Introduction to the Java Framework Spring

First, elaborated:

IoC: We used to write the framework although we have layered, web, business layer, persistence layer. But the relationships between the layers. The coupling is high, when the layer calls the other layer, the object of the class of the new corresponding layer is needed, so we need to change the call of each layer when we make the modification later.

The coupling is relatively high and is not conducive to maintenance.

And Spring proposes an IOC way to manage the resources of each layer.

Ioc:inverse of control (inversion of controls), which is the instance of each resource, is given to the spring framework.

The underlying is also through the Factory mode, through the configuration file, each layer of the resources needed to inject into each layer. The development of this way is the mainstream of the current development mode.

New and Old comparisons:

Old:

Introduction to the Java Framework Spring