createdatecells.java

Office格式转换代码

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package org.apache.poi.hssf.usermodel.examples;

import org.apache.poi.hssf.usermodel.*;

import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Date;

/**
 * An example on how to cells with dates.  The important thing to note
 * about dates is that they are really normal numeric cells that are
 * formatted specially.
 *
 * @author Glen Stampoultzis (glens at apache.org)
 */
public class CreateDateCells
{
    public static void main(String[] args)
        throws IOException
    {
        HSSFWorkbook wb = new HSSFWorkbook();
        HSSFSheet sheet = wb.createSheet("new sheet");

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

        // Create a cell and put a date value in it.  The first cell is not styled as a date.
        HSSFCell cell = row.createCell((short)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.
        HSSFCellStyle cellStyle = wb.createCellStyle();
        cellStyle.setDataFormat(HSSFDataFormat.getBuiltinFormat("m/d/yy h:mm"));
        cell = row.createCell((short)1);
        cell.setCellValue(new Date());
        cell.setCellStyle(cellStyle);

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

    }
}