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rasanga ratnayake
any one know JSP codes for upload files,download files and delete files from a created virtual memory .
View Answers
June 3, 2011 at 2:52 PM
1)page.jsp:
<%@ page language="java" %> <HTML> <FORM ENCTYPE="multipart/form-data" ACTION="uploadandstore.jsp" METHOD=POST> <center> <table border="0" bgcolor=#ccFDDEE> <tr> <center><td colspan="2" align="center"><B>UPLOAD THE FILE</B><center></td> </tr> <tr><td colspan="2" align="center"> </td></tr> <tr><td><b>Choose the file To Upload:</b></td> <td><INPUT NAME="file" TYPE="file"></td> </tr> <tr><td colspan="2" align="center"> </td></tr> <tr><td colspan="2" align="center"><input type="submit" value="Send File"> </td></tr> <table> </center> </FORM> </HTML>
2)uploadandstore.jsp:
<%@page import="java.io.*, java.sql.*"%>
<%
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;
saveFile="C:/UploadedFiles/"+saveFile;
File f = new File(saveFile);
FileOutputStream fileOut = new FileOutputStream(f);
fileOut.write(dataBytes, startPos, (endPos - startPos));
fileOut.flush();
fileOut.close();
%>
<b>You have successfully upload the file by the name of:</b>
<%
out.println(saveFile);
}
%>
<a href="viewFiles.jsp">View Files</a>
June 3, 2011 at 2:54 PM
3)viewFiles.jsp:
<%@ page import="java.io.*"%>
<html>
<table>
<tr><th>File Name</th><th>View File</th><th>Delete File</th>
<%
File f = new File("C:/UploadedFiles");
File[] files = f.listFiles();
for(int i=0;i<files.length;i++){
String name=files[i].getName();
String path=files[i].getPath();
%>
<tr><td><%=name%></td><td><a href="download.jsp?f=<%=path%>">View</a></td><td><a href="deleteFile.jsp?f=<%=path%>">Delete</a></td></tr>
<%
}
%>
</table>
</html>
4)deleteFile.jsp:
<%@ page import="java.io.*"%>
<%
String file=request.getParameter("f");
File f = new File (file);
f.delete();
response.sendRedirect("viewFiles.jsp");
%>
5)download.jsp:
<%@page import="java.io.*,java.net.*"%>
<%!
public static String getMimeType(String fileUrl)
throws java.io.IOException, MalformedURLException
{
String type = null;
URL u = new URL(fileUrl);
URLConnection uc = null;
uc = u.openConnection();
type = uc.getContentType();
return type;
}
%>
<%
String file=request.getParameter("f");
File f = new File (file);
String filename=f.getName();
String type=getMimeType("file:"+file);
response.setContentType (type);
response.setHeader ("Content-Disposition", "attachment; filename=\""+filename+"\"");
String name = f.getName().substring(f.getName().lastIndexOf("/") + 1,f.getName().length());
InputStream in = new FileInputStream(f);
ServletOutputStream outs = response.getOutputStream();
int bit = 256;
int i = 0;
try {
while ((bit) >= 0) {
bit = in.read();
outs.write(bit);
}
} catch (IOException ioe) {
ioe.printStackTrace(System.out);
}
outs.flush();
outs.close();
in.close();
%>
June 3, 2011 at 6:33 PM
thank u sooooooooooooooo much :)
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