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  • java dom4j xml生成,解析

    1. 用Java代码生成xml文档

    package com.test.dom;
    
    import java.io.FileOutputStream;
    import java.io.IOException;
    
    import org.dom4j.Document;
    import org.dom4j.DocumentHelper;
    import org.dom4j.Element;
    import org.dom4j.io.OutputFormat;
    import org.dom4j.io.XMLWriter;
    
    public class Dom4jDemo {
    
        public static void main(String[] args) throws IOException {
            Document doc = DocumentHelper.createDocument();
            Element root = DocumentHelper.createElement("books");
    
            doc.setRootElement(root);
            root.addAttribute("id", "001");
            Element bookElement = root.addElement("book");
            Element titleElement = bookElement.addElement("title");
            titleElement.setText("Harry Potter");
    
            Element authorElement = bookElement.addElement("author");
            authorElement.setText("J K. Rowling");
    
            // 输出到控制台中
            XMLWriter xmlWriter = new XMLWriter();
            xmlWriter.write(doc);
    
            // 把生成的xml文档存放在硬盘上 true代表是否换行
            OutputFormat format = new OutputFormat("    ", true);
            format.setEncoding("GBK");// 设置编码格式
            XMLWriter fileXmlWriter = new XMLWriter(new FileOutputStream("e:/books.xml"), format);
    
            fileXmlWriter.write(doc);
            fileXmlWriter.close();
        }
    }

    xml结构

    <?xml version="1.0" encoding="GBK"?>
    <books id="001">
        <book>
            <title>Harry Potter</title>
            <author>J K. Rowling</author>
        </book>
    </books>

     2. 解析xml

       从String中获取

    String xmlStr = "<books>......</books>";  
    Document document = DocumentHelper.parseText(xmlStr); 

       从文件中获取

    //创建SAXReader对象  
     SAXReader reader = new SAXReader();  
    //读取文件 转换成Document  
      Document document = reader.read(new File("books.xml"));
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  • 原文地址:https://www.cnblogs.com/newlangwen/p/7708783.html
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