Antlr Can'；找不到模板StringTemplate

我正在尝试在google app engine中创建wiki应用程序。我正在使用字符串模板。但我不理解模板文件的层次结构

这是代码

• 完成必要的导入

  public class Add extends HttpServlet{
  
  protected void doPost(HttpServletRequest req, HttpServletResponse resp)
      throws ServletException, IOException {
  // TODO Auto-generated method stub
  //super.doPost(req, resp);
  DatastoreService datastoreService = DatastoreServiceFactory.getDatastoreService();
  
  String title = req.getParameter("title");
  Entity articleEntity = new Entity("Article", normalize(title));
  articleEntity.setProperty("title", title);
  
  UserService userService = UserServiceFactory.getUserService();
  User user = userService.getCurrentUser();
  if(user != null){
      String author = user.getNickname();
      articleEntity.setProperty("author", author);
  }else{
      String author = "Anonymous";
      articleEntity.setProperty("author", author);
  }
  
  String content = req.getParameter("content");
  Text myContent = new Text(content);
  articleEntity.setProperty("content", myContent);
  
  datastoreService.put(articleEntity);
  
  resp.sendRedirect("index.jsp");
   }
  
    private String normalize(String str){
  String trimmedLower = str.toLowerCase().trim();
  String urlReady = trimmedLower.replace(" ", "-");
  return urlReady;
  }
  
  }
  

这是目录结构。

我得到了这个错误

HTTP ERROR 500

Problem accessing /page. Reason:

Can't find template retrieve-article.st; group hierarchy is [xhtml]

原因：

java.lang.IllegalArgumentException: Can't find template retrieve-article.st; group hierarchy is [xhtml]
at       org.antlr.stringtemplate.StringTemplateGroup.lookupTemplate(StringTemplateGroup.java:507)
at org.antlr.stringtemplate.StringTemplateGroup.getInstanceOf(StringTemplateGroup.java:392)
at org.antlr.stringtemplate.StringTemplateGroup.getInstanceOf(StringTemplateGroup.java:404)
at in.isuru.wiki.Page.doGet(Page.java:42)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:35)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:60)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:122)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:97)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:78)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:362)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)

---

由Jetty提供动力：//

尝试避免模板名称中的“-”。 Ter

我还发现，路径中的“.”也导致它找不到文件。