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這期內容當中小編將會給大家帶來有關如何在java中利用poi將Excel數據導入到數據庫中，文章內容豐富且以專業的角度為大家分析和敘述，閱讀完這篇文章希望大家可以有所收獲。
1 先手要制定一個Excel 模板 把模板放入javaWeb工程的某一個目錄下如圖：
<!-- excel 導入小模塊窗口 -->
<div id="importBox" class="" >
<form id="importForm" action="<%=basePath%>book/dishes/backstageversion/list!importExcel" method="post" enctype="multipart/form-data"
class="form-search" onsubmit="loading('正在導入，請稍等...');"><br/>
<input id="uploadFile" name="file" type="file" /><br/><br/>
<input id="btnImportSubmit" class="btn btn-primary" type="submit" value=" 導 入 "/>
<input type="hidden" id="importCompanyId" name="importCompanyId" value=""/>
<input type="hidden" id="importStallId" name="importStallId" value=""/>
<a href="<%=basePath%>book/dishes/backstageversion/list!exportOrder" rel="external nofollow" rel="external nofollow" >下載模板</a>
</form>
</div><!-- excel 導入小模塊窗口 -->
<div id="importBox" class="" >
<form id="importForm" action="<%=basePath%>book/dishes/backstageversion/list!importExcel" method="post" enctype="multipart/form-data"
class="form-search" onsubmit="loading('正在導入，請稍等...');"><br/>
<input id="uploadFile" name="file" type="file" /><br/><br/>
<input id="btnImportSubmit" class="btn btn-primary" type="submit" value=" 導 入 "/>
<input type="hidden" id="importCompanyId" name="importCompanyId" value=""/>
<input type="hidden" id="importStallId" name="importStallId" value=""/>
<a href="<%=basePath%>book/dishes/backstageversion/list!exportOrder" rel="external nofollow" rel="external nofollow" >下載模板</a>
</form>
</div>下面是js
<!-- Bootstrap -->
<link href="<%=path %>/res/admin/css/bootstrap.min.css" rel="external nofollow" rel="stylesheet" type="text/css" />
<link href="<%=path %>/res/admin/css/xy_css.css" rel="external nofollow" rel="stylesheet" type="text/css">
<link href="<%=path %>/res/admin/css/font-awesome.min.css" rel="external nofollow" rel="stylesheet" type="text/css">
<script src="<%=path %>/res/admin/js/jquery.min.js"></script>
<script src="<%=path %>/res/admin/js/bootstrap.min.js"></script>
<link href="<%=path %>/res/admin/jquery-select2/3.4/select2.css" rel="external nofollow" rel="stylesheet" type="text/css" />
<script src="<%=path %>/res/admin/jquery-select2/3.4/select2.min.js"></script>
<script src="<%=path %>/res/admin/jquery-select2/3.4/select2_locale_zh-CN.js"></script>
<script type="text/javascript" src="<%=basePath%>res/admin/js/layer/layer.js"></script>
<script type="text/javascript">
$(document).ready(function (){//加載頁面時執行select2
$("select").select2();
//彈出導出窗口
$("#btnImport").click(function(){
var importStallId = $("#stallId option:selected").val();
var importCompanyId = $("#companyId option:selected").val();
$("#importCompanyId").val(importCompanyId);
$("#importStallId").val(importStallId);
if(importStallId==null || importStallId==""){
alert("請選擇檔口");
}else{
layer.open({
type: 1,
skin: 'layui-layer-rim', //加上邊框
area: ['600px', '350px'], //寬高
content: $('#importBox')
});
}
});
});一：下載模板代碼
/**
* 下載模板
* @throws IOException
*/
public void exportOrder() throws IOException{
HttpServletRequest request = ServletActionContext.getRequest();
HttpServletResponse response = ServletActionContext.getResponse();
File file = null;
InputStream inputStream = null;
ServletOutputStream out = null;
try {
request.setCharacterEncoding("UTF-8");
String realPath = ServletActionContext.getServletContext().getRealPath("/");
file = new File(realPath+"WEB-INF/mailtemplate/dishes.xlsx");
inputStream = new FileInputStream(file);
response.setCharacterEncoding("utf-8");
response.setContentType("application/msexcel");
response.setHeader("content-disposition", "attachment;filename="
+ URLEncoder.encode("菜品導入" + ".xlsx", "UTF-8"));
out = response.getOutputStream();
byte[] buffer = new byte[512]; // 緩沖區
int bytesToRead = -1;
// 通過循環將讀入的Excel文件的內容輸出到瀏覽器中
while ((bytesToRead = inputStream.read(buffer)) != -1) {
out.write(buffer, 0, bytesToRead);
}
out.flush();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (inputStream != null)
inputStream.close();
if (out != null)
out.close();
if (file != null)
file.delete(); // 刪除臨時文件
}
}二： 導入代碼
/**
* 導入
* @throws IOException
*/
public void importExcel() throws IOException {
List<Dishes> dishesList = getDishesList(file);
if(dishesList !=null && dishesList.size()>0){
for(Dishes dishes : dishesList){
targetService.add(dishes);
}
}
String basePath = ServletActionContext.getServletContext().getContextPath();
ServletActionContext.getResponse().sendRedirect(basePath + "/book/dishes/backstageversion/list");
}
/**
* 讀取Excel數據
* @param filePath
* @return List
* @throws IOException
*/
private List<Dishes> getDishesList(String filePath) throws IOException {
XSSFWorkbook workBook= null;
InputStream is = new FileInputStream(filePath);
try {
workBook = new XSSFWorkbook(is);
} catch (Exception e) {
e.printStackTrace();
}
Dishes dishes=null;
List<Dishes> dishesList = new ArrayList<Dishes>();
//循環工作表sheet
//List<XSSFPictureData> picturesList = getPicturesList(workBook);//獲取所有圖片
for(int numShett = 0;numShett<workBook.getNumberOfSheets();numShett++){
XSSFSheet sheet = workBook.getSheetAt(numShett);
//調用獲取圖片 Map<String, PictureData> pictureDataMap = getPictureDataMap(sheet, workBook);
if(sheet==null){
continue;
}
//循環Row
for(int rowNum=1;rowNum<=sheet.getLastRowNum();rowNum++){
Row row = sheet.getRow(rowNum);
if(row==null){
continue;
}
dishes = new Dishes();
//Cell
Cell dishesName = row.getCell(0);
if(dishesName==null){
continue;
}
dishes.setName(getValue(dishesName));//菜品名稱
Cell price = row.getCell(1);
if(price==null){
continue;
}
dishes.setPrice(Double.parseDouble(getValue(price)));//優惠價格
Cell oldPrice = row.getCell(2);
if(oldPrice==null){
continue;
}
dishes.setOldPrice(Double.parseDouble(getValue(oldPrice)));//原價格
Cell summary = row.getCell(3);
if(summary==null){
continue;
}
dishes.setSummary(getValue(summary));//菜品描述
Cell online = row.getCell(4);
if(online==null){
continue;
}
dishes.setOnline(Integer.parseInt(getValue(online)));//是否上下架
Cell packCharge = row.getCell(5);
if(packCharge==null){
continue;
}
dishes.setPackCharge(Double.parseDouble(getValue(packCharge)));//打包費
Cell stockNumber = row.getCell(6);
if(stockNumber==null){//庫存為必填
continue;
}
dishes.setStockNumber(Integer.parseInt(getValue(stockNumber)));//每餐庫存
Cell immediateStock = row.getCell(7);
if(immediateStock==null){//當前庫存
continue;
}
dishes.setImmediateStock(Integer.parseInt(getValue(immediateStock)));//當前庫存
Cell purchaseLimit = row.getCell(8);
if(purchaseLimit==null){
continue;
}
dishes.setPurchaseLimit(Integer.parseInt(getValue(purchaseLimit)));//限購數量
Cell restrictionType = row.getCell(9);
if(restrictionType==null){
continue;
}
dishes.setRestrictionType(Integer.parseInt(getValue(restrictionType)));//限購方式
Cell sort = row.getCell(10);
if(sort==null){
continue;
}
dishes.setSort(Integer.parseInt(getValue(sort)));//排序
Cell contents = row.getCell(11);
if(contents==null){
continue;
}
dishes.setContents(getValue(contents));//菜品詳情
dishes.setCreateTime(new Date());
Company company = companyService.load(importCompanyId);
Stall stall = stallService.load(importStallId);
dishes.setCompany(company);
dishes.setStall(stall);
//set 圖片 PictureData pictureData = pictureDataMap.get(rowNum+""); if(pictureData !=null){ String upImageUrl = UpImage(pictureData.getData()); dishes.setImage(upImageUrl); }
dishesList.add(dishes);
}
}
return dishesList;
}
/**
* 得到Excel表中的值
* @param hssfCell
* @return String
*/
@SuppressWarnings("unused")
private String getValue(Cell cell){
DecimalFormat df = new DecimalFormat("###################.###########");
if(cell.getCellType()==cell.CELL_TYPE_BOOLEAN){
return String.valueOf(cell.getBooleanCellValue());
}
if(cell.getCellType()==cell.CELL_TYPE_NUMERIC){
return String.valueOf(df.format(cell.getNumericCellValue()));
}else{
return String.valueOf(cell.getStringCellValue());
}
}private String file; private Long importCompanyId; private Long importStallId;
public String getFile() {
return file;
}
public void setFile(String file) {
this.file = file;
}
public Long getImportCompanyId() {
return importCompanyId;
}
public void setImportCompanyId(Long importCompanyId) {
this.importCompanyId = importCompanyId;
}
public Long getImportStallId() {
return importStallId;
}
public void setImportStallId(Long importStallId) {
this.importStallId = importStallId;
}公司需求改變要增加導入圖片到又拍云服務器，所以下面增加讀取excel圖片
/**
* 讀取Excel 中圖片
* @param sheet
* @param workBook
* @return
*/
private Map<String, PictureData> getPictureDataMap(XSSFSheet sheet,XSSFWorkbook workBook){
Map<String, PictureData> map = new HashMap<String,PictureData>();
for(POIXMLDocumentPart dr : sheet.getRelations()){
if(dr instanceof XSSFDrawing){
XSSFDrawing drawing = (XSSFDrawing) dr;
List<XSSFShape> shapesList = drawing.getShapes();
if(shapesList !=null && shapesList.size()>0){
for(XSSFShape shape : shapesList){
XSSFPicture pic = (XSSFPicture) shape;
XSSFClientAnchor anchor = pic.getPreferredSize();
CTMarker cTMarker = anchor.getFrom();
String picIndex = cTMarker.getRow()+"";
map.put(picIndex, pic.getPictureData());
}
}
}
}
return map;
}/**
* 上傳圖片到又拍云
* @param bytes
* @return
*/
private String UpImage(byte[] bytes){
String fileName = UUID.randomUUID().toString() + ".jpg";
String uploadURL = UpYunClient.upload(fileName, bytes);
return uploadURL;
}上述就是小編為大家分享的如何在java中利用poi將Excel數據導入到數據庫中了，如果剛好有類似的疑惑，不妨參照上述分析進行理解。如果想知道更多相關知識，歡迎關注億速云行業資訊頻道。
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