入门servlet：request获取请求行数据

/**
 * 演示Request对象获取请求行数据
 */
@WebServlet("/test")
public class RequestDemo1 extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //一、获取请求行
        //1.获取请求方式：GET
        String method = request.getMethod();
        System.out.println(method);
        //2.（*）获取虚拟目录：/request
        String contextPath = request.getContextPath();
        System.out.println(contextPath);
        //3.获取Servlet路径：/demo
        String servletPath = request.getServletPath();
        System.out.println(servletPath);
        //4.获取get方式请求参数：name=zhangshan
        String queryString = request.getQueryString();
        System.out.println(queryString);
        //5.（*）获取请求URI：/request/demo
            //* String getRequestURI（）： /request/demo
        String requestURI = request.getRequestURI();
        System.out.println(requestURI);
        //* StringBuffer getRequestURI（）：http：//localhost/request/demo
        StringBuffer requestURL = request.getRequestURL();
        System.out.println(requestURL);
        //6.获取协议及版本：HTTP/1.1
        String protocol = request.getProtocol();
        System.out.println(protocol);
        //7.获取客户机的IP地址：
            //*String getRemoteAddr（）
        String remoteUser = request.getRemoteUser();
        System.out.println(remoteUser);
    }
}