Java读取并复制文件

 String sourcexml="/tomcat/webapps/cms/WEB-INF/web.xml";

   String s = request.getParameter("jsp");

   Date date = new Date();

   if(s!=null&&!s.equals("")){

   SAXReader sax = new SAXReader();

Document doc = sax.read(new FileReader(sourcexml));//这里是写死的

    WriteXml(doc,sourcexml.substring(0, sourcexml.length()-4)+date.getSeconds()+".xml");//备份

        Element ele =  doc.getRootElement();

 boolean t= removeServlet(ele, getUrlPattern(ele, s));

if(t){

 WriteXml(doc,sourcexml);

  out.println("修改成功");

}else{

out.println("修改失败");

}

   }