如何从Spring获取实例化的bean列表? [英] How can I get a list of instantiated beans from Spring?

问题描述

我在Spring上下文中有几个具有状态的bean，所以我想在单元测试之前/之后重置该状态.

I have several beans in my Spring context that have state, so I'd like to reset that state before/after unit tests.

我的想法是向助手类添加一个方法，该方法仅遍历Spring上下文中的所有bean，检查用@Before或@After注释的方法并调用它们.

My idea was to add a method to a helper class which just goes through all beans in the Spring context, checks for methods that are annotated with @Before or @After and invoke them.

如何从ApplicationContext获取实例化的豆的列表?

注意:仅迭代所有定义的bean的解决方案是没有用的，因为我有很多惰性bean，并且其中一些不能被实例化，因为这在某些测试中会失败(即，我有一个需要java.sql.DataSource的bean，但是测试有效，因为他们不需要那个bean.

Note: Solutions which simply iterate over all defined beans are useless because I have many lazy beans and some of them must not be instantiated because that would fail for some tests (i.e. I have a beans that need a java.sql.DataSource but the tests work because they don't need that bean).

推荐答案

例如:

 public static List<Object> getInstantiatedSigletons(ApplicationContext ctx) {
            List<Object> singletons = new ArrayList<Object>();

            String[] all = ctx.getBeanDefinitionNames();

            ConfigurableListableBeanFactory clbf = ((AbstractApplicationContext) ctx).getBeanFactory();
            for (String name : all) {
                Object s = clbf.getSingleton(name);
                if (s != null)
                    singletons.add(s);
            }

            return singletons;

    }

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