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最近在写一个功能时，一个接口有多个实现，要求在service实现类的调用要根据配置文件进行调整，不同的配置，调用不同的处理方式，下面就写个例子，做一下记录吧
首先，做好yaml文件的配置
my-config: #集成方式：轮询polling/回调callback integrate-mode: polling
创建service接口类
public interface MyTransService { void dealFile(String filePath); }
创建两种类，实现上诉接口，在加@Service注解的时候，添加上这个实现类的实例名
轮询方式
@Service("polling") public class OfficeTransServiceImpl implements
MyTransService { @Override void dealFile(String filePath){ // do something ···
} }
回调方式
@Service("callback") public class PoiTransServiceImpl implements
MyTransService { @Override void dealFile(String filePath){ // do something ···
} }
接下来就是怎么调用啦
调用的话使用的是@Resource注解，这个注解的name属性，可以取到配置文件中的值
@Service public class MyServiceImpl { @Resource(name =
"${my-config.integrate-mode}") private MyTransService myTransService ; public
void dealFile() { officeTransService.dealFile(); } }
这样，就能够根据具体的配置，控制具体调用哪个实现啦！
PS
:@Resource除了读取配置文件这种方式去决定调用哪个类，还可以将配置写死，如果不需要根据配置去改变，可以使用下面两种方式，但是要切换的话就要通过改代码来实现了:
方式一：@Resource(name="polling")
方式二:@Autowired @Qualifier("polling")
对你有帮助就点个赞呗~~
