问Java/DOM:获取节点的XML内容

EN

private String innerXml(Node node){
        String s = "";
        NodeList childs = node.getChildNodes();
        for( int i = 0;i<childs.getLength();i++ ){
            s+= serializeNode(childs.item(i));
        }
        return s;
    }

    private String serializeNode(Node node){
        String s = "";
        if( node.getNodeName().equals("#text") ) return node.getTextContent();
        s+= "<" + node.getNodeName()+" ";
        NamedNodeMap attributes = node.getAttributes();
        if( attributes!= null ){
            for( int i = 0;i<attributes.getLength();i++ ){
                s+=attributes.item(i).getNodeName()+"=\""+attributes.item(i).getNodeValue()+"\"";
            }
        }
        NodeList childs = node.getChildNodes();
        if( childs == null || childs.getLength() == 0 ){
            s+= "/>";
            return s;
        }
        s+=">";
        for( int i = 0;i<childs.getLength();i++ )
            s+=serializeNode(childs.item(i));
        s+= "</"+node.getNodeName()+">";
        return s;
    }