package com.example.excelupload.commons; import org.apache.logging.log4j.Logger; import org.apache.poi.hssf.usermodel.HSSFDataFormat; import org.apache.poi.hssf.usermodel.HSSFDateUtil; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.ss.usermodel.*; import org.apache.poi.xssf.usermodel.XSSFWorkbook; import org.springframework.web.multipart.MultipartFile; import java.io.IOException; import java.io.InputStream; import java.text.DecimalFormat; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.List; /** * 解析excel上传数据 */ public class ExcelData { // private static final Logger log = Logger.getLogger(ExcelData.class); public static List<String[]> getExcelData(MultipartFile file){ checkFile(file); Workbook workbook = getWorkBook(file); //创建返回对象,把每行中的值作为一个数组,所有行作为一个集合返回 List<String[]> list = new ArrayList<String[]>(); if(workbook!=null){ for(int sheetNum = 0;sheetNum < workbook.getNumberOfSheets();sheetNum++){ //获得当前sheet工作表 Sheet sheet = workbook.getSheetAt(sheetNum); if(sheet==null){ continue; } //获得当前sheet的开始行 int firstRowNum = sheet.getFirstRowNum(); //获得当前sheet的结束航 int lastRowNum = sheet.getLastRowNum(); //循环除了第一行的所有行 for(int rowNum = firstRowNum+1;rowNum < lastRowNum;rowNum++){ //获得当前行 Row row = sheet.getRow(rowNum); if(row == null){ continue; } //获得当前行的开始列 int firstCellNum = row.getFirstCellNum(); //获得当前行的列数 int lastCellNum = row.getLastCellNum(); String[] cells = new String[lastCellNum]; //循环当前行 for(int cellNum = firstCellNum;cellNum<lastCellNum;cellNum++){ Cell cell = row.getCell(cellNum); cells[cellNum] = getCellValue(cell); } list.add(cells); } } } return list; } public static void checkFile(MultipartFile file){ //判断文件是否存在 if(null == file){ // log.error("文件不存在!"); } //获取文件名 String fileName = file.getOriginalFilename(); //判断文件名是否是excel文件 if(!fileName.endsWith("xls") && !fileName.endsWith("xlsx")){ System.out.print("不是excel文件!"); } } public static Workbook getWorkBook(MultipartFile file){ //获取文件名 String fileName = file.getOriginalFilename(); //创建workbook工作簿对象,表示整个excel Workbook workbook = null; try { //获取excel文件的io流 InputStream is = file.getInputStream(); //根据文件后缀名不同(xls和xlsx)获得不同的workbook实现类对象 if(fileName.endsWith("xls")){ workbook = new HSSFWorkbook(is); }else if(fileName.endsWith("xlsx")){ workbook = new XSSFWorkbook(is); } } catch (IOException e) { e.printStackTrace(); } return workbook; } public static String getCellValue(Cell cell){ String cellValue = ""; if(cell == null){ return cellValue; } //判断数据的类型 switch (cell.getCellType()){ case Cell.CELL_TYPE_NUMERIC: //数字 cellValue = stringDateProcess(cell); break; case Cell.CELL_TYPE_STRING: //字符串 cellValue = String.valueOf(cell.getStringCellValue()); break; case Cell.CELL_TYPE_BOOLEAN: //Boolean cellValue = String.valueOf(cell.getBooleanCellValue()); break; case Cell.CELL_TYPE_FORMULA: //公式 cellValue = String.valueOf(cell.getCellFormula()); break; case Cell.CELL_TYPE_BLANK: //空值 cellValue = ""; break; case Cell.CELL_TYPE_ERROR: //故障 cellValue = "非法字符"; break; default: cellValue = "未知类型"; break; } return cellValue; } /** * 时间格式处理 */ public static String stringDateProcess(Cell cell){ String result = new String(); if(HSSFDateUtil.isCellDateFormatted(cell)){//处理日期格式、时间格式 SimpleDateFormat sdf = null; if(cell.getCellStyle().getDataFormat()==HSSFDataFormat.getBuiltinFormat("h:mm")){ sdf = new SimpleDateFormat("HH:mm"); }else{ sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); } Date date = cell.getDateCellValue(); result = sdf.format(date); }else if(cell.getCellStyle().getDataFormat() == 58){ //处理自定义日期格式:m月d日(通过判断单元格的格式id解决,id的值是58) SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); double value = cell.getNumericCellValue(); Date date = org.apache.poi.ss.usermodel.DateUtil.getJavaDate(value); result = sdf.format(date); }else{ double value = cell.getNumericCellValue(); CellStyle style = cell.getCellStyle(); DecimalFormat format = new DecimalFormat(); String temp = style.getDataFormatString(); //单元格设置成常规 if(temp.equals("General")){ format.applyPattern("#"); } result = format.format(value); } return result; } }
poi实现excel上传
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