java poi excel导出

/**
	 * 
	 * @param infomation  资料信息
	 * @return 资料文件名称 ，资料文件路径
	 * @throws FileNotFoundException 
	 */
	@SuppressWarnings("unchecked")
	public Map<String, String> infomationExport(List<Map<String, String>> infomation) {
		
		HSSFWorkbook workbook = new HSSFWorkbook();
		
		//存储文件内容的map
		Map<String,String> fileMap= new HashMap<String,String>();
		
			HSSFSheet sheet = workbook.createSheet(Constants.CONSTANT_EXCEL_SHEET_NAME);
			File file = new File(Constants.CONSTANT_EXCEL03_TEMPLATE);
			
			
			//将表头值存储文件
			Map<String,String> headerMap= new HashMap<String,String>();
			headerMap =	getHeaderInfomation(infomation);
			//创建第一行
			HSSFRow firstRow = sheet.createRow(0);
			int firstRowCellIndex = 0 ;
			
			//存储表头的下标及key
			Map<String,Short> headerMapCollection = new HashMap<String,Short>();
			
			//循环第一行所有列
			for (Iterator iterator = headerMap.entrySet().iterator(); iterator.hasNext();) {
				
				Map.Entry<String, String> firstMap = (Map.Entry<String, String>) iterator.next();
				HSSFCell firstCell = firstRow.createCell((short)firstRowCellIndex);
				headerMapCollection.put(firstMap.getKey(), firstCell.getCellNum());
				firstCell.setCellType(HSSFCell.CELL_TYPE_STRING);
				firstCell.setEncoding(HSSFCell.ENCODING_UTF_16);
				if(null == firstMap.getKey()){
					firstCell.setCellValue("");
				}
				else{
					firstCell.setCellValue(firstMap.getKey());
				}
				firstRowCellIndex ++;
			}
			
		/**
		 * 循环列表	
		 */
			int rowIndex = 1;
		for (Iterator iterator = infomation.iterator(); iterator.hasNext();) {
			Map<String, String> map = (Map<String, String>) iterator.next();
			
			//根据资料的行数创建资料文件行数
			HSSFRow row = sheet.createRow(rowIndex);
			
			//循环所有列
			for (Iterator fileIterator = map.entrySet().iterator(); fileIterator.hasNext();) {
				
				Map.Entry<String, String> rowMap = (Map.Entry<String, String>) fileIterator.next();
					for (Iterator iteratorCell = headerMapCollection.entrySet().iterator(); iteratorCell.hasNext();) {
						Map.Entry<String, Short> headerMapValue = (Map.Entry<String, Short>) iteratorCell.next();
						if(null != rowMap.getKey() && null != headerMapValue.getKey()){
							if(rowMap.getKey().equals(headerMapValue.getKey()) ){
								saveInfomation(row, rowMap, headerMapValue);
							}
						}
						else
						{
							if(rowMap.getKey()==headerMapValue.getKey() ){
								saveInfomation(row, rowMap, headerMapValue);
							}
						}
					}
			}
			rowIndex++;
		}
		FileOutputStream out;
		try {
			out = new FileOutputStream(file);
			fileMap.put(file.getName(),file.getAbsolutePath());
			workbook.write(out);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return fileMap;
	}