pom.xml文件寫入代碼,maven自動加載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:創建一個workbook對應一個Excel文件
HSSFWorkbook workbook=new HSSFWorkbook();
//第二部:在workbook中創建一個sheet對應Excel中的sheet
HSSFSheet sheet=workbook.createSheet("用戶表一");
//第三部:在sheet表中添加表頭第0行,老版本的poi對sheet的行列有限制
HSSFRow row=sheet.createRow(0);
//第四部:創建單元格,設置表頭
HSSFCell cell=row.createCell((short) 0);
cell.setCellValue("用戶名");
cell=row.createCell((short) 1);
cell.setCellValue("密碼");
//第五部:寫入實體數據,實際應用中這些 數據從數據庫得到,對象封裝數據,集合包對象。對象的屬性值對應表的每行的值
for(int i=0;i<list.size();i++){
HSSFRow row1=sheet.createRow(i+1);
User user=list.get(i);
//創建單元格設值
row1.createCell((short)0).setCellValue(user.getUserAccount());
row1.createCell((short)1).setCellValue(user.getPassword());
}
//將文件保存到指定的位置
try {
FileOutputStream fos=new FileOutputStream("G:\\user.xls");
workbook.write(fos);
System.out.println("寫入成功");
fos.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//測試
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);
}
}