Java 添加实例和缓存之间的区别

这两种代码有什么区别？两者产生相同的结果

带缓存：

DefaultPicoContainer cachingContainer = new DefaultPicoContainer(new OptInCaching().wrap(new ConstructorInjection()));

cachingContainer.as(Characteristics.CACHE).addComponent(Cookie.class);

Cookie cookie1 = (Cookie)cachingContainer.getComponent(Cookie.class);
Cookie cookie2 = (Cookie)cachingContainer.getComponent(Cookie.class);

assert(cookie1 == cookie2); // Same instance: OK

DefaultPicoContainer instanceContainer = new DefaultPicoContainer(new ConstructorInjection());

instanceContainer.addComponent(Cookie.class, new Cookie());

Cookie cookie3 = (Cookie)instanceContainer.getComponent(Cookie.class);
Cookie cookie4 = (Cookie)instanceContainer.getComponent(Cookie.class);

assert(cookie3 == cookie4); // Same instance: OK

添加实例：

DefaultPicoContainer cachingContainer = new DefaultPicoContainer(new OptInCaching().wrap(new ConstructorInjection()));

cachingContainer.as(Characteristics.CACHE).addComponent(Cookie.class);

Cookie cookie1 = (Cookie)cachingContainer.getComponent(Cookie.class);
Cookie cookie2 = (Cookie)cachingContainer.getComponent(Cookie.class);

assert(cookie1 == cookie2); // Same instance: OK

DefaultPicoContainer instanceContainer = new DefaultPicoContainer(new ConstructorInjection());

instanceContainer.addComponent(Cookie.class, new Cookie());

Cookie cookie3 = (Cookie)instanceContainer.getComponent(Cookie.class);
Cookie cookie4 = (Cookie)instanceContainer.getComponent(Cookie.class);

assert(cookie3 == cookie4); // Same instance: OK

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在第一种情况下，将对象实例化委托给容器，并缓存该托管实例。在第二种情况下，您将就绪实例作为Cookie类型存储在容器中

托管组件（第一种情况）将自动连接其依赖项，并且它们可能具有生命周期事件等。在大多数情况下，您应该将实例化委托给容器