Cookie concept: A small piece of text information sent by the cookie server to the browser.
We can call the request.getCookies() method to obtain an array of javax.servlet.http.Cookie objects, then traverse the array, and finally use the getName() method and getValue() method to obtain The name and value of each cookie.
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The specific code is:
However, This method can only obtain cookies in its own domain, that is, cookies in the localhost domain, and cannot obtain cookies in other domains.
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