这里是你方案的一个固定版本。 我所作的改动如下:

• I removed the DocBuilder-stuff from the save() method. These calls are needed to construct a new Document. Once you have such an object (and you do since it is passed in as an argument) you don t need the DocumentBuilder anymore. A proper use of DocumentBuilder is illustrated in the main method, below.
• _node,_element need not be fields. They get new values with each pass through the loop inside save so I made them local variables. In addition I changed their names to category and name to reflect their association with the elements in the XML document.
• There s never a need to create a new String object by using new String(). A simple "" in enough (see the initialization of the category and name variables).
• Instead of looping over everything (via "*") the loop now iterates over element elements. Then there is a an inner loop that iterates over the children of each element, namely: its category_id and name elements.
• In each pass of the inner we set either the category or the name variable depending on the name of the node at hand.
• The actual value that is set to these variables is obtained by via node.getTextContent() which returns the stuff between the node s enclosing tags.

<级编码>数据库。

  public class database {
     private static PersistentObject storeVenue;
     static final long key = 0x2ba5f8081f7ef332L;
     public Hashtable hashtable;
     public Vector venue_list;

     public database() {
        storeVenue = PersistentStore.getPersistentObject(key);
     }

     public void save(Document xml) {
        venue_list = new Vector();
        storeVenue.setContents(venue_list);

        Hashtable categories = new Hashtable();

        try {

           xml.getDocumentElement().normalize();

           NodeList list = xml.getElementsByTagName("element");

           for (int i = 0; i < list.getLength(); i++) {

              String category = "";
              String name = "";
              NodeList children = list.item(i).getChildNodes();
              for(int j = 0; j < children.getLength(); ++j)
              {
                 Node n = children.item(j);
                 if("category_id".equals(n.getNodeName()))
                    category = n.getTextContent();
                 else if("name".equals(n.getNodeName()))
                    name = n.getTextContent();
              }

              categories.put(category, name);

              System.out.println("category=" + category + "; name=" + name);
           }

        } catch (Exception e) {
           System.out.println(e.toString());
        }

        venue_list.addElement(categories);

        storeVenue.commit();
     }
  }

主要方法如下:

  public static void main(String[] args) throws Exception {
     DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory
        .newInstance();
     DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
     docBuilder.isValidating();

     Document xml = docBuilder.parse(new File("input.xml"));

     database db = new database();
     db.save(xml);
  }

非常感谢。 我仅稍作改动,就能够做我所期待的。

Here are the modifications I had to do: Even though I am building in 1.5, getTextContent was not available. I had to use category = n.getFirstChild().getNodeValue(); to obtain the value of each node. Though there may have been a simple solution like updating my build settings, I am not familiar enough with BB requirements to know when it is safe to stray from the default recommended build settings.

在主线上,我不得不改变这一思路:

 Document xml = docBuilder.parse(new File("input.xml"));

so that it was reading from an InputStream delivered from my web server, and not necessarily a local file - even though I wonder if storing the xml local would be more efficient than storing a vector full of hash tables. ...

InputStream responseData = connection.openInputStream();
 Document xmlParsed = docBuilder.parse(result);

显然,为了保持这一可读性,我ski熟地把吉大港山区连接部分。

你的帮助使我有一个全周的盲目脱胎。 非常感谢! 希望这一职位也能帮助其他人。

 //res/xml/input.xml
 private static String _xmlFileName = "/xml/input.xml";

 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
 DocumentBuilder builder = factory.newDocumentBuilder();
 InputStream inputStream = getClass().getResourceAsStream( _xmlFileName );
 Document document = builder.parse( inputStream );