The transition diagram also includes input symbols (in this case XML tags) and a transition function that controls how input symbols modify the state.
转换图还包含 输入符号（在本例中为 XML 标记）和控制输入符号如何修改状态的 转换函数。
We will need an implementation that extends org.apache.struts.action.Action for each of the actions identified in our state transition diagram and defined in struts-config.xml.
对于在状态转换图中标出的并在struts - config . xml中定义的每个操作，我们需要一个继承org . apache . struts . action . action的实现。
This is actually a state-transition diagram in which each valid state is well-defined, and a specific activity has to be performed in order to move from one state to the next.
这实际上是一个状态转换图，其中定义了所有有效状态，为了从一个状态转移到下一个状态，必须执行特定的活动。
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