1.引入依赖

        <dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>5.2.5</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>5.2.5</version></dependency><!--&lt;!&ndash; Poi-tl Word 模板引擎&ndash;&gt;--><dependency><groupId>com.deepoove</groupId><artifactId>poi-tl</artifactId><version>1.12.2</version></dependency>

2.示例代码

//动态表格策略类
public class ItemTablePolicy extends DynamicTableRenderPolicy {@Overridepublic void render(XWPFTable table, Object data) throws Exception {if(data == null){return;
}    Item item = JSON.parseObject(JSON.toJSONString(data),new TypeReference<>(){});
List<Subject> subjects = item.getSubject();int startRow = 1;for(Subject subject : subjects ){XWPFTableRos insertNewTableRow = table.insertNewTableRow(startRow);for(int j = 0; j < 5; j++) insertNewTableRow.createCell();TableRenderPolicy.Helper.renderRow(table.getRow(startRow),Rows.of(Texts.of(subject.getSubjectId()).create(),Texts.of(subject.getName()).create(),Texts.of(subject.getSource()).create(),Texts.of(subject.getTeacherId()).create(),Texts.of(subject.getTeacherName()).create()).create());startRow++;}
}
}public void download(String id,HttpServletResponse) throws Exception{Item item = itemService.getItemById(id);if(null == item){throw new RuntimeException("该报告不存在！");
}Map<String, Object> data = getDocData(item);Configure configure = Configure.builder().bind("table",new ItemTablePolicy()).build();
File docxFile = new File(String.format("%s%s%s",Server.HOME_PATH, File.separator, "ItemReport.docx"));//输出流生成导出的文件
String fileName = String.format("%s_%s_年度报告.docx",record.getName(),DateUtil.today());File file = new File(fileName);try{if(!docxFile.exists()){Resource resource = new ClassPathResource("/template/item.docx");org.apache.commons.io.FileUtils.copyToFile(resource.getInputStream(),file);}XWPFTemplate.compile(docxFile.exists() ? docxFile : file, configure).render(data).writeToFile(file.getAbsolutePath());//把文件写到response的输出流中 最后再删除两个中间文件
response.reset();
response.setContentType("application/vnd.openxmlformats-officedocument.wordprocessingml.document; charset=utf-8");response.setHeader("Content-Length",String.valueOf(file.length()));
response.setHeader("Content-Disposition", String.format("attachment; filename=%s",URLEncoder.encode(fileName, StandardCharsets.UTF_8.displayName())));exportFile(response, new FileInputStream(file));}finally{file.delete();
}}public Map<String, Object> getDocData(Item record){Map<String,Object> data = new HashMap<>();data.put("title",Texts.of(String.format("%s年度报告",record.getName())).create());data.put("studentName",Texts.of(item.getName()).create());data.put("startTime",Texts.of(DateUtil.format(DateUtil.date(record.getStartTime()),"yyyy-MM-dd HH:mm:ss")).create());data.put("endTime",Texts.of(DateUtil.format(DateUtil.date(record.getEndTime()),"yyyy-MM-dd HH:mm:ss")).create());data.pue("totalNumber",Texts.of(record.getTotalNumber()).create());ChartSingleSeriesRenderData pie = Charts.ofSingleSeries("及格情况",new String[]{"及格数量","不及格数量"}).series("countries",new Integer[]{ record.getTotal() - record.getAbnormal(), record.getAbnormal()}).create();data.put("pieChart",pie);return data;}public static void exportFile(HttpServletResponse response, InputStream is){byte[] buff = new byte[1024];BufferedInputStream bis = null;OutputStream os = null;
try{
os = response.getOutputStream();
bis = new BufferedInputStream(is);
int i = bis.read(buff);
while(i!=-1){os.write(buff, 0, buff.length);os.flush();i = bis.read(buff);}}catch (IOException e){e.printStackTrace();
}finally {if(null != bis){try{bis.close();}catch (IOException e){e.printStackTrace();
}}if( os != null){try{os.close();}catch (IOException e ){e.printStackTrace();
}}}}