servlet file upload
please tell me the complete code to upload a file on localhost using servlet
View Answers
July 22, 2011 at 10:26 AM
1)page.jsp:
<%@ page language="java" %> <HTML> <FORM ENCTYPE="multipart/form-data" ACTION="../UploadServlet" 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)UploadServlet.java:
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
public class UploadServlet extends HttpServlet{
public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
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();
out.println("You have successfully upload the file:"+saveFile);
Connection connection = null;
String connectionURL = "jdbc:mysql://localhost:3306/test";
ResultSet rs = null;
PreparedStatement psmnt = null;
FileInputStream fis;
try{
Class.forName("com.mysql.jdbc.Driver").newInstance();
connection = DriverManager.getConnection(connectionURL, "root", "root");
File f = new File(saveFile);
psmnt = connection.prepareStatement("insert into file(file_data) values(?)");
fis = new FileInputStream(f);
psmnt.setBinaryStream(1, (InputStream)fis, (int)(f.length()));
int s = psmnt.executeUpdate();
if(s>0){
System.out.println("Uploaded successfully !");
}
else{
System.out.println("Error!");
}
}
catch(Exception e){
e.printStackTrace();
}
}
}
}
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