Servlet 和 XQuery

Question

我编写了一个 java 类来在 XML 数据库上运行一个简单的 XQuery（使用 Saxon xqj）。该查询在此类中运行良好。但我想从 servlet 访问这个类。问题是 servlet 没有找到 java 类，当我运行 servlet 时它得到java.lang.ClassNotFoundException: javax.xml.xquery.XQException。请问有什么想法吗？

Java 类就这么简单：

import java.util.Properties;
import javax.xml.xquery.XQConnection;
import javax.xml.xquery.XQException;
import javax.xml.xquery.XQPreparedExpression;
import javax.xml.xquery.XQResultSequence;
import javax.xml.xquery.XQSequence;
import javax.xml.namespace.QName;
import net.sf.saxon.xqj.SaxonXQDataSource;
import org.xml.sax.SAXException;

public class XMLClass {
public static String xmldata() throws XQException{
    XQConnection con;
    String output = null;
    final String sep = System.getProperty("line.separator");
    String fileName= "cd_book.xml";
        con = new SaxonXQDataSource().getConnection();
        System.out.println("Connected");
    String queryString = "declare variable $docName as xs:string external;"+sep +
   "for $x in doc($docName)/*" +
   " return $x";
   XQPreparedExpression expr = con.prepareExpression(queryString);
   expr.bindObject(new QName("docName"), fileName, null);
   XQResultSequence rs = expr.executeQuery();
   String result =rs.getSequenceAsString(new Properties());
   return result;

    }
   }

Servlet 是：

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.xquery.XQException;
public class ServletXML extends HttpServlet {
private static final long serialVersionUID = 1L;

public ServletXML() {
    super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)  throws ServletException, IOException {

try {
        XMLClass.xmldata();
        } catch (XQException e) {
            e.printStackTrace()
 }

}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
}

Answer 1

然后你的类可能会从你的类路径中丢失。你是如何编译和运行它的？

另外，最好将两者都放入一个或多个包中，如果您的类位于不同的包中，则从您的 servlet 导入您的类。