            //三目运算，singleton在scope里面？是的话就之前前者（K对应的已经是一个Object对象）否则执行后者，通过类加载返回一个对象
            return ("singleton".equals(scope))?singleton.get(name):
                    Class.forName(prototype.get(name).getClassName()).newInstance();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

}

public class Main {
    public static void main(String[] args) {
        //创建工厂
        ContainerFactoryTwo factory = new ContainerFactoryTwo("beans.xml");

        Phone phone1 = factory.getBean("OppoPhone", Phone.class);//singleton
        Phone phone2 = factory.getBean("OppoPhone", Phone.class);//singleton

        Pad pad1 = (Pad) factory.getBean("OppoPad", Pad.class);//prototype
        Pad pad2 = (Pad) factory.getBean("OppoPad", Pad.class);//prototype
        System.out.println(phone1==phone2);
        System.out.println(pad1==pad2);
        //phone1.call();
    }
}