创建一个工作簿
创建一个sheet
创建一个Row对象
创建一个cell对象(1个row+1个cell构成一个单元格)
设置单元格内容
设置单元格样式. 字体 字体大小 是否加粗
保存
关闭流对象
2010以上格式使用XSSFWorkBook对象, 2003格式使用HSSFWorkBook对象, 其他对象操作基本一样.
public void test1() { HSSFWorkbook workbook = new HSSFWorkbook(); CellStyle cellStyle = workbook.createCellStyle(); cellStyle.setBorderBottom(BorderStyle.THIN); cellStyle.setBorderLeft(BorderStyle.THIN); cellStyle.setBorderRight(BorderStyle.THIN); cellStyle.setBorderTop(BorderStyle.THIN); Font font = workbook.createFont(); font.setFontName("宋体"); font.setFontHeightInPoints((short) 12); cellStyle.setFont(font); HSSFSheet sheet = workbook.createSheet("Sheet1"); //设置单元格宽度 sheet.setColumnWidth(0, 30 * 256); sheet.setColumnWidth(1, 30 * 256); sheet.setColumnWidth(2, 30 * 256); Row row0 = sheet.createRow(0); Cell cell0 = row0.createCell(0); cell0.setCellValue("序号"); cell0.setCellStyle(cellStyle); Cell cell1 = row0.createCell(1); cell1.setCellValue("姓名"); Cell cell2 = row0.createCell(2); cell2.setCellValue("成绩"); OutputStream os = null; try { os = new FileOutputStream("d:\\测试生成2003.xls"); workbook.write(os); os.close(); } catch (Exception e) { e.printStackTrace(); } }
@Test public void test2() { XSSFWorkbook workbook = new XSSFWorkbook(); CellStyle cellStyle = workbook.createCellStyle(); cellStyle.setBorderBottom(BorderStyle.THIN); cellStyle.setBorderLeft(BorderStyle.THIN); cellStyle.setBorderRight(BorderStyle.THIN); cellStyle.setBorderTop(BorderStyle.THIN); Font font = workbook.createFont(); font.setFontName("宋体"); font.setFontHeightInPoints((short) 12); cellStyle.setFont(font); XSSFSheet sheet = workbook.createSheet("Sheet1"); Row row0 = sheet.createRow(0); Cell cell0 = row0.createCell(0); cell0.setCellValue("序号"); cell0.setCellStyle(cellStyle); Cell cell1 = row0.createCell(1); cell1.setCellValue("姓名"); Cell cell2 = row0.createCell(2); cell2.setCellValue("成绩"); OutputStream os = null; try { os = new FileOutputStream("d:\\测试生成2010.xlsx"); workbook.write(os); os.close(); } catch (Exception e) { e.printStackTrace(); } }
合并单元格在生成excel中算常见的一个场景, 通常先合并单元, 单元格内容居中,并设置单元格边框.
poi合并单元格使用CellRangeAddress类, 构造函数包括4个参数firstRow, lastRow, firstCol, lastCol根据自己需要传入行和列.
public CellRangeAddress(int firstRow, int lastRow, int firstCol, int lastCol) { }
合并单元格后设置边框poi已提供了RegionUtil静态类, 可直接使用.
CellRangeAddress region = new CellRangeAddress(0, 0, 0, 2); sheet.addMergedRegion(region); RegionUtil.setBorderBottom(BorderStyle.THIN, region, sheet); RegionUtil.setBorderLeft(BorderStyle.THIN, region, sheet); RegionUtil.setBorderTop(BorderStyle.THIN, region, sheet); RegionUtil.setBorderRight(BorderStyle.THIN, region, sheet);
左右居中 上下居中 自动换行
cellStyle.setAlignment(HorizontalAlignment.CENTER); cellStyle.setVerticalAlignment(VerticalAlignment.CENTER); cellStyle.setWrapText(true);
使用SpringMVC/SpringBoot导出excel
@Controller @GetMapping("/excel2003") public void excel2003(HttpServletResponse httpServletResponse){ try { //2010格式设置 //response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"); //2003格式设置 response.setContentType("application/vnd.ms-excel"); httpServletResponse.addHeader("Content-Disposition", "attachment;fileName=" + URLEncoder.encode("学生成绩单.xls", "utf-8")); ServletOutputStream outputStream = httpServletResponse.getOutputStream(); HSSFWorkbook workbook = new HSSFWorkbook(); CellStyle cellStyle = workbook.createCellStyle(); cellStyle.setBorderBottom(BorderStyle.THIN); cellStyle.setBorderLeft(BorderStyle.THIN); cellStyle.setBorderRight(BorderStyle.THIN); cellStyle.setBorderTop(BorderStyle.THIN); Font font = workbook.createFont(); font.setFontName("宋体"); font.setFontHeightInPoints((short) 12); cellStyle.setFont(font); HSSFSheet sheet = workbook.createSheet("Sheet1"); Row row0 = sheet.createRow(0); Cell cell0 = row0.createCell(0); cell0.setCellValue("序号"); cell0.setCellStyle(cellStyle); Cell cell1 = row0.createCell(1); cell1.setCellValue("姓名"); Cell cell2 = row0.createCell(2); cell2.setCellValue("成绩"); workbook.write(outputStream); } catch (Exception e) { e.printStackTrace(); } }
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