标签：springboot excel param fileName pojoClass IOException easypoi throws String

            cn.afterturn
            easypoi-spring-boot-starter
            4.1.0

public enum ExcelTypeEnum {

    XLS("xls"), XLSX("xlsx");

    private String value;

    private ExcelTypeEnum(String value) {
        this.value = value;
    }

    public String getValue() {
        return value;
    }

    public void setValue(String value) {
        this.value = value;
    }
}

@Component
public class ExcelExportUtils {

    @Autowired
    private HttpServletResponse response;

    /**
     * 导出excel
     * @author 溪云阁
     * @param list 泛型数据
     * @param title 标题
     * @param sheetName sheet的名称
     * @param pojoClass 需要导出的对象
     * @param fileName 文件名称
     * @param isCreateHeader 是否创建表头
     * @throws IOException void
     */
    public void exportExcel(List list, Class pojoClass, String title, String sheetName, String fileName,
            boolean isCreateHeader) throws IOException {
        final ExportParams exportParams = new ExportParams(title, sheetName, ExcelType.XSSF);
        exportParams.setCreateHeadRows(isCreateHeader);
        baseExport(list, pojoClass, fileName, exportParams);
    }

    /**
     * 导出excel
     * @author 溪云阁
     * @param list 泛型数据
     * @param title 标题
     * @param sheetName sheet的名称
     * @param pojoClass 需要导出的对象
     * @param fileName 文件名称
     * @param response
     * @throws IOException void
     */
    public void exportExcel(List list, Class pojoClass, String title, String sheetName, String fileName)
            throws IOException {
        baseExport(list, pojoClass, fileName, new ExportParams(title, sheetName, ExcelType.XSSF));
    }

    /**
     * 导出excel
     * @author 溪云阁
     * @param list 泛型数据
     * @param pojoClass 需要导出的对象
     * @param fileName 文件名称
     * @param exportParams 文件书香
     * @param response
     * @throws IOException void
     */
    public void exportExcel(List list, Class pojoClass, String fileName, ExportParams exportParams)
            throws IOException {
        baseExport(list, pojoClass, fileName, exportParams);
    }

    /**
     * 多个sheet导出
     * @author 溪云阁
     * @param list
     * @param fileName
     * @throws IOException void
     */
    public void exportExcel(List> list, String fileName) throws IOException {
        baseExport(list, fileName);
    }

    /**
     * 最基础的对象导出
     * @author 溪云阁
     * @param list 数据列表
     * @param pojoClass 导出对象
     * @param fileName 文件名称
     * @param exportParams 导出文件属性
     * @throws IOException void
     */
    private void baseExport(List list, Class pojoClass, String fileName, ExportParams exportParams)
            throws IOException {
        final Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
        downLoadExcel(fileName, workbook);
    }

    /**
     * 最基础的多sheet导出
     * @author 溪云阁
     * @param list 多个不同数据对象的列表
     * @param fileName 文件名称
     * @throws IOException void
     */
    private void baseExport(List> list, String fileName) throws IOException {
        final Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
        downLoadExcel(fileName, workbook);
    }

    /**
     * 文件下载
     * @author 溪云阁
     * @param fileName 文件名称
     * @param workbook exce对象
     * @throws IOException void
     */
    private void downLoadExcel(String fileName, Workbook workbook) throws IOException {
        ServletOutputStream output = null;
        try {
            final String downloadName = URLEncoder.encode(fileName + "." + ExcelTypeEnum.XLSX.getValue(), "UTF-8");
            response.setCharacterEncoding("UTF-8");
            response.setHeader("content-Type", "application/vnd.ms-excel");
            response.setHeader("Content-Disposition", "attachment;filename=" + downloadName);
            output = response.getOutputStream();
            workbook.write(output);
        }
        catch (final Exception e) {
            throw new IOException(e.getMessage());
        }
        finally {
            if (output != null) {
                output.flush();
                output.close();
            }
        }
    }

}

@Component
public class ExcelImportUtils {

    /**
     * 从指定位置获取文件后进行导入
     * @author 溪云阁
     * @param filePath 文件路径
     * @param titleRows 表格标题行数,默认0
     * @param headerRows 表头行数,默认1
     * @param pojoClass 上传后需要转化的对象
     * @return
     * @throws IOException List
     */
    public  List importExcel(String filePath, Integer titleRows, Integer headerRows, Class pojoClass)
            throws Exception {
        if (Strings.isEmpty(filePath)) {
            return null;
        } else {
            final ImportParams params = new ImportParams();
            // 表格标题行数,默认0
            params.setTitleRows(titleRows);
            // 表头行数,默认1
            params.setHeadRows(headerRows);
            // 是否需要保存上传的Excel
            params.setNeedSave(true);
            // 保存上传的Excel目录
            params.setSaveUrl("/excel/");
            return ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
        }
    }

    /**
     * 上传文件导入
     * @author 溪云阁
     * @param file
     * @param titleRows 标题行
     * @param headerRows 表头行
     * @param needVerfiy 是否检验excel内容
     * @param pojoClass 导入的对象
     * @return
     * @throws Exception List
     */
    public  List importExcel(MultipartFile file, Integer titleRows, Integer headerRows, boolean needVerfiy,
            Class pojoClass) throws Exception {
        if (file == null) {
            return null;
        } else {
            return baseImport(file.getInputStream(), titleRows, headerRows, needVerfiy, pojoClass);
        }

    }

    /**
     * 最基础导入
     * @author 溪云阁
     * @param inputStream
     * @param titleRows 表格标题行数,默认0
     * @param headerRows 表头行数,默认1
     * @param needVerify 是否需要检测excel
     * @param pojoClass 导入的对象
     * @return
     * @throws IOException List
     */
    private  List baseImport(InputStream inputStream, Integer titleRows, Integer headerRows,
            boolean needVerify, Class pojoClass) throws Exception {
        if (inputStream == null) {
            return null;
        } else {
            final ImportParams params = new ImportParams();
            params.setTitleRows(titleRows);
            params.setHeadRows(headerRows);
            params.setSaveUrl("/excel/");
            params.setNeedSave(true);
            params.setNeedVerify(needVerify);
            return ExcelImportUtil.importExcel(inputStream, pojoClass, params);
        }

    }

}

public class User implements Serializable {

    // 数字格式化
    private NumberFormat nf = NumberFormat.getNumberInstance();

    private static final long serialVersionUID = 1L;

    @Excel(name = "用户id", orderNum = "0", width = 15)
    @Setter
    @Getter
    private long userId;

    @Excel(name = "性别", orderNum = "1", width = 15, replace = { "男_1", "女_2" }, suffix = "孩")
    @Setter
    @Getter
    private int sex;

    @Excel(name = "金钱", orderNum = "2", width = 15)
    @Setter
    private double money;

    public String getMoney() {
        return nf.format(money);
    }

    @Excel(name = "用户信息", orderNum = "3", width = 15)
    @Setter
    @Getter
    private String userName;

    @Excel(name = "价格", orderNum = "4", width = 15)
    @Setter
    @Getter
    private float price;

    @Excel(name = "时间", orderNum = "5", width = 15, format = "yyyy-MM-dd")
    @Setter
    @Getter
    private Date now;

}

@Api(tags = { "APP服务：数据接口" })
@RestController
@RequestMapping("view/ie")
public class ImportExportController {

    @Autowired
    private ExcelExportUtils excelExportUtils;

    @Autowired
    private ExcelImportUtils excelImportUtils;

    /**
     * 导出用户信息
     * @author 溪云阁 void
     */
    @ApiOperation(value = "导出excel")
    @GetMapping(value = "/exportExcel")
    public void exportExcel() throws Exception {
        final List userList = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            final User user = new User();
            user.setUserId(i);
            user.setSex(1);
            user.setMoney(12332123 + i);
            user.setUserName("小明" + i);
            user.setPrice(23.1f + i);
            user.setNow(new Date());
            userList.add(user);
        }
        excelExportUtils.exportExcel(userList, User.class, "用户信息", "员工信息的sheet", "用户信息表");
    }

    /**
     * 导入用户信息
     * @author 溪云阁
     * @param file
     * @return
     * @throws IOException Object
     */
    @ApiOperation(value = "导入excel")
    @GetMapping(value = "/importExcel")
    public ResponseMsg> importExcel(@RequestParam("file") MultipartFile file) throws Exception {
        final List userList = excelImportUtils.importExcel(file, 1, 1, false, User.class);
        return MsgUtils.buildSuccessMsg(userList);
    }

}

标签：springboot,excel,param,fileName,pojoClass,IOException,easypoi,throws,String
来源： https://blog.csdn.net/qq_36421955/article/details/111505521

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