java操作Excel的poi 格式設置

格式設置

　　

package com.java.poi;

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

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

/**
 * 格式化
 * @author nidegui
 * @create 2019-06-17 9:46
 */
public class Test4 {

    public static void main(String[] args) throws Exception {
        Workbook wb=new HSSFWorkbook();
        Sheet sheet = wb.createSheet("創建sheet頁");
        Row row = sheet.createRow(0);//創建行
        Cell cell = row.createCell(0);//創建一個單元格， 第一列
        cell.setCellValue(new Date());  //給單元格設置值

        CreationHelper creationHelper = wb.getCreationHelper();


        CellStyle cellStyle = wb.createCellStyle();  //創建工作簿的樣式
        cellStyle.setDataFormat(creationHelper.createDataFormat().getFormat("yyyy-mm-dd hh:mm:ss"));
        cell=row.createCell(1); //第二列
        cell.setCellValue(new Date());
        cell.setCellStyle(cellStyle);

        /**
         * 第二中樣式
         */
        row.createCell(2); //第三列
        cell.setCellValue(Calendar.getInstance());
        cell.setCellStyle(cellStyle);


        FileOutputStream fileOutputStream=new FileOutputStream("E:\\3.xls");
        wb.write(fileOutputStream);
        fileOutputStream.close();
    }
}