Rhythmk 一步一步学 JAVA (16) dom4j 操作XML

时间：2022-01-21 04:28:40

1、项目文件结构图：

Rhythmk 一步一步学 JAVA (16) dom4j 操作XML

2、文件代码：

doc.xml

<?xml version="1.0" encoding="UTF-8"?>

<Shop>

  <Book id="1">

    <Name>语文</Name>

    <Type>文科</Type>

  </Book>

  <Book id="2">

    <Name>

  <!-- aaaaaasfsddsfa -->

    数学</Name>

    <Type>理科</Type>

  </Book>

  <Book id="3">

    <Name>英语</Name>

    <Type>文科</Type>

  </Book>

</Shop>

Dom4jMain.java

package Dom4j.Rrhythmk.com;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileWriter;

import java.io.IOException;

import java.io.InputStream;

import java.io.ObjectInputStream.GetField;

import java.io.Writer;

import java.util.Iterator;

import java.util.List;

import org.dom4j.Document;

import org.dom4j.Element;

import org.dom4j.io.SAXReader;

import org.dom4j.DocumentHelper;

public class Dom4jMain {

    public static void main(String[] args) {

        String path = System.getProperty("user.dir") + "\\" + "\\xml\\Doc.xml";

        System.out.println(path);

        ReadXML(path);

        StringToXML();

    }

    /*

     * 读取XML

     */

    public static void ReadXML(String path) {

        try {

            InputStream inputStream = new FileInputStream(new File(path));

            SAXReader saxRD = new SAXReader();

            Document doc = saxRD.read(inputStream);

            Element element = doc.getRootElement();

            System.out.println("getNamespace:" + element.getNamespace());

            System.out.println("节点名称-getName:" + element.getName());

            System.out.println("getText:" + element.getText());

            Iterator<Element> bookList = element.elements("Book").iterator();

            while (bookList.hasNext()) {

                Element nextElement = bookList.next();

                System.out.println(nextElement.attribute("id").getText());

                System.out

                        .println(nextElement.element("Name").getStringValue());

                System.out

                        .println(nextElement.element("Type").getStringValue());

            }

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

    /*

     *  字符串转换XML

     *  修改XML节点

     *  保存XML

     * */

    public static void StringToXML() {

        try {

            // 1、字符串转换XML

            System.out.println("StringToXML-字符串转换成XML对象");

            String xmlStr = "<Shop><Book id=\"1\"><Name>语文</Name><Type>文科</Type></Book><Book id=\"2\"><Name>数学</Name><Type>理科</Type></Book></Shop>";

            Document doc = DocumentHelper.parseText(xmlStr);

            Element rootElement = doc.getRootElement();

            List<Element> list = rootElement.elements("Book");

            for (Element e : list) {

                System.out.println("id-" + e.attributeValue("id").toString());

                System.out.println("Name-"

                        + e.element("Name").getTextTrim());

                System.out.println("Type-"

                        + e.element("Type").getTextTrim());

                System.out.println("path-"

                        + e.element("Type").getPath());

            }

             // 2、修改XML节点

            System.out.println("修改XML节点");

            for (Element e : list) {

                e.element("Type").setText(e.element("Type").getTextTrim()+"1");

            }

            System.out.println("输出XML字符串");

            System.out.println( doc.asXML());

             // 3、保存XML

            String path = System.getProperty("user.dir") + "\\" + "\\xml\\Doc"+java.util.UUID.randomUUID().toString() +".xml";

            Writer  write=new FileWriter(path);

            write.write(doc.asXML());

            write.flush();

            write.close();

            System.out.println("生成XML文件路径:"+path);

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

}

输出:

F:\Java2014Code\XMLDocument\\xml\Doc.xml
getNamespace:org.dom4j.Namespace@babe [Namespace: prefix mapped to URI ""]
节点名称-getName:Shop
getText:

1
语文
文科
2

数学
理科
3
英语
文科
StringToXML-字符串转换成XML对象
id-1
Name-语文
Type-文科
path-/Shop/Book/Type
id-2
Name-数学
Type-理科
path-/Shop/Book/Type
修改XML节点
输出XML字符串
<?xml version="1.0" encoding="UTF-8"?>
<Shop><Book id="1"><Name>语文</Name><Type>文科1</Type></Book><Book id="2"><Name>数学</Name><Type>理科1</Type></Book></Shop>

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