一、导入excel：
首先来个区分2003 与2007 版的工具类
public class ExcelImportUtils
{
// @描述：是否是2003的excel，返回true是2003
public static boolean isExcel2003(String filePath) {
return filePath.matches("^.+\\.(?i)(xls)$");
}
//@描述：是否是2007的excel，返回true是2007
public static boolean isExcel2007(String filePath) {
return filePath.matches("^.+\\.(?i)(xlsx)$");
}
/**
* 验证EXCEL文件
* @param filePath
* @return
*/
public static boolean validateExcel(String filePath){
if (filePath == null || !(isExcel2003(filePath) || isExcel2007(filePath))){
return false;
}
return true;
}
}
后台代码
controller层
/**
* 导入会员信息
* @param file
* @return
*/
@RequestMapping("importExcel")
@ResponseBody
public Object importExcel(@RequestParam(value="filename") MultipartFile file){
if(file.isEmpty()){
return ResponseUtil.fail(403, "文件为空！");
}
InputStream is = null;
try
{
is = file.getInputStream();
//获取文件名
String fileName = file.getOriginalFilename();
//根据版本选择创建Workbook的方式
Workbook wb = null;
Sheet sheetAt = null;
//根据文件名判断文件是2003版本还是2007版本
if(ExcelImportUtils.isExcel2007(fileName)){
wb = new XSSFWorkbook(is);
sheetAt = wb.getSheetAt(0);
}else{
wb = new HSSFWorkbook(is);
sheetAt = wb.getSheetAt(0);
}
List userlist = new ArrayList();
//用于密码加密
BCryptPasswordEncoder encoder = new BCryptPasswordEncoder();
//用于生日转换
DateTimeFormatter df = DateTimeFormatter.ofPattern("yyyy-MM-dd");
//double转String
NumberFormat nf = NumberFormat.getInstance();
nf.setGroupingUsed(false);
//false则不分组显示数据, 如：999999999
//true则分组显示数据，即每三位数为一个分组，分组间以英文半角逗号分隔, 如：999,999,999
for (Row row : sheetAt) {
int rowNum = row.getRowNum();
if (rowNum == 0) {
continue;
}
String name = row.getCell(0).getStringCellValue();//用户名
Double phone = row.getCell(1).getNumericCellValue();//手机号
String sex = row.getCell(2).getStringCellValue();//性别
String birthdayStr = row.getCell(3).getStringCellValue();//生日
String level = row.getCell(4).getStringCellValue();//用户等级
/* 判断格式
String qty = "0";
switch (row.getCell(1).getCellType()) {
case HSSFCell.CELL_TYPE_STRING:
qty = row.getCell(1).getRichStringCellValue().getString().trim();
break;
case HSSFCell.CELL_TYPE_NUMERIC:
qty = nf.format(row.getCell(1).getNumericCellValue());
break;
default:
qty = "";
}
*/
//判断是否重复用户名重复
List userList = userService.queryByUsername(name);
if(!userList.isEmpty()){
return ResponseUtil.fail(403, "该用户名重复:"+ name);
}
//数据封装 ，存到数据库
LitemallUser user = new LitemallUser();
user.setUsername(name);
user.setNickname(name);
user.setGender(sex);
user.setUserLevel(level);
user.setAddTime(LocalDateTime.now());
user.setStatus("可用");
user.setMobile(nf.format(phone));
user.setBirthday(LocalDate.parse(birthdayStr, df));
user.setPassword(encoder.encode("123456"));
userlist.add(user);
}
//保存数据到DB
if(userlist.size()>0)
userService.insertBatch(userlist);
}
catch (IOException e)
{
e.printStackTrace();
return ResponseUtil.serious();
}finally {
if (is != null) {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
return ResponseUtil.serious();
}
}
}
return ResponseUtil.ok();
}
pom:
org.apache.poi
poi
3.17
org.apache.poi
poi-ooxml
3.17
最后是测试:
1536032496(1).jpg
使用Postman测试
Postman01.jpg
Postman02.jpg
这边key要和controller 参数名对应
最后debug 可以获取数据
二、导出excel：
简单伪代码：
/**
* 条件导出用户信息
* @param response
* @param user
* @return
*/
@RequestMapping("exportExcel")
@ResponseBody
public Object exportExcel(HttpServletResponse response,User user){
//条件导出
String level = user.getUserLevel();
String status = user.getStatus();
ServletOutputStream outputStream = null;
HSSFWorkbook workbook = null;
try {
// 创建 excel 文件
workbook = new HSSFWorkbook();
// 创建一个标签页
HSSFSheet sheet = workbook.createSheet("用户信息");
//设置列宽
sheet.setColumnWidth(0, 3000);
sheet.setColumnWidth(1, 3000);
sheet.setColumnWidth(2, 3000);
sheet.setColumnWidth(3, 3000);
sheet.setColumnWidth(4, 3000);
sheet.setColumnWidth(5, 3000);
//创建格式
HSSFCellStyle titleStyle = workbook.createCellStyle();
titleStyle.setAlignment(HorizontalAlignment.CENTER);//水平居中
titleStyle.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中
HSSFFont titleFont = workbook.createFont();
titleFont.setBold(true);//粗体
titleFont.setFontHeightInPoints((short)12);//大小
titleFont.setFontName("宋体");//字体类型
titleStyle.setFont(titleFont);
// 创建标题行
HSSFRow titleRow = sheet.createRow(0);
HSSFCell cell0 = titleRow.createCell(0);
cell0.setCellValue("用户名");
cell0.setCellStyle(titleStyle);
HSSFCell cell1 = titleRow.createCell(1);
cell1.setCellValue("手机号");
cell1.setCellStyle(titleStyle);
HSSFCell cell2 = titleRow.createCell(2);
cell2.setCellValue("性别");
cell2.setCellStyle(titleStyle);
HSSFCell cell3 = titleRow.createCell(3);
cell3.setCellValue("生日");
cell3.setCellStyle(titleStyle);
HSSFCell cell4 = titleRow.createCell(4);
cell4.setCellValue("用户等级");
cell4.setCellStyle(titleStyle);
HSSFCell cell5 = titleRow.createCell(5);
cell5.setCellValue("状态");
cell5.setCellStyle(titleStyle);
//DB查询数据
List userList = userService.queryByLevelAndStatus(level, status);
if(userList == null || userList.isEmpty()){
return ResponseUtil.fail(403, "导出数据失败，无用户信息！");
}
// 封装excel数据
DateTimeFormatter df = DateTimeFormatter.ofPattern("yyyy-MM-dd");
for (int i = 0; i < userList.size(); i++) {
titleRow = sheet.createRow(i + 1);
titleRow.createCell(0).setCellValue(userList.get(i).getUsername());
titleRow.createCell(1).setCellValue(userList.get(i).getMobile());
titleRow.createCell(2).setCellValue(userList.get(i).getGender());
titleRow.createCell(4).setCellValue(userList.get(i).getUserLevel());
titleRow.createCell(5).setCellValue(userList.get(i).getStatus());
if(userList.get(i).getBirthday() !=null){
titleRow.createCell(3).setCellValue(df.format(userList.get(i).getBirthday()));
}
}
// 设置两个头 一个输出流
String filename = "会员信息.xls";
outputStream = response.getOutputStream();
// 响应信息，弹出文件下载窗口
response.setContentType("APPLICATION/OCTET-STREAM");
response.setHeader("Content-Disposition", "attachment; filename=" + URLEncoder.encode(filename, "UTF-8"));
workbook.write(outputStream);
} catch (Exception e) {
e.printStackTrace();
return ResponseUtil.fail(403, "导出数据失败！" + e.getMessage());
} finally {
try {
if (outputStream != null) {
workbook.close();
outputStream.close();
}
} catch (Exception e) {
e.printStackTrace();
return ResponseUtil.fail(403, "导出数据失败！" + e.getMessage());
}
}
return ResponseUtil.ok();
}