Java Servlet :: Storing Images In Folder And Their Relative Paths In MySQL Database
Nov 16, 2012
I am developing an web application with servlets and jsp. I have an issue to store images. I am storing images in folder and their relative path's in mysql database.
When I retrieve path from database then using <IMG> tag i have displayed image like:
This question is not about syntax but a best way to handle something. What is the best way to store a image into a database? For example converting it into binary etc. I just wanted to get some opinions.
I can't get Relative paths to work. I have created the class.dat file and I can't get java to recognize it. I am using Eclipse as an IDE. Was wondering if I could get Eclipse to recognize it. I tried with a .txt file as well and couldn't get that to work.
import java.io.*; public class ReadBytes { public static void main(String[] args) { try { FileInputStream file = new FileInputStream("class.dat");
When I assign a classpath-relative URL to an ImageView's 'Image' property, SceneBuilder is unable to display the Image in the Preview. It shows the text "Image not found" instead as a placeholder, which makes sense. What I'd like to do is add a classpath entry to SceneBuilder such that it is able to locate and display the Images. Any way to accomplish this (or similar)?
I am developing my first Java application and the database I use is MySQL. I have created two separate buttons; one to insert new data into my database and the other to update the database when changes are made.
Each button is working perfectly, but I now want to combine both functions into just the save button. Thus, whether I am entering new data or modifying existing data, the save button should use an IF ELSE condition to decide whether to use the INSERT or UPDATE command.
My problem is, how do I write this IF ELSE statement? What should be the condition? For example;
IF(what? ){ String sql ="Insert into Table1 (classID,className,counselorID,startDate,endDate) values (?,?,?,?,?)"; }ELSE{ String sql2 = "update Table1 set classID = '"+value1+"',className='"+value2+"',counselorID='"+value3+"',startDate='"+value4+"',endDate='"+value5+"' where classID = '"+value1+"'"; }
How to store the images captured from a system using web cam(from where the web application accessed) to a folder of system(where the web application is deployed) connected through lan......?
Through this applet I am capturing the image and saving in the application deployed directory and accessing this image through a servlet. Every thing works fine in my system but when i try to capture from other systems connected through lan the image not saving in my system.
I am trying to use a custom listener to initialize database connection pool (C3P0) on start up and then destroy on context shut down. The reason for that is that I whenever context is shutdown I have a memory leak because initialized connection pool is not being destroyed.
I have a static class called C3P0Utils that deals with connection pool. In my listener in contextInitialized method I have tried at first to init the pool like this :
I know that object is created. I checked it using jconsole. However it is not accessible with in the application. My second attempt was to regester the pool and then add it to the context and then when I need it read from there.
I'm creating a web applicaion. for that i want to create a registration page. and this registration details have to be stored in the database.
I'm getting the below error while trying to send the data ...
The requested resource (/cmd/InsertRegtodb) is not available.
Here cmd is project name and InsertRegtodb is servlet name.
Actually the servlet is present is the mentioned address. but it is not connecting to it
There is one more servlet in the same folder and which is accessible from another jsp. But this servlet is not accessible even though i have used same code as it is used for the servlet which worked for me previously...
I've got another project for a course and am stuck. I've debugged and tried to figure out where it is breaking, but I just can't find it. I've used this connection code block as well as the contstructors before, but this just won't work. I've got a tab that should send all of the information to a MySql database upon the click of 'Add Employee'. I've given my connection string, the addEmployee(); code, and if needed I can include the subclass code. I've got a superclass 'Employee' and a subclass 'Salaried' that uses four attributes from 'Employee'.
private void btnAddActionPerformed(java.awt.event.ActionEvent evt) { addEmployee(); } public void addEmployee() { int socialSecurity = 0; boolean error = false;
I am having a problem to connect my .exe file to the database(mysql). I used launch4j to convert the jar file to .exe but the jar file can connect to the database when running inside the dist folder. When I run the .exe I am getting this error: No suitable driver found for jdbc:mysql.
try { is = new FileInputStream(file); data = new byte[(int) file.length()]; is.read(data); String extension = ""; int i = file.getName().lastIndexOf('.'); if(i>0)
[Code] ....
Everything works except transferring the image file.
I created a database in mysql, but I have problems communicating with the DB in java.
Here is the error :
java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/books at java.sql.DriverManager.getConnection(DriverManager.java:604) at java.sql.DriverManager.getConnection(DriverManager.java:221) at displayauthors.DisplayAuthors.main(DisplayAuthors.java:30) java.lang.NullPointerException
[Code] ....
HERE IS THE CODE
public class DisplayAuthors { // database URL static final String DATABASE_URL = "jdbc:mysql://localhost:3306/books"; // launch the application public static void main( String args[] )
I did an application with jframe which i store member personal info like name, surname etc.But when i save it to Mysql database the values are ??????.I have changed database and table and columns collation to utf8, i checked java encoding it's utf-8 but the problem remains.i have spent hours in google search but nothing that works.
i have a problem, im trying to get some values from a jtable (tabla) and insert them in a mysql database, so i scan the table for some values to know which of the rows i must insert ("s" or "n").
I'm able to insert few rows, but when the last row with "s" or "n" is inserted it launch me a NullPointerException and I dont know why.
I m new to programming and am working on the college project. I have MySQL 5.6.20, Eclipse Kepler and Apache Tomcat 7.0.54. I m trying to retrieve the whole table from MySQL schema into a jsp. All the possible things i can do, i have already tried, but none of them are working.
The following attachment contains the whole project. I have my sql connection code in Sample.java file, which i want to get working in Fetch.jsp on the Submit button click. But it shows the tomcat error as localhost:8080/Sample HTTP Status 404-/Sample ; type Status report; message /Sample; Description The requested resource is not available.
<%@ 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">
I am trying to run a simple program that connects to a mysql database and prints out some fields. I am using Eclipse.
THe problem I am having is on the following line of code.
Class.forName("com.mysql.jdbc.Driver");
I get an error:
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method)
[Code] ....
I have done some research and from what I have found is that I need to alter the class path to pick up the driver. When I downloaded the .msi I ran it and then the program closed. Where the files are ??? How to locate and import the file so I need to get my program to run?
I have included all the of the source code below.
package mySQLConnect; import java.sql.*; public class Connect { // JDBC Driver name and database URL static final String JDBC_DRIVER = "com.mysql.jdbc.Driver"; static final String BD_URL = "jdbc:mysql://localhost/sstbde";
I am developing image gallery from images stored in oracle database.
I am using JQuery ColorBox plugin [URL] ..... and I need to specify image in href for plugin.
My JSP page [URL] .... fetch image from database and show.
I can see image in browser when I run [URL] ......
But following not working when JSP page specify in href.
<h2>No Transition + fixed width and height (75% of screen size)</h2>
class="group3" href="http://localhost:8080/gallery/show_image.jsp?id=1">Grouped Photo 1</ a> class="group3" href="http://localhost:8080/gallery/show_image.jsp?id=2">Grouped Photo 2</ a> class="group3" href="http://localhost:8080/gallery/show_image.jsp?id=3">Grouped Photo 3</ a> class="group3" href="http://localhost:8080/gallery/show_image.jsp?id=4">Grouped Photo 1</ a> class="group3" href="http://localhost:8080/gallery/show_image.jsp?id=5">Grouped Photo 2</ a> class="group3" href="http://localhost:8080/gallery/show_image.jsp?id=6">Grouped Photo 3</ a> class="group3" href="http://localhost:8080/gallery/show_image.jsp?id=7">Grouped Photo 3</ a>
