Rhythmk 一步一步学 JAVA (16) dom4j 操作XML

1、项目文件结构图：

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:Java2014CodeXMLDocument\xmlDoc.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>