poi导出复杂的excle，简单易懂一看既会

首先，poi老的版本是和新版本是不兼容的，现在poi依赖都到<version>4.1.1</version>了，搜到的博客大部分是前几年的，好多方法基本上都用不了。----》大家注意一下

1.我实现的功能：上图片

月度任务目标，默认有8行。数据少于8行，剩余的行留在哪里。大于8行，for循环递增添加。

(1)大于八行

（2）小于八行

2.前置知识，懂了看代码会舒服很多

1)创建workbook工作薄；

2)创建一个工作表sheet；

3)创建一个行对象row(下标起始值为0)；

4)创建一个单元格对象cell(下标起始值为0)；

5)给单元格设置内容；

6)设置单元格样式，设置字体和字体大小；

3.上代码

（1）我使用的依赖

 <dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>4.1.1</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>4.1.2</version></dependency>

（2）后端代码

 @GetMapping("/export")public ByteArrayOutputStream exportExcle(String userid, Integer bookId, String timeStart, String timeEnd,HttpServletResponse response, Integer isNotMe) throws Exception {response.setCharacterEncoding("UTF-8");//编码格式为UTF-8response.setContentType("application/vnd.ms-excel;charset=UTF-8");List<PerformanceTask> exportTaskList = new ArrayList<>();if (timeStart != null) {//查询的情况exportTaskList = performanceTaskBookService.exportSelectTaskList(timeStart, timeEnd, bookId, userid, isNotMe);} else {//不查询的情况exportTaskList = performanceTaskBookService.exportNoSelectTaskList(userid, bookId, isNotMe);}HSSFWorkbook wb = new HSSFWorkbook();if (exportTaskList.size() > 0) {PerformanceTaskBook performanceTaskBook = performanceTaskBookMapper.selectById(exportTaskList.get(0).getPerformanceTaskBookId());HSSFSheet sheet = wb.createSheet("月绩核表");//sheet.setColumnWidth(0, 10);//  sheet.setDefaultRowHeight();sheet.setDefaultRowHeightInPoints(100);//sheet.setColumnWidth(0, 3766);//表头字体Font headerFont = wb.createFont();headerFont.setFontName("微软雅黑");headerFont.setFontHeightInPoints((short) 18);headerFont.setBold(true);            //字体加粗//正文字体Font contextFont = wb.createFont();contextFont.setFontHeightInPoints((short) 12);//表头样式，左右上下居中CellStyle headerStyle = wb.createCellStyle();headerStyle.setFont(headerFont);headerStyle.setAlignment(HorizontalAlignment.CENTER);// 左右居中headerStyle.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中headerStyle.setLocked(true);headerStyle.setWrapText(false);// 自动换行//单元格样式，左右上下居中 边框========第一行CellStyle commonStyle = wb.createCellStyle();commonStyle.setFont(contextFont);commonStyle.setAlignment(HorizontalAlignment.CENTER);// 左右居中commonStyle.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中// commonStyle.setLocked(true);commonStyle.setWrapText(true);// 自动换行commonStyle.setFillForegroundColor(IndexedColors.CORNFLOWER_BLUE.getIndex());commonStyle.setBorderBottom(BorderStyle.THIN);//下边框commonStyle.setBorderLeft(BorderStyle.THIN);//左边框commonStyle.setBorderTop(BorderStyle.THIN);//上边框commonStyle.setBorderRight(BorderStyle.THIN);//右边框//******单元格第二行start********HSSFCellStyle commonStyle2 = wb.createCellStyle();commonStyle2.setFont(contextFont);commonStyle2.setAlignment(HorizontalAlignment.CENTER);// 左右居中commonStyle2.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中commonStyle2.setFillForegroundColor(IndexedColors.SEA_GREEN.index);//设置背景色commonStyle2.setFillPattern(FillPatternType.SOLID_FOREGROUND);commonStyle2.setLocked(true);commonStyle2.setWrapText(true);// 自动换行commonStyle2.setBorderBottom(BorderStyle.THIN);//下边框commonStyle2.setBorderLeft(BorderStyle.THIN);//左边框commonStyle2.setBorderTop(BorderStyle.THIN);//上边框commonStyle2.setBorderRight(BorderStyle.THIN);//右边框//******单元格第二行end*********//******单元格第三行start*********HSSFCellStyle commonStyle31 = wb.createCellStyle();commonStyle31.setFont(contextFont);commonStyle31.setAlignment(HorizontalAlignment.CENTER);// 左右居中commonStyle31.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中commonStyle31.setLocked(true);commonStyle31.setWrapText(true);// 自动换行commonStyle31.setBorderBottom(BorderStyle.THIN);//下边框commonStyle31.setBorderLeft(BorderStyle.THIN);//左边框commonStyle31.setBorderTop(BorderStyle.THIN);//上边框commonStyle31.setBorderRight(BorderStyle.THIN);//右边框HSSFFont font = wb.createFont();font.setFontName("黑体");font.setFontHeightInPoints((short) 12);//设置字体大小font.setBold(true);font.setColor(Font.COLOR_NORMAL);//字体颜色commonStyle31.setFont(font);//选择需要用到的字体格式//******单元格第三行end*********//******单元格倒数第三行start*******HSSFCellStyle commonStylef3 = wb.createCellStyle();commonStylef3.setFont(contextFont);commonStylef3.setAlignment(HorizontalAlignment.CENTER);// 左右居中commonStylef3.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中commonStylef3.setFillForegroundColor(IndexedColors.PALE_BLUE.index);//设置背景色commonStylef3.setFillPattern(FillPatternType.SOLID_FOREGROUND);HSSFFont font4 = wb.createFont();font4.setFontName("黑体");font4.setFontHeightInPoints((short) 12);//设置字体大小font4.setBold(true);font4.setColor(Font.COLOR_NORMAL);//字体颜色commonStylef3.setFont(font4);//选择需要用到的字体格式commonStylef3.setLocked(true);commonStylef3.setWrapText(true);// 自动换行commonStylef3.setBorderBottom(BorderStyle.THIN);//下边框commonStylef3.setBorderLeft(BorderStyle.THIN);//左边框commonStylef3.setBorderTop(BorderStyle.THIN);//上边框commonStylef3.setBorderRight(BorderStyle.THIN);//右边框//******单元格倒数第三行end*********//******单元格倒数第2行start********HSSFCellStyle commonStylef2 = wb.createCellStyle();commonStylef2.setFont(contextFont);commonStylef2.setAlignment(HorizontalAlignment.CENTER);// 左右居中commonStylef2.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中commonStylef2.setLocked(true);commonStylef2.setWrapText(true);// 自动换行HSSFFont font2 = wb.createFont();font2.setFontName("黑体");font2.setFontHeightInPoints((short) 12);//设置字体大小font2.setBold(true);font2.setColor(Font.COLOR_NORMAL);//字体颜色commonStylef2.setFont(font2);//选择需要用到的字体格式commonStylef2.setBorderBottom(BorderStyle.THIN);//下边框commonStylef2.setBorderLeft(BorderStyle.THIN);//左边框commonStylef2.setBorderTop(BorderStyle.THIN);//上边框commonStylef2.setBorderRight(BorderStyle.THIN);//右边框//******单元格倒数第2行end*********//******加粗字体start*********HSSFCellStyle cu2 = wb.createCellStyle();cu2.setFont(contextFont);cu2.setAlignment(HorizontalAlignment.CENTER);// 左右居中cu2.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中cu2.setLocked(true);cu2.setWrapText(true);// 自动换行HSSFFont font3 = wb.createFont();font3.setFontName("黑体");font3.setFontHeightInPoints((short) 12);//设置字体大小font3.setBold(true);font3.setColor(Font.COLOR_NORMAL);//字体颜色cu2.setFont(font3);//选择需要用到的字体格式cu2.setBorderBottom(BorderStyle.THIN);//下边框cu2.setBorderLeft(BorderStyle.THIN);//左边框cu2.setBorderTop(BorderStyle.THIN);//上边框cu2.setBorderRight(BorderStyle.THIN);//右边框//******加粗字体end*********//单元格样式，竖向 边框CellStyle verticalStyle = wb.createCellStyle();verticalStyle.setFont(contextFont);verticalStyle.setRotation((short) 255);//竖向verticalStyle.setLocked(true);verticalStyle.setWrapText(false);// 自动换行verticalStyle.setBorderBottom(BorderStyle.THIN);//下边框verticalStyle.setBorderLeft(BorderStyle.THIN);//左边框verticalStyle.setBorderTop(BorderStyle.MEDIUM_DASHED);//上边框verticalStyle.setBorderRight(BorderStyle.THIN);//右边框/*******************==========插入图片start=============***********************/FileOutputStream fileOut = null;RenderedImage bufferImg = null;//图片//try {// 先把读进来的图片放到一个ByteArrayOutputStream中，以便产生ByteArrayByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();//将图片读到BufferedImageString destUrl = "https://pr-mdf-erp.oss-cn-hangzhou.aliyuncs.com/logo/excelLogo.png";HttpURLConnection httpUrl = (HttpURLConnection) new URL(destUrl).openConnection();httpUrl.connect();//File file = FileUtil.inputStreamToFile(httpUrl.getInputStream(),"url.png");// System.out.println("111====>>>>"+file.getPath());bufferImg = ImageIO.read(httpUrl.getInputStream());httpUrl.disconnect();// bufferImg = ImageIO.read(outputStream);ImageIO.write(bufferImg, "png", byteArrayOut);// 将图片写入流中// 利用HSSFPatriarch将图片写入EXCELHSSFPatriarch patriarch = sheet.createDrawingPatriarch();//列  行//图片一导出到单元格B5中HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 0, 1, (short) 0, 0, (short) 2, 1);// 插入图片patriarch.createPicture(anchor, wb.addPicture(byteArrayOut.toByteArray(), HSSFWorkbook.PICTURE_TYPE_PNG));/*******************==========插入图片end=============***********************/int rowNum = 0;//设置列宽for (int i = 0; i < 10; i++) {if (i == 0 || i == 1) {sheet.setColumnWidth(i, 3000);} else if (i == 2) {sheet.setColumnWidth(i, 2600);} else if (i == 3) {//绩效任务内容sheet.setColumnWidth(i, 23000);} else if (i == 4) {//计划时间sheet.setColumnWidth(i, 6600);} else if (i == 5) {//完成情况sheet.setColumnWidth(i, 3600);} else if (i == 6) {//自评得分sheet.setColumnWidth(i, 3100);} else if (i == 7) {//实际完成情况简述sheet.setColumnWidth(i, 5600);} else if (i == 8) {//复评得分sheet.setColumnWidth(i, 3100);} else {sheet.setColumnWidth(i, 2000);}}//第一行Row r0 = sheet.createRow(rowNum++);r0.setHeight((short) 800);Cell c00 = r0.createCell(2);c00.setCellValue(performanceTaskBook.getPerformanceTaskBookName() +time.substring(0, 4) + "年" + time.substring(5, 7) + "月绩效考核表");c00.setCellStyle(headerStyle);//合并单元格sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, 1));sheet.addMergedRegion(new CellRangeAddress(0, 0, 2, 9));// 第二行Row r1 = sheet.createRow(rowNum++);r1.setHeight((short) 500);String[] row_first = {"职能中心", "", "", "岗位名称", "", " 6", "7", "", "", "10"};for (int i = 0; i < row_first.length; i++) {Cell tempCell = r1.createCell(i);// sheet.autoSizeColumn(2, true);if (i == 0) {//1tempCell.setCellValue(row_first[i]);tempCell.setCellStyle(commonStyle2);} else if (i == 1) {//23tempCell.setCellStyle(commonStyle2);tempCell.setCellValue(departmentName);} else if (i == 3) {tempCell.setCellValue(row_first[i]);tempCell.setCellStyle(commonStyle2);} else if (i == 4) {//456tempCell.setCellValue((String) kvUser.get("position"));tempCell.setCellStyle(commonStyle2);} else if (i == 6) {//7tempCell.setCellValue("姓名");tempCell.setCellStyle(commonStyle2);} else if (i == 7) {//8 9 10tempCell.setCellValue(performanceTask.getOperator());tempCell.setCellStyle(commonStyle2);}}//合并sheet.addMergedRegion(new CellRangeAddress(1, 1, 1, 2));sheet.addMergedRegion(new CellRangeAddress(1, 1, 4, 5));sheet.addMergedRegion(new CellRangeAddress(1, 1, 7, 9));//第三行Row r2 = sheet.createRow(rowNum++);r2.setHeight((short) 700);String[] row_second = {"区分", "指标类别", "", "绩效任务内容", "计划时间", "完成情况", "自评得分", "实际完成情况简述", "复评得分", "权重"};for (int j = 0; j < row_second.length; j++) {Cell tempCell1 = r2.createCell(j);tempCell1.setCellValue(row_second[j]);tempCell1.setCellStyle(commonStyle31);}// 合并sheet.addMergedRegion(new CellRangeAddress(2, 2, 1, 2));int length = 0;if (exportTaskList.size() > 8) {length = exportTaskList.size() - 8;}//循环每一行int targetNum = 1;for (int i = 0; i < 8 + length; i++) {PerformanceTask p = null;if (i < exportTaskList.size()) {p = exportTaskList.get(i);}Row tempRow = sheet.createRow(rowNum++);tempRow.setHeight((short) 500);// 循环单元格填入数据for (int j = 0; j < 10; j++) {String tempValue = null;Cell tempCell1 = tempRow.createCell(j);tempCell1.setCellStyle(commonStyle);if (j == 0) {if (targetNum == 1) {tempValue = "B工作绩效考核指标（40%）";tempCell1.setCellStyle(cu2);} else {tempValue = null;}}if (j == 1) {if (targetNum == 1) {tempValue = "月度任务指标";tempCell1.setCellStyle(cu2);} else {tempValue = null;}}if (j == 2) {// 目标tempValue = "目标" + targetNum;} else if (j == 3) {if (p != null) {// 任务描述--》绩效任务内容tempValue = p.getTaskDescription();} else {tempValue = null;}} else if (j == 4) {if (p != null) {// 计划时间tempValue = p.getTaskCycleStart() + "~" + p.getTaskCycleEnd();} else {tempValue = null;}} else if (j == 5) {if (p != null) {// 完成情况if (p.getTaskState() == 0) {tempValue = "未读";} else if (p.getTaskState() == 1) {tempValue = "执行中";} else if (p.getTaskState() == 2) {tempValue = "待审核";} else if (p.getTaskState() == 3) {if (p.getCompletedTime() != null) {//仅仅为了过滤掉历史不正确数据。正式使用的时候p.getCompletedTime()不会为空的SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");Date sd1 = df.parse(p.getTaskCycleEnd());//要求完成时间Date sd2 = df.parse(p.getCompletedTime());//最后完成时间if (sd2.before(sd1)) {tempValue = "已完成";} else {tempValue = "逾期完成时间" + p.getCompletedTime();}} else {tempValue = "已完成";}}} else {tempValue = null;}} else if (j == 6) {// 自我评分tempValue = null;} else if (j == 7) {// 实际完成情况简述tempValue = null;} else if (j == 8) {// 复核评分tempValue = null;} else if (j == 9) {// 权重tempValue = null;}tempCell1.setCellValue(tempValue);}targetNum++;}int size = 8 + length;// 合并sheet.addMergedRegion(new CellRangeAddress(3, size + 3, 0, 0));sheet.addMergedRegion(new CellRangeAddress(3, size + 2, 1, 1));//倒数第七行Row rf7 = sheet.createRow(rowNum++);rf7.setHeight((short) 700);String[] row_rf7 = {"", "考评小计(依据年度经营计划及组织发展营运管理需求制定)", "", "", "", "", "", "", "", ""};for (int j = 0; j < 10; j++) {Cell tempCellf7 = rf7.createCell(j);if (j == 1) {tempCellf7.setCellValue(row_rf7[j]);tempCellf7.setCellStyle(cu2);} else {tempCellf7.setCellValue(row_rf7[j]);tempCellf7.setCellStyle(commonStyle);}}sheet.addMergedRegion(new CellRangeAddress(size + 3,size + 3, 1, 3));//循环每一行int target = 1;for (int i = 0; i < 2; i++) {Row tempRow = sheet.createRow(rowNum++);tempRow.setHeight((short) 500);// 循环单元格填入数据for (int j = 0; j < 10; j++) {String tempValue = null;Cell tempCell6 = tempRow.createCell(j);tempCell6.setCellStyle(commonStyle);if (j == 0) {if (target == 1) {tempValue = "C主管裁量（加减分项）";tempCell6.setCellStyle(cu2);} else {tempValue = null;}} else if (j == 1) {// 目标tempValue = "目标" + "(" + target + ")";} else {tempValue = null;}tempCell6.setCellValue(tempValue);}target++;}//倒数第4行Row rf4 = sheet.createRow(rowNum++);rf4.setHeight((short) 700);// String[] row_rf4 = {"", "考评小计（此项由直属主管在员工绩效评核时综合评定，分值+-5分，评核时必须备注客观评核理由）", "3", "4", "5", "6", "7", "8", "9", "10"};for (int j = 0; j < 10; j++) {String tempValue = null;Cell tempCellrf4 = rf4.createCell(j);if (j == 1) {tempCellrf4.setCellValue("考评小计（此项由直属主管在员工绩效评核时综合评定，分值+-5分，评核时必须备注客观评核理由）");tempCellrf4.setCellStyle(cu2);} else {tempCellrf4.setCellValue(tempValue);tempCellrf4.setCellStyle(commonStyle);}//tempCell.setCellStyle(commonWrapStyle);}// 合并sheet.addMergedRegion(new CellRangeAddress(size + 4, size + 6,0, 0));sheet.addMergedRegion(new CellRangeAddress(size + 4, size + 4, 1, 2));sheet.addMergedRegion(new CellRangeAddress(size + 5, size + 5, 1, 2));sheet.addMergedRegion(new CellRangeAddress(size + 6, size + 6, 1, 3));//倒数第3行Row rf3 = sheet.createRow(rowNum++);rf3.setHeight((short) 700);String[] row_rf3 = {"岗位绩效考评总分=B+C=", "2", "3", "4", "5", "6", "7", "8", "9", "10"};for (int j = 0; j < 10; j++) {String tempValue = null;Cell tempCellrf3 = rf3.createCell(j);tempCellrf3.setCellStyle(commonStylef3);if (j == 0) {tempCellrf3.setCellValue(row_rf3[j]);tempCellrf3.setCellStyle(commonStylef3);} else {tempCellrf3.setCellValue(tempValue);}}// 合并sheet.addMergedRegion(new CellRangeAddress(size + 7, size + 7,0, 3));//倒数第2行Row rf2 = sheet.createRow(rowNum++);rf2.setHeight((short) 700);String[] row_rf2 = {"被评核人签字/日期", "人资行政中心负责人签字/日期", "总办运营签字/日期", "审批人签字/日期", "5", "6", "7", "8", "9", "10"};for (int j = 0; j < 10; j++) {String tempValue = null;Cell tempCellrf2 = rf2.createCell(j);if (j == 0) {tempCellrf2.setCellValue("被评核人签字/日期");} else if (j == 3) {tempCellrf2.setCellValue("人资行政中心负责人签字/日期");} else if (j == 4) {tempCellrf2.setCellValue("总办运营签字/日期");} else if (j == 7) {tempCellrf2.setCellValue("审批人签字/日期");} else {tempCellrf2.setCellValue(tempValue);}tempCellrf2.setCellStyle(commonStylef2);}// 合并sheet.addMergedRegion(new CellRangeAddress(size + 8, size + 8,0, 2));
//            sheet.addMergedRegion(new CellRangeAddress(exportTaskList.size() + 8, exportTaskList.size() + 8,
//                    3, 4));sheet.addMergedRegion(new CellRangeAddress(size + 8, size + 8,4, 6));sheet.addMergedRegion(new CellRangeAddress(size + 8, size + 8,7, 9));//倒数第1行Row rf1 = sheet.createRow(rowNum++);rf1.setHeight((short) 700);for (int j = 0; j < 10; j++) {String tempValue = null;Cell tempCellrf1 = rf1.createCell(j);tempCellrf1.setCellValue(tempValue);tempCellrf1.setCellStyle(commonStyle);}sheet.addMergedRegion(new CellRangeAddress(size + 9, size + 9,0, 2));sheet.addMergedRegion(new CellRangeAddress(size + 9, size + 9,3, 6));sheet.addMergedRegion(new CellRangeAddress(size + 9, size + 9,7, 9));}OutputStream outputStream = response.getOutputStream();wb.write(outputStream);return null;}

（3）设置HttpServletResponse的作用

-->response对象的功能分为四种：

设置响应头信息：addHeader("reFresh", "5;URL=xxx")

发送状态码：sendError(404)

设置响应正文：getWriter().print("xxx")

重定向：sendRedirect("path")
-->response.setContentType("text/html;charset=utf-8"):设置响应类型为html,编码为utf-8,处理相应页面文本显示的乱码

response.setCharacterEncoding("utf-8"):如果响应类型为文本，那么就需要设置文本的编码类型，然后浏览器使用这个编码来解读文本，注意：如果没有设置contentType，那么浏览器会认为contentType为text/html,如果没设置编码，那么默认为IOS-8859-1编码，所以以上两点在使用response返回结果之前必须设置。
参考博客：https://blog.csdn.net/weixin_41547486/article/details/81266712?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-4.control&dist_request_id=&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-4.control

（4）引入logo，坐标

HSSFClientAnchor(int dx1, int dy1, int dx2, int dy2, short col1, int row1, short col2, int row2)
dx1 dy1 起始单元格中的x,y坐标.

dx2 dy2 结束单元格中的x,y坐标

col1,row1 指定起始的单元格，下标从0开始

col2,row2 指定结束的单元格，下标从0开始

4.总结：

excle设置样式，其实是以单元格为单位的。时间仓促，最近超忙，代码有冗余（实属抱歉）。总结以上内容，欢迎大家一起讨论。。。。