dom4j解析xml

1、user.xml如下：

<?xml version="1.0" encoding="UTF-8"?>
<users>
<user>
  <name>zhangsan</name>
  <age>24</age>
  <sex>man</sex>
</user>
<user>
  <name>lisi</name>
  <age>23</age>
  <sex>man</sex>
</user>
</users>



2.读取上面xml的文件如下:

public void readXml(String  path) throws DocumentException, FileNotFoundException{
  SAXReader reader=new SAXReader();
  Document doc=reader.read(new FileInputStream("D:/myeclipseworkspace/dom4j_xml/src/mxr/xml/test/user.xml"));
  Element root=doc.getRootElement();  
  for (Iterator iter = root.elementIterator(); iter.hasNext();) {
            Element element = (Element) iter.next();
            System.out.println(element.getName());
            for(Iterator it=element.elementIterator();it.hasNext();){
             Element e=(Element) it.next();
             System.out.println(e.getName()+"="+e.getText());
            }
        }
}

3、生成一个xml文件的代码如下：

public void createXML() throws IOException{
  //用工厂类创建一个document实例
  Document doc=DocumentHelper.createDocument();
  
  Element root=doc.addElement("books");
  //添加注释
  root.addComment("this is a book about xml");
  //添加子节点book
  Element book=root.addElement("book");
  //为book节点添加bookname属性
  Element bookname=book.addElement("bookname");
  //设置bookname的值
  bookname.setText("java  && java");
  
  //为book添加author属性
  Element author=book.addElement("author");
  //为author 属性设置数值
  author.setText("nobody&& nobody");
  
  //为book 添加price 属性
  Element price=book.addElement("price");
  //设置price的值
  price.setText("28.5");

  FileWriter out=new FileWriter("books.xml");
  //格式化输出,类型IE浏览一样
  OutputFormat format=OutputFormat.createPrettyPrint();
  format.setEncoding("utf-8");
  
  XMLWriter writer=new XMLWriter(out,format);
  writer.write(doc);
  writer.close();
  System.out.println("创建了xml文件");
}



4、最终生成的xml效果如下：

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

- <books>
- <!--
this is a book about xml  --> <script></script>
- <book>
  <bookname> java && java</bookname>
  <author> nobody&& nobody</author>
  <price> 28.5</price>
  </book>
  </books>