Java动态写入Word模板并返回给前端

1.解决方案思路

        读入word文档，遍历段落和表格，替换表格中的模板文字，返回保存或返回给前端

2.依赖

        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>5.2.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>5.2.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-scratchpad</artifactId>
            <version>3.17</version>
        </dependency>
        <!--     poi模板导入，主力包      -->
        <dependency>
            <groupId>com.deepoove</groupId>
            <artifactId>poi-tl</artifactId>
            <version>1.12.1</version>
        </dependency>

3.具体代码 

        注意读取文档时使用的是读取 .docx 格式文档的方法，.doc的读取方式不一样

        3.1 写入要填充的模板和数据

    @GetMapping("/downloadWord")
    public void downloadWord(HttpServletResponse response) throws IOException {

        // 要填充的数据
        Map<String, String> data = new HashMap<>();
        data.put("collegeName","2342");
        data.put("isTrue","☑");
        fillTemplate(response,data);
    }

        3.2 遍历段落和表格

 private static void fillTemplate(HttpServletResponse response, Map<String, String> data) throws FileNotFoundException {
        File file = ResourceUtils.getFile("本科教学课程总结表Out.docx");
        String absolutePath = file.getAbsolutePath();
        try (FileInputStream fis = new FileInputStream( ResourceUtils.getFile("classpath:本科教学课程总结表.docx"));
             XWPFDocument document = new XWPFDocument(fis);
             FileOutputStream fos = new FileOutputStream(absolutePath)) {

            // 遍历每个段落
            for (XWPFParagraph paragraph : document.getParagraphs()) {
                for (Map.Entry<String, String> entry : data.entrySet()) {
                    replacePlaceholder(paragraph, entry.getKey(), entry.getValue());
                }
            }
            //遍历每个表格
            for(XWPFTable table : document.getTables()){
                for(XWPFTableRow row : table.getRows()){
                    for(XWPFTableCell cell : row.getTableCells()){
                        for(XWPFParagraph paragraph : cell.getParagraphs()){
                            for(Map.Entry<String, String> entry : data.entrySet()){
                                replacePlaceholder(paragraph, entry.getKey(), entry.getValue());
                            }
                        }
                    }
                }
            }

            // 保存填充后的文档
            document.write(fos);
            System.out.println("生成的文档已保存到: " + absolutePath);

            File outFile = new File(absolutePath);
            InputStream is = new BufferedInputStream(Files.newInputStream(outFile.toPath()));
            ServletOutputStream outputStream = response.getOutputStream();
            response.setContentType("application/msword;charset=utf-8");
            // 设置文件名
            response.addHeader("Content-Disposition", "attachment;fileame=" + new String("课程总结报告".getBytes(StandardCharsets.UTF_8), StandardCharsets.ISO_8859_1));

            byte[] buffer = new byte[1024];
            int len;

            //从输入流中读取一定数量的字节，并将其存储在缓冲区字节数组中，读到末尾返回-1
            while((len = is.read(buffer)) > 0){
                System.out.println(len);
                outputStream.write(buffer, 0, len);
            }
            outputStream.flush();
            outputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

        3.3 替换数据

private static void replacePlaceholder(XWPFParagraph paragraph, String placeholder, String value) {
        for (XWPFRun run : paragraph.getRuns()) {
            String text = run.getText(0);
            if (text != null && text.contains(placeholder )) {
                text = text.replace( placeholder, value);
                run.setText(text, 0);
            }
        }
    }

4.给文档提前填充待替换数据