单选题 在J2EE中,给定某Servlet的代码如下,编译运行该文件,以下陈述正确的是( ) public class Servlet1 extends HttpServlet{ public void init( ) throws ServletException{ } public void service(HttpServletRequest request,HttpServletResponse response) ThrowsServletException,IOException{ PrintWriter out = response.getWriter( ); out.println("hello!"); } }