/**
*
* Returns the name of the HTTP method with which this
* request was made, for example, GET, POST, or PUT.
* Same as the value of the CGI variable REQUEST_METHOD.
*
* @return a <code>String</code>
* specifying the name
* of the method with which
* this request was made
*
*/
public String getMethod();
请问HttpServletRequest中的这个方法是如何拿到请求方法的类型的,比如是get还是post