用saxon框架对xml数据进行过滤

Saxon 是一个 XSLT 和XQuery处理器。它是使用 XML 文档和样式表作为输入，然后生成结果文档作为输出的程序，它还包括了一个串行化器，用于将结果树转换成 XML、HTML 或纯文本。

 

 Saxon8以上版本主要组成有：XSLT 2.0处理器、 XPath 2.0处理器、 XQuery 1.0处理器、XML Schema 1.0处理器。

 

XPath 教程： http://www.w3school.com.cn/xpath/index.asp

XQuery 教程：http://www.w3school.com.cn/xquery/index.asp

 

 以下范例代码在saxonb9-1-0-8j包下测试通过：

 

1、xml文档内容

<?xml version="1.0" encoding="UTF-8"?>
<flight>
	<row flightno="CA3411" airline_code="CA" airline_namecn="中国国际航空公司" airline_nameen="Air China" city_code="SHA" city_namecn="上海虹桥" city_nameen="Shanghai" flight_date="20130202" flight_time="2200" status_code="cancel" status_namecn="取消" status_nameen="Cancel" checkin_counter="M2-3" gate="A118"/>
	<row flightno="CA3411" airline_code="CA" airline_namecn="中国国际航空公司" airline_nameen="Air China" city_code="SHA" city_namecn="上海虹桥" city_nameen="Shanghai" flight_date="20130202" flight_time="2300" status_code="fly" status_namecn="起飞" status_nameen="Fly" checkin_counter="M2-3" gate="A118"/>
	<row flightno="CZ3412" airline_code="CZ" airline_namecn="中国南方航空公司" airline_nameen="South Air" city_code="PEK" city_namecn="北京" city_nameen="Beijing" flight_date="20130203" flight_time="2200" status_code="fly" status_namecn="起飞" status_nameen="Fly" checkin_counter="M1-3" gate="A218"/>
</flight>

 

2、java源码

public class Test2 {
	public static void main(String[] args) {
		try{
			DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
			DocumentBuilder builder = builderFactory.newDocumentBuilder();
			
			//从文档中加载xml内容
			InputStream in = Class.class.getResourceAsStream("/flight/flight_data.xml");
			Document document = builder.parse(in);
			document.normalize(); //去掉XML文档中空白部分
			
			//从字符串中加载xml内容
			//StringReader sr = new StringReader("<flight><row flightno=\"CA3411\" airline_code=\"CA\" airline_namecn=\"中国国际航空公司\" airline_nameen=\"Air China\" city_code=\"SHA\" city_namecn=\"上海虹桥\" city_nameen=\"Shanghai\" flight_date=\"20130202\" flight_time=\"2300\" status_code=\"fly\" status_namecn=\"起飞\" status_nameen=\"Fly\" checkin_counter=\"M2-3\" gate=\"A118\"/></flight>");
			//InputSource is = new InputSource(sr);
			//Document document = builder.parse(is);
			//document.normalize(); //去掉XML文档中空白部分
			
			//xQuery表达式
			StringBuffer sb = new StringBuffer();
			sb.append(" for $s in /flight/row where 1=1 ");
			sb.append(" and contains(upper-case($s/@flightno), 'CA') ");
			sb.append(" and contains(upper-case($s/@city_namecn), '海') ");
			sb.append(" and upper-case($s/@airline_code)='CA' ");
			sb.append(" and $s/@flight_date='20130202' ");
			sb.append(" and $s/@flight_time>='2300' ");
			sb.append(" and $s/@flight_time<='2300' ");
			sb.append(" and $s/@status_code='fly' ");
			sb.append(" return $s ");
			
			Configuration configuration = new Configuration();
			
			//静态查询上下文
			StaticQueryContext context = new StaticQueryContext(configuration);
			XQueryExpression expression = context.compileQuery(sb.toString());
			
			//动态查询上下文
			DynamicQueryContext context2 = new DynamicQueryContext(configuration);  
			context2.setContextItem(new DocumentWrapper(document, null, configuration));
			
			Properties props = new Properties();
			props.setProperty(OutputKeys.METHOD, "xml");
			props.setProperty(OutputKeys.INDENT, "yes");
			props.setProperty(OutputKeys.ENCODING, "GBK");
			props.setProperty(OutputKeys.VERSION, "1.0");
			
			//根据xQuery表达式解析xml文件，返回符合条件的数据，存储到writer对象
			Writer writer = new StringWriter();
			expression.run(context2, new StreamResult(writer), props);
			
			System.out.println(writer.toString());
			
		}catch(Exception ex){
			ex.printStackTrace();
		}
	}
}

  

3、输出结果

<?xml version="1.0" encoding="GBK"?>
<row airline_code="CA" airline_namecn="中国国际航空公司" airline_nameen="Air China"
     checkin_counter="M2-3"
     city_code="SHA"
     city_namecn="上海虹桥"
     city_nameen="Shanghai"
     flight_date="20130202"
     flight_time="2300"
     flightno="CA3411"
     gate="A118"
     status_code="fly"
     status_namecn="起飞"
     status_nameen="Fly"/>