DOM4J实现XMl的增加,删除,修改,查询

DOM4J实现XMl的增加,删除,修改,查询

   

<?xml version="1.0" encoding="utf-8"?>
<addresslist>
 <linkman id="1">
<name>你好</name>
<email>[email protected]</email>
<gender>male</gender>
</linkman>
</addresslist>

 

 

实现代码：

 

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Iterator;

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

public class Dom4jTest {

    public static void main(String[] args) {
        try {
            init();
            add();
            traverse();
            edit(1);
            del(2);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static void del(int i) throws Exception {
        SAXReader reader = new SAXReader();
        Document document = reader.read(new File("address.xml"));
        Element root = document.getRootElement();

        @SuppressWarnings("unchecked")
        Iterator<Element> it = root.elementIterator();

        while (it.hasNext()) {
            Element e = it.next();
            if (Integer.parseInt(e.attributeValue("id")) == i) {
                root.remove(e);
                break;
            }

        }

        OutputFormat out = new OutputFormat("  ", true, "utf-8");
        XMLWriter writer = new XMLWriter(new FileOutputStream("address.xml"),
                out);
        writer.write(document);
        writer.close();
    }

    private static void edit(int i) throws Exception {
        SAXReader reader = new SAXReader();
        Document document = reader.read(new File("address.xml"));
        Element root = document.getRootElement();

        @SuppressWarnings("unchecked")
        Iterator<Element> it = root.elementIterator();

        while (it.hasNext()) {
            Element e = it.next();
            if (Integer.parseInt(e.attributeValue("id")) == i) {
                e.element("name").setText("你好");
                e.element("email").setText("[email protected]");
                break;
            }

        }

        OutputFormat out = new OutputFormat("  ", true, "utf-8");
        XMLWriter writer = new XMLWriter(new FileOutputStream("address.xml"),
                out);
        writer.write(document);
        writer.close();
    }

    private static void traverse() throws Exception {
        SAXReader reader = new SAXReader();
        Document document = reader.read(new File("address.xml"));
        Element root = document.getRootElement();

        @SuppressWarnings("unchecked")
        Iterator<Element> it = root.elementIterator();

        while (it.hasNext()) {
            Element e = it.next();
            System.out.println("id ：" + e.attributeValue("id"));
            System.out.println("姓名： " + e.element("name").getText());
            System.out.println("邮箱：" + e.elementText("email"));
            System.out.println("性别：" + e.elementText("gender"));
        }

    }

    @SuppressWarnings("deprecation")
    private static void add() throws Exception {
        SAXReader reader = new SAXReader();
        Document document = reader.read(new File("address.xml"));
        Element root = document.getRootElement();

        Element parent = root.addElement("linkman");
        parent.setAttributeValue("id", "2");

        Element name = parent.addElement("name");
        name.setText("李丽");

        Element email = parent.addElement("email");
        email.setText("[email protected]");

        Element gender = parent.addElement("gender");
        gender.setText("female");




        OutputFormat out = new OutputFormat("  ", true, "utf-8");
        XMLWriter writer = new XMLWriter(new FileOutputStream("address.xml"),
                out);
        writer.write(document);
        writer.close();

    }

    @SuppressWarnings("deprecation")
    private static void init() throws IOException {
        Document document = DocumentHelper.createDocument();

        Element root = document.addElement("addresslist");

        Element parent = root.addElement("linkman");

        parent.setAttributeValue("id", "1");

        Element name = parent.addElement("name");
        name.setText("李超");

        Element email = parent.addElement("email");
        email.setText("[email protected]");

        Element gender = parent.addElement("gender");
        gender.setText("male");

        OutputFormat out = new OutputFormat("  ", true, "utf-8");
        XMLWriter writer = new XMLWriter(new FileOutputStream("address.xml"),
                out);
        writer.write(document);
        writer.close();

    }

}

 结果：