Cookie The transmitted value can only be ASCII code , The coding table is relatively old and does not contain many symbols and words

Especially Chinese , So in cookie In the process of value transfer, it needs to be converted to the corresponding ASCII Code re analysis

as follows

URLEncoder.encode(" millet ", "utf-8")

URLDecoder.decode(value,"utf-8")

cookie It cannot be used after being disabled cookie To transmit session operation

So you have to go through url The way to deliver

response.sendRedirect(response.encodeRedirectURL(request.getContextPath()+"/some2"));

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