<分区>
我是 Apache Poi 和文件处理 java 的新手。所以我需要一些帮助
我在代码中通过 excel 文件路径完成，但现在我想在代码中不提供文件路径。
所以现在我的问题是 如何用jsp浏览mysql数据库表中的文件存储excel的数据？？？
我想通过电脑浏览选择excel文件。
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>
上传.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
感谢您的帮助