在Excel导入过程中经常遇到单元格数据格式不正确引发的错误，在赋值前需要做下类型转换。
提供一个类型转换工具类:
1 /** 2 * 单元格类型转化工具类 3 * @param cell 4 * @return 5 */ 6 private Map<String,Object> cellTypeDefine(Cell cell){ 7 Map<String,Object> map = new HashMap<>(); 8 switch (cell.getCellType()) { 9 case Cell.CELL_TYPE_BOOLEAN: 10 map.put("COL", cell.getBooleanCellValue()); 11 break; 12 case Cell.CELL_TYPE_NUMERIC: 13 map.put("COL", cell.getNumericCellValue()); 14 break; 15 case Cell.CELL_TYPE_STRING: 16 map.put("COL", cell.getStringCellValue()); 17 break; 18 case Cell.CELL_TYPE_BLANK: 19 map.put("COL",""); 20 break; 21 case Cell.CELL_TYPE_FORMULA: 22 map.put("COL", cell.getCellFormula()); 23 break; 24 case Cell.CELL_TYPE_ERROR: 25 map.put("COL",""); 26 break; 27 default: 28 map.put("COL", ""); 29 break; 30 } 31 return map; 32 } Excel导入demo实例：
1 public class ExcelImport { 2 3 public String excelImport(File file) { 4 HashMap<String, Sheet> typeSheet = null; 5 List<CmWiringPo> wiringlist = new ArrayList<>(); 6 try{ 7 HSSFWorkbook workbook = new HSSFWorkbook() ; 8 typeSheet = Maps.newHashMap(); 9 Cell cell = null; 10 Row row = null; 11 HSSFSheet sheet = workbook.getSheetAt(0); 12 String sheetName = sheet.getSheetName(); 13 typeSheet.put(sheetName, sheet); 14 15 for(int j=1;j < sheet.getLastRowNum()+1;j++){ 16 row = sheet.getRow(j); 17 CmWiringPo cmWiringPo = new CmWiringPo() ; 18 //主键生成 19 cmWiringPo.setId(11L); 20 for(int k=0;k < row.getLastCellNum();k++){ 21 cell = row.getCell(k); 22 switch (k) { 23 case 0: 24 Long srid = (long)cell.getNumericCellValue(); 25 cmWiringPo.setSrid(srid); 26 break; 27 case 1: 28 cmWiringPo.setSourceCabinetUName(String.valueOf(cellTypeDefine(cell).get("COL"))); 29 break; 30 31 default: 32 break; 33 } 34 } 35 } 36 37 }catch (Exception e) { 38 39 return null; 40 } 41 return wiringlist.toString(); 42 }