导出Excel到ListMap中工具类

/**
 * 将Excel数据读取到ListMap
 * @param file
 */
  public static List<Map<String, Object>> readExcelDataToListMap(MultipartFile file) {
      String edition_2003 = "^.+\\.(?i)(xls)$";        // Excel_2003版本
      String edition_2007 = "^.+\\.(?i)(xlsx)$";    // Excel_2007版本
      String fileName = file.getOriginalFilename();    // 获取文件名
      if (StringUtils.isNotBlank(fileName)) {               
            try {               
                // 根据Excel版本创建对象
                Workbook wb = null;
                if (fileName.matches(edition_2003)) {                 
                    wb = new HSSFWorkbook(file.getInputStream());
                } else {
                if (fileName.matches(edition_2007)) {                        
                    wb = new XSSFWorkbook(file.getInputStream());
                }
                }                 
                // 读取Excel里面的数据
                if (null != wb) {                    
                   // 得到第一个shell
                    Sheet sheet = wb.getSheetAt(0);
                    // 得到Excel的行数
                    int totalRows = sheet.getPhysicalNumberOfRows();
                    // 得到Excel的列数(前提是有行数)
                    int totalCells = 0;
                    if (totalRows > 1 && sheet.getRow(0) != null) {
                        totalCells = sheet.getRow(0).getPhysicalNumberOfCells();
                    }
                    List<Map<String, Object>> listMap = new ArrayList<Map<String, Object>>();
                    // 循环Excel行数
                    for (int r = 1; r < totalRows; r++) {
                        Row row = sheet.getRow(r);
                      if (row == null) {
                          continue;
                      }            
                      // 循环Excel的列
                      Map<String, Object> map = new HashMap<String, Object>();
                      for (int c = 0; c < totalCells; c++) {
                          Cell cell = row.getCell(c);
                          if (null != cell) {
                              int cellType = cell.getCellType();                   
                              if (cellType == 0) {                        
                                  DataFormatter dataFormatter = new DataFormatter();
                                  dataFormatter.addFormat("###########", null);
                                  String str = dataFormatter.formatCellValue(cell);                        
                                  if (StringUtils.isNotBlank(str)) {                            
                                      map.put(c+"",str);
                              }
                              }else{
                                  String str = String.valueOf(cell);
                                  if (StringUtils.isNotBlank(str)) {                        
                                  map.put(c+"",str);
                                  } 
                              }
                          } 
                      }
                      // 添加到list
                      if (map.size() > 0) {                
                         listMap.add(map);
                      }
                    }
                    return listMap;                                        
               }
             } catch (Exception e) {
                  e.printStackTrace();
             }
        }                        
        return null;
  }

标签：String,Excel,导出,ListMap,cell,str,new,null
来源： https://www.cnblogs.com/tangchunlong66/p/14870528.html