同java的dom解析xml并封装为对象

xml文件

<order>
    <user_info>
        <name type="string">订单1</name>
        <address type="string">京东</address>
        <phone type="string">15056932222</phone>
        <good_list>
            <goods_item>
                <goods_name type="string">mate70</goods_name>
                <goods_number type="int">1</goods_number>
                <goods_price type="string">5999.0</goods_price>
            </goods_item>
            <goods_item>
                <goods_name type="string">iPhone16promax</goods_name>
                <goods_number type="int">1</goods_number>
                <goods_price type="string">9999.0</goods_price>
            </goods_item>
            <goods_item>
                <goods_name type="string">红富士苹果</goods_name>
                <goods_number type="int">3</goods_number>
                <goods_price type="string">99.0</goods_price>
            </goods_item>
        </good_list>
    </user_info>
    <user_info>
        <name type="string">订单2</name>
        <address type="string">淘宝</address>
        <phone type="string">15956932231</phone>
        <good_list>
            <goods_item>
                <goods_name type="string">草莓</goods_name>
                <goods_number type="int">3</goods_number>
                <goods_price type="string">99.0</goods_price>
            </goods_item>
            <goods_item>
                <goods_name type="string">爱奇艺会员</goods_name>
                <goods_number type="int">1</goods_number>
                <goods_price type="string">30.0</goods_price>
            </goods_item>
            <goods_item>
                <goods_name type="string">nike</goods_name>
                <goods_number type="int">1</goods_number>
                <goods_price type="string">999.0</goods_price>
            </goods_item>
        </good_list>
    </user_info>
</order>

java实体类

Order

import java.util.List;

public class Order {
    private List<UserInfo> userInfo;

    public List<UserInfo> getUserInfo() {
        return userInfo;
    }

    public void setUserInfo(List<UserInfo> userInfo) {
        this.userInfo = userInfo;
    }

    @Override
    public String toString() {
        return "Order{" +
                "userInfo=" + userInfo +
                '}';
    }
}

UserInfo

import java.util.List;

public class UserInfo {
    private String name;
    private String address;
    private String phone;
    private List<GoodsItem> goodList;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public List<GoodsItem> getGoodList() {
        return goodList;
    }

    public void setGoodList(List<GoodsItem> goodList) {
        this.goodList = goodList;
    }

    @Override
    public String toString() {
        return "UserInfo{" +
                "name='" + name + '\'' +
                ", address='" + address + '\'' +
                ", phone='" + phone + '\'' +
                ", goodList=" + goodList +
                '}';
    }
}

GoodsItem

public class GoodsItem {
    private String goodsName;
    private int goodsNumber;
    private String goodsPrice;

    public String getGoodsName() {
        return goodsName;
    }

    public void setGoodsName(String goodsName) {
        this.goodsName = goodsName;
    }

    public int getGoodsNumber() {
        return goodsNumber;
    }

    public void setGoodsNumber(int goodsNumber) {
        this.goodsNumber = goodsNumber;
    }

    public String getGoodsPrice() {
        return goodsPrice;
    }

    public void setGoodsPrice(String goodsPrice) {
        this.goodsPrice = goodsPrice;
    }

    @Override
    public String toString() {
        return "GoodsItem{" +
                "goodsName='" + goodsName + '\'' +
                ", goodsNumber=" + goodsNumber +
                ", goodsPrice='" + goodsPrice + '\'' +
                '}';
    }
}

解析xml文件并封装对象

import org.w3c.dom.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import java.io.File;
import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        try {
            // Load the XML file
            File xmlFile = new File("path/to/your/order.xml");

            // Create a DocumentBuilder
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();

            // Parse the XML file to get the Document
            Document document = builder.parse(xmlFile);

            // Normalize the XML structure
            document.getDocumentElement().normalize();

            // Get the root element
            Element root = document.getDocumentElement();

            // Create an Order object
            Order order = new Order();

            // Parse user_info elements
            List<UserInfo> userInfoList = new ArrayList<>();
            NodeList userInfoNodes = root.getElementsByTagName("user_info");

            for (int i = 0; i < userInfoNodes.getLength(); i++) {
                Node userInfoNode = userInfoNodes.item(i);

                if (userInfoNode.getNodeType() == Node.ELEMENT_NODE) {
                    Element userInfoElement = (Element) userInfoNode;

                    // Create a UserInfo object
                    UserInfo userInfo = new UserInfo();

                    // Parse name, address, and phone
                    userInfo.setName(userInfoElement.getElementsByTagName("name").item(0).getTextContent());
                    userInfo.setAddress(userInfoElement.getElementsByTagName("address").item(0).getTextContent());
                    userInfo.setPhone(userInfoElement.getElementsByTagName("phone").item(0).getTextContent());

                    // Parse good_list
                    List<GoodsItem> goodList = new ArrayList<>();
                    Element goodListElement = (Element) userInfoElement.getElementsByTagName("good_list").item(0);
                    NodeList goodsItemNodes = goodListElement.getElementsByTagName("goods_item");

                    for (int j = 0; j < goodsItemNodes.getLength(); j++) {
                        Node goodsItemNode = goodsItemNodes.item(j);

                        if (goodsItemNode.getNodeType() == Node.ELEMENT_NODE) {
                            Element goodsItemElement = (Element) goodsItemNode;

                            // Create a GoodsItem object
                            GoodsItem goodsItem = new GoodsItem();
                            goodsItem.setGoodsName(goodsItemElement.getElementsByTagName("goods_name").item(0).getTextContent());
                            goodsItem.setGoodsNumber(Integer.parseInt(goodsItemElement.getElementsByTagName("goods_number").item(0).getTextContent()));
                            goodsItem.setGoodsPrice(goodsItemElement.getElementsByTagName("goods_price").item(0).getTextContent());

                            // Add to the goodList
                            goodList.add(goodsItem);
                        }
                    }

                    // Set the goodList in UserInfo
                    userInfo.setGoodList(goodList);

                    // Add to the userInfoList
                    userInfoList.add(userInfo);
                }
            }

            // Set the userInfoList in Order
            order.setUserInfo(userInfoList);

            // Print the parsed data
            System.out.println(order);

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}