import java.sql.*;
import java.io.*;
public class Storeblobfile {
    public static void main(String[] args) {
        
        try{
            
            //Save To DB
            FileInputStream file = new FileInputStream("C:\\shanshui.jpg");
            Class.forName("com.mysql.jdbc.Driver");
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/test?user=root&password=root");
            PreparedStatement ps = conn.prepareStatement("insert into user values(?,?,?)");
            ps.setString(1,"blob");
            ps.setInt(2,23);
            ps.setBinaryStream(3, file, file.available());
            ps.executeUpdate();
            
            //Get Blob
            Statement stmt = conn.createStatement();
            ResultSet rs = stmt.executeQuery("select file from user where name = 'blob'");
            while(rs.next()){
                Blob blob = rs.getBlob(1);
                InputStream in = blob.getBinaryStream();
                
                //Write to File
                FileOutputStream fout = new FileOutputStream("C:\\copy.jpg");
                int b = -1;
                while((b=in.read())!=-1){
                    fout.write(b);
                }
            }
        }catch(Exception e){
            System.out.println(e.getMessage());
        }
    }
}