Jsp后台取得网址

// 输出：http://localhost:8080/project/PayOrder.do
		logger.error("-------------- " + request.getRequestURL().toString()); 
// 输出：/PayOrder.do
		logger.error("-------------- " + request.getServletPath()); 
// 输出网址：http://localhost:8080/project
		logger.error("-------------- " + request.getRequestURL().toString().split(request.getServletPath())[0]);