POI create Excel

there needs to be added depend pom

  <!--poi-->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.15-beta2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.15-beta2</version>
        </dependency>
        <!--poi-->
        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.9</version>
        </dependency>

package com.it.dingkaparent.test;


import org.apache.commons.lang3.RandomStringUtils;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import java.io.File;
import java.io.FileOutputStream;

/**
 * @Author: Cma
 * @Date: 2019-10-15
 * @Time: 22:17
 * @ClassName: POICreateExcelTest
 * @Description:  POI创建Excel
 */
public class POICreateExcelTest {
    public static void main(String[] args) throws Exception {
        String []title = {"订单ID","流水号","测试号"};
        //创建HSSF工作薄,文档对象HSSFWorkbook
        HSSFWorkbook workbook = new HSSFWorkbook();
        //创建一个Sheet页，HSSFSheet 表单对象,需要几个sheet页自己看着修改即可
        HSSFSheet sheet = workbook.createSheet("sheet1");
        HSSFSheet sheet2 = workbook.createSheet("sheet2");
        //创建第一行（一般是表头）
        HSSFRow row0 = sheet.createRow(0);//sheet1
        HSSFRow row2 = sheet2.createRow(0);//sheet2
        //创建列，HSSFCell列
        HSSFCell cell = null;
        //设置表头，循环上面的数组，希望朋友不要忘记数组是length,集合是size();
        for (int i = 0; i <title.length ; i++) {
            cell=row0.createCell(i);
            cell.setCellValue(title[i]);
        }
        //填充20行数据
        for (int i = 1; i < 20; i++) {
            HSSFRow row =sheet.createRow(i);//新建第一行
            HSSFCell cell1 = row.createCell(0);//新建第一个单元格
            cell1.setCellValue(RandomStringUtils.randomNumeric(18));
            HSSFCell cell2 = row.createCell(1);//新建第二个单元格
            cell2.setCellValue(RandomStringUtils.randomNumeric(12));
            HSSFCell cell3 = row.createCell(2);//新建第三个单元格
            cell3.setCellValue(RandomStringUtils.randomNumeric(3));
        }
        //保存到本地
        File file = new File("D:/poi/test.xls");
        FileOutputStream outputStream = new FileOutputStream(file);
        //将Excel写入输出流中
        workbook.write(outputStream);
        outputStream.flush();
        outputStream.close();
    }
}