The perform method always returns a value of type ActionForward.
perform方法经常返回类型ActionForward的一个值。
The last step in the execute method returns the instance of ActionForward, forward.
execute方法中的最后步骤返回ActionForward (forward)的实例。
Generally, this component is a JSP, but ActionForward can also point in other actions.
一般来说,这个组件是一个jsp页面,但是ActionForward也能指向其他动作。
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