Java poi简单操作

XSSFWorkbook workbook = new XSSFWorkbook();
XSSFSheet sheet = workbook.createSheet(title);                    //创建一个表

	// 生成一个样式
			XSSFCellStyle style = workbook.createCellStyle();
			// 设置这些样式
			style.setFillForegroundColor(new XSSFColor(java.awt.Color.lightGray));
			style.setAlignment(XSSFCellStyle.ALIGN_CENTER);//对其方式
			style.setVerticalAlignment(XSSFCellStyle.VERTICAL_CENTER);
			style.setWrapText(true);  //是否自动换行
			XSSFFont font = workbook.createFont();
			font.setFontHeightInPoints((short) 14);//字体大小
			font.setBoldweight(XSSFFont.BOLDWEIGHT_BOLD);
			style.setFont(font);
			//标题行
			XSSFRow row0 = sheet.createRow(0);
			row0.setHeightInPoints(25);
			sheet.addMergedRegion(new CellRangeAddress(0, 0 , 0, 20));
			Cell cell0 = row0.createCell(0);
			cell0.setCellStyle(style);
			cell0.setCellValue(title);