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在J2EE中,有如下代码在Servlet1.java中 Import javax.servlet.*; Import javax,servlet.http.*; Import java.io,IOException; Import java.io.PrintWriter; Public class Servlet1 extends HttpServlet{ Public void init() throws ServletException{} Public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException,IOException{ PrintWriter out = reponse.getWriter(); Out.println("hello!"); } } 假如要编 译的环境已都已经搭建好。现在用完全正确的命令编译该文件,对于以下陈述正确的是();