使用apache poi修改現有的excel

Question

當我修改服務器中現有的excel文件並複製到本地機器並打開它時，我得到excel could not open because some content is unreadable, do you want to open and repair this workbook?下面是我的代碼。有人可以建議我如何避免這種情況？

File f = new File(directory+"users.xlsx"); 
FileInputStream fileInputStream = new FileInputStream(f); 

workbook = new XSSFWorkbook(fileInputStream); 
sheet = workbook.getSheetAt(0); 
Row row = sheet.getRow(4); 
for(int i = 0; i<5; i++) 
{ 
Cell cell = row1.getCell(i); 
cell.setCellValue(formattedDate); 
cell.setCellStyle(normalStyle); 
} 

FileOutputStream out = new FileOutputStream(f, false); 
       workbook.write(out); 
       out.close(); 

一直試圖解決8小時，沒有運氣。如果有人能夠闡明這一點，會很感激。

Answer 1

移動輸出到不同的文件，不要忘記關閉輸入和輸出 並使用此http://poi.apache.org/apidocs/org/apache/poi/ss/usermodel/WorkbookFactory.html

File f = new File(directory+"users.xlsx"); 

FileInputStream fileInputStream = new FileInputStream(f); 

Workbook workbook = WorkbookFactory.create(fileInputStream); 
fileInputStream.close(); 
sheet = workbook.getSheetAt(0); 
Row row = sheet.getRow(4); 
for(int i = 0; i<5; i++) 
{ 
Cell cell = row1.getCell(i); 
cell.setCellValue(formattedDate); 
cell.setCellStyle(normalStyle); 
} 

FileOutputStream out = new FileOutputStream(f, false); 
       workbook.write(out); 
       out.close();