Question

我正在尝试使用DocumentBuilder API在Blackberry应用程序中创建和编写XML。我编写了以下方法来创建至少一个元素及其属性：

  private void createResponseXML()
  {
    try
    {
      // Build a document based on the XML file.
      DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
      DocumentBuilder builder = factory.newDocumentBuilder();

      Document document = builder.newDocument();
      Element surveyElement = document.createElement("Survey");
      surveyElement.setAttribute("xmlns:abapsurvey", "http://www.sap.com/abapsurvey");

      FileConnection fileConnection = (FileConnection) Connector.open("file:///SDCard/survey_response.xml", Connector.READ_WRITE, true);
      OutputStream outputStream = fileConnection.openOutputStream();
      XMLWriter writer = new XMLWriter(outputStream);
      writer.setPrettyPrint();
      DOMInternalRepresentation.parse(document, writer);
    }
    catch (Exception ex)
    {
      ex.printStackTrace();
    }

  }

我正在尝试创建的XML结构如下：

<?xml version="1.0" encoding="utf-8" ?> 
- <Survey xmlns:abapsurvey="http://www.sap.com/abapsurvey" xmlns:bee="http://www.sap.com/survey/bee" xmlns:fo="http://www.w3.org/1999/XSL/Format" xmlns:htmlb="http://www.sap.com/survey/htmlb" xmlns:out="http://www.w3.org/1999/XSL/Output" xmlns:svy="http://www.sap.com/survey/svy" xmlns:tmp="http://www.sap.com/survey/tmp" xmlns:values="http://www.w3.org/1999/XSL/TransformValues" xmlns:wff="http://www.mysap.com/wff/2001">
- <Values>
- <Question QuestionId="q1">
- <Answer AnswerId="id_4214130a0e731678e10000000a114eea">
  <Value>id_4214134d0e731678e10000000a114eea</Value> 
  </Answer>
  </Question>
- <Question QuestionId="id_421413b20e731678e10000000a114eea">
- <Answer AnswerId="id_421413cb0e731678e10000000a114eea">
  <Value>id_421413f70e731678e10000000a114eea</Value> 
  </Answer>
  </Question>
- <Question QuestionId="id_4214142c0e731678e10000000a114eea">
- <Answer AnswerId="id_4214143e0e731678e10000000a114eea">
  <Value>id_4214f3f6f3eb3d67e10000000a114eea</Value> 
  </Answer>
  </Question>
- <Question QuestionId="id_4214f40cf3eb3d67e10000000a114eea">
- <Answer AnswerId="id_42144d6d48021679e10000000a114eea">
  <Value>id_42144d9048021679e10000000a114eea</Value> 
  </Answer>
  </Question> 
  </Survey>

我在笔记本电脑硬盘上创建了一个文件夹来模拟SD卡。当我调用此方法时，创建的XML只包含如下标题：

<?xml version="1.0"?>

为什么我尝试使用以下代码附加的元素未在XML中创建？

      Element surveyElement = document.createElement("Survey");
      surveyElement.setAttribute("xmlns:abapsurvey", "http://www.sap.com/abapsurvey");

请建议。

Answer 1

您可能需要在serverElement.setAttrib

之后添加另一个语句

doucment.appendChild(surveyElement);

此语句附加您创建的子元素。

使用net.rim.device.api.xml.parsers.DocumentBuilder在Blackberry中创建XMl

1 个答案: