code: public String importData() {
      TransferResult tr = new TransferResult();
      EntityImporter importer = buildEntityImporter();
      if (null == importer) { return forward("/components/importData/error"); }
      try {
        configImporter(importer);
        importer.transfer(tr);
        put("importer", importer);
        put("importResult", tr);
        if (tr.hasErrors()) {
          return forward("/components/importData/error");
        } else {
          return forward("/components/importData/result");
        }
      } catch (IllegalImportFormatException e) {
        tr.addFailure(getText("error.importformat"), e.getMessage());
        put("importResult", tr);
        return forward("/components/importData/error");
      }
    }
docs: 导入信息