后台調用:
MultipartFile file;
List<String[]> excelDate = ExcelData.getExcelData(file);
package com.holike.crm.partner.sys; import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.List; import org.apache.log4j.Logger; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.Sheet; import org.apache.poi.ss.usermodel.Workbook; import org.apache.poi.xssf.usermodel.XSSFWorkbook; import org.springframework.web.multipart.MultipartFile; /** * 解析excel 上傳數據 * @author Administrator * */ public class ExcelData { private static final Logger log = Logger.getLogger(ExcelData.class); public static List<String[]> getExcelData(MultipartFile file) throws IOException{ checkFile(file); //獲得Workbook工作薄對象 Workbook workbook = getWorkBook(file); //創建返回對象,把每行中的值作為一個數組,所有行作為一個集合返回 List<String[]> list = new ArrayList<String[]>(); if(workbook != null){ for(int sheetNum = 0;sheetNum < workbook.getNumberOfSheets();sheetNum++){ //獲得當前sheet工作表 Sheet sheet = workbook.getSheetAt(sheetNum); if(sheet == null){ continue; } //獲得當前sheet的開始行 int firstRowNum = sheet.getFirstRowNum(); //獲得當前sheet的結束行 int lastRowNum = sheet.getLastRowNum(); //循環除了第一行的所有行 for(int rowNum = firstRowNum+1;rowNum <= lastRowNum;rowNum++){ //獲得當前行 Row row = sheet.getRow(rowNum); if(row == null){ continue; } //獲得當前行的開始列 int firstCellNum = row.getFirstCellNum(); //獲得當前行的列數 int lastCellNum = row.getLastCellNum(); String[] cells = new String[row.getLastCellNum()]; //循環當前行 for(int cellNum = firstCellNum; cellNum < lastCellNum;cellNum++){ Cell cell = row.getCell(cellNum); cells[cellNum] = getCellValue(cell); } list.add(cells); } } } return list; } /** * 檢查文件 * @param file * @throws IOException */ public static void checkFile(MultipartFile file) throws IOException{ //判斷文件是否存在 if(null == file){ log.error("文件不存在!"); } //獲得文件名 String fileName = file.getOriginalFilename(); //判斷文件是否是excel文件 if(!fileName.endsWith("xls") && !fileName.endsWith("xlsx")){ log.error(fileName + "不是excel文件"); } } public static Workbook getWorkBook(MultipartFile file) { //獲得文件名 String fileName = file.getOriginalFilename(); //創建Workbook工作薄對象,表示整個excel Workbook workbook = null; try { //獲取excel文件的io流 InputStream is = file.getInputStream(); //根據文件后綴名不同(xls和xlsx)獲得不同的Workbook實現類對象 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) { log.error(e.getMessage()); } return workbook; } public static String getCellValue(Cell cell){ String cellValue = ""; if(cell == null){ return cellValue; } //判斷數據的類型 switch (cell.getCellType()){ case Cell.CELL_TYPE_NUMERIC: //數字 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 = "未知類型"; break; } return cellValue; }
/** * 時間格式處理 * @return * @author Liu Xin Nan * @data 2017年11月27日 */ public static String stringDateProcess(Cell cell){ String result = new String(); if (HSSFDateUtil.isCellDateFormatted(cell)) {// 處理日期格式、時間格式 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) { // 處理自定義日期格式:m月d日(通過判斷單元格的格式id解決,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(); // 單元格設置成常規 if (temp.equals("General")) { format.applyPattern("#"); } result = format.format(value); } return result; }
}