public class CreateXmlAction extends HttpServlet {

private ServletConfig config;
    public void init(ServletConfig config) throws ServletException {
        this.config = config;
    }

public void doPost(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
  String  filePath = config.getServletContext().getRealPath("/");
 }

}

 

或者直接在继承了HttpServlet的Servlet中写：

Java代码 String  filePath=this.getServletConfig().getServletContext().getRealPath(“/”); 

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