java解析XML，

java解析XML，

调用了第三包Org.jdom

Java代码如下

 

import org.jdom.*;
import org.jdom.input.*;
import java.io.*;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
/**
 * XML解析工具
 * @author xiaoliang.zhou
 * 2011-4-28
 *
 */
public class XmlReader {
    private  Element rootElement = null;
    List result = null;
    /**
     * 初始化DOM的根
     */
    public XmlReader(String xmlFile){
        result = new ArrayList();
        try {
            SAXBuilder builder = new SAXBuilder();//定义解析器
            Document doc = null;
            doc = builder.build(new FileInputStream(xmlFile));//读取XML文件并解析成document
            this.rootElement=doc.getRootElement();//得到XML文件上面的根
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (JDOMException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    /**
     * 得到某个特定名称的所有节点内容
     * @param codeName节点名称
     * @return
     */
    public List getElementByCodeName(String codeName){
        return this.getElement(this.rootElement, codeName);
    }
    /**
     * 通过根节点得到某个节点的内容
     * @param rootElement根节点
     * @param codeName节点名称
     * @return该节点下的codeName对应的值
     */
    private List getElement(Element rootElement,String codeName){
        if(rootElement!=null){
            List<Element> childs =  rootElement.getChildren();
            for(Element child:childs){
                if(child.getChildren()!=null&&child.getChildren().size()>0){
                    //说明是父节点
                    getElement(child,codeName);
                }else{
                    if(child.getName().equals(codeName)){
                        //找到了相应的节点
                        this.result.add(child.getTextTrim());
                    }
                }
            }
        }
        return result;
    }

    public static void main(String [] args){
        XmlReader xmlReader = new XmlReader("demo1.xml");
        List datas=xmlReader.getElementByCodeName("description");
        for(Object obj:datas){
            System.out.println(obj);
        }
    }
}

我的demo1.xml内容如下

 

<?xml version="1.0" encoding="ISO-8859-1"?>
<!-- Edited with XML Spy v2007 (http://www.altova.com) -->
<?xml-stylesheet type="text/xsl" href="demo1.xsl"?>
<breakfast_menu>
    <food>
        <name>Belgian Waffles</name>
        <price>$5.95</price>
        <description>two of our famous Belgian Waffles with plenty of real maple syrup</description>
        <calories>650</calories>

    </food>
    <food>
        <name>Strawberry Belgian Waffles</name>
        <price>$7.95</price>
        <description>light Belgian waffles covered with strawberries and whipped cream</description>
        <calories>900</calories>
    </food>

    <food>
        <name>Berry-Berry Belgian Waffles</name>
        <price>$8.95</price>
        <description>light Belgian waffles covered with an assortment of fresh berries and whipped cream</description>
        <calories>900</calories>
    </food>
    <food>

        <name>French Toast</name>
        <price>$4.50</price>
        <description>thick slices made from our homemade sourdough bread</description>
        <calories>600</calories>
    </food>
    <food>
        <name>Homestyle Breakfast</name>

        <price>$6.95</price>
        <description>two eggs, bacon or sausage, toast, and our ever-popular hash browns</description>
        <calories>950</calories>
    </food>
</breakfast_menu>