Requirements
1. Servlet APT 3.x.x
Otherwise through exceptions for getPart Method
2. Mysql Connector-5.1.x
Otherwise through exception for setBlob Method instead we use setBinaryStream
Create Three Files and Table in the Database
1. Upload.jsp
2.FileUploadDBServlet.java (servlet File)
3.Message.jsp
1.
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>File Upload to Database Demo
</head>
<body>
<center>
<h1>File Upload to Database Demo
<form method="post" action="FileUploadDBServlet" enctype="multipart/form-data">
<table border="0">
<tr>
<td>Photo: </td>
<td><input type="file" name="photo" size="50"/></td>
</tr>
<tr>
<td colspan="2">
<input type="submit" value="Save">
</td>
</tr>
</table>
</form>
</center>
</body></html>
2. FileUploadDBServlet
//package net.codejava.upload;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.*;
import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;
import javax.servlet.*;
@WebServlet("/uploadServlet")
@MultipartConfig(maxFileSize = 16177215) // upload file's size up to 16MB
public class FileUploadDBServlet extends HttpServlet
{
// database connection settings
private String dbURL = "jdbc:mysql://localhost:3306/imageupload";
private String dbUser = "root";
private String dbPass = "rsb";
protected void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException
{
// // gets values of text fields
// String firstName = request.getParameter("firstName");
// String lastName = request.getParameter("lastName");
InputStream inputStream = null; // input stream of the upload file
// obtains the upload file part in this multipart request
Part filePart = request.getPart("photo");
if (filePart != null) {
// prints out some information for debugging
System.out.println(filePart.getName());
System.out.println(filePart.getSize());
System.out.println(filePart.getContentType());
// obtains input stream of the upload file
inputStream = filePart.getInputStream();
}
Connection conn = null; // connection to the database
String message = null; // message will be sent back to client
try {
// connects to the database
// //DriverManager.registerDriver(new com.mysql.jdbc.Driver());
// Class.forName("com.mysql.jdbc.Driver");
// conn = DriverManager.getConnection(dbURL, dbUser, dbPass);
try{
Class.forName("com.mysql.jdbc.Driver");
}catch(Exception e){System.out.println(e);}
conn=DriverManager.getConnection("jdbc:mysql://localhost/imageupload","root","rsb");
// constructs SQL statement
String sql = "INSERT INTO imageup (imagep) values (?)";
PreparedStatement statement = conn.prepareStatement(sql);
//statement.setString(1, firstName);
//statement.setString(2, lastName);
if (inputStream != null) {
// fetches input stream of the upload file for the blob column
statement.setBinaryStream(1, (InputStream)inputStream,100000);
}
// sends the statement to the database server
int row = statement.executeUpdate();
if (row > 0) {
message = "File uploaded and saved into database";
}
} catch (SQLException ex) {
message = "ERROR: " + ex.getMessage();
ex.printStackTrace();
} finally {
if (conn != null) {
// closes the database connection
try {
conn.close();
} catch (SQLException ex) {
ex.printStackTrace();
}
}
// sets the message in request scope
request.setAttribute("Message", message);
// forwards to the message page
getServletContext().getRequestDispatcher("/Message.jsp").forward(request, response);
}
}
}
3. Message.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Message</title>
</head>
<body>
<center>
<h3><%=request.getAttribute("Message")%></h3>
</center>
</body>
</html>
Table
create table imageup(image longblog);
