import com.bdqn.demo.model.entity.User;
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.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
* java to excel 導入appache的poi 3.15 jar 包
*/
public class MakeExcelTest {
// 產生要儲存的集合
protected static List<User> getUsers() {
List<User> users = new ArrayList<>();
User user1 = new User("admin", "123456");
User user2 = new User("staff1", "141242");
User user3 = new User("staff2", "386002");
users.add(user1);
users.add(user2);
users.add(user3);
return users;
}
public static void main(String[] args) {
//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);
//第四步,創建單元格,設置表頭
HSSFCell cell = row.createCell(0);
cell.setCellValue("用戶名");
cell = row.createCell(1);
cell.setCellValue("密碼");
//第五步,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
List<User> users = getUsers();
for (int i = 0; i < users.size(); i++) {
HSSFRow row1 = sheet.createRow(i + 1);
User user = users.get(i);
//創建單元格設值
row1.createCell(0).setCellValue(user.getUsername());
row1.createCell(1).setCellValue(user.getPassword());
}
//將文件保存到指定的位置
try {
FileOutputStream fos = new FileOutputStream("E:\\user1.xls");
workbook.write(fos);
System.out.println("寫入成功");
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
原文鏈接:https://blog.csdn.net/endisenchen/article/details/70766947