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5.²éÕÒÖ¸¶¨ÃûµÄElement(Ò»¸ö) /** * Gets the first child element with the given name or returns null if one can't be found. * @param parent the parent element of the child element to search for * @param childName the name of the child element * @param deepSearch - if True then the search will be performed on all levels * If False then only Direct childs will be searched * @return the first child element with the given name or null if one can't be found. */ public static Element getFirstChildElementNamed(Element parent, String childName, boolean deepSearch) {    if (parent == null)    {      throw new NullPointerException("Parent element cannot be null");    }    NodeList children = parent.getChildNodes();    Element child = null;    for (int i = 0; i < children.getLength() && child == null; i++)    {      if (children.item(i).getNodeName().equals(childName))      {        child = (Element)children.item(i);      }      else if ((deepSearch) && (children.item(i).getNodeType() == Element.ELEMENT_NODE))      {        child = getFirstChildElementNamed((Element)children.item(i), childName, deepSearch);      }    }    return child; } 5.²éÕÒÖ¸¶¨ÃûµÄElement(Ò»×é) /** * Gets any child elements with the given name or returns null if one can't be found. * @param parent the parent element of the child element to search for * @param childName the name of the child element * @param deepSearch - if True then the search will be performed on all levels * If False then only Direct chileds will be searched * @return the first child element with the given name or null if one can't be found. */ public static Element[] getAllChildElementNamed(Element parent, String childName, boolean deepSearch) {    if (parent == null)    {      throw new NullPointerException("Parent element cannot be null");    }    NodeList children = parent.getChildNodes();    ArrayList child = new ArrayList();    for (int i = 0; i < children.getLength(); i++)    {      if (children.item(i).getNodeName().equals(childName))      {        child.add(children.item(i));      }      else if ((deepSearch) && (children.item(i).getNodeType() == Element.ELEMENT_NODE))      {        Element[] childs = getAllChildElementNamed((Element)children.item(i), childName, deepSearch);        for (int j=0; j< childs.length; j++)        {          child.add(childs[j]);        }      }    }    return (Element[])child.toArray(new Element[0]); }