cacheConfig.xml中读取配置文件信息三2010-07-07

最新推荐文章于 2021-01-18 13:39:14 发布

原创最新推荐文章于 2021-01-18 13:39:14 发布 · 313 阅读

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#XML

本文介绍了一个使用XPath表达式从XML文档中解析特定元素内容的Java类。该类提供了几个方法来读取默认Keyspace、默认ColumnFamily及DataBindings映射。

/** 解析默认Keyspace.
*/
private String readDefaultKeyspace(XPath aXpath, Document aDoc)
throws XPathExpressionException
{
XPathExpression pathExpression = aXpath.compile("//defaultKeyspace");
Node node = (Node) pathExpression.evaluate(aDoc, XPathConstants.NODE);
return node.getTextContent();
}

/** 解析默认ColumnFamily
* @param aDoc 文档对象
* @return String 默认ColumnFamily
*/
private String readDefaultColumnFamily(XPath aXpath, Document aDoc)
throws XPathExpressionException
{
XPathExpression pathExpression =
aXpath.compile("//defaultColumnFamily");
Node node = (Node) pathExpression.evaluate(aDoc, XPathConstants.NODE);
return node.getTextContent();
}

/** 解析DataBindings.
* @param aDoc 文档对象
*/
private Map<String, String> readDataBindingMap(XPath aXpath, Document aDoc)
throws XPathExpressionException
{
Map<String, String> dataBindingMap = new HashMap<String, String>();
XPathExpression pathExpression =
aXpath.compile("//dataBindings/property");
NodeList nodeList = (NodeList) pathExpression.evaluate(aDoc,
XPathConstants.NODESET);
String name = null;
String value = null;
for (int i = 0; i < nodeList.getLength(); i++)
{
name = nodeList.item(i)
.getAttributes()
.getNamedItem("name")
.getNodeValue();
value = nodeList.item(i)
.getAttributes()
.getNamedItem("value")
.getNodeValue();
dataBindingMap.put(name, value);
}
return dataBindingMap;
}
}