Java org.apache.poi使用日期单元格创建excel工作簿

我用java编写的日期格式是：“2014.01.31 14:24:28”。我想使用ApachePOI库将其放入excel，单元格格式类型为：“date”。 我怎样才能做到这一点呢？

检查：以所需格式更改日期并使用它

Workbook wb = new HSSFWorkbook();
//Workbook wb = new XSSFWorkbook();
CreationHelper createHelper = wb.getCreationHelper();
Sheet sheet = wb.createSheet("new sheet");

// Create a row and put some cells in it. Rows are 0 based.
Row row = sheet.createRow(0);

// Create a cell and put a date value in it.  The first cell is not styled
// as a date.
Cell cell = row.createCell(0);
cell.setCellValue(new Date());

// we style the second cell as a date (and time).  It is important to
// create a new cell style from the workbook otherwise you can end up
// modifying the built in style and effecting not only this cell but other cells.
CellStyle cellStyle = wb.createCellStyle();
cellStyle.setDataFormat(
    createHelper.createDataFormat().getFormat("yyyy/mm/dd hh:mm:ss"));
cell = row.createCell(1);
cell.setCellValue(new Date());
cell.setCellStyle(cellStyle);

//you can also set date as java.util.Calendar
cell = row.createCell(2);
cell.setCellValue(Calendar.getInstance());
cell.setCellStyle(cellStyle);

// Write the output to a file
FileOutputStream fileOut = new FileOutputStream("workbook.xls");
wb.write(fileOut);
fileOut.close();

检查：以所需格式更改日期并使用该格式

Workbook wb = new HSSFWorkbook();
//Workbook wb = new XSSFWorkbook();
CreationHelper createHelper = wb.getCreationHelper();
Sheet sheet = wb.createSheet("new sheet");

// Create a row and put some cells in it. Rows are 0 based.
Row row = sheet.createRow(0);

// Create a cell and put a date value in it.  The first cell is not styled
// as a date.
Cell cell = row.createCell(0);
cell.setCellValue(new Date());

// we style the second cell as a date (and time).  It is important to
// create a new cell style from the workbook otherwise you can end up
// modifying the built in style and effecting not only this cell but other cells.
CellStyle cellStyle = wb.createCellStyle();
cellStyle.setDataFormat(
    createHelper.createDataFormat().getFormat("yyyy/mm/dd hh:mm:ss"));
cell = row.createCell(1);
cell.setCellValue(new Date());
cell.setCellStyle(cellStyle);

//you can also set date as java.util.Calendar
cell = row.createCell(2);
cell.setCellValue(Calendar.getInstance());
cell.setCellStyle(cellStyle);

// Write the output to a file
FileOutputStream fileOut = new FileOutputStream("workbook.xls");
wb.write(fileOut);
fileOut.close();

试试这个

DateFormat DateFormat=新的SimpleDataFormat（“yyyy/MM/dd”）；
HSSFCell-myCell；
myCell.setCellValue（dateFormat.format（“2014.01.31 14:24:28”）；

试试这个

DateFormat DateFormat=新的SimpleDataFormat（“yyyy/MM/dd”）；
HSSFCell-myCell；
myCell.setCellValue（dateFormat.format（“2014.01.31 14:24:28”）；