XML解析技术-DOM4J解析--修改xml文档

import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;
import java.util.Iterator;
import java.util.List;
import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;
 
public class Dom4JXML {
   
    public void updateXML(){
        try {
            //创建读入对象
            SAXReader reader = new SAXReader();
            //创建document实例
            Document doc = reader.read("D:\\tests.xml");
            //查找节点emp下的id属性
            List listAttr = doc.selectNodes("/tests/test/@id");
            Iterator itAttr = listAttr.iterator();
            while(itAttr.hasNext()){
                Attribute attr = (Attribute) itAttr.next();
                //emp属性修改为001
                attr.setValue("001");
            }
            //查找emp下的name节点
            List listText = doc.selectNodes("/tests/test/name");
            Iterator itText = listText.iterator();
            while(itText.hasNext()){
                Element textEle = (Element) itText.next();
                //name节点的文本内容修改为"张三"
                textEle.setText("张三");
            }
            //查找emp节点
            List listEle = doc.selectNodes("/tests/test");
            Iterator itEle = listEle.iterator();
            while(itEle.hasNext()){
                Element empEle = (Element) itEle.next();
                //查找emp下的sex节点
                Iterator itSex = empEle.elementIterator("sex");
                while(itSex.hasNext()){
                    Element sexEle = (Element) itSex.next();
                    //删除sex节点
                    empEle.remove(sexEle);
                }
            }
            //创建写出流
            Writer out = new FileWriter("D:\\tests(update).xml");
            // 格式化输出
            OutputFormat format = OutputFormat.createPrettyPrint();
            //OutputFormat format = OutputFormat.createCompactFormat();
            format.setEncoding("UTF-8");
            //创建写出对象
            XMLWriter writer = new XMLWriter(out,format);
            writer.write(doc);
            writer.close();
            System.out.println("生成tests(update).xml成功。");
           
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
       
    }
    publicstaticvoid main(String[] args) {
        new Dom4JXML().updateXML();
    }
}