<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>4.1.2</version>
</dependency>2. 데모 가져오기
2.2 서비스 구현 클래스 레이어
/**
* Excel导入
*/
@PostMapping("/import")
public Result userImport2(@RequestParam("file") MultipartFile file) throws Exception{
Result result=userService.userImportExcel(file);
return result;
}
3 내보내기 데모 port3.1 컨트롤러 레이어
public Result userImportExcel(MultipartFile file){
try {
InputStream inputStream = file.getInputStream();
XSSFWorkbook sheets = new XSSFWorkbook(inputStream);
//获取表单sheet 第一个
XSSFSheet sheetAt = sheets.getSheetAt(0);
//获取第一行
int firstRowNum = sheetAt.getFirstRowNum();
//最后一行
int lastRowNum = sheetAt.getLastRowNum();
//存入数据集合
List<User> users=new ArrayList<>();
//遍历数据
for(int i=firstRowNum+1;i<lastRowNum+1;i++){
XSSFRow row = sheetAt.getRow(i);
if(row!=null){
/* //获取第一行的第一列
int firstCellNum = row.getFirstCellNum();
//获取第一行的最后列
short lastCellNum = row.getLastCellNum();
for (int j=firstCellNum;j<lastCellNum+1;j++){
//放入集合中需要可以用这种方法
String cellValue = getValue(row.getCell(firstCellNum));
}*/
//这里我就直接赋值
User user = new User();
user.setUname(row.getCell(0).getStringCellValue());
user.setUpassword(row.getCell(1).getStringCellValue());
user.setUsex(row.getCell(2).getStringCellValue());
user.setRole(row.getCell(3).getStringCellValue());
user.setUlove((int) row.getCell(4).getNumericCellValue());
user.setUphoto(row.getCell(5).getStringCellValue());
user.setUaddress(row.getCell(6).getStringCellValue());
users.add(user);
}
}
//保存数据
saveBatch(users);
return Result.success();
}catch (Exception e){
e.printStackTrace();
log.info("error:{}",e);
}
return Result.error("300","导入失败");
}
/**
* 判断值的类型
*/
public String getValue(HSSFCell cell) {
if(cell==null){
return "";
}
String cellValue= "";
try {
DecimalFormat df=new DecimalFormat("0.00");
if(cell.getCellType()== CellType.NUMERIC){
//日期时间转换
if(HSSFDateUtil.isCellDateFormatted(cell)){
cellValue=DateFormatUtils.format(cell.getDateCellValue(),"yyyy-MM-dd");
}else{
NumberFormat instance = NumberFormat.getInstance();
cellValue=instance.format(cell.getNumericCellValue()).replace(",","");
}
}else if(cell.getCellType() == CellType.STRING){
//字符串
cellValue=cell.getStringCellValue();
}else if(cell.getCellType() == CellType.BOOLEAN){
//Boolean
cellValue= String.valueOf(cell.getBooleanCellValue());
}else if(cell.getCellType() == CellType.ERROR){
//错误
}else if(cell.getCellType() == CellType.FORMULA){
//转换公式 保留两位
cellValue=df.format(cell.getNumericCellValue());
}else{
cellValue=null;
}
} catch (Exception e) {
e.printStackTrace();
cellValue="-1";
}
return cellValue;
}3.2 서비스 구현 클래스 hutool 도구 클래스 캡슐화 수출 및 가져 오기 엑시시 캡처 2. 데모 가져오기
/**
* 导出
* @param response
* @return
* @throws Exception
*/
@GetMapping("/export")
public Result userExport2(HttpServletResponse response) throws Exception{
Result result=userService.userExportExcel(response);
return result;
}3. 데모 내보내기
public Result userExportExcel(HttpServletResponse response) {
try {
//创建excel
XSSFWorkbook sheets = new XSSFWorkbook();
//创建行
XSSFSheet sheet = sheets.createSheet("用户信息");
//格式设置
XSSFCellStyle cellStyle = sheets.createCellStyle();
//横向居中
cellStyle.setAlignment(HorizontalAlignment.CENTER);
//创建单元格第一列
XSSFRow row = sheet.createRow(0);
//表头
this.titleExcel(row,cellStyle);
//查询全部的用户数据 mybatis-plus
List<User> list = list();
//遍历设置值
for(int i=0;i<list.size();i++){
XSSFRow rows = sheet.createRow(i+1);
User user=list.get(i);
//表格里赋值
this.titleExcelValue(user,rows,cellStyle);
}
//设置浏览器响应格式
response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8");
String filName= URLEncoder.encode("用户信息","UTF-8");
response.setHeader("Content-Disposition","attachment;filename="+filName+".xls");
ServletOutputStream outputStream=response.getOutputStream();
sheets.write(outputStream);
outputStream.close();
sheets.close();
return Result.success();
}catch (Exception e){
e.printStackTrace();
log.info("error:{}",e);
}
return Result.error("300","导出失败");
}
/**
*表格里赋值
**/
public void titleExcelValue(User user, XSSFRow row,XSSFCellStyle cellStyle) {
XSSFCell cellId = row.createCell(0);
cellId.setCellValue(user.getUid());
cellId.setCellStyle(cellStyle);
XSSFCell cellUserName = row.createCell(1);
cellUserName.setCellValue(user.getUname());
cellUserName.setCellStyle(cellStyle);
XSSFCell cellPassword = row.createCell(2);
cellPassword.setCellValue(user.getUpassword());
cellPassword.setCellStyle(cellStyle);
XSSFCell cellSex = row.createCell(3);
cellSex.setCellValue(user.getUsex());
cellSex.setCellStyle(cellStyle);
XSSFCell cellRole = row.createCell(4);
cellRole.setCellValue(user.getRole());
cellRole.setCellStyle(cellStyle);
XSSFCell cellLoveValue = row.createCell(5);
cellLoveValue.setCellValue(user.getRole());
cellLoveValue.setCellStyle(cellStyle);
XSSFCell cellPhone = row.createCell(6);
cellPhone.setCellValue(user.getUphoto());
cellPhone.setCellStyle(cellStyle);
XSSFCell cellAddress = row.createCell(7);
cellAddress.setCellValue(user.getUaddress());
cellAddress.setCellStyle(cellStyle);
}
/**
表头
**/
public void titleExcel(XSSFRow row,XSSFCellStyle cellStyle){
XSSFCell cellId = row.createCell(0);
cellId.setCellValue("用户ID");
cellId.setCellStyle(cellStyle);
XSSFCell cellUserName = row.createCell(1);
cellUserName.setCellValue("用户名");
cellUserName.setCellStyle(cellStyle);
XSSFCell cellPassword = row.createCell(2);
cellPassword.setCellValue("密码");
cellPassword.setCellStyle(cellStyle);
XSSFCell cellSex = row.createCell(3);
cellSex.setCellValue("性别");
cellSex.setCellStyle(cellStyle);
XSSFCell cellRole = row.createCell(4);
cellRole.setCellValue("角色");
cellRole.setCellStyle(cellStyle);
XSSFCell cellLoveValue = row.createCell(5);
cellLoveValue.setCellValue("爱心值");
cellLoveValue.setCellStyle(cellStyle);
XSSFCell cellPhone = row.createCell(6);
cellPhone.setCellValue("电话号码");
cellPhone.setCellStyle(cellStyle);
XSSFCell cellAddress = row.createCell(7);
cellAddress.setCellValue("地址");
cellAddress.setCellStyle(cellStyle);
}위 내용은 POI를 사용하여 Java에서 Excel 테이블을 가져오고 내보내는 방법의 상세 내용입니다. 자세한 내용은 PHP 중국어 웹사이트의 기타 관련 기사를 참조하세요!