//Returns the part of this request's URL from the protocol name up to the query string in the first line of the HTTP request
// eg. /manage/editExam.domethod=goExamSet&type=U String url = request.getRequestURI(); //The returned URL contains a protocol, server name, port number, and server path, but it does not include query string parameters
//eg. http://127.0.0.1:8080/manage/editExam.domethod=goExamSet&type=U StringBuffer ......
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