JAVA解析xml

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<contacts> 
    <tr>
        <td>4</td>
        <td>广州市鼎和机械设备有限公司44</td>
        <td>东莞市寮步镇石大路147号</td>
        <td>公海客户</td>
        <td>线下广告</td>
        <td>2022-05-10</td>
    </tr>
    <tr>
        <td>5</td>
        <td>广州市鼎和机械设备有限公司5555</td>
        <td>东莞市寮步镇石大路147号</td>
        <td>公海客户</td>
        <td>线下广告</td>
        <td>2022-05-10</td>
    </tr>
    <tr>
        <td>6</td>
        <td>广州市鼎和机械设备有限公司6666</td>
        <td>东莞市寮步镇石大路147号</td>
        <td>公海客户</td>
        <td>线下广告</td>
        <td>2022-05-10</td>
    </tr>
</contacts>

package com.swift.xml;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;

import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class APP5 {

    public static void main(String[] args) throws Exception {
        
        File f = new File("e:/contacts.xml");
        if(!f.exists()) return;
        System.out.println("xml存在");
        
        InputStream in=new FileInputStream(f);
        
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        Document document=factory.newDocumentBuilder().parse(in);
        
        Element root = document.getDocumentElement();//根节点
        
        NodeList nodeList = root.getElementsByTagName("tr");
        
        int length = nodeList.getLength();
        
        for(int i=0;i<length;i++)
        {
            Element oTr =(Element)nodeList.item(i);//得到<tr>
            NodeList tdList = oTr.getElementsByTagName("td");
            Element companyNameElel =(Element)tdList.item(1);
            String companyName = companyNameElel.getTextContent();
            System.out.println(companyName);
        }
        
        in.close();
        
    }

}