通过工厂模式返回Spring Bean方法解析

import java.util.Map;
public class BingServiceFactory {
  //Map中的Value是 ServiceBean
  private Map<String, BingService> serviceMap;
  //返回对应的 Service
  public BingService getBingService(String platform) {
    return serviceMap.get(platform);
  }
  public Map<String, BingService> getServiceMap() {
    return serviceMap;
  }
  public void setServiceMap(Map<String, BingService> serviceMap) {
    this.serviceMap = serviceMap;
  }
}

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.annotation.Resource;
import java.util.HashMap;
import java.util.Map;

@Configuration
public class BingConfiguration {
  @Resource
  private OneServiceImpl oneService;

  @Resource
  private TwoServiceImpl twoService;

  @Resource
  private TestServiceImpl testService;

  @Bean
  public BingServiceFactory createFactory() {
    BingServiceFactory factory = new BingServiceFactory();

    Map<String, BingService> serviceMap = new HashMap<>();
    serviceMap.put("One",oneService);
    serviceMap.put("Two",twoService);
    factory.setServiceMap(serviceMap);
    testService.setFactory(factory);
    return factory;
  }
}

import org.springframework.stereotype.Component;
@Component
public class TestServiceImpl {
  private BingServiceFactory factory;
  public void test() {
    BingService service = factory.getBingService("One");
  }
  public BingServiceFactory getFactory() {
    return factory;
  }
  public void setFactory(BingServiceFactory factory) {
    this.factory = factory;
  }
}