XML解析

Posted 2020-10-26 北极丶光

package com.hxgd.ms.readfile;

import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
//生成xml格式的字符串
public class CreateXml {
    /* 依赖  dom4j
　　<dependency>
　　　　　　<groupId>dom4j</groupId>
　　　　　　<artifactId>dom4j</artifactId>
　　　　　　<version>1.6.1</version>
　　</dependency>
*/

public static void main(String[] args) {
        //生成xml格式的字符串

　　　　<?xml version="1.0" encoding="UTF-8"?>
　　　　<User><name>张三</name><age>18</age><gender sex="男">男</gender></User>

　　　　　　Document document2 = DocumentHelper.createDocument();

        Element ele = document2.addElement("User");
        Element elename = ele.addElement("name");
        elename.setText("张三");
        Element eleage = ele.addElement("age");
        eleage.setText("18");
        Element elegender = ele.addElement("gender");    
        elegender.setAttributeValue("sex", "男");
        elegender.setText("男");
        String asXML2 = document2.asXML();
        System.err.println(asXML2);       
    }
}

//解析xml文件或者解析xml格式的字符蠢
public static void readXml() {
        //引入jar包
        //创建解析器
        //创建SAXReader对象读取.xml文件
        SAXReader sax=new SAXReader();
        //获取dom树
        Document document = null;
        try {
            //读取XML文件
            document = sax.read(new File("product.xml"));
        } catch (DocumentException e) {
            e.printStackTrace();
        }
        
        /*解析 xml字符串
         * String xml ="xml字符串";
        try {
            Document document2 = sax.read(new ByteArrayInputStream(xml.getBytes("UTF-8")));
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }*/
        //获取根元素
        Element rootElement = document.getRootElement();
        
        //获取所有子元素
        Iterator<Element> iterator = rootElement.elementIterator();
        while(iterator.hasNext()){
            //拿到属性方法一
            Element element = iterator.next();
//            Attribute attribute = element.attribute("ID");
//            String value = attribute.getText();
//            System.err.println(attribute.getName()+"--->"+value);
            
            //拿到属性方法二
            List<Attribute> list = element.attributes();
            for(Attribute a:list){
                System.out.println(a.getName()+"-----"+a.getText());
            }
            Iterator<Element> iterator2 = element.elementIterator();
            while(iterator2.hasNext()){
                Element next = iterator2.next();
                System.out.println(next.getName()+"-->"+next.getText());
            }
            System.out.println();
            }
}