Spring Boot project batch import Excel function

In the previous article, we mentioned the method of parsing doc text documents, so this article mainly talks about if you import in batches through Excel

Requirements introduction:

        In the task module, we can not only add tasks individually, but also add tasks in batches, so we need to use Excel to achieve

Implementation steps:

One, also import POI dependencies

<!-- 引入poi -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.17</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.17</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-scratchpad</artifactId>
            <version>3.17</version>
        </dependency>

Second, the Controller layer

//导入
    @RequestMapping(value = "/activity/upload", method = RequestMethod.POST)
    public Map<String, Object> importExcel(@RequestParam("file") MultipartFile file) throws IOException, Exception{
        Map<String, Object> map = new HashMap<String, Object>();
        try {
            map = groupConfigService.importExcel(file);
            
        } catch (Exception e) {
            map.put("status",-1);
            map.put("data", "导入异常");
        }
        return map;
        
    }

Three, ServiceImpl layer

/**
     * 批量导入（批量添加）
     */
　　　　　　private static final String XLS = "xls";	　　　　　
         　private static final String XLSK = "xlsx";　　//定义全局的常量值

    
    public Map<String, Object> importExcel(MultipartFile file) throws Exception {
        List<TblFixChange> list = new ArrayList<TblFixChange>();
        Map<String, Object> rsultMap = new HashMap<String, Object>();
      
        
        Workbook workbook = null;
        String fileName = file.getOriginalFilename();
        if(fileName.endsWith(XLS)) {
            //2003
            try {
                workbook = new HSSFWorkbook(file.getInputStream());
            } catch (Exception e) {
                e.printStackTrace( );
            }
            
        }else if(fileName.endsWith(XLSK)) {
            try {
                //2007
                workbook = new XSSFWorkbook(file.getInputStream());
            } catch (Exception e) {
                e.printStackTrace( );
            }
        }else {
            throw new Exception("文件不是Excel文件");
        }
        Sheet sheet = workbook.getSheet("Sheet1");
         //指定行数。一共多少+
        int rows = sheet.getLastRowNum();
        if(rows==0) {
            throw new Exception("请填写行数");
        }
        
        for (int i = 1; i < rows+1; i++) {
            //读取左上端单元格
            Row row = sheet.getRow(i);
            //行不为空
            if(row != null) {
                //读取cell
                TblFixChange tblFixChange = new TblFixChange();
                //手机号
                String phone = getCellValue(row.getCell(0));
                tblFixChange.setPreferentialPhone(phone);
                //车牌号
                String catNumber = getCellValue(row.getCell(1));
                tblFixChange.setPreferentialCarNumber(catNumber);
                //组的id
                String groupId = getCellValue(row.getCell(2));
             
              　 tblFixChange.setGroupingId(groupId);
　　　　　　　　　　SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");				　　　　　　　　　　String time = sdf.format(new Date());				　　　　　　　　　　 
                  tblFixChange.setCreateTime(time);				　　　　　　　　　　 
                  tblFixChange.setModifyTime(time);
                list.add(tblFixChange);　　//把实数据放入集合里
            }
        }
        try {
            groupConfigDao.addBatchMembers(list);　　//批量添加 (执行sql语句批量增加)
            rsultMap.put("status", 1);
            rsultMap.put("data", "导入数据成功");
        } catch (Exception e) {
            rsultMap.put("status", -1);
            rsultMap.put("data", "导入数据异常");
        }
        
        return rsultMap;
    }

• getCellValue method: 

//获取Cell内容
    private String getCellValue(Cell cell) {
        String value = "";
        if(cell != null) {
            //以下是判断数据的类型
            switch (cell.getCellType()) {
            case HSSFCell.CELL_TYPE_NUMERIC://数字
                value = cell.getNumericCellValue() + "";
                if(HSSFDateUtil.isCellDateFormatted(cell)) {
                    Date date = cell.getDateCellValue();
                    if(date != null) {
                        value = new SimpleDateFormat("yyyy-MM-dd").format(date);
                    }else {
                        value = "";
                    }
                }else {
                    value = new DecimalFormat("0").format(cell.getNumericCellValue());
                }
                break;
            case HSSFCell.CELL_TYPE_STRING: //字符串
                value = cell.getStringCellValue();
                break;
            case HSSFCell.CELL_TYPE_BOOLEAN: //boolean
                value = cell.getBooleanCellValue() + "";
                break;
            case HSSFCell.CELL_TYPE_FORMULA: //公式
                value = cell.getCellFormula() + "";
                break;
            case HSSFCell.CELL_TYPE_BLANK: //空值
                value = "";
                break;
            case HSSFCell.CELL_TYPE_ERROR: //故障
                value = "非法字符";
                break;
            default:
                value = "未知类型";
                break;
            }
        }
        return value.trim();
    }

Note: If your getCellType cannot be used, it is because of your problem that poi depends on the version. In the new version, getCellType has been deprecated and can be used

getCellTypeEnum 

To replace.

4. Entity content that needs to be imported:

package ********.entity;

import java.io.Serializable;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
/**
 * 批量导入的实体类
 * @author 
 *
 */
@Data
@NoArgsConstructor　　　　
@AllArgsConstructor
public class TblFixChange implements Serializable{

    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    /**手机号**/
    private String preferentialPhone;
    /**车牌号**/
    private String preferentialCarNumber;
    
    /**-- 优惠分组的id --**/
    private String groupingId;

    /**-- 创建时间 --**/
    private String createTime;

    /**-- 修改时间 --**/
    private String modifyTime;


}