一、導入excel：
首先來個區分2003 與2007 版的工具類
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)$");
}
//@描述：是否是2007的excel，返回true是2007
public static boolean isExcel2007(String filePath) {
return filePath.matches("^.+\\.(?i)(xlsx)$");
}
/**
* 驗證EXCEL文件
* @param filePath
* @return
*/
public static boolean validateExcel(String filePath){
if (filePath == null || !(isExcel2003(filePath) || isExcel2007(filePath))){
return false;
}
return true;
}
}
后臺代碼
controller層
/**
* 導入會員信息
* @param file
* @return
*/
@RequestMapping("importExcel")
@ResponseBody
public Object importExcel(@RequestParam(value="filename") MultipartFile file){
if(file.isEmpty()){
return ResponseUtil.fail(403, "文件為空！");
}
InputStream is = null;
try
{
is = file.getInputStream();
//獲取文件名
String fileName = file.getOriginalFilename();
//根據版本選擇創建Workbook的方式
Workbook wb = null;
Sheet sheetAt = null;
//根據文件名判斷文件是2003版本還是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<User> userlist = new ArrayList<User>();
//用于密碼加密
BCryptPasswordEncoder encoder = new BCryptPasswordEncoder();
//用于生日轉換
DateTimeFormatter df = DateTimeFormatter.ofPattern("yyyy-MM-dd");
//double轉String
NumberFormat nf = NumberFormat.getInstance();
nf.setGroupingUsed(false);
//false則不分組顯示數據, 如：999999999
//true則分組顯示數據，即每三位數為一個分組，分組間以英文半角逗號分隔, 如：999,999,999
for (Row row : sheetAt) {
int rowNum = row.getRowNum();
if (rowNum == 0) {
continue;
}
String name = row.getCell(0).getStringCellValue();//用戶名
Double phone = row.getCell(1).getNumericCellValue();//手機號
String sex = row.getCell(2).getStringCellValue();//性別
String birthdayStr = row.getCell(3).getStringCellValue();//生日
String level = row.getCell(4).getStringCellValue();//用戶等級
/* 判斷格式
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 = "";
}
*/
//判斷是否重復用戶名重復
List<User> userList = userService.queryByUsername(name);
if(!userList.isEmpty()){
return ResponseUtil.fail(403, "該用戶名重復:"+ name);
}
//數據封裝 ，存到數據庫
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);
}
//保存數據到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:
<!--導入Excel-->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.17</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.17</version>
</dependency>
最后是測試:
1536032496(1).jpg
使用Postman測試
Postman01.jpg
Postman02.jpg
這邊key要和controller 參數名對應
最后debug 可以獲取數據
二、導出excel：
簡單偽代碼：
/**
* 條件導出用戶信息
* @param response
* @param user
* @return
*/
@RequestMapping("exportExcel")
@ResponseBody
public Object exportExcel(HttpServletResponse response,User user){
//條件導出
String level = user.getUserLevel();
String status = user.getStatus();
ServletOutputStream outputStream = null;
HSSFWorkbook workbook = null;
try {
// 創建 excel 文件
workbook = new HSSFWorkbook();
// 創建一個標簽頁
HSSFSheet sheet = workbook.createSheet("用戶信息");
//設置列寬
sheet.setColumnWidth(0, 3000);
sheet.setColumnWidth(1, 3000);
sheet.setColumnWidth(2, 3000);
sheet.setColumnWidth(3, 3000);
sheet.setColumnWidth(4, 3000);
sheet.setColumnWidth(5, 3000);
//創建格式
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);//粗體
titleFont.setFontHeightInPoints((short)12);//大小
titleFont.setFontName("宋體");//字體類型
titleStyle.setFont(titleFont);
// 創建標題行
HSSFRow titleRow = sheet.createRow(0);
HSSFCell cell0 = titleRow.createCell(0);
cell0.setCellValue("用戶名");
cell0.setCellStyle(titleStyle);
HSSFCell cell1 = titleRow.createCell(1);
cell1.setCellValue("手機號");
cell1.setCellStyle(titleStyle);
HSSFCell cell2 = titleRow.createCell(2);
cell2.setCellValue("性別");
cell2.setCellStyle(titleStyle);
HSSFCell cell3 = titleRow.createCell(3);
cell3.setCellValue("生日");
cell3.setCellStyle(titleStyle);
HSSFCell cell4 = titleRow.createCell(4);
cell4.setCellValue("用戶等級");
cell4.setCellStyle(titleStyle);
HSSFCell cell5 = titleRow.createCell(5);
cell5.setCellValue("狀態");
cell5.setCellStyle(titleStyle);
//DB查詢數據
List<User> userList = userService.queryByLevelAndStatus(level, status);
if(userList == null || userList.isEmpty()){
return ResponseUtil.fail(403, "導出數據失敗，無用戶信息！");
}
// 封裝excel數據
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()));
}
}
// 設置兩個頭 一個輸出流
String filename = "會員信息.xls";
outputStream = response.getOutputStream();
// 響應信息，彈出文件下載窗口
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, "導出數據失敗！" + e.getMessage());
} finally {
try {
if (outputStream != null) {
workbook.close();
outputStream.close();
}
} catch (Exception e) {
e.printStackTrace();
return ResponseUtil.fail(403, "導出數據失敗！" + e.getMessage());
}
}
return ResponseUtil.ok();
}
