pom.xml文件写入代码,maven自动加载poi-3.1-beta2.jar
<!-- https://mvnrepository.com/artifact/poi/poi -->
<dependency>
<groupId>poi</groupId>
<artifactId>poi</artifactId>
<version>3.1-beta2</version>
</dependency>
public class DateToExcelUtil {
public static void getExcel(List<User> list){
//第一步:创建一个workbook对应一个Excel文件
HSSFWorkbook workbook=new HSSFWorkbook();
//第二部:在workbook中创建一个sheet对应Excel中的sheet
HSSFSheet sheet=workbook.createSheet("用户表一");
//第三部:在sheet表中添加表头第0行,老版本的poi对sheet的行列有限制
HSSFRow row=sheet.createRow(0);
//第四部:创建单元格,设置表头
HSSFCell cell=row.createCell((short) 0);
cell.setCellValue("用户名");
cell=row.createCell((short) 1);
cell.setCellValue("密码");
//第五部:写入实体数据,实际应用中这些 数据从数据库得到,对象封装数据,集合包对象。对象的属性值对应表的每行的值
for(int i=0;i<list.size();i++){
HSSFRow row1=sheet.createRow(i+1);
User user=list.get(i);
//创建单元格设值
row1.createCell((short)0).setCellValue(user.getUserAccount());
row1.createCell((short)1).setCellValue(user.getPassword());
}
//将文件保存到指定的位置
try {
FileOutputStream fos=new FileOutputStream("G:\user.xls");
workbook.write(fos);
System.out.println("写入成功");
fos.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//测试
public static void main(String[] args) {
User user=new User();
List<User> list=new ArrayList<User>();
user.setUserAccount("admin");
user.setPassword("admin");
list.add(user);
User user1=new User();
user1.setUserAccount("commonuser");
user1.setPassword("123456");
list.add(user1);
getExcel(list);
}
}