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导入easypoi相关jar包,这里的easypoi-base的包也可以不倒入，因为easypoi-web中有依赖easypoi-base会自动导入的
<!-- https://mvnrepository.com/artifact/cn.afterturn/easypoi-base --> <dependency> <groupId>cn.afterturn</groupId> <artifactId>easypoi-base</artifactId> <version>4.2.0</version> </dependency> <!-- https://mvnrepository.com/artifact/cn.afterturn/easypoi-annotation --> <dependency> <groupId>cn.afterturn</groupId> <artifactId>easypoi-annotation</artifactId> <version>4.2.0</version> </dependency> <!-- https://mvnrepository.com/artifact/cn.afterturn/easypoi-web --> <dependency> <groupId>cn.afterturn</groupId> <artifactId>easypoi-web</artifactId> <version>4.2.0</version> </dependency> -
编写导出使用的Javabean，根据具体的需求来定。
//导出实体类的唯一标识 @ExcelTarget("EcCommodityManagementExport") //提供get、set @Data //实现序列化 public class EcCommodityManagementExportVo implements Serializable { private static final long serialVersionUID = 42L; /** * 图片 ，此处做的第一列与第二列的列名合并(只是列名合并)，因为合并之后是第一列的值作为新值填充所以与第二列 * 的name一样 * name 导出时的列名名称 * type 导出类型 1 是文本 2 是图片,3 是函数,10 是数字 默认是文本 * imageType 导出类型 1 从file读取 2 是从数据库中读取 默认是文件 同样导入也是一样的 * numFormat 数字格式化,参数是Pattern,使用的对象是DecimalFormat * replace 值得替换 导出是{a_id,b_id} 导入反过来,所以只用写一个 * databaseFormat 导出时间设置,如果字段是Date类型则不需要设置 数据库如果是string 类型,这个需要设置这个数 * 据库格式 */ @Excel(name = "商品名称（规格描述、单位）" , type = 2 , imageType = 1 , height = 54 , width = 25) private String picUrl; /** * 商品名称 */ @Excel(name = "商品名称（规格描述、单位）" , height = 54 , width = 25) private String productName; /** * 商品编码 */ @Excel(name = "商品编码" , height = 54 , width = 25) private String productCode; /** * 原价 */ @Excel(name = "原价" , height = 54 , width = 25 , numFormat = "0.00") private BigDecimal primeCost; /** * 售价 */ @Excel(name = "售价" , height = 54 , width = 25 , numFormat = "0.00") private BigDecimal price; /** * 库存 */ @Excel(name = "库存" , height = 54 , width = 25) private int repertory; /** * 商品状态(0未提交1已提交2已上架3已下架) */ @Excel(name = "商品状态" , height = 54 , width = 25 , replace = {"未提交_0","已提交_1","已上架_2","已下架_3"}) private int productStatus; /** * 上架时间 */ @Excel(name = "上架时间" , height = 54 , width = 25 , databaseFormat = "yyyy-MM-dd HH:mm:ss" , format = "yyyy-MM-dd HH:mm:ss") private String addedTime; /** * 审核状态(0--1未审核2审核成功3审核失败) */ @Excel(name = "审核状态" , height = 54 , width = 25 , replace = {"--_0","未审核_1","审核成功_2","审核失败_3"}) private int auditStatus; /** * 审核人姓名 */ @Excel(name = "审核人姓名" , height = 54 , width = 25) private String auditUserName; /** * 创建人姓名 */ @Excel(name = "创建人姓名" , height = 54 , width = 25) private String createUserName; /** * 创建时间 */ @Excel(name = "创建时间" , height = 54 , width = 25 , databaseFormat = "yyyy-MM-dd HH:mm:ss" , format = "yyyy-MM-dd HH:mm:ss") private Date createTime; } -
编写导出控制层代码
@ApiOperation(value = "导出" , notes = "导出") @GetMapping("exportProduct") public void exportProduct(@RequestParam("productIdList") List<String> productIdList, HttpServletRequest request, HttpServletResponse response) throws Exception{ ecCommodityManagementService.exportProduct(productIdList,request,response); } -
编写导出业务层代码
/** * 导出 * @param productIdList * @param request * @param response */ @Override public void exportProduct(List<String> productIdList, HttpServletRequest request, HttpServletResponse response) throws Exception{ //如果勾选商品则查询勾选的数据，如没有勾选则查所有商品数据 List<EcCommodityManagementExportVo> ecCommodityManagementList = ecCommodityManagementMapper.findExportData(productIdList); if (ecCommodityManagementList != null && ecCommodityManagementList.size() > 0){ //封装图片数据 for (EcCommodityManagementExportVo ecCommodityManagementExportVo : ecCommodityManagementList) { //导出图片时如果是链接形式要填写全路径 ecCommodityManagementExportVo.setPicUrl(fileUrl + ecCommodityManagementExportVo.getPicUrl()); } } //设置导出文件表头及sheet名 ExportParams exportParams = new ExportParams("商品列表", "商品列表"); //设置导出类型为Excel exportParams.setType(ExcelType.XSSF); //创建数据导出对象 Workbook workbook = ExcelExportUtil.exportExcel(exportParams, EcCommodityManagementExportVo.class, ecCommodityManagementList); //合并单元格new CellRangeAddress(从第几行开始, 到第几行结束, 从第几列开始, 到第几列结束) CellRangeAddress cellAddresses = new CellRangeAddress(1, 1, 0, 1); workbook.getSheetAt(0).addMergedRegion(cellAddresses); //创建导出文件名 String fileName = "商品列表.xlsx"; if (workbook != null){ //让浏览器看的懂我们要干啥 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()); } }注：持久层代码就不贴了
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编写导入使用的Javabean，根据具体的需求来定。
//导入实体类的唯一标识 @ExcelTarget("uploadExcel") //提供get、set @Data //实现序列化 public class UploadExcelVo implements Serializable { //name 对应导入的Excel中的列名，必须一致！ @Excel(name = "题目") private String topic; @Excel(name = "选项A") private String optionA; @Excel(name = "选项B") private String optionB; @Excel(name = "选项C") private String optionC; @Excel(name = "选项D") private String optionD; @Excel(name = "正确答案(多个答案逗号隔开且必须大写)") private String rightAnswers; } -
编写导入控制层代码
@ApiOperation(value = "题目模板导入" , notes = "题目模板导入") @PostMapping("uploadExcel") @ResponseBody public ResultBody uploadExcel(HttpServletRequest request,MultipartFile file){ return sybQuestionBankService.uploadExcel(request,file); } -
编写导入业务层代码
`/** * 题目模板导入 * @param file * @return */ @Override public ResultBody uploadExcel(HttpServletRequest request,MultipartFile file) { //导入数据总条数 int totalNum = 0; //导入成功条数 int cg = 0; try { String bankId = request.getParameter("bankId"); //创建数据导入规则对象 ImportParams importParams = new ImportParams(); //设置第一行为表头不读取 importParams.setHeadRows(1); //验证Excel importParams.setNeedVerify(true); //工具类进行读取直接封装返回值类型UploadExcelVo ExcelImportResult<UploadExcelVo> objectExcelImportResult = ExcelImportUtil.importExcelMore(file.getInputStream(), UploadExcelVo.class, importParams); //遍历读取到的数据 if (objectExcelImportResult.getList() != null && objectExcelImportResult.getList().size() > 0){ totalNum = objectExcelImportResult.getList().size(); SybQuestionBankDetail byQuestionBankIdLimitOne = sybQuestionBankDetailDao.findByQuestionBankIdLimitOne(bankId); int detailSort = 0; if (byQuestionBankIdLimitOne != null && !byQuestionBankIdLimitOne.equals("")){ detailSort = byQuestionBankIdLimitOne.getDetailSort()+1; }else { detailSort = 1; } for (UploadExcelVo uploadExcelVo : objectExcelImportResult.getList()) { //创建题目对象进行存储数据 SybQuestionBankDetail sybQuestionBankDetail = new SybQuestionBankDetail(); sybQuestionBankDetail.setId(UUIDGenerator.getUUID()); sybQuestionBankDetail.setIsDelete(0); sybQuestionBankDetail.setTopic(uploadExcelVo.getTopic()); sybQuestionBankDetail.setQuestionBankId(bankId); sybQuestionBankDetail.setDetailSort(detailSort); sybQuestionBankDetail.setCreateTime(new Date()); //封装题目选项 List<Map<String,Object>> options = new ArrayList<>(); Map<String,Object> mapA = new HashMap<>(); mapA.put("optionKey","A"); mapA.put("optionValue",uploadExcelVo.getOptionA()); options.add(mapA); Map<String,Object> mapB = new HashMap<>(); mapB.put("optionKey","B"); mapB.put("optionValue",uploadExcelVo.getOptionB()); options.add(mapB); if (uploadExcelVo.getOptionC() != null && !uploadExcelVo.getOptionC().equals("")){ Map<String,Object> mapC = new HashMap<>(); mapC.put("optionKey","C"); mapC.put("optionValue",uploadExcelVo.getOptionC()); options.add(mapC); } if (uploadExcelVo.getOptionD() != null && !uploadExcelVo.getOptionD().equals("")){ Map<String,Object> mapD = new HashMap<>(); mapD.put("optionKey","D"); mapD.put("optionValue",uploadExcelVo.getOptionD()); options.add(mapD); } sybQuestionBankDetail.setOptions(JSON.toJSONString(options)); //封装正确答案 String[] split = uploadExcelVo.getRightAnswers().split(",", -1); sybQuestionBankDetail.setRightAnswers(JSON.toJSONString(split)); int insert = sybQuestionBankDetailDao.insert(sybQuestionBankDetail); if (insert > 0){ detailSort++; cg++; } } } } catch (Exception e) { e.printStackTrace(); } return ResultBody.ok().data("应导入"+totalNum+"条题目，导入成功"+cg+"条"); }注：持久层代码就不贴了
以上就是easypoi的导入导出的使用。
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