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No answer found! So why can't I get pageContext in webwork action? ?

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Post time: 2020-2-14 17:30:02
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I use
PageContext pageContext = ServletActionContext.getPageContext ();
The obtained pageContext is null, how can I solve it?
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Post time: 2020-4-14 08:00:01
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Get it from the request
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Post time: 2020-4-14 08:30:01
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request
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