Java 使用dom4j操作xml文档

野性酷女 2023-06-27 12:46 7阅读 0赞

###                                                   Java 使用dom4j操作xml文档 ###

**一、简述**

**       ** 记--使用dom4j-2.0.2操作xml文档。创建xml文档，读取数据，包括添加、修改、删除、读取数据。

**二、效果**

![20200106222929655.gif][]

**三、工程结构**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70][]

**四、源文件**

**     **  XmlTest.java文件

import java.io.File;
    import java.io.FileOutputStream;
    import java.util.Iterator;
    import org.dom4j.Document;
    import org.dom4j.DocumentHelper;
    import org.dom4j.Element;
    import org.dom4j.Node;
    import org.dom4j.io.OutputFormat;
    import org.dom4j.io.SAXReader;
    import org.dom4j.io.XMLWriter;
    
    public class XmlTest {
    
    	//保存xml文档
    	public static void saveXmlDocument(Document document) throws Exception {		
    		OutputFormat format = OutputFormat.createPrettyPrint();
    		format.setEncoding("UTF-8");//设置编码
    		String fileName = document.getName().replace("file:///", "");//file:///D:/Proj/MyEclipse85/XmlTest/test.xml
    		//System.out.println(fileName);
    		XMLWriter writer = new XMLWriter(new FileOutputStream(fileName), format);
    		writer.write(document);
    		writer.flush();
    		writer.close();
    	}
    	
    	public static void main(String[] args) {
    		String fileName = "test.xml";
    		try {
    
    			File file = new File("test.xml"); 
    			if(!file.exists())//文件不存在
    			{
    				// 创建test.xml
    				Document newDocument = DocumentHelper.createDocument();
    				
    				//添加根节点
    				Element root = newDocument.addElement("Fruits");
    				
    				//添加子节点
    				Element elmentApple = root.addElement("Apple");
    				elmentApple.addElement("describe").addText("红彤彤的苹果");
    				elmentApple.addElement("price").addText("8元/斤");
    				
    				Element elmentOrange = root.addElement("Orange");
    				elmentOrange.addElement("describe").addText("黄澄澄的橙子");
    				elmentOrange.addElement("price").addText("6元/斤");
    				
    				Element elmentGrape = root.addElement("Grape");
    				elmentGrape.addElement("describe").addText("酸酸的葡萄");
    				elmentGrape.addElement("price").addText("10元/斤");
    				
    				newDocument.setName(fileName);//设置文档名称
    				saveXmlDocument(newDocument);//保存到磁盘
    				System.out.println("首次创建"+fileName);
    			}
    			else
    			{
    				SAXReader reader = new SAXReader();
    				Document document = reader.read(new File(fileName));				
    				Element rootNode = document.getRootElement();//获取根节点
    				System.out.println(fileName+"的数据如下:");
    				System.out.println("根节点:"+rootNode.getName());
    				// 遍历子节点
    				for (Iterator<?> iterator = rootNode.elementIterator(); iterator.hasNext();) {
    					Element element = (Element)iterator.next();	
    					String elementName = element.getName();
    					System.out.println("  " + elementName);//获取节点名称
    					int size = element.nodeCount();//获取子节点数目
    					for (int i = 0; i < size; i++) {//遍历二层子节点
    						Node nodeChild = element.node(i);
    						String typeName = nodeChild.getName();
    						if(typeName != null)
    						{
    							System.out.println("    "+typeName+"："+nodeChild.getText());
    							
    							//修改数据
    							if(elementName.equals("Grape"))
    							{
    								if(typeName.equals("describe"))//修改描述
    								{
    									nodeChild.setText("又脆又甜的葡萄");
    								}
    								else if(typeName.equals("price"))//修改价格
    								{
    									nodeChild.setText("16元/斤");
    								}
    							}
    						}
    					}
    					
    					//删除数据
    					if(elementName.equals("Orange"))
    					{
    						rootNode.remove(element);
    					}					
    				}
    				
    				//有改动数据就保存
    				saveXmlDocument(document);
    			}
    
    		}catch (Exception e) {
    			System.out.println("出现异常"+e.toString());
    			e.printStackTrace();
    		}
    
    	}
    }

**五、总结**

5.1 下载dom4j-xxx.jar包

网盘:链接: https://pan.baidu.com/s/1mt6Gg-49DEc0nvNMS8M1xw 提取码: uhgm

网址:[https://dom4j.github.io][https_dom4j.github.io]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70 1][]

5.2 添加dom4j-2.0.2.jar包

![20200106222456943.gif][]

[20200106222929655.gif]: https://img-blog.csdnimg.cn/20200106222929655.gif
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200106222953138.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk=,size_16,color_FFFFFF,t_70
[https_dom4j.github.io]: https://dom4j.github.io/
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200106221704440.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk=,size_16,color_FFFFFF,t_70
[20200106222456943.gif]: https://img-blog.csdnimg.cn/20200106222456943.gif