如何通过使用jsp在mysql数据库表中浏览文件来存储excel的数据
我是新来的Apache Poi和文件处理java.So我想要一些帮助
我已经通过代码中的Excel文件path完成，但现在我想要在代码中没有给文件path。
所以现在我的问题是如何通过浏览mysql数据库表中的文件使用jsp的Excel中存储数据？
我想通过浏览计算机来selectexcel文件。
的index.jsp
<body> <form action="upload.jsp" method="post" enctype="multipart/form-data"> <table> <tr> <td ><B>UPLOAD THE FILE</B></td> </tr> <tr> <td><b>Choose the file To Upload:</b></td> <td><INPUT NAME="file" TYPE="file"></td> </tr> <tr> <td><input type="submit" value="Upload File"> </td> </tr> </table> </form> </body> upload.jsp
<body> <%@ page import="java.io.*" %> <%@ page import="java.sql.*" %> <%@ page import="java.util.*"%> <%@ page import="org.apache.poi.ss.usermodel.*"%> <%@ page import="org.apache.poi.xssf.usermodel.XSSFSheet"%> <%@ page import="org.apache.poi.xssf.usermodel.XSSFWorkbook"%> <% String saveFile=""; String contentType = request.getContentType(); if ((contentType != null) && (contentType.indexOf("multipart/form-data") >= 0)) { DataInputStream in = new DataInputStream(request.getInputStream()); int formDataLength = request.getContentLength(); byte dataBytes[] = new byte[formDataLength]; int byteRead = 0; int totalBytesRead = 0; while (totalBytesRead < formDataLength) { byteRead = in.read(dataBytes, totalBytesRead,formDataLength); totalBytesRead += byteRead; } String file = new String(dataBytes); saveFile = file.substring(file.indexOf("filename=\"") + 10); saveFile = saveFile.substring(0, saveFile.indexOf("\n")); saveFile = saveFile.substring(saveFile.lastIndexOf("\\") + 1,saveFile.indexOf("\"")); int lastIndex = contentType.lastIndexOf("="); String boundary = contentType.substring(lastIndex + 1,contentType.length()); int pos; pos = file.indexOf("filename=\""); pos = file.indexOf("\n", pos) + 1; pos = file.indexOf("\n", pos) + 1; pos = file.indexOf("\n", pos) + 1; int boundaryLocation = file.indexOf(boundary, pos) - 4; int startPos = ((file.substring(0, pos)).getBytes()).length; int endPos = ((file.substring(0, boundaryLocation)).getBytes()).length; File ff = new File(saveFile); FileOutputStream fileOut = new FileOutputStream(ff); fileOut.write(dataBytes, startPos, (endPos - startPos)); fileOut.flush(); fileOut.close(); %> <table> <tr> <td><b>You have successfully upload the file:</b> <% out.println(saveFile); %> </td> </tr> </table> <% Connection connection = null; ResultSet resultSet = null; PreparedStatement preparedStatement = null; FileInputStream fileInputStream; Statement stmt = null; File f = null; int count = 0; ArrayList<String> mylist = new ArrayList<String>(); try { Class.forName("com.mysql.jdbc.Driver"); connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/parag","root","tiger"); System.out.println("connection sucessfulyyy"); f = new File(saveFile); preparedStatement = connection.prepareStatement("insert into exlogin(username) values(?)"); fileInputStream = new FileInputStream(f); preparedStatement.setBinaryStream(1, (InputStream)fileInputStream, (int)(f.length())); preparedStatement.executeUpdate(); System.out.println("connection sucessfulyyy"); resultSet = stmt.executeQuery("SELECT COUNT(*) FROM exlogin"); while(resultSet.next()) { int val = resultSet.getInt(1); System.out.println(val); count = val+1; } preparedStatement.setInt(1,count); /* We should now load excel objects and loop through the worksheet data */ fileInputStream = new FileInputStream(f); System.out.println("FileInputStream Object created..! "+filePath); /* Load workbook */ XSSFWorkbook workbook = new XSSFWorkbook (fileInputStream); System.out.println("XSSFWorkbook Object created..! "); /* Load worksheet */ XSSFSheet sheet = workbook.getSheetAt(0); System.out.println("XSSFSheet Object created..! "); // we loop through and insert data Iterator<Row> ite = sheet.rowIterator(); System.out.println("Row Iterator invoked..! "); while(ite.hasNext()) { Row row = (Row) ite.next(); Iterator<Cell> cellIterator = row.cellIterator(); int index = 1; while(cellIterator.hasNext()) { Cell cell = cellIterator.next(); switch(cell.getCellType()) { case Cell.CELL_TYPE_STRING: //handle string columns preparedStatement.setString(index, cell.getStringCellValue()); System.out.println("getting cell value..! "+cell.getStringCellValue()); break; case Cell.CELL_TYPE_NUMERIC: //handle double data double i = (double)cell.getNumericCellValue(); preparedStatement.setFloat(index, (float) cell.getNumericCellValue()); break; } index++; } //we can execute the statement before reading the next row preparedStatement.executeUpdate(); } /* Close input stream */ fileInputStream.close(); /* Close prepared statement */ preparedStatement.close(); /* Close connection */ connection.close(); } catch(Exception e) { e.printStackTrace(); } } %> </body>
数据库表
CREATE TABLE exlogin ( username varchar(100) );
Excel文件数据
username parag ram shree tejas jyoti
谢谢你的帮助
InputStream访问运行时你的文件
if(ServletFileUpload.isMultipartContent(request)){ try { List<FileItem> multiparts = new ServletFileUpload(new DiskFileItemFactory()).parseRequest(request); for(FileItem item : multiparts){ if(!item.isFormField()){ InputStream inputStream= item.getInputStream(); Workbook workbook = new XSSFWorkbook(inputStream); } } }catch(Exception e){ e.printStackTrace(); } }
希望对你的帮助！