读取xml

Question

[code="java"]
public class TestXml {

public static void main(String[] args) throws Exception {

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

factory.setNamespaceAware(true); // never forget this!

DocumentBuilder builder = factory.newDocumentBuilder();

Document doc = builder.parse("d://dd.xml");

                XPathFactory pathFactory = XPathFactory.newInstance();   

                XPath xpath = pathFactory.newXPath();   

                XPathExpression pathExpression = xpath.compile("//Model/o:Column/a:Name/text()");    

                Object result = pathExpression.evaluate(doc, XPathConstants.NODESET);   

                NodeList nodes = (NodeList) result;   
                for (int i = 0; i < nodes.getLength(); i++) {   
                        System.out.println(nodes.item(i).getNodeValue());   
                }   
        }   
} 

[/code]
dd.xml
[code="java"]
<?xml version="1.0" encoding="GB2312"?>
<?PowerDesigner AppLocale="UTF16" ID="{64EF704A-101D-4EF0-B2F3-F2586373698A}" Label="" Name="rank" Objects="203" Symbols="12"ID="{64EF704A-101D-4EF0-B2F3-F2586373698A}" Label="" Name="rank" Objects="203" Symbols="12" Target="ORACLE Version 10g" Type="{CDE44E21-9669-11D1-9914-006097355D9B}" signature="PDM_DATA_MODEL_XML"version="12.0.0.1700"?>

627887B7-D8B5-4151-936A-15A527C092B1/a:ObjectID
排行控制表ID/a:Name
rank_control_id/a:Code
1269244973/a:CreationDate
Administrator/a:Creator
1269259813/a:ModificationDate
Administrator/a:Modifier
排行控制表主键/a:Comment
NUMBER(19)/a:DataType
19/a:Length
1/a:Mandatory
/o:Column

[/code]
这样为什么不能读取？
但是下面这个不要命名空间的可以读取
[code="java"]
<?xml version="1.0" encoding="GB2312"?>
<?PowerDesigner AppLocale="UTF16" ID="{64EF704A-101D-4EF0-B2F3-F2586373698A}" Label="" Name="rank" Objects="203" Symbols="12"ID="{64EF704A-101D-4EF0-B2F3-F2586373698A}" Label="" Name="rank" Objects="203" Symbols="12" Target="ORACLE Version 10g" Type="{CDE44E21-9669-11D1-9914-006097355D9B}" signature="PDM_DATA_MODEL_XML"version="12.0.0.1700"?>


627887B7-D8B5-4151-936A-15A527C092B1
排行控制表ID
rank_control_id
1269244973
Administrator
1269259813
Administrator
排行控制表主键
NUMBER(19)
19
1


[/code]

Answer 1

[quote]试试去解析一下pdm文件里面的表的字段的信息。我现在就在搞这个，很难解析啊 [/quote]

难怪 PowerDesigner 的 看你的XML 咋那么别扭了！ 好的我试试！