POI操作xls表格文件

private void printExcelList(String templateFile, String writeFile,
			int beginRowIndex, String[] columns, boolean needIndex,
			List<Map<String, Object>> objectList) throws Exception {
		if(objectList != null && objectList.size() > 0
				&& columns != null && columns.length > 0
				&& templateFile != null && !templateFile.equals("")
				&& writeFile != null && !writeFile.equals("")){
				
				FileInputStream in = null;
			//先做输入文件的格式检查
			try{
				in = new FileInputStream(new File(templateFile));
			}catch(Exception e){
				throw new Exception("模板文件“" + templateFile + "”找不到！");
			}
			//做输出文件的格式检查
			String path = "";
			if(writeFile.lastIndexOf("\\") >= 0){
				path = writeFile.substring(0,writeFile.lastIndexOf("\\"));
			}else if(writeFile.lastIndexOf("/") >= 0){
				path = writeFile.substring(0,writeFile.lastIndexOf("/"));
			}else{
				throw new Exception("输出文件“" + writeFile + "”格式不正确！");
			}
			File pathFile = new File(path);
			if(!pathFile.exists()){
				pathFile.mkdirs();
			}
			FileOutputStream fileOut = new FileOutputStream(writeFile);			
			
			HSSFWorkbook hwb = new HSSFWorkbook(in);	
			HSSFCellStyle style1 = hwb.createCellStyle();
			style1.setFillForegroundColor(IndexedColors.YELLOW.getIndex());
			style1.setFillPattern(CellStyle.SOLID_FOREGROUND);
			style1.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直    
	        style1.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 水平
			style1.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下边框    
			style1.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左边框    
			style1.setBorderTop(HSSFCellStyle.BORDER_THIN);//上边框    
			style1.setBorderRight(HSSFCellStyle.BORDER_THIN);//右边框 
			
			HSSFCellStyle style2 = hwb.createCellStyle();
			HSSFFont font=hwb.createFont();
			font.setFontHeightInPoints((short)12);
			font.setFontName("宋体");
			font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
			style2.setFont(font);
			
			style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直    
	        style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 水平
			style2.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下边框    
			style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左边框    
			style2.setBorderTop(HSSFCellStyle.BORDER_THIN);//上边框    
			style2.setBorderRight(HSSFCellStyle.BORDER_THIN);//右边框
			
			HSSFCellStyle style3 = hwb.createCellStyle();
			style3.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直    
	        style3.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 水平
			style3.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下边框    
			style3.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左边框    
			style3.setBorderTop(HSSFCellStyle.BORDER_THIN);//上边框    
			style3.setBorderRight(HSSFCellStyle.BORDER_THIN);//右边框
			
			HSSFSheet sheet = hwb.getSheetAt(0);
			sheet.setDefaultRowHeight((short)540);
			int sn = 0;
			for(int i = 0; i < objectList.size(); i++) {
				Map<String,Object> map = objectList.get(sn);
				
				HSSFRow row;
				row = sheet.createRow(i + beginRowIndex);
				row.setHeight((short)540);
				HSSFCell cell = null;
				int startCellNum = 0;
				//如果需要添加序号一列，则将序号一列置于第一列，后面的内容值依次往后面移一个单元格
				if(needIndex){
					startCellNum = 1;
					cell = row.createCell(0);
					cell.setCellValue(i+1);
				}
				for(int index = 0; index < columns.length; index++){
					cell = row.createCell(index + startCellNum);
					if(index==0){		
						cell.setCellStyle(style1);
					}else if(index==2){
						cell.setCellStyle(style2);
					}else{
						cell.setCellStyle(style3);
					}
					cell.setCellValue(map.get(columns[index]) == null ? "" : map.get(columns[index]).toString());
				}
				sn ++;
			}
			
			hwb.write(fileOut);
			fileOut.flush();
			fileOut.close();
			in.close();
			
		}else{
			throw new Exception("传入主要参数不能有空");
		}