1. xml 类型发票格式

本文解析的xml类型的发票格式如下

2. 数据提取思路

通过遍历xml文件中的标签去获得标签对应的文本

2.1 项目结构

3. 提取实现

3.1 实体类

Invoice

package com.example.xml.entity;import lombok.Data;import java.util.Date;@Data
public class Invoice {private String invoiceNumber; // 发票号码private Date invoiceDate; // 开票日期private String totalAmount;// 总开票金额private String invoiceRemarks;// 发票备注
}

3.2 提取工具类

package com.example.xml.utils;import com.example.xml.entity.Invoice;
import org.dom4j.io.SAXReader;import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.springframework.web.multipart.MultipartFile;public class XmlUtils {/*** 调用该方法将前端接受到的文件暂存** @param file*/public static Invoice parseXmlFile(MultipartFile file) {Invoice invoice = new Invoice();File tempFilePath=null;try {// 创建一个临时文件Path tempFile = null;tempFile = Files.createTempFile("tempPrefix", ".xml");tempFilePath = tempFile.toFile();// 将MultipartFile的内容写入到临时文件try (FileOutputStream fos = new FileOutputStream(tempFilePath)) {fos.write(file.getBytes());}// 使用临时文件的路径来调用你的解析方法invoice = extract(tempFilePath);// 删除临时文件，或者在某些情况下保留它
//            tempFilePath.delete();} catch (Exception e) {// 处理异常e.printStackTrace();}finally {// 无论是否发生异常，都尝试删除临时文件if (tempFilePath != null && !tempFilePath.delete()) {// 记录删除失败的情况System.err.println("无法删除临时文件: " + tempFilePath.getAbsolutePath());}}// 返回值return invoice;}/*** 从一个ZIP 文件中提取特定格式的发票信息，并构建一个 Invoice 对象来存储这些信息** @param file* @return* @throws IOException* @throws DocumentException*/public static Invoice extract(File file) throws DocumentException, ParseException {Invoice invoice = new Invoice();//创建发票实例SAXReader reader = new SAXReader();Document document = reader.read(file);// 读取XML文件// 获取备注中的部分信息Element root = document.getRootElement(); // <EInvoice>Element eInvoiceData = root.element("EInvoiceData"); // <EInvoiceData>// 备注中的销方信息提取Element sellerInformation = eInvoiceData.element("SellerInformation"); // <SellerInformation>Element sellerBankName = sellerInformation.element("SellerBankName");Element sellerBankAccNum = sellerInformation.element("SellerBankAccNum");String sellerBankNameValue="";String sellerBankAccNumValue="";if(sellerBankName!=null){sellerBankNameValue = sellerBankName.getTextTrim();//获取<SellerBankName>的文本内容【销方开户银行】}if(sellerBankAccNum!=null){sellerBankAccNumValue = sellerBankAccNum.getTextTrim();//获取<SellerBankAccNum>的文本内容【销方银行账号】}// 备注中的购方信息提取Element buyerInformation = eInvoiceData.element("BuyerInformation"); // <BuyerInformation>Element buyerBankName = buyerInformation.element("BuyerBankName");Element buyerBankAccNum = buyerInformation.element("BuyerBankAccNum");String buyerBankNameValue="";String buyerBankAccNumValue="";if(buyerBankName!=null){buyerBankNameValue = buyerBankName.getTextTrim();//获取<BuyerBankName>的文本内容【购方开户银行】}if(buyerBankAccNum!=null){buyerBankAccNumValue = buyerBankAccNum.getTextTrim();//获取<BuyerBankAccNum>的文本内容【购方银行账号】}// 开票金额提取Element issuItemInformation = eInvoiceData.element("IssuItemInformation"); // <IssuItemInformation>Element totalAmount = issuItemInformation.element("TotaltaxIncludedAmount"); // <TotaltaxIncludedAmount>String totalAmountValue="";if(totalAmount!=null){totalAmountValue = totalAmount.getTextTrim();// 获取<TotaltaxIncludedAmount>的文本内容}// 发票号码Element taxSupervisionInfo = root.element("TaxSupervisionInfo"); // <TaxSupervisionInfo>Element invoiceNumber = taxSupervisionInfo.element("InvoiceNumber");String invoiceNumberValue="";if(invoiceNumber!=null){invoiceNumberValue = invoiceNumber.getTextTrim();//获取<InvoiceNumber>的文本内容【发票号码】}//开票日期Element issueTime = taxSupervisionInfo.element("IssueTime");String issueTimeValue="";if(issueTime!=null){issueTimeValue = issueTime.getTextTrim();//获取<IssueTime>的文本内容【开票日期】}//创建Invoice实例，并填充发票信息if (invoiceNumberValue != null && invoiceNumberValue != "") {//发票号码invoice.setInvoiceNumber(invoiceNumberValue);}if (issueTimeValue != null && issueTimeValue != "") {//开票日期SimpleDateFormat inputDateFormat = new SimpleDateFormat("yyyy-MM-dd");Date parsedDate = inputDateFormat.parse(issueTimeValue);invoice.setInvoiceDate(parsedDate);}if (totalAmountValue != null && totalAmountValue != "") {// 开票金额invoice.setTotalAmount(totalAmountValue);}//在设置之前排好发票备注的版型String note = setNote(buyerBankNameValue, buyerBankAccNumValue, sellerBankNameValue, sellerBankAccNumValue);invoice.setInvoiceRemarks(note);return invoice;}/*** 拼接备注信息** @param buyerBankNameValue    购方开户银行* @param buyerBankAccNumValue  购方银行账号* @param sellerBankNameValue   销方开户银行* @param sellerBankAccNumValue 销方银行账号* @return*/public static String setNote(String buyerBankNameValue, String buyerBankAccNumValue, String sellerBankNameValue, String sellerBankAccNumValue) {String resultNote = "";if (buyerBankNameValue != null && buyerBankNameValue != "") {resultNote += "购方开户银行：" + buyerBankNameValue + ";";}if (buyerBankAccNumValue != null && buyerBankAccNumValue != "") {resultNote += "银行账号：" + buyerBankAccNumValue + ";";}if (sellerBankNameValue != null && sellerBankNameValue != "") {resultNote += "销方开户银行：" + sellerBankNameValue + ";";}if (sellerBankAccNumValue != null && sellerBankAccNumValue != "") {resultNote += "银行账号：" + sellerBankAccNumValue + ";";}return resultNote;}}

3.3 controller

package com.example.xml.controller;import com.example.xml.entity.Invoice;
import com.example.xml.service.InvoiceService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;@RestController
@RequestMapping("/invoice")
public class InvoiceController {@AutowiredInvoiceService invoiceService;/*** @param*/@CrossOrigin(origins = "http://localhost:8081", allowedHeaders = "*", allowCredentials = "true")@PostMapping("/upload")public ResponseEntity<Object> uploadFile(@RequestParam("file") MultipartFile file) {try {// 调用你的文件解析服务Invoice parsedData = invoiceService.parseOfdFile(file);// 返回解析后的数据return ResponseEntity.ok(parsedData);} catch (Exception e) {return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("Error parsing file");}}
}

3.4 service

InvoiceService

package com.example.xml.service;import com.example.xml.entity.Invoice;
import org.springframework.web.multipart.MultipartFile;public interface InvoiceService {Invoice parseOfdFile(MultipartFile file);}

InvoiceServiceImpl

package com.example.xml.service.impl;import com.example.xml.entity.Invoice;
import com.example.xml.service.InvoiceService;
import com.example.xml.utils.XmlUtils;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;@Service
public class InvoiceServiceImpl implements InvoiceService {@Overridepublic Invoice parseOfdFile(MultipartFile file) {Invoice invoice = XmlUtils.parseXmlFile(file);return invoice;}
}

4. 结果展示

postman测试结果如下