Controller Servlet的意思|示意

In the J2EE Model 2 architecture, a servlet is the UI controller, responsible for getting input data, calling some back-end business logic, and then deciding what JSP to forward to.

在J2EE Model 2体系结构中，Servlet是UI控制器，负责获取输入数据，调用某些后端的业务逻辑，然后决定转发到哪一个JSP。

The Controller — Life cycle events and servlet filters

Controller —— 生命周期事件和 servlet 过滤器

In the middle of the SQD is the reservation servlet, which is a controller that knows the steps that have to be carried out to allow a customer to reserve a vehicle.

在序列图的中间是预约servlet，作为控制器它掌握客户预约车辆时需要执行的所有步骤。

The servlet acts in the role of a controller, coordinating the steps needed to carry out the work of the Reserve a Vehicle use case.

该servlet以控制器的角色出现，协调预约车辆用例工作中需要完成的各个步骤。

The Controller is made up of the JSF layer with servlet listeners and filters that are unrelated to JSF but enhance the functionality of the Web application.

Controller是由jsf层及servlet侦听器和servlet过滤器组成，servlet侦听器和servlet过滤器与JSF无关，但增强了Web应用程序的功能。

This will pass execution on through to the servlet controller to the session bean on to the entity bean.

这将使执行转移到 servlet 控制器，然后转到会话 bean，再转到实体 bean。