Java讀取XML文件實現方法

 1、使用JAVA javax.xml.parsers ,org.w3c.dom,org.xml.sax    下的相關類來實現，（DocumentBuilder，DocumentBuilderFactory，Document，Element，Node，NodeList）

XML文件內容如下：

 

<struts>
    <package name="dotashop-default" namespace="/" extends="struts-default">
        <action name="index">
            <result>/index.jsp</result>
            <result>/index2.jsp</result>
            <result>/index3.jsp</result>
            <result>/index4.jsp</result>
            <result>/index5.jsp</result>
            <result>/index6.jsp</result>
            <result>/index7.jsp</result>
            <result>/index8.jsp</result>
        </action>
    </package>
</struts>

要求讀出標籤<result></result>內的內容？

Java代碼實現如下：

 

import java.io.File;
import java.io.IOException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

public class S {
   public static void main(String[] args) {
    try {
   DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();   DocumentBuilder db = factory.newDocumentBuilder();
    Document doc = db.parse(new File("E:/JavaWork/test/src/com/test/struts.xml"));
    Element elmtInfo = doc.getDocumentElement();
    NodeList nodes = elmtInfo.getChildNodes();
    int m = 1;
    for (int i = 0; i < nodes.getLength(); i++) {
        Node result = nodes.item(i);
        if (result.getNodeType() == Node.ELEMENT_NODE && result.getNodeName().equals("package")) {
        NodeList ns = result.getChildNodes();
    for (int j = 0; j < ns.getLength(); j++) {
        Node record = ns.item(j);
        if (record.getNodeType() == Node.ELEMENT_NODE && record.getNodeName().equals("action")) {
        NodeList ks = record.getChildNodes();
    for (int k = 0; k < ks.getLength(); k++) {
        Node re = ks.item(k);
        if (re.getNodeType() == Node.ELEMENT_NOD && re.getNodeName().equals("result")) {
        System.out.println(m + ": "+ re.getTextContent());
        m++;
        }
    }

    }
    }
    }
    }
    } catch (ParserConfigurationException e) {
            e.printStackTrace();
    } catch (SAXException e) {
            e.printStackTrace();
    } catch (IOException e) {
            e.printStackTrace();
    }
    }
}

運行結果：

1: /index.jsp

2: /index2.jsp

3: /index3.jsp

4: /index4.jsp

5: /index5.jsp

6: /index6.jsp

7: /index7.jsp

8: /index8.jsp