Java解析pdf格式发票的代码实现

目录

• 发票样式
• 发票内容解析
• 引用Maven
• 获取PDF内容
• 文本内容(部分内容以*替代)
• 解析文件内容，返回数据
• 初版测试
• 优化代码

发票样式

发票内容解析

引用Maven

使用pdfbox

<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>pdfbox</artifactId>
    <version>2.0.24</version> <!-- 请检查最新版本 -->
</dependency>

获取PDF内容

设置 sortByPosition 为 true 可以按文本位置提取内容，否则获取到的内容错乱，无法获取到真正需要的内容

    @RequestMapping("uploadReceiptsTest")
    @ResponseBody
    public Map<String,String> uploadReceiptsTest() throws Exception{
        String filePath = "D:/apache-tomcat-8.5.98/webapps/tspspic/发票文件/24372000000145100092.pdf"; // 保存路径
        PDDocument document = PDDocument.load(new File(filePath));
        PDFTextStripper pdfStripper = new PDFTextStripper();
        // 排序文本行按其位置
        pdfStripper.setSortByPosition(true);
        String text = pdfStripper.getText(document);
        document.close();
        Map<String, String> map = pdfStr(text);
        return map;
    }

文本内容(部分内容以*替代)

    public static void main(String[] args) {
        String invoiceInfo = "电子发票（普通发票） 发票号码：******\n" +
                             "开票日期：******\n" +
                             "购 名称：****** 销 名称：******\n" +
                             "买 售\n" +
                             "方 方\n" +
                             "信 统一社会信用代码/纳税人识别号：****** 信 统一社会信用代码/纳税人识别号：******\n" +
                             "息 息\n" +
                             "项目名称 规格型号 单 位 数 量 单 价 金 额 税率/征收率 税 额\n" +
                             "******* 100ml：5g 袋 800 4.070796 python3256.64 13% 423.36\n" +
                             "******\n" +
                             "合 计 3256.64 423.36\n" +
                             "价税合计（大写） 叁仟陆佰捌拾圆整 （小写）3680.00\n" +
                             "批号：******/ 生产日期：2024-05-15/ 有效期至:2026-04-30/ 含税单价：4.6000/ 生产厂家:******/ 批准文号:******/\n" +
                             "备 注\n" +
                             "开票人：王宁\n" +
                             "王宁";

解析文件内容，返回数据

初版测试

    public Map<String,String> pdfStr(String invoiceInfo) {
 		//因解析出的括号不确定为中文还是英文，统一替换为英文字符
        invoiceInfo = invoiceInfo.replaceAll("（","(").replaceAll("）",")");
        // 定义正则表达式模式
        Pattern patternInvoiceNumber = Pattern.compile("发票号码：(\\d+)");
        Pattern patternInvoiceDate = Pattern.compile("开票日期：(\\d{4}年\\d{1,2}月\\d{1,2}日)");
        Pattern patternBuyerName = Pattern.compile("购 名称：(.+?) 销 名称：(.+?)\n");
        //由上图可以发现“项目名称 规格型号 单 位 数 量 单 价 金 额 税率/征收率 税 额”所需要的内容在下一行数据，使用笨方法直接获取“税额与合计”之间的数据通过之后的空格分割进行获取数据
        Pattern patternItemDetails = Pattern.compile("税 额\\s+(.*?)合 计", Pattern.DOTALL);
        Pattern patternTotal = Pattern.compile("\\(小写\\)(\\d+(\\.\\d+)?)");
        Pattern patternBATchNumber = Pattern.compile("批号：(.+?)/");
        Pattern patternProductionDate = Pattern.compile("生产日期：(\\d{4}-\\d{1,2}-\\d{1,2})/");
        Pattern patternExpirationDate = Pattern.compile("有效期至:(\\d{4}-\\d{1,2}-\\d{1,2})/");
        Patte编程rn patternTaxIncludedPrice = Pattern.compile("含税单价：(\\d+(\\.\\d+)?)");
        Pattern patternManufacturer = Pattern.compile("生产厂家:(.+?)/");
        Pattern patternApprovalNumber = Pattern.compile("批准文号:(.+?)/");
        Pattern patternIssuer = Pattern.compile("开票人：(.+)");

        // 创建Matcher对象
        Matcher matcherInvoiceNumber = patternInvoiceNumber.matcher(invoiceInfo);
        Matcher matcherInvoiceDate = patternInvoiceDate.matcher(invoiceInfo);
        Matcher matcherBuyerName = patternBuyerName.matcher(invoiceInfo);
        Matcher matcherItemDetails = patternItemDetails.matcher(invoiceInfo);
        Matcher matcherTotal = patternTotal.matcher(invoiceInfo);
        Matcher matcherBatchNumber = patternBatchNumber.matcher(invoiceInfo);
        Matcher matcherProductionDate = patternProductionDate.matcher(invoiceInfo);
        Matcher matcherExpirationDate = patternExpirationDate.matcher(invoiceInfo);
        Matcher matcherTaxIncludedPrice = patternTaxIncludedPrice.matcher(invoiceInfo);
        Matcher matcherManufacturer = patternManufacturer.matcher(invoicphpeInfo);
        Matcher matcherApprovalNumber = patternApprovalNumber.matcher(invoiceInfo);
        Matcher matcherIssuer = patternIssuer.matcher(invoiceInfo);

        // 提取数据
        String invoiceNumber = "";
        String invoiceDate = "";
        String buyerName = "";
        String sellerName = "";
        String productNajavascriptme = "";
        String specification = "";
        String unit = "";
        int quantity = 0;
        double unitPrice = 0.0;
        double amount = 0.0;
        String taxRate = "";
        double taxAmount = 0.0;
        double total = 0.0;
        String batchNumber = "";
        String productionDate = "";
        String expirationDate = "";
        double taxIncludedPrice = 0.0;
        String manufacturer = "";
        String approvalNumber = "";
        String issuer = "";

        if (matcherInvoiceNumber.find()) {
            invoiceNumber = matcherInvoiceNumber.group(1);
        }

        if (matcherInvoiceDate.find()) {
            invoiceDate = matcherInvoiceDate.group(1);
        }

        if (matcherBuyerName.find()) {
            buyerName = matcherBuyerName.group(1);
            sellerName = matcherBuyerName.group(2);
        }

        // 处理项目名称、规格型号、单位、数量、单价、金额、税率/征收率、税额
        if (matcherItemDetails.find()) {
            String itemDetailsLine = matcherItemDetails.group(1).trim();
            itemDetailsLine = itemDetailsLine.replace("\n"," ");
            phpString[] details = itemDetailsLine.split(" "); // 按空格分割

            if (details.length >= 8) { // 确保有足够的字段
            //因部分名称过长，换行数据解析到最后进行拼接
                productName = details[0].trim(); // 项目名称
                if (details.length >= 9){
                    productName = details[0].trim()+details[8].trim(); // 项目名称
                }
                specification = details[1].trim(); // 规格型号
                unit = details[2].trim(); // 单位
                quantity = Integer.parseInt(details[3].trim()); // 数量
                unitPrice = Double.parseDouble(details[4].trim()); // 单价
                amount = Double.parseDouble(details[5].trim()); // 金额
                taxRate = details[6].trim(); // 税率/征收率
                taxAmount = Double.parseDouble(details[7].trim()); // 税额

                System.out.println("项目名称: " + productName);
                System.out.println("规格型号: " + specification);
                System.out.println("单位: " + unit);
                System.out.println("数量: " + quantity);
                System.out.println("单价: " + unitPrice);
                System.out.println("金额: " + amount);
                System.out.println("税率/征收率: " + taxRate);
                System.out.println("税额: " + taxAmount);
            }
        }

        if (matcherTotal.find()) {
            total = Double.parseDouble(matcherTotal.group(1));
        }

        if (matcherBatchNumber.find()) {
            batchNumber = matcherBatchNumber.group(1);
        }

        if (matcherProductionDate.find()) {
            productionDate = matcherProductionDate.group(1);
        }

        if (matcherExpirationDate.find()) {
            expirationDate = matcherExpirationDate.group(1);
        }

        if (matcherTaxIncludedPrice.find()) {
            taxIncludedPrice = Double.parseDouble(matcherTaxIncludedPrice.group(1));
        }

        if (matcherManufacturer.find()) {
            manufacturer = matcherManufacturer.group(1);
        }

        if (matcherApprovalNumber.find()) {
            approvalNumber = matcherApprovalNumber.group(1);
        }

        if (matcherIssuer.find()) {
            issuer = matcherIssuer.group(1);
        }

        // 输出其他结果
        System.out.println("发票号码: " + invoiceNumber);
        System.out.println("开票日期: " + invoiceDate);
        System.out.println("购买方名称: " + buyerName);
        System.out.println("销售方名称: " + sellerName);
        System.out.println("价税合计: " + total);
        System.out.println("批号: " + batchNumber);
        System.out.println("生产日期: " + productionDate);
        System.out.println("有效期至: " + expirationDate);
        System.out.println("含税单价: " + taxIncludedPrice);
        System.out.println("生产厂家: " + manufacturer);
        System.out.println("批准文号: " + approvalNumber);
        System.out.println("开票人: " + issuer);
    }

优化代码

• Map存储正则表达式：将所有正则表达式模式和对应的字段名称存储在一个Map中，遍历Map并执行匹配，从而避免了为每个字段都写单独的匹配代码。

• 抽取通用逻辑：将匹配逻辑抽象成一个通用方法，简化了代码结构，减少了重复代码。

• 处理商品详情：在匹配完itemDetails后，再拆分字符串并填充对应的字段。

    public static Map<String, String> pdfStr(String invoiceInfo) {
        invoiceInfo = invoiceInfo.replaceAll("（", "(").replaceAll("）", ")");

        // 定义正则表达式模式
        Map<String, String> patterns = new HashMap<>();
        patterns.put("invoiceNumber", "发票号码：(\\d+)");
        patterns.put("invoiceDate", "开票日期：(\\d{4}年\\d{1,2}月\\d{1,2}日)");
        patterns.put("buyerName", "购 名称：(.+?) 销 名称：(.+?)\n");
        patterns.put("itemDetails", "税 额\\s+(.*?)合 计");
        patterns.put("total", "\\(小写\\)(\\d+(\\.\\d+)?)");
        patterns.put("batchNumber", "批号：(.+?)/");
        patterns.put("productionDate", "生产日期：(\\d{4}-\\d{1,2}-\\d{1,2})/");
        patterns.put("expirationDate", "有效期至:(\\d{4}-\\d{1,2}-\\d{1,2})/");
        patterns.put("taxIncludedPrice", "含税单价：(\\d+(\\.\\d+)?)");
        patterns.put("manufacturer", "生产厂家:(.+?)/");
        patterns.put("approvalNumber", "批准文号:(.+?)/");
        patterns.put("issuer", "开票人：(.+)");

        // 提取数据
        Map<String, String> result = new HashMap<>();

        for (Map.Entry<String, String> entry : patterns.entrySet()) {
            Pattern pattern = Pattern.compile(entry.getValue(), Pattern.DOTALL);
            Matcher matcher = pattern.matcher(invoiceInfo);
            if (matcher.find()) {
                result.put(entry.getKey(), matcher.group(1).trim());
            }
        }

        // 处理项目名称、规格型号、单位、数量、单价、金额、税率/征收率、税额
        if (result.containsKey("itemDetails")) {
            String[] details = result.get("itemDetails").replace("\n", " ").split(" ");
            if (details.length >= 8) {
                result.put("productName", details[0].trim() + (details.length > 8 ? details[8].trim() : ""));
                result.put("specification", details[1].trim());
                result.put("unit", details[2].trim());
                result.put("quantity", details[3].trim());
                result.put("unitPrice", details[4].trim());
                result.put("amount", details[5].trim());
                result.put("taxRate", details[6].trim());
                result.put("taxAmount", details[7].trim());
            }
        }

        // 打印结果
        for (Map.Entry<String, String> entry : result.entrySet()) {
            System.out.println(entry.getKey() + ": " + entry.getValue());
        }

        return result;
    }

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