透過Java解析Excel檔案
也是一個工作中遇到的情境,很多單位想讓內部人員利用Excel維護資料(因為維護上比較簡單方便),且想讓這份資料透過網頁呈現給一般網友閱讀,所以整體後端的流程應該是:
- 將維護的Excel透過網頁介面上傳
- 將上傳的Excel轉換成XML
- 網頁去讀取這份XML來呈現
透過以上的三個步驟,就可以完成客戶想要效果。
本範例展示的是讀取Excel的XLS格式(新版Excel為XLSX格式),並轉換成陣列的方法(寫入XML在前面的範例就有了),我們選用讀取Excel的Library是Apache POI,而檔內已經有以下的資料,其中Total是公式欄位,計算Price x Quantity:
ID | Name | Price | Quantity | Total |
100001 | 產品名稱1 | 10 | 5 | 50 |
100002 | 產品名稱2 | 20 | 10 | 200 |
100003 | 產品名稱3 | 30 | 15 | 450 |
以下是讀取的程式範例:
package CDIT.stanley; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.Iterator; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.poifs.filesystem.POIFSFileSystem; public class excelToXMLFullSample { static ArrayList<ArrayList<String>> excelData = new ArrayList<ArrayList<String>>(); public static void main (String[] args) throws FileNotFoundException{ excelData.clear(); String xlsPath = "C:\\Projects\\Javas\\sample.xls"; InputStream inputStream = null; inputStream = new FileInputStream (xlsPath); POIFSFileSystem fileSystem = null; try { fileSystem = new POIFSFileSystem (inputStream); @SuppressWarnings("resource") HSSFWorkbook workBook = new HSSFWorkbook (fileSystem); HSSFSheet sheet = workBook.getSheetAt (0); Iterator<?> rows = sheet.rowIterator (); while (rows.hasNext ()){ HSSFRow row = (HSSFRow) rows.next(); Iterator<?> cells = row.cellIterator (); ArrayList<String> rowData = new ArrayList<String>(); while (cells.hasNext ()){ HSSFCell cell = (HSSFCell) cells.next(); switch (cell.getCellTypeEnum()){ case STRING :{ rowData.add(cell.getStringCellValue()); break; } case NUMERIC : { rowData.add((int)cell.getNumericCellValue() + ""); break; } case FORMULA :{ switch(cell.getCachedFormulaResultTypeEnum()) { case STRING: rowData.add(cell.getStringCellValue ()); break; case NUMERIC: rowData.add((int)cell.getNumericCellValue() + ""); break; default: rowData.add(""); break; } } default: rowData.add(""); break; } } excelData.add(rowData); } } catch(IOException e){ System.out.println("IOException " + e.getMessage()); System.out.println("轉換失敗,請檢查Excel檔案與格式是否正確"); } for(int i=0 ; i<excelData.size(); i++){ System.out.println("Excel Row "+ i +" Data : " + excelData.get(i)); } } }
程式會把Excel內的資料轉換為ArrayList,輸出內容如下:
Excel Row 0 Data : [Product ID, Product Name, Product Price, Quantity, Total] Excel Row 1 Data : [100001, 產品名稱1, 10, 5, 50, ] Excel Row 2 Data : [100002, 產品名稱2, 20, 10, 200, ] Excel Row 3 Data : [100003, 產品名稱3, 30, 15, 450, ]
order generic modafinil 200mg provigil buy online
hawgre 7bd55e62be https://en.infinitykey.rocks/profile/Tanu-Weds-Manu-Returns-2015-Hindi-720p-Download-FULL/profile
amiinn 7bd55e62be https://www.rawveganpsychic.com/profile/ralynaolallahralyna/profile
buy modafinil sale
buy stromectol online stromectol price usa stromectol for humans for sale
frahesp 353a2c1c90 https://longkexunetifer.wixsite.com/handcongdispfis/post/stardock-iconpackager-5-10-032-final-full-tested-bamkac
frahesp 353a2c1c90 https://longkexunetifer.wixsite.com/handcongdispfis/post/stardock-iconpackager-5-10-032-final-full-tested-bamkac
frahesp 353a2c1c90 https://longkexunetifer.wixsite.com/handcongdispfis/post/stardock-iconpackager-5-10-032-final-full-tested-bamkac
lavesha 353a2c1c90 https://www.cakeresume.com/portfolios/naresh-technologies-hyderabad-java-material-free-p
keeftre 353a2c1c90 https://www.sport-santementale.fr/profile/raineswaldinecallen/profile
marlfer 353a2c1c90 https://benstrokartroubrap.wixsite.com/afteztaola/post/reallifecam-crack-password-for-26-updated-2022
birtade 353a2c1c90 https://melaninterest.com/pin/blackberry-smart-tool-v1-0-0-1089-louisse-edition-rar/
rhyalea 353a2c1c90 https://www.ac-ctsss.com/profile/andriayousifyousif/profile
innodaya 353a2c1c90 https://ko-fi.com/post/Awarapan-Movie-Hindi-Dubbed-Download-720p-Movie-2-Y8Y5CPVPS
ronnali 353a2c1c90 https://www.jiaido.hu/profile/Control-Systems-Theory-And-Applications-By-Ghosh-Pdf-39-April2022/profile
prescribing stromectol stromectol for humans for sale stromectol for sale
chalin 353a2c1c90 https://www.hepplewhitesinteriors.com/profile/gregorquanikapearlie/profile
guaste 353a2c1c90 https://www.agapelongmont.org/profile/binyaminfynbalah/profile
relophy 353a2c1c90 https://wakelet.com/wake/XVPEJ_CicwpCsEPVuU-as
childael 353a2c1c90 https://www.cakeresume.com/portfolios/food-girls-crack-by-razor1911-download-updated
caelardy 353a2c1c90 https://wakelet.com/wake/sGq_a05KKlDTleKBLPaPu
whytfors 353a2c1c90 https://www.cakeresume.com/portfolios/kareena-kapoor-ki-mast-sundar-gaand-ki-photo-leebe
quaprem 353a2c1c90 https://www.marcusbuffbagwell.com/profile/ellsiewardellneviah/profile
stromectol price usa stromectol 12 mg tablets prescribing stromectol
celmano 353a2c1c90 https://ko-fi.com/post/Lightworks-V11-0-3-Crack-Final-2022-G2G4CPDJM
regonsl 353a2c1c90 https://wakelet.com/wake/kiv10P_2se6oI9UIy8rAz
tamygae 353a2c1c90 https://www.perptable.com/profile/jaemeskalasyalarsson/profile
yanevir 353a2c1c90 https://www.gcpersonaltraining.co.uk/profile/Magic-Objects-For-Archi-Cad-16-Keygen-Latest2022/profile
latagit 353a2c1c90 https://ko-fi.com/post/Windows-7Loader-By-Orbit30-And-Hazar-3264Bit-V1-5-K3K5CPGJU
casihell 353a2c1c90 https://ko-fi.com/post/Gta-sa-mp-keybinder-deanadin-J3J4CPG0S