不能读出xml内容 - Java / Web 开发

Java code:
package lier.basic;


import java.io.File;
import java.util.List;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

public class ReadXml{
public static void main(String[] args) {

SAXReader saxReader = null;
Document doc = null;

try {

saxReader = new SAXReader();
doc = saxReader.read(InitXmlLogin.initXML());
System.out.println(InitXmlLogin.initXML());
List<Element> list = doc.selectNodes("//bocb2e//head");
for (Element CdcEntryItem : list) {
String key = CdcEntryItem.elementTextTrim("trnid");

System.out.println(key);


}
} catch (DocumentException e) {
e.getMessage();
}
}
}

InitXmlLoginJava code:
package lier.basic;

public class InitXmlLogin {
public static String initXML()
{
String username=Getuserpwd.getuserpwd(1);
String pwd=Getuserpwd.getuserpwd(2);
String adate=Getdate.getdate();
StringBuffer fxml = new StringBuffer(&qu