XML工具类

XML工具类，提供序列化XML、反序列化XML、获取指定节点的值的方法。

 

源码如下：(点击下载 - XmlUtils.java、dom4j-1.6.1.jar、xstream-1.4.7.jar )

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import com.thoughtworks.xstream.XStream;

/**
 * XML工具类
 * 
 */
public class XmlUtils {

    private final static String XML_DECLARATION = "<?xml version="1.0" encoding="utf-8"?>";

    private XmlUtils() {
    }

    /**
     * 序列化XML
     * 
     * @param obj
     * @param clazz
     * @return
     */
    public static <T> String toXML(Object obj) {
        XStream stream = getXStream();
        stream.processAnnotations(obj.getClass());
        return new StringBuffer(XML_DECLARATION).append(stream.toXML(obj)).toString();
    }

    /**
     * 反序列化XML
     * 
     * @param xmlStr
     * @param clazz
     * @return
     */
    public static <T> T fromXML(String xmlStr, Class<T> clazz) {
        XStream stream = getXStream();
        stream.processAnnotations(clazz);
        Object obj = stream.fromXML(xmlStr);
        try {
            return clazz.cast(obj);
        } catch (ClassCastException e) {
            return null;
        }
    }

    /**
     * 获取指定节点的值
     * 
     * @param xpath
     * @param params
     * @return
     */
    public static String getNodeValue(String xpath, String dataStr) {
        try {
            // 将字符串转为xml
            Document document = DocumentHelper.parseText(dataStr);
            // 查找节点
            Element element = (Element) document.selectSingleNode(xpath);
            if (element != null) {
                return element.getStringValue();
            }
        } catch (DocumentException e) {
            e.printStackTrace();
        }
        return "";
    }

    /**
     * 获取Xstream实例
     * 
     * @return
     */
    public static XStream getXStream() {
        return new XStream();
    }
}