java使用POI讀取excel檔案，相容xls和xlsx
阿新 • • 發佈：2019-01-09
public List<Double> readExcels(InputStream is)throws Exception{
List<Double> xlsxList = new ArrayList<Double>();
try {
if(is ==null){
throw new IOException("檔案不正確！");
}
Workbook workbook = WorkbookFactory.create(is);
FormulaEvaluator fe = workbook.getCreationHelper().createFormulaEvaluator();
//獲取第一張表
Sheet sheet = workbook.getSheetAt(0);
if(sheet == null){
throw new IOException("傳入的excel的第一張表為空！");
}
for(int rowNum = 0;rowNum <= sheet.getLastRowNum(); rowNum++){
Row row = sheet.getRow(rowNum);
if(row != null){
//獲得當前行的開始列
int firstCellNum = row.getFirstCellNum();
//獲得當前行的列數
int lastCellNum = row.getPhysicalNumberOfCells();
String result = "";
//迴圈當前行
for(int cellNum = firstCellNum; cellNum < lastCellNum;cellNum++){
Cell cell = row.getCell(cellNum);
double value = 0;
if(null!=fe.evaluate(cell)){
value = fe.evaluate(cell).getNumberValue();
}
result = result + cellNum + ":"+value + "----";
}
System.out.println("result---"+result);
}
}
is.close();
} catch (FileNotFoundException e) {
throw new Exception("檔案不正確!");
}
return xlsxList;
}
public static void main(String[] args) throws Exception {
InputStream is = new FileInputStream("D:\\test.xlsx");
ReadExcel re = new ReadExcel();
re.readExcels(is);
}
}
List<Double> xlsxList = new ArrayList<Double>();
try {
if(is ==null){
throw new IOException("檔案不正確！");
}
Workbook workbook = WorkbookFactory.create(is);
FormulaEvaluator fe = workbook.getCreationHelper().createFormulaEvaluator();
//獲取第一張表
Sheet sheet = workbook.getSheetAt(0);
if(sheet == null){
throw new IOException("傳入的excel的第一張表為空！");
}
for(int rowNum = 0;rowNum <= sheet.getLastRowNum(); rowNum++){
Row row = sheet.getRow(rowNum);
if(row != null){
//獲得當前行的開始列
int firstCellNum = row.getFirstCellNum();
//獲得當前行的列數
int lastCellNum = row.getPhysicalNumberOfCells();
String result = "";
//迴圈當前行
for(int cellNum = firstCellNum; cellNum < lastCellNum;cellNum++){
Cell cell = row.getCell(cellNum);
double value = 0;
if(null!=fe.evaluate(cell)){
value = fe.evaluate(cell).getNumberValue();
}
result = result + cellNum + ":"+value + "----";
}
System.out.println("result---"+result);
}
}
is.close();
} catch (FileNotFoundException e) {
throw new Exception("檔案不正確!");
}
return xlsxList;
}
public static void main(String[] args) throws Exception {
InputStream is = new FileInputStream("D:\\test.xlsx");
ReadExcel re = new ReadExcel();
re.readExcels(is);
}
}