Question

HttpRequest.headers["token"]=token这边是个什么用法呢

括号里面的token和括号外卖的有什么意思呢？

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Answer 1

有headers（String s)这个方法吗？是不是getHeaders(java.lang.String name) ？
getHeaderNames
public java.util.Enumeration getHeaderNames()

Returns an enumeration of all the header names this request contains. If the
request has no headers, this method returns an empty enumeration.
Some servlet containers do not allow do not allow servlets to access headers
using this method, in which case this method returns null
Returns:
an enumeration of all the header names sent with this request; if the
request has no headers, an empty enumeration; if the servlet container does not
allow servlets to use this method, null