Java httpservletrequest getCookies() 或 getHeader()
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httpservletrequest getCookies() or getHeader()
提问by Yan Khonski
I want to accept data from a client. What are the pros and cons of each approach?
我想接受来自客户的数据。每种方法的优缺点是什么？
HttpServletRequest request = retriveRequest();
Cookie [] cookies = request.getCookies();
for (Cookie cookie : cookies) {
if ("my-cookie-name".equals(cookie.getName())) {
String value = cookie.getValue();
//do something with the cookie's value.
}
}
or
或者
String request.getHeader("header-name");
As I read How are cookies passed in the HTTP protocol?
正如我所读到的，cookie 是如何在 HTTP 协议中传递的？
Cookies are passed as HTTP headers, both in the request (client -> server), and in the response (server -> client).
Cookie 在请求（客户端 -> 服务器）和响应（服务器 -> 客户端）中作为 HTTP 标头传递。
采纳答案by Optional
getCookies, frees you from parsing the Cookie header string, and creating a java object out of it. Otherwise you will have to do something like:
getCookies，使您无需解析 Cookie 标头字符串，并从中创建一个 java 对象。否则，您将不得不执行以下操作：
String rawCookie = request.getHeader("Cookie");
String[] rawCookieParams = rawCookie.split(";");
for(String rawCookieNameAndValue :rawCookieParams)
{
String[] rawCookieNameAndValuePair = rawCookieNameAndValue.split("=");
}
// so on and so forth.
