package com.xxxx;

import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;

import org.apache.log4j.Logger;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.bootstrap.DOMImplementationRegistry;
import org.w3c.dom.ls.DOMImplementationLS;
import org.w3c.dom.ls.LSSerializer;


public class BaseClient {

    static Logger logger = Logger.getLogger(BaseClient.class);

    private static LSSerializer domWriter;

    static {
        DOMImplementationRegistry registry;
        try {
            registry = DOMImplementationRegistry.newInstance();
            DOMImplementationLS impl = (DOMImplementationLS) registry
                    .getDOMImplementation("LS");
            domWriter = impl.createLSSerializer();

            domWriter.getDomConfig().setParameter("format-pretty-print",
                    Boolean.TRUE); // 是否格式化
            domWriter.getDomConfig().setParameter("xml-declaration", false); // 保留XML声明行

        } catch (Exception e) {
            logger.error("domWriter初始化出错", e);
        }
    }

    /**
     * 获取XML节点的XML内容.
     * @param node
     * @return
     */
    protected String getNodeXml(Node node) {
        return domWriter.writeToString(node);
    }
}