dom4j

<?xml version="1.0" encoding="UTF-8"?>
<books>
    <book id="book1">
        <name>三国演义</name>
        <price>99.88</price>
    </book>
    <book id="book2">
        <name>西游记</name>
        <price>77.88</price>
    </book>
    <book id="book3">
        <name>李白的诗</name>
        <price>88.88</price>
    </book>
</books>

 

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

import java.util.Iterator;
import java.util.List;

public class TestDom01 {
    public static void main(String[] args) throws DocumentException {
        SAXReader saxReader = new SAXReader();
        Document doc = saxReader.read("books.xml");
        //得到根节点
        Element root = doc.getRootElement();
        System.out.println(root.getName());//root
        //遍历显示所有的数据
        List<Element> list = root.elements("book");
        for (Element book:list){
            Attribute id = book.attribute("id");
            System.out.println("id:"+id.getValue());
            //迭代器
            Iterator<Element> it = book.elementIterator();
            while (it.hasNext()){
                Element element = it.next();
                System.out.println(element.getName()+":"+element.getText());
            }
            System.out.println("----------------");
        }
    }
}

 

import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

import java.io.FileWriter;
import java.io.IOException;
import java.util.List;

public class TestDom02 {
    public static void main(String[] args) throws DocumentException, IOException {
        //需求：实现 删除 id="book3"这样的一个节点
        /*
        <book id="book">
        <name>李白的诗</name>
        <price>88.88</price>
        </book>
         */
        //解析xml文件
        SAXReader saxReader = new SAXReader();
        Document doc = saxReader.read("books.xml");
        //得到根节点
        Element root = doc.getRootElement();
        //找到相应的节点
        List<Element> bookList = root.elements("book");
        for (Element book:bookList){
            Attribute id = book.attribute("id");
            if ("book3".equals(id.getValue())){
                book.getParent().remove(book);//删除
            }
        }
        //保存到xml文件
        OutputFormat format = OutputFormat.createPrettyPrint();
        format.setEncoding("UTF-8");
        XMLWriter writer = new XMLWriter(new FileWriter("books.xml"));
        writer.write(doc);
        writer.close();
        System.out.println("删除成功");
    }
}

 

import org.dom4j.*;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

import java.io.FileWriter;
import java.io.IOException;
import java.util.List;

public class TestDom03 {
    public static void main(String[] args) throws DocumentException, IOException {
        //需求：实现 新增节点
        /*
        <book id="book">
        <name>李白的诗</name>
        <price>88.88</price>
        </book>
         */
        //解析xml文件
        SAXReader saxReader = new SAXReader();
        Document doc = saxReader.read("books.xml");
        //得到根节点
        Element root = doc.getRootElement();
        //新增节点
        Element book = DocumentHelper.createElement("book");
        book.addAttribute("id", "book3");

        Element name = DocumentHelper.createElement("name");//创建节点
        name.setText("李白的诗");//设置属性
        book.add(name);//添加节点

        Element price = DocumentHelper.createElement("price");
        price.setText("88.88");
        book.add(price);
        root.add(book);
        //保存到xml文件
        OutputFormat format = OutputFormat.createPrettyPrint();
        format.setEncoding("UTF-8");
        XMLWriter writer = new XMLWriter(new FileWriter("books.xml"));
        writer.write(doc);
        writer.close();
        System.out.println("新增成功");
    }
}

 

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

import java.io.FileWriter;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;

public class TestDom04 {
    public static void main(String[] args) throws DocumentException, IOException {
        //需求 实现 修改 id="book3"这样的一个节点 李白的诗-》李清照的诗句
        SAXReader saxReader = new SAXReader();
        Document doc = saxReader.read("books.xml");
        //得到根节点
        Element root = doc.getRootElement();
        System.out.println(root.getName());//root
        //遍历所有的数据
        List<Element> list = root.elements("book");
        for (Element book : list) {
            //找到对应的节点
            if ("book3".equals(book.attribute("id").getValue())) {
                //迭代器
                Iterator<Element> it = book.elementIterator();
                while (it.hasNext()) {
                    Element element = it.next();
                    //找到要修改的文本
                    if ("李白的诗".equals(element.getText())) {
                        element.setText("李清照的诗");
                        System.out.println(element.getName() + ":" + element.getText());
                        break;
                    }
                }
                break;
            }
        }
        //保存到xml文件
        OutputFormat format = OutputFormat.createPrettyPrint();
        format.setEncoding("UTF-8");
        XMLWriter writer = new XMLWriter(new FileWriter("books.xml"));
        writer.write(doc);
        writer.close();
        System.out.println("修改成功");
    }
}

 

标签：dom4j,Element,book,io,org,import
来源： https://www.cnblogs.com/linlinmailbox/p/16514067.html