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easypoi 导入与导出

一、接口类

   /**
     * 导入人员列表
     */
    @PostMapping("/workSheet/upload")
    public void importExcel(@RequestParam("file") MultipartFile file, HttpServletResponse response) throws Exception {
        String fileName = file.getOriginalFilename();
        boolean fileIsExcel = Objects.requireNonNull(fileName).matches("^.+\\.(?i)(xls)$") || fileName.matches("^.+\\.(?i)(xlsx)$");
        if (!fileIsExcel) {
            throw  new GlobalException(400,"文件格式错误");
        }
        InputStream inputStream = file.getInputStream();
        ImportParams importParams = new ImportParams();

        // 需要验证
        importParams.setNeedVerfiy(true);
        ExcelImportResult<ImUsersPO> requestList = ExcelImportUtil.importExcelMore(inputStream, ImUsersPO.class, importParams);
        List<ImUsersPO> list = requestList.getList();
        list.forEach(o->{
            if(null != o){
            	//保存到数据库
                baseUserService.addUser(o);
            }

        });

        //判断是否有错误
        if(requestList.isVerfiyFail()){
            //getFailList()里面的就是所有校验失败的excel数据
            List<ImUsersPO> failList = requestList.getFailList();
            System.out.println(failList);
            ExportParams params = new ExportParams();
            params.setSheetName("工单批量导入错误数据");
            Workbook workbook = ExcelExportUtil.exportExcel(params, ImUsersPO.class, failList);
            EasypoiUtil.downLoadExcel("workSheet_error.xls", response, workbook);
        }
    }
   /**
     * 导出人员列表
     */
    @RequestMapping(value = "/downLoadExcel", method = RequestMethod.GET)
    @ResponseBody
    public void downLoadExcel( HttpServletResponse response) {
        try {
            String title = "人员表"; //标题名
            String sheetName = "人员表"; //表名
            //需要导出的数据
            List<UserBaseInfoDTO> userBaseInfoDTOS = baseUserService.loadAllUserList();
            ExcelUtils.exportExcel(userBaseInfoDTOS, title, sheetName, UserBaseInfoDTO.class,  String.valueOf(System.currentTimeMillis()), response);
        } catch (Exception e) {
            throw  new GlobalException(400,"导出失败");
        }
    }

二、工具类

/**
 *  Excel导入导出工具类
 */
public class ExcelUtils {
    private static Logger logger = LoggerFactory.getLogger(ExcelUtils.class);
    /**
     * excel 导出
     *
     * @param list     数据列表
     * @param fileName 导出时的excel名称
     * @param response
     */
    public static void exportExcel(List<Map<String, Object>> list, String fileName, HttpServletResponse response) throws IOException {
        defaultExport(list, fileName, response);
    }

    /**
     * 默认的 excel 导出
     *
     * @param list     数据列表
     * @param fileName 导出时的excel名称
     * @param response
     */
    private static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) throws IOException {
        //把数据添加到excel表格中
        Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
        downLoadExcel(fileName, response, workbook);
    }

    /**
     * excel 导出
     *
     * @param list         数据列表
     * @param pojoClass    pojo类型
     * @param fileName     导出时的excel名称
     * @param response
     * @param exportParams 导出参数（标题、sheet名称、是否创建表头，表格类型）
     */
    private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response, ExportParams exportParams) throws IOException {
        //把数据添加到excel表格中
        Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
        downLoadExcel(fileName, response, workbook);
    }

    /**
     * excel 导出
     *
     * @param list         数据列表
     * @param pojoClass    pojo类型
     * @param fileName     导出时的excel名称
     * @param exportParams 导出参数（标题、sheet名称、是否创建表头，表格类型）
     * @param response
     */
    public static void exportExcel(List<?> list, Class<?> pojoClass, String fileName, ExportParams exportParams, HttpServletResponse response) throws IOException {
        defaultExport(list, pojoClass, fileName, response, exportParams);
    }

    /**
     * excel 导出
     *
     * @param list      数据列表
     * @param title     表格内数据标题
     * @param sheetName sheet名称
     * @param pojoClass pojo类型
     * @param fileName  导出时的excel名称
     * @param response
     */
    public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName, HttpServletResponse response) throws IOException {
        defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName, ExcelType.XSSF));
    }



    /**
     * excel 导出
     *
     * @param list           数据列表
     * @param title          表格内数据标题
     * @param sheetName      sheet名称
     * @param pojoClass      pojo类型
     * @param fileName       导出时的excel名称
     * @param isCreateHeader 是否创建表头
     * @param response
     */
    public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName, boolean isCreateHeader, HttpServletResponse response) throws IOException {
        ExportParams exportParams = new ExportParams(title, sheetName, ExcelType.XSSF);
        exportParams.setCreateHeadRows(isCreateHeader);
        defaultExport(list, pojoClass, fileName, response, exportParams);
    }


    /**
     * excel下载
     *
     * @param fileName 下载时的文件名称
     * @param response
     * @param workbook excel数据
     */
    private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) throws IOException {
        try {
            response.setCharacterEncoding("UTF-8");
            response.setHeader("content-Type", "application/vnd.ms-excel");
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName + ".xlsx", "UTF-8"));
            workbook.write(response.getOutputStream());
        } catch (Exception e) {
            throw new IOException(e.getMessage());
        }
    }



    /**
     * excel 导入
     *
     * @param file      excel文件
     * @param pojoClass pojo类型
     * @param <T>
     * @return
     */
    public static <T> List<T> importExcel(MultipartFile file, Class<T> pojoClass) throws IOException {
        return importExcel(file, 1, 1, pojoClass);
    }

    /**
     * excel 导入
     *
     * @param filePath   excel文件路径
     * @param titleRows  表格内数据标题行
     * @param headerRows 表头行
     * @param pojoClass  pojo类型
     * @param <T>
     * @return
     */
    public static <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> pojoClass) throws IOException {
        if (StringUtils.isBlank(filePath)) {
            return null;
        }
        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        params.setNeedSave(true);
        params.setSaveUrl("/excel/");
        try {
            return ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
        } catch (NoSuchElementException e) {
            throw new IOException("模板不能为空");
        } catch (Exception e) {
            throw new IOException(e.getMessage());
        }
    }


    /**
     * excel 导入
     *
     * @param file       上传的文件
     * @param titleRows  表格内数据标题行
     * @param headerRows 表头行
     * @param pojoClass  pojo类型
     * @param <T>
     * @return
     */
    public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class<T> pojoClass) throws IOException {
        if (file == null) {
            return null;
        }
        try {
            return importExcel(file.getInputStream(), titleRows, headerRows, pojoClass);
        } catch (Exception e) {
            throw new IOException(e.getMessage());
        }
    }

    /**
     * excel 导入
     *
     * @param inputStream 文件输入流
     * @param titleRows   表格内数据标题行
     * @param headerRows  表头行
     * @param pojoClass   pojo类型
     * @param <T>
     * @return
     */
    public static <T> List<T> importExcel(InputStream inputStream, Integer titleRows, Integer headerRows, Class<T> pojoClass) throws IOException {
        if (inputStream == null) {
            return null;
        }
        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        params.setSaveUrl("/excel/");
        params.setNeedSave(true);
        try {
            return ExcelImportUtil.importExcel(inputStream, pojoClass, params);
        } catch (NoSuchElementException e) {
            throw new IOException("excel文件不能为空");
        } catch (Exception e) {
            throw new IOException(e.getMessage());
        }
    }

}

public class EasypoiUtil {
    public EasypoiUtil() {
    }

    public static void templateExport(TemplateExportParams templateExcel, Map<String, Object> dataMap, String fileName, HttpServletResponse response) throws IOException {
        Workbook workbook = ExcelExportUtil.exportExcel(templateExcel, dataMap);
        if (workbook != null) {
            downLoadExcel(fileName, response, workbook);
        }

    }

    public static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) throws IOException {
        response.setCharacterEncoding("UTF-8");
        response.setHeader("content-Type", "application/vnd.ms-excel");
        response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
        workbook.write(response.getOutputStream());
    }

    private static String filename(HttpServletRequest request, String filename) throws Exception {
        String userAgent = request.getHeader("User-Agent");
        if (!userAgent.contains("MSIE") && !userAgent.contains("Trident")) {
            filename = new String(filename.getBytes("UTF-8"), "ISO-8859-1");
        } else {
            filename = URLEncoder.encode(filename, "UTF-8");
        }

        return filename;
    }
}

三、实体类

@Builder
@Data
@EqualsAndHashCode(callSuper = false)
@Accessors(chain = true)
@TableName("im_users")
@NoArgsConstructor
@AllArgsConstructor
public class ImUsersPO extends Model<ImUsersPO> {

    private static final long serialVersionUID = 1L;

    @TableId(value = "id", type = IdType.AUTO)
    private Long id;

    /**
     * 头像地址
     */
    @TableField("avatar_url")
    private String avatarUrl;


   
    /**
     * 家庭住址
     */
    @TableField("family_address")
    private String familyAddress;


    /**
     * 昵称
     */
    @TableField("nickname")
    @Excel(name = "姓名")
    private String nickname;

    /**
     * 密码
     */
    @TableField("password")
    private String password;

    /**
     * 性别 1男 2女
     */
    @TableField("u_sex")
    @Excel(name = "性别",replace = {"男_1", "女_2"})
//    @Pattern(regexp = "[12]", message = "性别错误")
    private String usex;

    @TableField("update_time")
    private LocalDateTime updateTime;

    /**
     * 用户名
     */
    @TableField("username")
    private String username;

    /**
     * 手机号
     */
    @TableField("phone_number")
    @Excel(name = "联系方式")
    private String phoneNumber;

    



    /**
     * 职位
     */
    @TableField("position")
    @Excel(name = "职务")
    private String position;



    /**
     * 状态 是否可用 0可用 1不可用
     */
    @TableField("status")
    private Long status;


    @Override
    protected Serializable pkVal() {
        return this.id;
    }

}