java 导入excel表格（批量导入），下载excel模板，导出表格
1.导入excel表格（批量导入）
如图，给id=83和id=84的老师导入工作时间。
导入的excel模板如下
注意导入excel表格时关于日期时间类的的数据要设置对应的格式。
后台接口
/**
* 导入老师时间
* @param file
* @param request
* @return
*/
@PostMapping(value = "/import")
public JSONResult importTeacher(@RequestParam(value = "file", required = false) MultipartFile file, HttpServletRequest request) {
JSONResult result = null;
String fileName = file.getOriginalFilename();
try {
if (!fileName.matches("^.+\\.(?i)(xls)$") && !fileName.matches("^.+\\.(?i)(xlsx)$")) {
return new JSONResult(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,"上传文件格式不正确!");
}
teacherService.batchImportTeacherInfo(fileName,file,getCurrentUserId(request));
result = new JSONResult(Constant.APP_RESULT_SUCCESS_NO_DATA, "导入老师时间成功.");
} catch (Exception e) {
e.printStackTrace();
logger.error("addChannelInfo={}", e);
result = new JSONResult(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.getMessage());
}
return result;
}
/**
* 批量导入老师时间
* @param fileName
* @param file
* @param currentUserId
* @throws Exception
*/
@Transactional(readOnly = false, rollbackFor = Exception.class)
public void batchImportTeacherInfo(String fileName, MultipartFile file, Long currentUserId) throws Exception {
List teacherTimeEntities = this.importExcelData(fileName, file, currentUserId);
for (TeacherTimeEntity excelEntity : teacherTimeEntities) {
teacherTimeService.insertSelective(excelEntity);
}
}
/**
* 导入excel数据
* @param fileName
* @param file
* @param userId
* @return
* @throws Exception
*/
public List importExcelData(String fileName, MultipartFile file, Long userId) throws Exception {
boolean isExcel2003 = true;
List channelExcelEntities = new ArrayList();
if (fileName.matches("^.+\\.(?i)(xlsx)$")) {
isExcel2003 = false;
}
InputStream is = file.getInputStream();
Workbook wb = null;
if (isExcel2003) {
wb = new HSSFWorkbook(is);
} else {
wb = new XSSFWorkbook(is);
}
Sheet sheet = wb.getSheetAt(0);
if (sheet == null) {
throw new Exception("sheet不存在，请确认！");
}
TeacherTimeEntity channelExcelEntity;
logger.info("行数" + sheet.getLastRowNum());
for (int r = 1; r <= sheet.getLastRowNum(); r++) {
Row row = sheet.getRow(r);
if (row == null) {
continue;
}
channelExcelEntity = new TeacherTimeEntity();
// 老师名称
row.getCell(0).setCellType(Cell.CELL_TYPE_STRING);
String name = row.getCell(0).getStringCellValue();
// 老师id
String id = null;
row.getCell(1).setCellType(Cell.CELL_TYPE_STRING);
id = row.getCell(1).getStringCellValue();
TeacherEntity teacherEntity = dao.getById(Long.valueOf(id));
if (teacherEntity == null){
throw new Exception("导入失败(第" + (r) + "行,老师ID"+id+"不存在)");
}
DateFormat formater = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
// 开始时间
String startTime = null;
if ( row.getCell(2).getCellType()==0){
if (HSSFDateUtil.isCellDateFormatted(row.getCell(2))){
startTime = formater.format(row.getCell(2).getDateCellValue());
}
}
// 结束时间
String endTime = null;
if ( row.getCell(3).getCellType()==0){
if (HSSFDateUtil.isCellDateFormatted(row.getCell(3))){
endTime = formater.format(row.getCell(3).getDateCellValue());
}
}
channelExcelEntity.setTeacherId(Long.valueOf(id));
channelExcelEntity.setStartTime(formater.parse(startTime));
channelExcelEntity.setEndTime(formater.parse(endTime));
channelExcelEntity.setCreateId(userId);
channelExcelEntity.setCreateTime(new Date());
channelExcelEntities.add(channelExcelEntity);
}
return channelExcelEntities;
}
注意在处理日期类型时要先判断是不是日期类型。
// 开始时间
String startTime = null;
if ( row.getCell(2).getCellType()==0){
if (HSSFDateUtil.isCellDateFormatted(row.getCell(2))){
startTime = formater.format(row.getCell(2).getDateCellValue());
}
}
相关的jar包引入
导入数据库成功
后台框架采用的是antd design，调用后台接口代码如下。
const uploadOption = {
action: `${apiUri}/teacher/import?dir=channel`,
accept:"application/vnd.ms-excel,application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
showUploadList: false,
onChange : this.changeFile,
beforeUpload (file, fileList) {
// 不能大于 1M=1*1024*1024(B) = 1048576
if (file.size > 1048576) {
message.warning("Picture size should not exceed 1M.");
fileList.length = 0;
return false;
}
return true;
}
};
changeFile = ( {file, fileList} ) => {
switch (file.status) {
case 'uploading' : break;
case 'done' :
const {response} = file;
console.info('response',response);
if (response.statusCode === 0) {
message.success('导入成功');
}else {
message.error(response.message);
}
break;
case 'error' : break;
case 'removed' : break;
default : break;
}
};
2.下载excel模板
将需要下载的模板放在项目能直接访问到的文件夹下面。
href里面写能访问到excel模板的项目的路径
3.导出表格
后台接口
/**
* 导出 重点词汇
* @param dto
* @param request
* @param response
*/
@GetMapping("/reportExcel")
public void reportExcel(KeyWordsEntity dto, HttpServletRequest request, HttpServletResponse response) {
SXSSFWorkbook workbook = null;
try {
//开始展开导出操作
List data = keyWordsService.reportExcel(dto);
//内存中保留 1000 条数据，以免内存溢出，其余写入 硬盘
workbook = new SXSSFWorkbook(1000);
String sheetName = "重点词汇";
Sheet sheet = workbook.createSheet(sheetName);
Row row = sheet.createRow(0);
// 标题
String[] headers = {"序号", "单词", "单词中文", "句子", "句子中文"};
//创建单元格格式，并设置居中
CellStyle titleStyle = workbook.createCellStyle();
titleStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER);//居中
//设置字体
Font font = workbook.createFont();
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
titleStyle.setFont(font);
// 设置样式
Cell cell = null;
for (int i = 0; i < headers.length; i++) {//表头部分
cell = row.createCell(i);
cell.setCellValue(headers[i]);
sheet.setDefaultColumnWidth(20);
cell.setCellStyle(titleStyle);
}
CellStyle cellStyle = workbook.createCellStyle();
cellStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER);//居中
for (int i = 0; i < data.size(); i++) {
KeyWordsEntity channelDto = data.get(i);
row = sheet.createRow((i + 1));//创建一行Excel
//序号
cell = row.createCell(0);
cell.setCellValue((i + 1));
cell.setCellStyle(cellStyle);
//单词
cell = row.createCell(1);
cell.setCellValue(channelDto.getWord());
cell.setCellStyle(cellStyle);
// 单词中文
cell = row.createCell(2);
cell.setCellValue(channelDto.getWordChinese());
cell.setCellStyle(cellStyle);
// 句子
cell = row.createCell(3);
cell.setCellValue(channelDto.getSentence());
cell.setCellStyle(cellStyle);
// 句子中文
cell = row.createCell(4);
cell.setCellValue(channelDto.getSentenceChinese());
cell.setCellStyle(cellStyle);
}
response.setCharacterEncoding("UTF-8");
response.setContentType("application/ms-excel; charset=UTF-8");
String filename = "重点词汇.xlsx";
response.setHeader("Content-Disposition", "attachment;filename=" + new String(filename.getBytes("UTF-8"), "iso-8859-1")); // 设置文件的名称
workbook.write(response.getOutputStream());
} catch (Exception e) {
e.printStackTrace();
} finally {
workbook.dispose();
}
}
org.apache.poi
poi-ooxml
3.10.1
前端：react + Ant.design
页面
report = () => {
const { dispatch, form } = this.props;
const parms = qs.parse(window.location.search);
const id = parseInt(parms.id, 10);
form.validateFields((err, fieldsValue) => {
const values = {
cellId: id,
...fieldsValue,
};
dispatch({
type: 'course/reportExcel',
payload: values,
});
});
};
model
*reportExcel({ payload }, { call }) {
yield call(reportExcel, payload);
},
service
export async function reportExcel(params) {
window.open(`${apiUri}/course/reportExcel?${stringify(params)}`);
}