java 使用apache POI 解析读取 Excel

这段时间重新作回开发，接手一个EXCEL文件读取任务。关键代码如下，代码功能尚不完全，诸君使用时需要自己斟酌。

//Excel单元格 数据格式转换,xls,xlsx文件支持
	private String getCellValue(Cell cell){
		String str=null;
		if(cell instanceof XSSFCell){
			XSSFCell xssfCell = (XSSFCell)cell;
			if(xssfCell.getCellType()==Cell.CELL_TYPE_NUMERIC){
				if(HSSFDateUtil.isCellDateFormatted(xssfCell)){
					double d = xssfCell.getNumericCellValue();
					Date date = HSSFDateUtil.getJavaDate(d);
					SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
					str = dateFormat.format(date);
				}else{
					double val =xssfCell.getNumericCellValue();
					int intVal=new Double(val).intValue();
					str = Integer.toString(intVal);
				}
			}else if(xssfCell.getCellType()==Cell.CELL_TYPE_BOOLEAN){
				boolean  bl= xssfCell.getBooleanCellValue();
				str =Boolean.toString(bl);
			}else if(xssfCell.getCellType()==Cell.CELL_TYPE_STRING){
				str = xssfCell.getStringCellValue();
			}else if(xssfCell.getCellType()==Cell.CELL_TYPE_FORMULA){
				double formula = xssfCell.getNumericCellValue();
				if(HSSFDateUtil.isValidExcelDate(formula)){
					Date date = HSSFDateUtil.getJavaDate(formula);
					SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
					str = dateFormat.format(date);
				}else{
					int intVal=new Double(formula).intValue();
					str = Integer.toString(intVal);
				}
			}else if(xssfCell.getCellType()==Cell.CELL_TYPE_BLANK){
				str="";
			}
		}else if (cell instanceof HSSFCell){
			HSSFCell hssfCell = (HSSFCell)cell;
			if(hssfCell.getCellType()==Cell.CELL_TYPE_NUMERIC){
				if(HSSFDateUtil.isCellDateFormatted(hssfCell)){
					double d = hssfCell.getNumericCellValue();
					Date date = HSSFDateUtil.getJavaDate(d);
					SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
					str = dateFormat.format(date);
				}else{
					double val =hssfCell.getNumericCellValue();
					int intVal=new Double(val).intValue();
					str = Integer.toString(intVal);
				}
			}else if(hssfCell.getCellType()==Cell.CELL_TYPE_BOOLEAN){
				boolean  bl= hssfCell.getBooleanCellValue();
				str =Boolean.toString(bl);
			}else if(hssfCell.getCellType()==Cell.CELL_TYPE_STRING){
				str = hssfCell.getStringCellValue();
			}else if(hssfCell.getCellType()==Cell.CELL_TYPE_FORMULA){
				double formula = hssfCell.getNumericCellValue();
				if(HSSFDateUtil.isValidExcelDate(formula)){
					Date date = HSSFDateUtil.getJavaDate(formula);
					SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
					str = dateFormat.format(date);
				}else{
					int intVal=new Double(formula).intValue();
					str = Integer.toString(intVal);
				}
			}else if(hssfCell.getCellType()==Cell.CELL_TYPE_BLANK){
				str="";
			}
		}
		return str;
	}

 偷个懒贴上关键代码

	private void excelRead(MultipartFile file){
		
		Info info =null;
		// excel文件解析
		XSSFWorkbook workbook = null;
		try {
			
			workbook = new XSSFWorkbook(file.getInputStream());
			XSSFSheet sheet = workbook.getSheetAt(0);
			
			List<Info> InfoList = new ArrayList<Info>();

			for(int i=sheet.getFirstRowNum()+1;i<=sheet.getLastRowNum();i++){
				
					Row row = sheet.getRow(i);
					
					info = new Info();
					
					XSSFCell id = (XSSFCell) row.getCell(0);					
					//读到空行时终止
					if(id==null){
						break;
					}
					info.setId(getCellValue(dealerId));
					
					XSSFCell date =(XSSFCell)row.getCell(7);
					//日期
					try {
						info.setDate(DateUtils.parseDate(getCellValue(date), "yyyy-MM-dd"));
					} catch (ParseException e) {
						e.printStackTrace();
					}
					//电话号码需要特殊转换
					XSSFCell phone =(XSSFCell)row.getCell(8);
					phone.setCellType(Cell.CELL_TYPE_STRING);
					info.setPhone(getCellValue(phone));
					
					XSSFCell installRemark =(XSSFCell)row.getCell(9);
					info.setRemark(getCellValue(installRemark));
					
					//将clientInstallInfo 对象添加至list中
					infoList.add(info);
				
			}

			for(int size=0;size<infoList.size();size++){
				//spring data jpa
				infoService.save(infoList.get(size));
			}

		} catch (IOException e) {
			e.printStackTrace();
		} 
	}

 其他的Wookbook操作代码：

	
	//获取Excel xls,xlsx 格式文件 ,返回为List<Map<Integer,String>>
	private List<Map<Integer,String>> getExcelResult(Workbook workbook){
		
		List<Map<Integer,String>> resultList = new ArrayList<Map<Integer,String>>();
		
		Map<Integer,String> rowMap = null;
		
		//获取Excel文档中工作薄个数
		int num = workbook.getNumberOfSheets();
		
		if (workbook instanceof XSSFWorkbook){
			//获取第一个工作薄
			XSSFSheet xssfSheet =(XSSFSheet)workbook.getSheetAt(0);
			
			int rows=xssfSheet.getPhysicalNumberOfRows();
			for(int i =1;i<=rows;i++){
				XSSFRow xssfRow = xssfSheet.getRow(i);
				rowMap = new HashMap<Integer, String>();
				System.out.println(xssfRow);
				short minColIx = xssfRow.getFirstCellNum();
				short maxColIx = xssfRow.getLastCellNum();
				for(short colIx=minColIx; colIx<maxColIx; colIx++) {
					XSSFCell xssfCell = xssfRow.getCell(colIx);
					if(xssfCell == null) {
						continue;
				   }
					xssfCell.setCellType(Cell.CELL_TYPE_STRING);
					int cIndex =xssfCell.getColumnIndex();
					if(xssfCell.getStringCellValue().equals("")){
						rowMap.put(cIndex,"");
					}else{
						rowMap.put(cIndex, xssfCell.getStringCellValue());
					}
				 }
				resultList.add(rowMap);
			}
			
		}else if(workbook instanceof HSSFWorkbook){
			//获取第一个工作薄
			HSSFSheet hssfSheet =(HSSFSheet)workbook.getSheetAt(0);
			//Map<Integer,String> rowMap = null;
			int rows=hssfSheet.getPhysicalNumberOfRows();
			for(int i =1;i<=rows;i++){
				HSSFRow hssfRow = hssfSheet.getRow(i);
				rowMap = new HashMap<Integer, String>();
				short minColIx = hssfRow.getFirstCellNum();
				short maxColIx = hssfRow.getLastCellNum();
				for(short colIx=minColIx; colIx<maxColIx; colIx++) {
					int col = colIx;
					HSSFCell hssfCell = hssfRow.getCell(col);
					if(hssfCell == null) {
						continue;
				   }
					hssfCell.setCellType(Cell.CELL_TYPE_STRING);
					int cIndex =hssfCell.getColumnIndex();
					if(hssfCell.getStringCellValue().equals("")){
						rowMap.put(cIndex,"");
					}else{
						rowMap.put(cIndex, hssfCell.getStringCellValue());
					}
				 }
				resultList.add(rowMap);
			}
		}
		return resultList;
	}