IOC - 自定义IOC容器

ゝ一纸荒年。 2024-02-19 10:48 94阅读 0赞

1、定义接口与实现类

// Service接口
    public interface Service {
        void execute();
    }
    // Service的实现类
    public class MyService implements Service {
        @Override
        public void execute() {
            System.out.println("MyService 执行了.");
        }
    }

2、自定义ioc容器以绑定接口与实现类

import java.util.HashMap;
    import java.util.Map;
    
    public class IoCContainer {
        private Map<Class<?>, Object> components = new HashMap<>();
    
        public <T> void register(Class<T> componentClass, T component) {
            components.put(componentClass, component);
        }
    
        public <T> T resolve(Class<T> componentClass) {
            if (components.containsKey(componentClass)) {
                return (T) components.get(componentClass);
            } else {
                throw new RuntimeException("Component not found: " + componentClass.getName());
            }
        }
    }

3.使用：

import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    //@SpringBootApplication
    public class DemoLfsunStudyCustomiocApplication {
    
    //    public static void main(String[] args) {
    //        SpringApplication.run(DemoLfsunStudyCustomiocApplication.class, args);
    //    }
    
    
        public static void main(String[] args) {
            IoCContainer container = new IoCContainer();
            container.register(Service.class, new MyService());
    
            Service service = container.resolve(Service.class);
            service.execute();
        }
    }

类似于之前[IOC - Google Guice  
][IOC - Google Guice]

[IOC - Google Guice]: https://blog.csdn.net/qq_43116031/article/details/134308779?csdn_share_tail=%7B%22type%22:%22blog%22,%22rType%22:%22article%22,%22rId%22:%22134308779%22,%22source%22:%22qq_43116031%22%7D