“mapping.getInputForward()”是什么时候？用过的？
我想知道 mapping.getInputForward() 在 Struts 中做什么。 API 表示它创建并返回一个与 Action 的输入相对应的 ActionForward。
但我不明白这是什么意思。有人能给我解释得更清楚吗？我可以用这个方法返回上一页吗？如果可以的话，我该怎么做？
I would like to know what mapping.getInputForward() does in Struts. The API says that it creates and returns an ActionForward that corresponds to the input of the Action.
But I don't understand what this means. Could anybody explain to me more clearly? Can I use this method to return to the previous page? And if I can, how do I do this?
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getInputForward()正如它所说的那样：它返回一个与操作的input属性值相对应的ActionForward。您可能不想将其用作一般的“返回上一页”，因为这没有任何意义。它通常在“手动”调用验证并且出现验证错误时使用；
input值将是表单页面。在这些情况下，它类似于“返回上一页”，但有所不同，因为它通常是到表单 JSP 的转发（而不是重定向）。也就是说，它只是一个普通的
findForward，但用于操作的input页面。getInputForward()does precisely what it says it does: it returns anActionForwardcorresponding to the action'sinputattribute value.You probably wouldn't want to use it as a general "return to previous page", because that wouldn't make any sense. It's commonly used when calling validation "by hand" and there's a validation error; the
inputvalue would be the form page. In those cases it's similar to "return to previous page", but different, because it's generally a forward (not a redirect) to the form JSP.That said, it's just a normal
findForwardbut for the action'sinputpage.