EasyPoi实现Excel导入导出

EasyPoi实现Excel导入导出️

1.导入依赖

<dependency>
    <groupId>cn.afterturngroupId>
    <artifactId>easypoi-spring-boot-starterartifactId>
    <version>4.4.0version>
dependency>

2.在实体类的字段添加注解

@Data
@EqualsAndHashCode(callSuper = false)
@Accessors(chain = true)
@TableName("mu_tag")
@ApiModel(value = "Tag对象", description = "标签")
public class Tag implements Serializable {

    private static final long serialVersionUID = 1L;

    @ApiModelProperty(value = "主键id")
    @TableId(value = "id", type = IdType.AUTO)
    private Integer id;

    @ApiModelProperty(value = "名称")
    @Excel(name = "名称")
    private String name;

    @ApiModelProperty(value = "创建人")
    @TableField(fill = FieldFill.INSERT)
    @Excel(name = "创建人")
    private String createdBy;

    @ApiModelProperty(value = "创建时间")
    @TableField(fill = FieldFill.INSERT)
    @Excel(name = "创建时间", width = 20, format = "yyyy-MM-dd HH:mm:ss")
    private Date createdTime;

    @ApiModelProperty(value = "更新人")
    @TableField(fill = FieldFill.INSERT_UPDATE)
    @Excel(name = "更新人")
    private String updatedBy;

    @ApiModelProperty(value = "更新时间")
    @TableField(fill = FieldFill.INSERT_UPDATE)
    @Excel(name = "更新时间", width = 20, format = "yyyy-MM-dd HH:mm:ss")
    private Date updatedTime;
}

3.封装工具类

/**
 * Excel导入导出工具类
 *
 * @author xzx
 * @date 2022/10/8
 */
public class ExcelUtil {


    /**
     * 导出Excel
     *
     * @param title     标题
     * @param sheetName sheetName
     * @param beanClass class
     * @param list      集合
     * @param response  response
     * @param        泛型
     */
    static public <T> void export(String title, String sheetName, Class<T> beanClass, List<T> list, HttpServletResponse response) {

        ExportParams params = new ExportParams(title, sheetName, ExcelType.HSSF);
        Workbook workbook = ExcelExportUtil.exportExcel(params, beanClass, list);
        ServletOutputStream out = null;
        try {
            //流形式
            response.setHeader("content-type", "application/octet-stream");
            //防止中文乱码
            response.setHeader("content-disposition",
                    "attachment;filename=" + URLEncoder.encode(title + ".xls", "UTF-8"));
            out = response.getOutputStream();
            workbook.write(out);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                out.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    /**
     * 从Excel中导入数据
     *
     * @param file      文件
     * @param beanClass class
     * @param service   业务层
     * @param        泛型
     * @return responseResult
     */
    static public <T> ResponseResult importExcel(MultipartFile file, Class<T> beanClass, Object service) {
        try {
            List<T> list = getListFromExcel(file, beanClass);
            String methodName = "saveBatch";
            Object success = ReflectUtil.invokeMethodByName(service, methodName, new List[]{list});
            if (BooleanUtil.isTrue(Convert.toBool(success))) {
                return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return ResponseResult.errorResult(AppHttpCodeEnum.SERVER_ERROR);
    }

    /**
     * 获取Excel的实体类集合
     *
     * @param file      文件
     * @param beanClass class
     * @param        泛型
     * @return list
     * @throws Exception
     */
    static public <T> List<T> getListFromExcel(MultipartFile file, Class<T> beanClass) throws Exception {
        ImportParams params = new ImportParams();
        params.setTitleRows(1);
        return ExcelImportUtil.importExcel(file.getInputStream(), beanClass, params);
    }
}