POI合并单元格

public class POICellMergeDemo {

public static void main(String[] args) throws Exception {

HSSFWorkbook wb = new HSSFWorkbook();// 创建一个Excel文件

HSSFSheet sheet = wb.createSheet("银行存余额表(1)");// 创建一个Excel的Sheet

// 定义样式

HSSFCellStyle cellStyleCenter = ExportFileNameUtils.initColumnHeadStyle(wb);//表头样工

HSSFCellStyle cellStyleRight = ExportFileNameUtils.initColumnCenterstyle(wb);//单元格样式

HSSFCellStyle cellStyleLeft = ExportFileNameUtils.initColumnCenterstyle(wb);

cellStyleRight.setAlignment(HSSFCellStyle.ALIGN_RIGHT);//右对齐

cellStyleLeft.setAlignment(HSSFCellStyle.ALIGN_LEFT);//左对齐

// 设置列宽

sheet.setColumnWidth(0, 7200);

sheet.setColumnWidth(1, 5000);

sheet.setColumnWidth(2, 5000);

sheet.setColumnWidth(3, 5000);

sheet.setColumnWidth(4, 5000);

sheet.setColumnWidth(5, 5000);

try {

HSSFRow row = null;

HSSFCell cell = null;

// ---------------------------1.初始化带边框的表头------------------------------

for (int i = 0; i < 5; i++) {

row = sheet.createRow(i);

for (int j = 0; j <= 5; j++) {

cell = row.createCell(j);

cell.setCellStyle(cellStyleCenter);

}

}

// ---------------------------2.指定单元格填充数据------------------------------

cell = sheet.getRow(0).getCell(0);

cell.setCellValue(new HSSFRichTextString("银行存余额表"));

cell = sheet.getRow(1).getCell(0);

cell.setCellValue(new HSSFRichTextString("2015-08-05"));

cell = sheet.getRow(2).getCell(0);

cell.setCellValue(new HSSFRichTextString("开户行"));

cell = sheet.getRow(2).getCell(1);

cell.setCellValue(new HSSFRichTextString("活期"));

cell = sheet.getRow(2).getCell(3);

cell.setCellValue(new HSSFRichTextString("定期"));

cell = sheet.getRow(2).getCell(5);

cell.setCellValue(new HSSFRichTextString("存款合计"));

cell = sheet.getRow(3).getCell(1);

cell.setCellValue(new HSSFRichTextString(" "));

cell = sheet.getRow(3).getCell(4);

cell.setCellValue(new HSSFRichTextString("折合本位币合计"));

cell = sheet.getRow(4).getCell(1);

cell.setCellValue(new HSSFRichTextString("人民币"));

cell = sheet.getRow(4).getCell(2);

cell.setCellValue(new HSSFRichTextString("折合本位币合计"));

// ---------------------------3.合并单元格------------------------------

sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, 5));// 开始行，结束行，开始列，结束列

sheet.addMergedRegion(new CellRangeAddress(1, 1, 0, 5));

sheet.addMergedRegion(new CellRangeAddress(2, 4, 0, 0));

sheet.addMergedRegion(new CellRangeAddress(2, 3, 1, 2));

sheet.addMergedRegion(new CellRangeAddress(2, 2, 3, 4));

sheet.addMergedRegion(new CellRangeAddress(3, 4, 4, 4));

sheet.addMergedRegion(new CellRangeAddress(2, 4, 5, 5));

FileOutputStream fileOut = new FileOutputStream("d:\\银行存款余额表.xls");

wb.write(fileOut);

fileOut.close();

} catch (Exception e) {

e.printStackTrace();

}

}

}

@SuppressWarnings("serial")

public class ExportFileNameUtils implements Serializable {

/**

*

* <br>

* <b>功能：</b>设置下载文件中文件的名称<br>

* <b>作者：</b>yixq<br>

* <b>@param filename

* <b>@param request

* <b>@return</b>

*/

public static String encodeFilename(String filename,

HttpServletRequest request) {

/**

* 获取客户端浏览器和操作系统信息 在IE浏览器中得到的是：User-Agent=Mozilla/4.0 (compatible; MSIE

* 6.0; Windows NT 5.1; SV1; Maxthon; Alexa Toolbar)

* 在Firefox中得到的是：User-Agent=Mozilla/5.0 (Windows; U; Windows NT 5.1;

* zh-CN; rv:1.7.10) Gecko/20050717 Firefox/1.0.6

*/

String agent = request.getHeader("USER-AGENT");

try {

if ((agent != null) && (-1 != agent.indexOf("MSIE"))) {

String newFileName = URLEncoder.encode(filename, "UTF-8");

newFileName = StringUtils.replace(newFileName, "+", "%20");

if (newFileName.length() > 150) {

newFileName = new String(filename.getBytes("GB2312"),

"ISO8859-1");

newFileName = StringUtils.replace(newFileName, " ", "%20");

}

return newFileName;

}

if ((agent != null) && (-1 != agent.indexOf("Mozilla")))

return MimeUtility.encodeText(filename, "UTF-8", "B");

return filename;

} catch (Exception ex) {

return filename;

}

}

/**

*

* <br>

* <b>功能：</b>列头样式<br>

* <b>作者：</b>yixq<br>

* <b>@param wb

* <b>@return</b>

*/

public static HSSFCellStyle initColumnHeadStyle(HSSFWorkbook wb) {

HSSFCellStyle columnHeadStyle = wb.createCellStyle();

HSSFFont columnHeadFont = wb.createFont();

columnHeadFont.setFontName("宋体");

columnHeadFont.setFontHeightInPoints((short) 10);

columnHeadFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);

columnHeadStyle.setFont(columnHeadFont);

columnHeadStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 左右居中

columnHeadStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 上下居中

columnHeadStyle.setLocked(true);

columnHeadStyle.setWrapText(true);

columnHeadStyle.setLeftBorderColor(HSSFColor.BLACK.index);// 左边框的颜色

columnHeadStyle.setBorderLeft((short) 1);// 边框的大小

columnHeadStyle.setRightBorderColor(HSSFColor.BLACK.index);// 右边框的颜色

columnHeadStyle.setBorderRight((short) 1);// 边框的大小

columnHeadStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); // 设置单元格的边框为粗体

columnHeadStyle.setBottomBorderColor(HSSFColor.BLACK.index); // 设置单元格的边框颜色

// 设置单元格的背景颜色（单元格的样式会覆盖列或行的样式）

columnHeadStyle.setFillForegroundColor(HSSFColor.WHITE.index);

return columnHeadStyle;

}

/**

*

* <br>

* <b>功能：</b>单元格的默认样式<br>

* <b>作者：</b>yixq<br>

* <b>@param wb

* <b>@return</b>

*/

public static HSSFCellStyle initColumnCenterstyle(HSSFWorkbook wb) {

HSSFFont font = wb.createFont();

font.setFontName("宋体");

font.setFontHeightInPoints((short) 10);

HSSFCellStyle centerstyle = wb.createCellStyle();

centerstyle.setFont(font);

centerstyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 左右居中

centerstyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 上下居中

centerstyle.setWrapText(true);

centerstyle.setLeftBorderColor(HSSFColor.BLACK.index);

centerstyle.setBorderLeft((short) 1);

centerstyle.setRightBorderColor(HSSFColor.BLACK.index);

centerstyle.setBorderRight((short) 1);

centerstyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); // 设置单元格的边框为粗体

centerstyle.setBottomBorderColor(HSSFColor.BLACK.index); // 设置单元格的边框颜色．

centerstyle.setFillForegroundColor(HSSFColor.WHITE.index);// 设置单元格的背景颜色．

return centerstyle;

}

}

上述代码思路:

先循环创建表头所有的单元格列，并设置边框样式，再根据行号，列号设置特定单元的值，最后才是合并。

合并带边框的效果图：