I am a newbie to JDom, I try to use XPath to access my xml file. My code is like following:
public static void main(String[] args) throws Exception {
Document doc = new SAXBuilder().build("file.xml");
XPath x = XPath.newInstance("xpath");
//select the first element in the nodeset
Element elem = (Element)x.selectSingleNode(doc);
......
}
I have already imported org.jdom.xpath.XPath class. When I use javac to compile the class, it didn't give any error, however when I try to run the program, it gives the following exception message:
Exception in thread "main" java.lang.NoClassDefFoundError: org/jaxen/NamespaceContext
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at org.jdom.xpath.XPath.newInstance(XPath.java:134)
at myclassname.main(xmlTohtml.java:18)
Caused by: java.lang.ClassNotFoundException: org.jaxen.NamespaceContext
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
... 4 more
Did I miss something here? Any help will be greatly appreciated!
I add the jaxen and dom4j in my .cshrc file which resides directly under my home directory, and the two jar files are in the same directory too.
setenv CLASSPATH ${CLASSPATH}:/homedirectory/jaxen-1.1.1.jar
setenv CLASSPATH ${CLASSPATH}:/homedirectory/dom4j-1.6.1.jar
When I try this command from the command line, it generates new exceptions....
Exception in thread "main" java.lang.NoClassDefFoundError: :
Caused by: java.lang.ClassNotFoundException: :
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
By the way, the imported classes in my program are:
import java.util.Iterator;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;
import org.jdom.Namespace;
import org.jdom.xpath.XPath;
