java POI 操作EXCEL小例子！自己整理了一下，里面属性，功能挺全的！

HSSFWorkbook wb = new HSSFWorkbook();
 
HSSFSheet sheet = wb.createSheet();
 
HSSFCellStyle setBorder = wb.createCellStyle();
HSSFWorkbook wb = new HSSFWorkbook();

HSSFSheet sheet = wb.createSheet();

HSSFCellStyle setBorder = wb.createCellStyle();

一、设置背景色： 

setBorder.setFillForegroundColor((short) 13);// 设置背景色
setBorder.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);

二、设置边框: 

setBorder.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下边框
setBorder.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左边框
setBorder.setBorderTop(HSSFCellStyle.BORDER_THIN);//上边框
setBorder.setBorderRight(HSSFCellStyle.BORDER_THIN);//右边框

三、设置居中: 

setBorder.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 居中

四、设置字体: 

HSSFF font = wb.createFont();
font.setFontName("黑体");
font.setFontHeightInPoints((short) 16);//设置字体大小
 
HSSFFont font2 = wb.createFont();
font2.setFontName("仿宋_GB2312");
font2.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//粗体显示
font2.setFontHeightInPoints((short) 12);

setBorder.setFont(font);//选择需要用到的字体格式

五、设置列宽: 

sheet.setColumnWidth(0, 3766); //第一个参数代表列id(从0开始),第2个参数代表宽度值

六、设置自动换行: 
setBorder.setWrapText(true);//设置自动换行

七、合并单元格: 

//参数1：行号 参数2：起始列号 参数3：行号 参数4：终止列号

Region region1 = new Region(0, (short) 0, 0, (short) 6);

sheet.addMergedRegion(region1);

附一个例子：

package cn.com.util;
 
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.util.CellRangeAddress;
import org.apache.poi.hssf.util.Region;
import org.apache.poi.ss.usermodel.CellStyle;

mport java.io.FileOutputStream;
 
import javax.servlet.http.HttpServlet;
 
public class CreateXL extends HttpServlet {
/** Excel 文件要存放的位置，假定在D盘下 */
public static String outputFile = "c:\\test.xls";
 
private void cteateCell(HSSFWorkbook wb, HSSFRow row, short col, String val) {
HSSFCell cell = row.createCell(col);
// cell.setEncoding(HSSFCell.ENCODING_UTF_16);
cell.setCellValue(val);
HSSFCellStyle cellstyle = wb.createCellStyle();
cellstyle.setAlignment(HSSFCellStyle.ALIGN_CENTER_SELECTION);
cell.setCellStyle(cellstyle);
}
 
public static void main(String argv[]) {
try {
// 创建新的Excel 工作簿
HSSFWorkbook workbook = new HSSFWorkbook();
 
// 设置字体
HSSFFont font = workbook.createFont();
// font.setColor(HSSFFont.COLOR_RED);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
font.setFontHeightInPoints((short) 14);
 
// HSSFFont font2 = workbook.createFont();
// font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// font.setFontHeightInPoints((short)14);
 
// 设置样式
HSSFCellStyle cellStyle = workbook.createCellStyle();
cellStyle.setFont(font);
cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
 
// HSSFCellStyle cellStyle2= workbook.createCellStyle();
// cellStyle.setFont(font2);
// cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
 
// 在Excel工作簿中建一工作表，其名为缺省值
// 如要新建一名为"月报表"的工作表，其语句为：
HSSFSheet sheet = workbook.createSheet("月报表");
CellRangeAddress cellRangeAddress = new CellRangeAddress(0, 0, 0,
11);
sheet.addMergedRegion(cellRangeAddress);
 
//第一行
// 在索引0的位置创建行（最顶端的行）
HSSFRow row = sheet.createRow(0);
// 在索引0的位置创建单元格（左上端）
HSSFCell cell = row.createCell(0);
// 定义单元格为字符串类型
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
cell.setCellStyle(cellStyle);
// 在单元格中输入一些内容
cell.setCellValue(new HSSFRichTextString("北京亿卡联科技发展有限公司小区门禁维修月报表"));
 
//第二行
cellRangeAddress = new CellRangeAddress(1, 1, 3, 6);
sheet.addMergedRegion(cellRangeAddress);
row = sheet.createRow(1);
HSSFCell datecell = row.createCell(3);
datecell.setCellType(HSSFCell.CELL_TYPE_STRING);
datecell.setCellStyle(cellStyle);
datecell.setCellValue("时间间隔xxxxx");
 
cellRangeAddress = new CellRangeAddress(1, 1, 9,
10);
sheet.addMergedRegion(cellRangeAddress);
row.createCell(9).setCellValue("单位：元");
 
//第三行
row=sheet.createRow(2);
row.createCell(0).setCellValue("一、");
row.createCell(1).setCellValue("基本资料");
 
//第4行
row=sheet.createRow(3);
row.createCell(1).setCellValue("小区名称：");
cellRangeAddress=new CellRangeAddress(3,3,2,11);
sheet.addMergedRegion(cellRangeAddress);
row.createCell(2).setCellValue("xxxxx");
 
//第5行
row=sheet.createRow(4);
row.createCell(1).setCellValue("座落地点：");
cellRangeAddress=new CellRangeAddress(4,4,2,11);
sheet.addMergedRegion(cellRangeAddress);
row.createCell(2).setCellValue("xxxxx");
 
//第6行
row=sheet.createRow(5);
row.createCell(1).setCellValue("建成年月：");
cellRangeAddress=new CellRangeAddress(5,5,2,4);
sheet.addMergedRegion(cellRangeAddress);
row.createCell(2).setCellValue("年月日：xxxxx");
row.createCell(5).setCellValue("联系人");
cellRangeAddress=new CellRangeAddress(5,5,6,8);
sheet.addMergedRegion(cellRangeAddress);
row.createCell(6).setCellValue("XXX");

row.createCell(9).setCellValue("电话");
cellRangeAddress=new CellRangeAddress(5,5,10,11);
sheet.addMergedRegion(cellRangeAddress);
row.createCell(10).setCellValue("XXX");
 
//第7行
row=sheet.createRow(6);
row.createCell(1).setCellValue("住户：");
row.createCell(2).setCellValue("(XX)");
row.createCell(3).setCellValue("(户)");
cellRangeAddress=new CellRangeAddress(6,6,4,5);
sheet.addMergedRegion(cellRangeAddress);
row.createCell(4).setCellValue("共计（ ）");
row.createCell(6).setCellValue("幢");
cellRangeAddress=new CellRangeAddress(6,6,7,8);
sheet.addMergedRegion(cellRangeAddress);
row.createCell(7).setCellValue("发卡张数");
cellRangeAddress=new CellRangeAddress(6,6,9,10);
sheet.addMergedRegion(cellRangeAddress);
row.createCell(9).setCellValue("xxxx");
 
 
//第9行
row=sheet.createRow(8);
row.createCell(0).setCellValue("二、");
cellRangeAddress=new CellRangeAddress(8,8,1,2);
sheet.addMergedRegion(cellRangeAddress);
row.createCell(1).setCellValue("维修用材料台账");
row.createCell(6).setCellValue("三、");
cellRangeAddress=new CellRangeAddress(8,8,7,9);
sheet.addMergedRegion(cellRangeAddress);
row.createCell(7).setCellValue("维修工时记录");
//第10行
row=sheet.createRow(9);
row.createCell(0).setCellValue("日期");
row.createCell(1).setCellValue("维修事项");
row.createCell(2).setCellValue("材料清单");
row.createCell(3).setCellValue("数量");
row.createCell(4).setCellValue("单价");
row.createCell(5).setCellValue("材料金额");
 
row.createCell(7).setCellValue("日期");
row.createCell(8).setCellValue("技工");
row.createCell(9).setCellValue("工时数");
row.createCell(10).setCellValue("单价");
row.createCell(11).setCellValue("工时金额");
 
//填充数据
for (int i = 0; i < 10; i++) {
row=sheet.createRow(9+i+1);
row.createCell(0).setCellValue("日期");
row.createCell(1).setCellValue("维修事项");
row.createCell(2).setCellValue("材料清单");
row.createCell(3).setCellValue("数量");
row.createCell(4).setCellValue("单价");
row.createCell(5).setCellValue("材料金额");
 
row.createCell(7).setCellValue("日期");
row.createCell(8).setCellValue("技工");
row.createCell(9).setCellValue("工时数");
row.createCell(10).setCellValue("单价");
row.createCell(11).setCellValue("工时金额");
}
 
 
//第n+10行
row=sheet.createRow(9+10+1);
//cellRangeAddress=new CellRangeAddress(19,19,0,4);
//sheet.addMergedRegion(cellRangeAddress);
row.createCell(0).setCellValue("累计:");
row.createCell(1).setCellValue("xxx");
row.createCell(7).setCellValue("累计:");
row.createCell(8).setCellValue("xxx");
 
 
 
 
// 新建一输出文件流
FileOutputStream fOut = new FileOutputStream(outputFile);
// 把相应的Excel 工作簿存盘
workbook.write(fOut);
fOut.flush();
// 操作结束，关闭文件
fOut.close();
System.out.println("文件生成...");
} catch (Exception e) {
System.out.println("已运行 xlCreate() : " + e);
}
}
}