This servlet serves as the primary entry point of all the HTTP Web service requests and delegates the request and response object instances to the request processor for further processing.
这个 servlet 作为所有 HTTP Web 服务请求的主入口点，它把请求和响应对象实例分派给请求处理器进行进一步处理。
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PHP: Hypertext Processor (PHP) is a powerful and increasingly popular server-side scripting language for creating Web content. Portability is one of the primary reasons for PHP's popularity
PHP：超文本处理器（PHP：Hypertext Processor），是一种创建 Web 内容的功能强大且越来越受欢迎的服务器端脚本语言。