XQuery环境开发

前言

Xquery的环境配置

示例

jar包

idea新建maven项目，将jar包下载下来并添加入Libraries

https://sourceforge.net/projects/saxon/

xqy

在项目根目录新建book.xqy文件

for $x in doc("books.xml")/books/book
where $x/price>30
return $x/title

xml

在项目根目录新建book.xml文件

<books>

   <book category="JAVA">
      <title lang="en">15天搞定Java</title>
      <author>Maxsu</author>
      <year>2015</year>
      <price>30.00</price>
   </book>

   <book category="DOTNET">
      <title lang="en">15天搞定.Net</title>
      <author>Susen</author>
      <year>2018</year>
      <price>40.50</price>
   </book>

   <book category="XML">
      <title lang="en">3天搞定XQuery</title>
      <author>Yizhi</author>
      <author>Maxsu</author> 
      <year>2016</year>
      <price>50.00</price>
   </book>

   <book category="XML">
      <title lang="en">24小时搞定XPath</title>
      <author>Jazz Bee</author>
      <year>2019</year>
      <price>16.50</price>
   </book>

</books>

XQueryTester.java

新建, XQueryTester.java并导入相应的包

public class XQueryTester {
   public static void main(String[] args){
      try {
         execute();
      }

      catch (FileNotFoundException e) {
         e.printStackTrace();
      }

      catch (XQException e) {
         e.printStackTrace();
      }
   }

   private static void execute() throws FileNotFoundException, XQException{
      InputStream inputStream = new FileInputStream(new File("books.xqy"));
      XQDataSource ds = new SaxonXQDataSource();
      XQConnection conn = ds.getConnection();
      XQPreparedExpression exp = conn.prepareExpression(inputStream);
      XQResultSequence result = exp.executeQuery();

      while (result.next()) {
         System.out.println(result.getItemAsString(null));
      }
   }    
}

点击运行即可