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:

     out.println("<td><img src="+user.getPlaceImage()+" width='70' height='50' /></td>");

It is working fine with internet explorer but not working (that is Not displaying image) in chrome/mozilla.

How to display that image in all browsers....

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JDBC :: Storing Images To MySQL Database?

Mar 13, 2015

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.

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I'm going through the next problem:

importing a project from Eclipse into NetBeans, I tried importing project, did not work, anyway

I got all the classes good, but I got a folder with images and a TXT file

part of the code:

listaIconsPlayers[0]=(IconsUtils.makeIcon("imagespinspin_blue.png",dimensaoPinGrande,"pin_blue"));
listaIconsPlayers[1]=(IconsUtils.makeIcon("imagespinspin_green.png",dimensaoPinGrande,"pin_green"));
listaIconsPlayers[2]=(IconsUtils.makeIcon("imagespinspin_purple.png",dimensaoPinGrande,"pin_purple"));
listaIconsPlayers[3]=(IconsUtils.makeIcon("imagespinspin_red.png",dimensaoPinGrande,"pin_red"));
listaIconsPlayers[4]=(IconsUtils.makeIcon("imagespinspin_yellow.png",dimensaoPinGrande,"pin_yellow"));

Where do I place my folder Images and how can I configure this so this lines of code go get that images from a folder inside the project..

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Apr 25, 2014

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");

[Code] .....

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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.

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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 (?,?,?,?,?)";
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JRE :: Storing Images To Remote System Connected Through LAN

Dec 16, 2013

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......?
 
I have used applets to connect to web cam.
 
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.Graphics;

[Code] ....

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.

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May 25, 2012

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 :

+public void contextInitialized(ServletContextEvent sce) {+
+try {+        
C3P0Utils.newInstance().init();
+} catch (PropertyVetoException ex) {+
Logger.getLogger(DatabaseInit.class.getName()).log(Level.SEVERE, null, ex);
+}+
+}+

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.

+public void contextInitialized(ServletContextEvent sce) {+
+try {+
ServletContext ctx=sce.getServletContext();
C3P0Utils.newInstance().init();
ctx.setAttribute("myDataSource", C3P0Utils.newInstance().getDataSource());
+} catch (PropertyVetoException ex) {+
Logger.getLogger(DatabaseInit.class.getName()).log(Level.SEVERE, null, ex);
+}+
+}+

However when I try to red from the context I get nothing. I try to read like this.

+(ComboPooledDataSource)ctx.getAttribute("myDataSource")+

When I print names of all of the attributes in the context I get these attributes.

Context Name

org.apache.tomcat.InstanceManager
org.apache.catalina.jsp_classpath
javax.servlet.context.tempdir
org.apache.catalina.resources
+org.apache.tomcat.JarScanner
+org.apache.jasper.compiler.TldLocationsCache
+org.springframework.web.context.WebApplicationContext.ROOT

Why I can not use anything initialized in the listener.

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Jan 31, 2013

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...

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I need to copy a file from Windows folder to unix folder using Java

I need a FTP utility.

The file is processed by a Java program and the file has to be written to Unix folder

I have the unix server name and folder name.

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Nov 27, 2014

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Using JSP i am able to upload the file into the blob. But icant retrieve or display;

The HTML Tag :

<table style="margin: 0px; margin-top: 15px;">
<tr>
<td id="photo">
<img src="displayimage" />
</td>
</tr>

The Servlet

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Connection conn = null;
Statement stmt = null;
try {
conn = (Connection) DriverManager.getConnection(DB_URL, USER, PASS);
stmt = (Statement) conn.createStatement();
// constructs SQL statement
Class.forName("com.mysql.jdbc.Driver");
Scanner s = new Scanner(System.in);

[code].....

I am not getting the image.

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Mar 10, 2014

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;

[code]....

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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.

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Jul 27, 2014

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.

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JDBC Connectivity With MySQL Database

Apr 24, 2014

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                             
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   // launch the application
   public static void main( String args[] )

[Code] ....

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Feb 7, 2014

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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.

public void insertar(JTable tabla, int rowt, int colt) throws ParseException{
String documento=null, cve_clie=null, fechaE=null, fechaR=null, check=null;
char d=' ',dd=' ',m=' ',mm=' ',y1=' ',y2=' ',y3=' ',y4=' ';
String chck = null;
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Nov 5, 2014

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"
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[Code] ....

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Aug 17, 2014

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.*;
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// JDBC Driver name and database URL
static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
static final String BD_URL = "jdbc:mysql://localhost/sstbde";

[Code] .....

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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>

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Feb 13, 2014

I have created a jsp file which does the simple task of reading data from a mysql database and displaying the results on a web page. Please see below:

<%@ page import="java.io.*,java.util.*,java.sql.*"%>
<%@ page import="javax.servlet.http.*,javax.servlet.*" %>
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[Code] ....

However, each time I run the jsp file in the browser with my localhost as server, I get an HTTP Status 500 error.

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[Code] ....

it displays table every time i will run the server ? gives the data twice and so on

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