首先导入依赖

<dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>3.16</version>
</dependency>
<dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>3.16</version>
</dependency>

其次写个测试类

public class ExcelTest {/*** 基于POI向Excel文件写入数据* @throws Exception*/public static void write() throws Exception{//在内存中创建一个Excel文件对象XSSFWorkbook excel = new XSSFWorkbook();//创建Sheet页XSSFSheet sheet = excel.createSheet("rejiao");//在Sheet页中创建行，0表示第1行XSSFRow row1 = sheet.createRow(0);//创建单元格并在单元格中设置值，单元格编号也是从0开始，1表示第2个单元格row1.createCell(0).setCellValue("pushId");for (int i = 0; i < 9999; i++) {XSSFRow row2 = sheet.createRow(i+1);row2.createCell(0).setCellValue("push" + (10000 + i));}FileOutputStream out = new FileOutputStream(new File("D:\\rejiao.xlsx"));//通过输出流将内存中的Excel文件写入到磁盘上excel.write(out);//关闭资源out.flush();out.close();excel.close();}public static void main(String[] args) throws Exception {write();}
}

效果展示