比较常用的实现Java导入、导出Excel的技术有两种Jakarta POI和Java Excel。
Jakarta POI 是一套用于访问微软格式文档的Java API。Jakarta POI有很多组件组成,其中有用于
操作Excel格式文件的HSSF和
用于操作Word的HWPF;
一、前端使用get请求和post请求都可以
get请求:
window.location.href= appPath+"/export/handoverForm?ticketId="+self.ticketId +"&complainId="+row.id+"&formCode="+self.exportFormCode.complainDetail;
隐藏form表单改写成post请求,form表单get和post都可以:
<form id="exportForm" action="/service/xfComplain/exportCaseLedger" method="post"><input type="hidden" name="dataRange" id="dataRange"/><input type="hidden" name="processStatus" id="processStatus"/> <input type="hidden" name="cantonCode" id="cantonCode"/><input type="hidden" name="startDate" id="startDate"/><input type="hidden" name="endDate" id="endDate"/><input type="hidden" name="multiFildMatch" id="multiFildMatch"/></form>
$("#dataRange").val(self.table.pageData.dataRange);$("#processStatus").val(self.table.pageData.processStatus);$("#startDate").val(self.table.pageData.startDate);$("#endDate").val(self.table.pageData.endDate);$("#multiFildMatch").val(self.table.pageData.multiFildMatch);$('#exportForm').submit();
二、java代码
@ResponseBody@RequestMapping("/exportWord")public void exportHandoverForm(HttpServletRequest request,HttpServletResponse response, ExportParam exportParam) {String projectPath = getProjectPath(request);String templateFile = getTemplateFile(exportParam, projectPath, request);Map<String, Object> data = new HashMap<>();File file = null;InputStream in = null;ServletOutputStream out = null;try {// 数据源HandoverModel handoverModel = getHandoverFormData(exportParam.getComplainId());// 反射机制,获取所有属性对象,在拿到属性值,设置数据for (Field field : HandoverModel.class.getDeclaredFields()) {// 暴力反射,不是public修饰的属性也要获取field.setAccessible(true);data.put(field.getName(), field.get(handoverModel));}// 数据源组成map键值对形式data.put("reportorList", handoverModel.getReportorList().getDatas());String fileName = handoverModel.getCaseCode();String exportFilePath = projectPath + ExportConstant.DEFAULT_EXPORT_PATH;logger.info("----------templateFile:" + templateFile);logger.info("-----------projectPath:" + projectPath);// Configure对象是处理表格数据,可以自适应生成对应行数数据Configure config = Configure.newBuilder().customPolicy("reportorList", new FileTablePolicy()).build();// XWPFTemplate对象是处理word文档对象,根据map数据源的键值对渲染文档数据XWPFTemplate template = XWPFTemplate.compile(templateFile, config).render(data);// 文件生成到本地,先生成好文档,再读取到内存中响应给前台String downloadFileName = fileName + ".docx";File outPutFile = new File(exportFilePath);if (!outPutFile.exists()) {outPutFile.mkdirs();}FileOutputStream outFile = new FileOutputStream(exportFilePath + downloadFileName);template.write(outFile);outFile.flush();outFile.close();template.close();// 通过文件流读取到文件,再将文件通过response的输出流,返回给页面下载file = new File(projectPath + ExportConstant.DEFAULT_EXPORT_PATH + downloadFileName);in = new FileInputStream(file);response.setCharacterEncoding("utf-8");response.setContentType("application/msword");response.setHeader("Content-Disposition", "attachment;filename=".concat(String.valueOf(URLEncoder.encode(downloadFileName, "UTF-8"))));out = response.getOutputStream();byte[] buffer = new byte[512];int bytesToRead = -1;// 用响应对象response中的输出流读取生成好的文件while ((bytesToRead = in.read(buffer)) != -1) {out.write(buffer, 0, bytesToRead);}} catch (Exception e) {logger.error("导出word出错", e);} finally {if (in != null) try {in.close();if (out != null) out.close();if (file != null) file.delete(); // 删除临时文件} catch (IOException e) {logger.error("删除删除临时文件出错", e);}}}
使用XWPFTemplate引擎,插件化Configure插入表格;
三、不需要插入表格:
XWPFTemplate template = XWPFTemplate.compile(templateFile).render(data);