java saxon,在Java中使用SAXON Xpath引擎

这是我的代码：

public static void main(String[] args) {

// System.setProperty(

// "javax.xml.xpath.XPathFactory",

// "net.sf.saxon.xpath.XPathFactoryImpl");

String xml="#BBB##CCC##DDD#";

try{

JDocument dom = new JDocument(xml);

XPathFactory factory = net.sf.saxon.xpath.XPathFactoryImpl.newInstance();

XPath xpath = factory.newXPath();

XPathExpression expr = xpath.compile("//a[matches(.,'#...#')]");

Object result = expr.evaluate(dom, XPathConstants.NODESET);

NodeList nodes = (NodeList) result;

Nodes sharped = new Nodes(nodes);

for (Node n:sharped){

System.out.println(n.toString());

}

}

catch(Exception e){

e.printStackTrace();

}

}

我明白了：

javax.xml.transform.TransformerException: Impossible to find the function : matches

at org.apache.xpath.compiler.XPathParser.error(XPathParser.java:608)

at org.apache.xpath.compiler.XPathParser.FunctionCall(XPathParser.java:1505)

at org.apache.xpath.compiler.XPathParser.PrimaryExpr(XPathParser.java:1444)

at org.apache.xpath.compiler.XPathParser.FilterExpr(XPathParser.java:1343)

at org.apache.xpath.compiler.XPathParser.PathExpr(XPathParser.java:1276)

这意味着当我通过net.sf.saxon.xpath.XPathFactoryImpl清楚地创建我的工厂时,Java正在使用org.apache.xpath.compiler.XPathParser类.

(我实际上只需要在我的xpaths中添加一些匹配…所以如果任何不涉及Saxon的解决方案已知,请考虑我的需求.)

我究竟做错了什么 ？