java poi解析上传的Excel文件
package com.zhl.push.Utils; /** * @Author TAO * @ClassName ExcelData * @Description TODO * @Date 2019/1/9 15:02 * @Version 1.0 */ 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.ByteArrayInputStream; import java.io.ByteArrayOutputStream; 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.HashMap; import java.util.List; /** * 解析excel 上传数据 */ public class AnalysisExcelData { /** * @Author * @Description //TODO * @Date 2019/8/15 12:14 * @Param file ：上传的excel文件 * @return * @param null */ public static List<List> getExcelData(MultipartFile file) throws IOException { checkFile(file); //获得Workbook工作薄对象 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<List> list = new ArrayList<>(); 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的结束行 int lastRowNum = sheet.getLastRowNum(); //循环除了所有行,如果要循环除第一行以外的就firstRowNum+1 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(); if (lastCellNum > 0) { ArrayList<Object> cellValues = new ArrayList<>(); //循环当前行 for (int cellNum = firstCellNum; cellNum < lastCellNum; cellNum++) { Cell cell = row.getCell(cellNum); cellValues.add(getCellValue(cell)); } list.add(cellValues); } } } } return list; } /** * 检查文件 * * @param file * @throws IOException */ public static void checkFile(MultipartFile file) throws IOException { //判断文件是否存在 if (null == file) { System.err.println("文件不存在！"); } //获得文件名 String fileName = file.getOriginalFilename(); //判断文件是否是excel文件 if (!fileName.endsWith("xls") && !fileName.endsWith("xlsx")) { System.err.println("不是excel文件"); } } public static Workbook getWorkBook(MultipartFile file) { //获得文件名 String fileName = file.getOriginalFilename(); //创建Workbook工作薄对象，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")) { //2003 workbook = new HSSFWorkbook(is); } else if (fileName.endsWith("xlsx")) { //2007 及2007以上 workbook = new XSSFWorkbook(is); } } catch (IOException e) { e.getMessage(); } return workbook; } public static String getCellValue(Cell cell) { String cellValue = ""; if (cell == null) { return cellValue; } //判断数据的类型 //判断数据的类型 switch (cell.getCellTypeEnum()) { case NUMERIC: //数字 cellValue = stringDateProcess(cell); break; case STRING: //字符串 cellValue = String.valueOf(cell.getStringCellValue()); break; case BOOLEAN: //Boolean cellValue = String.valueOf(cell.getBooleanCellValue()); break; case FORMULA: //公式 cellValue = String.valueOf(cell.getCellFormula()); break; case BLANK: //空值 cellValue = ""; break; case ERROR: //故障 cellValue = "非法字符"; break; default: cellValue = "未知类型"; break; } return cellValue; } 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 {// 日期 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; } public static InputStream convertorStream(Workbook workbook) { InputStream in = null; try { //临时缓冲区 ByteArrayOutputStream out = new ByteArrayOutputStream(); //创建临时文件 workbook.write(out); byte[] bookByteAry = out.toByteArray(); in = new ByteArrayInputStream(bookByteAry); } catch (Exception e) { e.printStackTrace(); } return in; } }