利用dom4j进行简单的解析、创建XML文件

痛定思痛。 2022-03-10 09:54 117阅读 0赞

一、解析XML文件（要先下载配置好相应的jar包）

1、要解析的XML文件

<?xml version="1.0" encoding="UTF-8"?>
    
    <goodslist>
       <good id="1001">
          <price>12</price>
          <name>电视机</name>
          <place>北京</place>
       </good>
       <good id="1002">
          <price>13</price>
          <name>洗衣机</name>
          <place>上海</place>
       </good>
       <good id="1003">
          <price>14</price>
          <name>冰箱</name>
          <place>山东</place>
       </good>
       <Font style="宋体"></Font>
    </goodslist>

2、利用dom4j来进行解析

package testxml;
    import java.util.Iterator;
    import org.dom4j.Attribute;
    import org.dom4j.Document;
    import org.dom4j.DocumentException;
    import org.dom4j.Element;
    import org.dom4j.io.SAXReader;
    public class ParseXML {
    	public static void main(String[] args) throws DocumentException {
    		SAXReader reader = new SAXReader();
            Document document = reader.read("src/testxml/Txml.xml");
            Element root = document.getRootElement();//获得根元素
           // System.out.println(root.getName());//打印根元素的名称
           Iterator<Element> it = root.elementIterator();//获得子标签，存储在迭代器中
           while(it.hasNext()) {//遍历迭代器输出字标签的相关信息
        	   Element ele = it.next();
        	   System.out.println(ele.getName());
        	   Iterator<Attribute> att = ele.attributeIterator();//获得当前标签的属性，属性包含属性名以及属性值，存到迭代器中；
        	   while(att.hasNext()) {
        		   Attribute a = att.next();
        		   System.out.println(a.getName()+":"+a.getValue());
        	   }
        	   Iterator <Element> it1 = ele.elementIterator();
        	   while(it1.hasNext()) {
        		   Element ele1 = it1.next();
        		   System.out.println(ele1.getName());
        		   System.out.println(ele1.getText());
        	   }
           }
    	}
    }

3、解析结果：

good
    id:1001
    price
    12
    name
    电视机
    place
    北京
    good
    id:1002
    price
    13
    name
    洗衣机
    place
    上海
    good
    id:1003
    price
    14
    name
    冰箱
    place
    山东
    Font
    style:宋体

二、创建XML文件：

package testxml;
    import java.io.FileWriter;
    import java.io.IOException;
    import org.dom4j.Document;
    import org.dom4j.DocumentHelper;
    import org.dom4j.Element;
    import org.dom4j.io.XMLWriter;
    public class CreateXml {
       public static void main(String[] args) throws IOException {
    	   Document document = DocumentHelper.createDocument();
           Element root = document.addElement("root");//创建根元素
           Element author1 = root.addElement("author")//创建子标签 
               .addAttribute("name", "James")
               .addAttribute("location", "UK")
               .addText("James Strachan");
           Element author2 = root.addElement("author")
               .addAttribute("name", "Bob")
               .addAttribute("location", "US")
               .addText("Bob McWhirter");
           FileWriter fw = new FileWriter("foo.xml");
           XMLWriter xw = new XMLWriter(fw);
           xw.write(document);
           xw.close();
      }
    }

在同级目录下生成的XML文件：

<?xml version="1.0" encoding="UTF-8"?>
    <root>
    <author name="James" location="UK">James Strachan</author>
    <author name="Bob" location="US">Bob McWhirter</author>
    </root>