• DOM4J的使用示例


    示例1:

    package com.shengsiyuan.dom4j;

    import java.io.FileOutputStream;
    import java.io.FileWriter;

    import org.dom4j.Document;
    import org.dom4j.DocumentHelper;
    import org.dom4j.Element;
    import org.dom4j.io.OutputFormat;
    import org.dom4j.io.XMLWriter;

    public class Test1
    {
    public static void main(String[] args) throws Exception
    {
    // 创建文档并设置文档的根元素节点 :第一种方式
    // Document document = DocumentHelper.createDocument();
    //
    // Element root = DocumentHelper.createElement("student");
    //
    // document.setRootElement(root);

    // 创建文档并设置文档的根元素节点 :第二种方式
    Element root = DocumentHelper.createElement("student");
    Document document
    = DocumentHelper.createDocument(root);

    root.addAttribute(
    "name", "zhangsan");

    Element helloElement
    = root.addElement("hello");
    Element worldElement
    = root.addElement("world");

    helloElement.setText(
    "hello");
    worldElement.setText(
    "world");

    helloElement.addAttribute(
    "age", "20");

    XMLWriter xmlWriter
    = new XMLWriter();
    xmlWriter.write(document);

    OutputFormat format
    = new OutputFormat(" ", true);

    XMLWriter xmlWriter2
    = new XMLWriter(new FileOutputStream("student2.xml"), format);
    xmlWriter2.write(document);

    XMLWriter xmlWriter3
    = new XMLWriter(new FileWriter("student3.xml"), format);

    xmlWriter3.write(document);
    xmlWriter3.close();

    }
    }

    示例2:

    package com.shengsiyuan.dom4j;

    import java.io.File;
    import java.util.Iterator;
    import java.util.List;

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

    import org.dom4j.Document;
    import org.dom4j.Element;
    import org.dom4j.io.DOMReader;
    import org.dom4j.io.SAXReader;

    public class Test2
    {
    public static void main(String[] args) throws Exception
    {
    SAXReader saxReader
    = new SAXReader();

    Document doc
    = saxReader.read(new File("student2.xml"));

    Element root
    = doc.getRootElement();

    System.out.println(
    "root element: " + root.getName());

    List childList
    = root.elements();

    System.out.println(childList.size());

    List childList2
    = root.elements("hello");

    System.out.println(childList2.size());

    Element first
    = root.element("hello");

    System.out.println(first.attributeValue(
    "age"));

    for(Iterator iter = root.elementIterator(); iter.hasNext();)
    {
    Element e
    = (Element)iter.next();

    System.out.println(e.attributeValue(
    "age"));
    }

    System.out.println(
    "---------------------------");

    DocumentBuilderFactory dbf
    = DocumentBuilderFactory.newInstance();
    DocumentBuilder db
    = dbf.newDocumentBuilder();
    org.w3c.dom.Document document
    = db.parse(new File("student2.xml"));

    DOMReader domReader
    = new DOMReader();

    //将JAXP的Document转换为dom4j的Document
    Document d = domReader.read(document);

    Element rootElement
    = d.getRootElement();

    System.out.println(rootElement.getName());
    }
    }

    示例3:

    package com.shengsiyuan.dom4j;

    import java.io.FileWriter;

    import org.jdom.Attribute;
    import org.jdom.Document;
    import org.jdom.Element;
    import org.jdom.output.Format;
    import org.jdom.output.XMLOutputter;

    public class Test3
    {
    public static void main(String[] args) throws Exception
    {
    Document document
    = new Document();

    Element root
    = new Element("联系人列表").setAttribute(new Attribute("公司",
    "A集团"));

    document.addContent(root);

    Element contactPerson
    = new Element("联系人");

    root.addContent(contactPerson);

    contactPerson
    .addContent(
    new Element("姓名").setText("张三"))
    .addContent(
    new Element("公司").setText("A公司"))
    .addContent(
    new Element("电话").setText("021-55556666"))
    .addContent(
    new Element("地址")
    .addContent(
    new Element("街道").setText("5街"))
    .addContent(
    new Element("城市").setText("上海"))
    .addContent(
    new Element("省份").setText("上海市")));

    XMLOutputter output
    = new XMLOutputter(Format.getPrettyFormat()
    .setIndent(
    " ").setEncoding("gbk"));

    output.output(document,
    new FileWriter("contact.xml"));

    }
    }

      

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  • 原文地址:https://www.cnblogs.com/zfc2201/p/2141441.html
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