Springboot+easypoi批量上传下载

直接上代码

pom

 <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-base</artifactId>
            <version>3.0.3</version>
        </dependency>
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-web</artifactId>
            <version>3.0.3</version>
        </dependency>
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-annotation</artifactId>
            <version>3.0.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.9</version>
        </dependency>
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.1</version>
        </dependency>

结果类：

import java.io.Serializable;

public class Result implements Serializable {
    private Integer errno;
    private String[] data;


    public Integer getErrno() {
        return errno;
    }

    public void setErrno(Integer errno) {
        this.errno = errno;
    }

    public String[] getData() {
        return data;
    }

    public void setData(String[] data) {
        this.data = data;
    }
}

工具类

import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

public class ExcelUtil {
    //下载带有表头的空白Excel模板文件
    public static void exportExcel(Class<?> clazz, String fileName, HttpServletResponse response) throws IOException {
        ExportParams exportParams = new ExportParams();
        exportParams.setCreateHeadRows(true);
        defaultExport(new ArrayList<>(), clazz, fileName, response, exportParams);
    }

    public static void exportExcel(List<?> list, String title, String sheetName, Class<?> clazz, String fileName, boolean isCreateHeader, HttpServletResponse response) throws IOException {
        ExportParams exportParams = new ExportParams(title, sheetName);
        exportParams.setCreateHeadRows(isCreateHeader);
        defaultExport(list, clazz, fileName, response, exportParams);
    }

    public static void exportExcel(List<?> list, Class<?> clazz, String fileName, HttpServletResponse response) throws IOException {
        defaultExport(list, clazz, fileName, response, new ExportParams());
    }

    public static void exportExcel(List<?> list, String title, String sheetName, Class<?> clazz, String fileName, HttpServletResponse response) throws IOException {
        defaultExport(list, clazz, fileName, response, new ExportParams(title, sheetName));
    }

    public static void exportExcel(List<Map<String, Object>> list, String fileName, HttpServletResponse response) throws IOException {
        defaultExport(list, fileName, response);
    }

    private static void defaultExport(List<?> list, Class<?> clazz, String fileName, HttpServletResponse response, ExportParams exportParams) throws IOException {
        Workbook workbook = ExcelExportUtil.exportExcel(exportParams, clazz, list);
        if (workbook != null) downLoadExcel(fileName, response, workbook);
    }

    private 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 void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) throws IOException {
        Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
        if (workbook != null) downLoadExcel(fileName, response, workbook);
    }

    public static <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> clazz) {
        if (StringUtils.isBlank(filePath)) {
            return null;
        }
        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        return ExcelImportUtil.importExcel(new File(filePath), clazz, params);
    }

    public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class<T> clazz) throws Exception {
        if (file == null) {
            return null;
        }
        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        return ExcelImportUtil.importExcel(file.getInputStream(), clazz, params);
    }

    //将excel文件内容转换成User集合
    public static List<sysUser> getUserList(MultipartFile file) throws IOException {
        String fileName = file.getOriginalFilename();
        boolean isExcel2003 = true;
        if (fileName.matches("^.+\.(?i)(xlsx)$")) {
            isExcel2003 = false;
        }
        InputStream is = file.getInputStream();
        Workbook wb = isExcel2003 ? new HSSFWorkbook(is) : new XSSFWorkbook(is);
        sysUser user;
        List<sysUser> list = new LinkedList<>();
        int sheetNumber = wb.getNumberOfSheets();
        for (int i = 0; i < sheetNumber; i++) {
            Sheet sheet = wb.getSheetAt(i);
            int rowNumber = sheet.getLastRowNum();
            for (int r = 1; r <= rowNumber; r++) {
                Row row = sheet.getRow(r);
                if (row != null) {
                    String username = getCellValue(row.getCell(0));
                    String password = getCellValue(row.getCell(1));
                    String nickname = getCellValue(row.getCell(2));
                    String headImgUrl = getCellValue(row.getCell(3));
                    String truename = getCellValue(row.getCell(4));
//                    String email = getCellValue(row.getCell(5));
                    Integer status = (int) row.getCell(5).getNumericCellValue();
                    String intro = getCellValue(row.getCell(6));
                    String inTime = getCellValue(row.getCell(7));
                    user = new sysUser(username, password, nickname, headImgUrl, truename,status,intro,inTime);
                    list.add(user);
                }
            }
        }
        return list;
    }

    @SuppressWarnings("deprecation")
    private static String getCellValue(Cell cell) {
        if (cell == null) return null;
        cell.setCellType(Cell.CELL_TYPE_STRING);
        return cell.getStringCellValue();
    }
}

服务层：服务层加入方法

   Result downloadExcelTemplate(HttpServletResponse response);
   Result importExcel(MultipartFile file);
    Result exportExcel(HttpServletResponse response);

实现类：

    /**
     * 批量导入下载excel
     */
    //下载空白的Excel模板文件
    public Result downloadExcelTemplate(HttpServletResponse response) {
        try {
            ExcelUtil.exportExcel(sysUser.class, "用户表.xls", response);
            return Result.getFailedResult("下载成功!");
        } catch (Exception e) {
            logger.log(Level.SEVERE, e.getMessage());
            return Result.getFailedResult("下载失败!");       }   }
    // 导入用户
    public Result importExcel(MultipartFile file) {
        String fileName = file.getOriginalFilename();
        SysRole role = roleMapper.selectByName("ROLE_USER");
        if (!fileName.matches("^.+\.(?i)(xls)$") && !fileName.matches("^.+\.(?i)(xlsx)$")) {
            return Result.getFailedResult("上传文件格式不正确！");      }
        try {
            List<sysUser> users = ExcelUtil.getUserList(file);
//            System.out.println(users);
            for (sysUser user : users) {
                sysUser user0 =userMapper.getUserById(user.getId());
                if (user0 == null) {
                    //密码加密
                    user.setPassword(new BCryptPasswordEncoder().encode(user.getPassword()));
                    userMapper.save(user);
//                    UserInfo userInfo1= new  UserInfo();
//                    userInfo1.setTruename(user.getTruename());
//                    userInfo1.setInTime(user.getInTime());
//                    userInfo1.setUserid(user.getId());
//                    userInfoService.insert(userInfo1);
                }
                if (role !=null){

                    userRoleMapper.add(role.getId(), user.getId());
                }
            }
            return Result.getSuccessResult("导入成功!");
        } catch (Exception e) {
            logger.log(Level.SEVERE, e.getMessage());
            return Result.getFailedResult("导入失败!");    }   }
    // 导出用户
    public Result exportExcel(HttpServletResponse response) {
        try {
            List<sysUser> users = userMapper.queryAll();
            ExcelUtil.exportExcel(users, sysUser.class, "用户.xls", response);
            return Result.getFailedResult("导出成功!");
        } catch (Exception e) {
            logger.log(Level.SEVERE, e.getMessage());
            return Result.getFailedResult("导出失败!");     }  
}

控制层：

/**
     * 下载空白表头
     * @param response
     * @return
     */
    @PreAuthorize("hasPermission('/admin','c')")
    @ResponseBody
    @RequestMapping("/downloadExcelTemplate")
    public Result downloadExcelTemplate(HttpServletResponse response) {
        return userService.downloadExcelTemplate(response);  }
    //导入，即上传
    @ResponseBody
    @RequestMapping("/import")
    public Result importExcel(@RequestParam(value = "filename") MultipartFile file) {
        return userService.importExcel(file);   }
    @PreAuthorize("hasPermission('/admin','c')")
    //导出
    @ResponseBody
    @RequestMapping("/export")
    public Result exportExcel(HttpServletResponse response) {
        return userService.exportExcel(response);    }