以XPath方式获取XML元素值

下面是一个工具类，以XPath方式获取XML元素值，此工具类于上海期货交易所的一个系统项目中创建，代码如下：

java 代码

/**
 *
 */
package com.test.utils.toolkit;

import java.io.File;
import java.io.FileNotFoundException;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;

/**
 * @author shjy.nicholas
 *
 */
public class XMLToolkit {

    private String fileName = null ;
    private Document doc = null ;

    public XMLToolkit(String fileName) throws MalformedURLException, DocumentException, FileNotFoundException {
        this.fileName = fileName ;
        this.doc = readDocument() ;
    }

    private Document readDocument()
            throws MalformedURLException, DocumentException, FileNotFoundException {
        SAXReader reader = new SAXReader();
        Document document = reader.read(new File(this.fileName));
        return document;
    }

    public Element getRootElement() {
        return this.doc.getRootElement();
    }

    // 获取唯一节点的值
    public String getNodeValue(String path) {
        Node node = this.doc.selectSingleNode(path);
        String value = node.getText() ;
        return value;
    }

    // 获取多个同名节点的值
    public List getNodesValue(String path) {
        List list = this.doc.selectNodes(path);
        Iterator it = list.iterator() ;
        List resultList = new ArrayList() ;
        while(it.hasNext()) {
            Node node = (Node)it.next() ;
            resultList.add(node.getText()) ;
        }
        return resultList ;
    }

    public static void main(String[] args) {
        try {
            XMLToolkit xmlTool = new XMLToolkit("home/datasource.xml") ;
            String value = xmlTool.getNodeValue("//datasources/datasource/driver") ;
            System.out.println("value: " + value) ;
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (DocumentException e) {
            e.printStackTrace();
        }

    }
}

元素属性的获取将后续给出。

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• 2007-08-30 01:48
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