Kendoui dataviz在折线图上添加数据点(Kendoui dataviz adding data points on line charts)

 是的，规范要求容器支持超类注入。 
 
 这取决于你的意思是“初始化”。 如果您自己创建MyService实例，则注入根本不起作用; MyService需要由容器创建（是servlet，CDI bean，EJB bean等）。 然后，容器显然必须做一些工作来创建一个代理对象注入到字段中，但它可能不会创建实际的bean实例。 对于无状态会话bean，在实际调用方法之前，可能无法从Bean池创建或分配实际的bean实例。 对于有状态会话bean，容器将在创建MyService时创建实例。 

Yes, the specifications require containers to support superclass injection.
 
It depends what you mean by "initialize". If you're creating MyService instances yourself, then injection won't work at all; MyService needs to be created by the container (be a servlet, CDI bean, EJB bean, etc.). Then, the container obviously must do some work to create a proxy object to inject into the field, but it might not create the actual bean instance. For stateless session beans, the actual bean instance might not be created or allocated from a bean pool until a method is actually called. For stateful session beans, the container will create an instance when MyService is created.