package cn.ccaih.read;import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;import java.io.FileOutputStream;
import java.io.IOException;/*** // * 向Excel文件写入数据*/
public class Demo2 {public static void main(String[] args) throws IOException {
//        创建工作簿XSSFWorkbook workbook = new XSSFWorkbook();
//     创建工作表XSSFSheet sheet = workbook.createSheet("工作表一");
//        创建行XSSFRow row = sheet.createRow(0);
//        创建单元格，  传入 =》索引，  valuerow.createCell(0).setCellValue("hello---- word");row.createCell(1).setCellValue("java----");//        创建行XSSFRow row1 = sheet.createRow(1);
//        创建单元格，  传入 =》索引，  valuerow1.createCell(0).setCellValue("hello++++ word");row1.createCell(1).setCellValue("java++++");//       创建输出流，创建excel文件FileOutputStream out = new FileOutputStream("C:\\Users\\黎明\\Desktop\\订单合同\\hello.xlsx");workbook.write(out);}
}

 <dependencies><dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>3.14</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>3.14</version></dependency></dependencies>