工厂模式的一个简单实现

public class TestFactory {      /**      *      */     private static Map<String, TestInterface> beanMap = ContextUtil.getContext().getBeansOfType(TestInterface.class, false, false);      public static TestInterface getInstance(String infType) {         TestInterface curInstance = null;         for (String beanName : beanMap.keySet()) {             TestInterface instance = beanMap.get(beanName);             if (instance.getType() == null)                 throw new RuntimeException("接口实现类类型不可以为空");             else {                 if (infType.equals(instance.getType())) {                     curInstance = instance;                     break;                 }             }         }         return curInstance;     } }

根据Spring上下文得到某个接口的实现类。

public class ContextUtil implements ApplicationContextAware {      private static ApplicationContext context;      @Override     public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {         ContextUtil.context = applicationContext;     }      public static ApplicationContext getContext() {         return context;     } }

public interface TestInterface<T> {      String getType();      void testFunc(T t); }

public class TestInterfaceImpl implements TestInterface<String> {     @Override     public String getType() {         return "1";     }      @Override     public void testFunc(String s) {         System.out.println("TestInterfaceImpl -- 01");     } }

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