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需求：查询数据放入word模板中并在前端导出下载

解决方法：在模板的位置定义参数如 {{name}}  {{age}}等等，使用 poi 处理

伪代码：

    @PostMapping("/practiceAppr")public AjaxResult practiceAppr(OutputStream outputStream, @RequestBody ExportToExcelParamDto paramDto) {//查询数据  ExportToWordByPracticeApprDto 为定义的模板中的参数ExportToWordByPracticeApprDto app= baseService.practiceApprExport(paramDto);try {//获取模板文件try (InputStream is = TrActivityGroupServiceImpl.class.getClassLoader().getResourceAsStream("word/导出模板A4.docx")) {try (XWPFDocument doc = new XWPFDocument(is)) {Map<String, Object> replaceMap = BeanUtil.beanToMap(app);Map<String, Object> resultMap = new HashMap<>();//word中的占位符格式是{{}}replaceMap.forEach((placeholder, replacement) -> resultMap.put("{{" + placeholder + "}}", replacement));//处理文件替换参数为实际值replacePlaceholders(doc, resultMap);doc.write(outputStream);outputStream.close();is.close();}}} catch (Exception e) {logger.error("文件导出错误{}", e.getMessage());}return null;}private void replacePlaceholders(XWPFDocument document, Map<String, Object> placeholders) throws IOException, InvalidFormatException {//处理普通word文字 不包含表格for (XWPFParagraph paragraph : document.getParagraphs()) {List<XWPFRun> runs = paragraph.getRuns();for (XWPFRun run : runs) {String text = run.getText(0);if (text != null) {for (Map.Entry<String, Object> entry : placeholders.entrySet()) {if (text.contains(entry.getKey())) {text = text.replace(entry.getKey(), entry.getValue() != null ? (String) entry.getValue() : "");run.setText(text, 0);}}}}}// 处理替换表格中的占位符for (XWPFTable table : document.getTables()) {for (XWPFTableRow row : table.getRows()) {for (XWPFTableCell cell : row.getTableCells()) {for (XWPFParagraph paragraph : cell.getParagraphs()) {List<XWPFRun> runs = paragraph.getRuns();for (XWPFRun run : runs) {String text = run.getText(0);if (text != null) {for (Map.Entry<String, Object> entry : placeholders.entrySet()) {if (text.contains(entry.getKey())) {//获取、处理图片略......int format = XWPFDocument.PICTURE_TYPE_PNG;//图片地址BufferedImage image = ImageIO.read(new URL(value));ByteArrayOutputStream outputStream = new ByteArrayOutputStream();//suffix为图片的后缀 .pngImageIO.write(image, suffix, outputStream);byte[] imageBytes = outputStream.toByteArray();//后两个参数是宽高run.addPicture(new ByteArrayInputStream(imageBytes), format, fileName, Units.toEMU(80), Units.toEMU(40));//替换文字  图片和文字如果都展示text = text.replace(entry.getKey(), entry.getValue() != null ? (String) entry.getValue() : "");run.setText(text, 0);}}}}}}}}}

最后前端处理进行下载即可。