设置居中

 CellStyle centerStyle = wb.createCellStyle();centerStyle.setAlignment(HorizontalAlignment.CENTER); // 居中centerStyle.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中

设置背景颜色

 CellStyle colorStyle = wb.createCellStyle();colorStyle.setFillForegroundColor(IndexedColors.YELLOW.getIndex()); //背景颜色colorStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);//设置实心 不然不会有颜色

设置边框

CellStyle borderStyle = wb.createCellStyle();
borderStyle.setBorderBottom(BorderStyle.THIN); //下边框
borderStyle.setBorderLeft(BorderStyle.THIN);//左边框
borderStyle.setBorderTop(BorderStyle.THIN);//上边框
borderStyle.setBorderRight(BorderStyle.THIN);//右边框

设置字体

 Font font = wb.createFont();font.setFontHeightInPoints((short) 10);//字体大小font.setColor(IndexedColors.RED.getIndex());//字体颜色font.setFontName("楷体");//字体CellStyle fontStyle = wb.createCellStyle();fontStyle.setFont(font);

合并单元格

第一行合并到第二行 第一列合并到第四列

 //创建一个合并单元格CellRangeAddress region = new CellRangeAddress(0, 1, 0, 3);sheet.addMergedRegion(region);

实际使用

       public void style(HttpServletResponse response) throws IOException {//创建工作簿Workbook   wb = new XSSFWorkbook();Sheet sheet = wb.createSheet();CellStyle centerStyle = wb.createCellStyle();centerStyle.setAlignment(HorizontalAlignment.CENTER); // 居中centerStyle.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中CellStyle colorStyle = wb.createCellStyle();colorStyle.setFillForegroundColor(IndexedColors.YELLOW.getIndex()); //背景颜色colorStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);//设置实心 不然不会有颜色CellStyle borderStyle = wb.createCellStyle();borderStyle.setBorderBottom(BorderStyle.THIN); //下边框borderStyle.setBorderLeft(BorderStyle.THIN);//左边框borderStyle.setBorderTop(BorderStyle.THIN);//上边框borderStyle.setBorderRight(BorderStyle.THIN);//右边框Font font = wb.createFont();font.setFontHeightInPoints((short) 10);//字体大小font.setColor(IndexedColors.RED.getIndex());//字体颜色font.setFontName("楷体");//字体CellStyle fontStyle = wb.createCellStyle();fontStyle.setFont(font);Row regionRow = sheet.createRow(0);Cell cell = regionRow.createCell(0);cell.setCellValue("合并单元格");cell.setCellStyle(centerStyle);//创建一个合并单元格CellRangeAddress region = new CellRangeAddress(0, 1, 0, 3);sheet.addMergedRegion(region);Row row = sheet.createRow(2);Cell centerCell = row.createCell(0);centerCell.setCellValue("居中");centerCell.setCellStyle(centerStyle);Cell colorCell = row.createCell(1);colorCell.setCellValue("背景颜色");colorCell.setCellStyle(colorStyle);Cell borderCell = row.createCell(2);borderCell.setCellValue("边框");borderCell.setCellStyle(borderStyle);Cell fontCell = row.createCell(3);fontCell.setCellValue("字体");fontCell.setCellStyle(fontStyle);String fileName = "我是文件名";//解决文件名中文乱码response.setHeader("Content-disposition", "attachment;filename=" + new String(fileName.getBytes(), "iso-8859-1")+".xlsx");//导出到浏览器wb.write(response.getOutputStream());}

运行效果