How to save your position in a JSP page on submit
I am building a web application based on JSP pages and servlets. One of the JSP pages is larger than the screen, so i have to scroll down. On the lower part of the page, i have a control that submits a form to a servlet that performs some logic and then returns to the same JSP page. When the JSP page is redisplayed, it is positioned at its top position again. I would like to save my positioning on the page and return to the exact same scroll position. How is this easiest done?
Just use an onclick or onsubmit event to get the current scroll position using JS and send it along the request to the server side and let it set the value in an onload event of the page which comes with the response.
I am not going to give you JS+DOM codes here. Just learn it and if necessary ask help at the appropriate forum. There are JS and DOM tutorials at w3schools.com and there are clientside development forums at webdeveloper.com and dynamicdrive.com.
Similar Messages
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"I need to erase the contents of my phone and restore to factory settings. Does anybody know how to save your texts so you don't lose them? Can I back those up to iCloud? My phone was very likely hacked (Apple's advice was to call the police!)"
That was all I could put in the initial "box." Then it brought me to this page with instructions on how to write a good sentence.
Proceeding ...
After going back and forth between Apple, AT&T and the police (all telling me to go to the other two) I took AT&Ts suggestion and got a new number. One tech warned against doing a backup, especially on my Mac, saying if my phone had been hacked then whatever bug was there would then invade my computer. But nobody knows how to determine if the phone has been hacked or a virus was planted there. Unfortunately I know who would have reason to do such a thing and all I can say is that he is at the top technologically and could easily do it. Almost impossible to prove, however.
So I need to preserve my text messages and my emails as well. I backed up my photos to that Microsoft product (One-Drive) and it froze (Surprise, Surprise) with four short videos to go, and no way of stopping that (when I tried it crashed repeatedly) so I'm in crisis mode here.
Help ...
Running 8.0 on 5S
Thanks!Betty I don't know if you fixed your hacking problem but I feel your pain. I've seen some strange things going on between my iMac and my iPhone and Apple has told me the same thing, call the police which I have done. The hackers have stole 500.00 out of my checking account have access to every internet account I use and no matter how often I change the password their right back on the account. I closed my FB account 3 times only to have someone reopen it. Right now I've got a link in my reading list (Safari) that if I click on it, it allows me to log onto my FB account anonymously.
I've seen a green folder come out of no where while I was trying to delete my passwords out of keychain when that green folder was put into the key chain I was immediately locked out. I than went into system preferences to try to make changes to my security settings, when I clicked on the icon it wouldn't open. I've seen log files of automator receiving commands and sending out my personal information thats on my computer.
I have a legitamate program called iExplorer that allows you to look at the contents of your iPhone back ups and saw a transaction someone made at the Apple store for some full length movies, some albums, ibooks and other apps but when I called the iTunes store and they said none of those items were showing up on my account. If their not on my account how can they be on my iPhone 6? One day someone was using my gmail account and unknowingly used google maps to search for an Italian restaurant, than a Mexican restaurant than a coffee shop and their search showed up on my iPhone but I didn't have my gmail account installed on my iPhone 6. Using my computer I logged onto my gmail account and looked at the maps history and sure enough there were the searches when I'd hover my curser over the link it gave me the longitude and latitude of the where the hacker was when he was using google maps. I know whoever reads this thinks Im crazy but I've documented everything and can prove the things that I have mentioned in this post actually happened.
One day I had my laptop (pc) and my iMac next to each other as I was using both. when I clicked on airport it showed that my laptop and my iMac had made a connection and were actually communicating with each other. I know I didn't do it I don't know how. The iMac was logged into my iCloud account while my laptop wasn't. I have formatted my iPhone at least a dozen times, Apple and an Apple retailer have formatted my hard drive not to mention the numerous times I have formatted it but the hackers keep getting on my devices. Im formatting my lap top at this very second because during the course of the night I left the ethernet cable plugged into it and they locked me out of my c: drive, and configured the system so I can't download any updates from Microsoft, overtime I type in www.microsoft.com it changes to ww38.microsoft.com which takes me to a blank page. I right clicked on the page I was redirected to and read the java script and couldn't believe that someone had actually configured Internet Explorer to redirect me to a blank page when I tried to go to Microsoft. Apples answer to all this is there was nothing wrong with my iPhone or my iMac and if I thought there was a problem to call the police which I have done.
Theres no doubt the hackers are reading this while I type it or will read it and I simply don't care anymore. I no longer email anyone, don't use my iCloud account and have taken precautions to protect my credit but if I ever find out who has invaded my privacy to this extreme the police are going to want to talk to me because Im going to hurt them like they've never been hurt before -
How to save your website without..
I was wondering how to save your data to be always available, without using Muse. I mean after the trail period or month subscription ends, that you still can open or upload it without Muse. Like that you have an backup.
As RoyaltyTech pointed out - yes, you can File>ExportHTML to have the HTML, CSS and image files all brought together in one place and upload them without an subscription or after the trial period is over.
However, as a precauction, as you mentioned "without using Muse" and "still can open...it without Muse" I thought it would be prudent to point out that WITHOUT the orginal artwork / .muse file and the Muse software, you will not be able to open and edit your site later on without a current subscription. -
How to save content of a whole swing page
Hi everyone ..
can any of u tell me ,how to save contents of a java swing page in a single file with all components viz . textfield,textarea,JTable,JPanel etc .. with their respective formatting ie.e Font,Color etc ..
Plz let me know it soon .. its very urgent ..
Can I save it as Screenshot or Jpeg Image .. or how to go about it .
MohitSure: see below!
WARNING: this code will not compile as is because it uses some other classes from my personal code library (FileUtil & StringUtil). The particular methods of those classes which are used below are trivial methods that anyone can write, which is is why I have not posted them as well. So, to get the code below to compile, you can
a) write your own versions of these classes or
b) simply add the necessary methods to this class or
c) simply comment out their usage (in the case of StringUtil, which is just used for arg checking)
But if you still want me to post them, then I can post the relevant fragments of those classes.
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.io.*;
import javax.imageio.*;
import javax.swing.*;
import bb.io.FileUtil;
import bb.util.StringUtil;
* Class which supports taking screen shots of the entire desktop, AWT Components, or Swing JComponents.
* This functionality is implemented in a series of <code>take</code> methods, each of which returns a BufferedImage.
* This class also offers convenience <code>write</code> methods for storing BufferedImages to files.
* <p>
* The images taken by this class should be the precise images seen on the screen.
* <b>However, the images written to files may deviate from the originals.</b>
* One obvious cause is limitations of the chosen file format (especially with lossy formats like jpeg).
* A subtle issue can occur, however, even when using lossless formats like png:
* if the file is subsequently opened by another application,
* that application may rescale the image, which can often cause visible artifacts.
* <blockquote>
* To see this last problem on Windows XP,
* call {@link #take()} which returns an image of the entire desktop and write it to a file,
* and then open the file with XP's default graphics file viewer ("Windows Picture And Fax Viewer").
* This program shrinks the desktop image in order to fit it inside the program's window,
* and rescaling artifacts are readily seen, especially if the desktop image has any kind of text in it.
* If "Windows Picture And Fax Viewer" instead cropped the image or had a scroll pane, then this should not happen.
* </blockquote>
* <p>
* Acknowledgement: this class was inspired by the program
* <a href="http://www.discoverteenergy.com/files/ScreenImage.java">ScreenImage</a>.
* Differences from the above program:
* <ol>
* <li>this class uses {@link BufferedImage#TYPE_INT_ARGB} instead of {@link BufferedImage#TYPE_INT_RGB} in order to preserve alpha</li>
* <li>this class's {@link #formatNameDefault default image file format} is PNG instead of JPEG</li>
* <li>this class's <code>take</code> methods simply take snapshots and never have the side effect of writing image files</li>
* <li>this class added a version of <code>take</code> which can get a snapshot of a region of a Component</li>
* <li>
* when taking a snapshot of a region of a Component or JComponent,
* the Rectangle that specifies the region always has coordinates relative to the origin of the item
* </li>
* </ol>
* See also:
* <a href="http://forum.java.sun.com/thread.jspa?forumID=57&threadID=597936">forum discussion #1 on screen shots</a>
* <a href="http://forum.java.sun.com/thread.jspa?forumID=256&threadID=529933">forum discussion #2 on screen shots</a>
* <a href="http://forum.java.sun.com/thread.jspa?forumID=57&threadID=622393">forum discussion #3 on screen shots</a>.
* <p>
* It might appear that this class is multithread safe
* because it is immutable (both its immediate state, as well as the deep state of its fields).
* However, typical Java gui code is not multithread safe, in particular, once a component has been realized
* it should only be accessed by the event dispatch thread
* (see <a href="http://java.sun.com/developer/JDCTechTips/2003/tt1208.html#1">Multithreading In Swing</a>
* and <a href="http://java.sun.com/developer/JDCTechTips/2004/tt0611.html#1">More Multithreading In Swing</a>).
* So, in order to enforce that requirement, all methods of this class which deal with components
* require the calling thread to be the event dispatch thread.
* See the javadocs of each method for its thread requirements.
* <p>
* @author bbatman
public class ScreenShot {
// -------------------- constants --------------------
* Defines the image type for the BufferedImages that will create when taking snapshots.
* The current value is {@link BufferedImage#TYPE_INT_ARGB}, which was chosen because
* <ol>
* <li>the 'A' in its name means that it preserves any alpha in the image (cannot use the "non-A" types)</li>
* <li>the "_INT" types are the fastest types (the "BYTE" types are slower)
* </ol>
* @see <a href="http://forum.java.sun.com/thread.jspa?threadID=709109&tstart=0">this forum posting</a>
private static final int imageType = BufferedImage.TYPE_INT_ARGB;
* Default value for the graphics file format that will be written by this class.
* The current value is "png" because the PNG format is by far the best lossless format currently available.
* Furthermore, java cannot write to GIF anyways (only read).
* <p>
* @see <a href="http://www.w3.org/TR/PNG/">Portable Network Graphics (PNG) Specification (Second Edition)</a>
* @see <a href="http://www.w3.org/QA/Tips/png-gif">GIF or PNG</a>
* @see <a href="http://www.libpng.org/pub/png/">PNG Home Site</a>
public static final String formatNameDefault = "png";
// -------------------- take --------------------
// desktop versions:
* Takes a screen shot of the entire desktop.
* <p>
* Any thread may call this method.
* <p>
* @return a BufferedImage representing the entire screen
* @throws AWTException if the platform configuration does not allow low-level input control. This exception is always thrown when GraphicsEnvironment.isHeadless() returns true
* @throws SecurityException if createRobot permission is not granted
public static BufferedImage take() throws AWTException, SecurityException {
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
Rectangle region = new Rectangle(0, 0, d.width, d.height);
return take(region);
* Takes a screen shot of the specified region of the desktop.
* <p>
* Any thread may call this method.
* <p>
* @param region the Rectangle within the screen that will be captured
* @return a BufferedImage representing the specified region within the screen
* @throws IllegalArgumentException if region == null; region's width and height are not greater than zero
* @throws AWTException if the platform configuration does not allow low-level input control. This exception is always thrown when GraphicsEnvironment.isHeadless() returns true
* @throws SecurityException if createRobot permission is not granted
public static BufferedImage take(Rectangle region) throws IllegalArgumentException, AWTException, SecurityException {
if (region == null) throw new IllegalArgumentException("region == null");
return new Robot().createScreenCapture( region ); // altho not currently mentioned in its javadocs, if you look at its source code, the Robot class is synchronized so it must be multithread safe, which is why any thread should be able to call this method
// AWT Component versions:
* Takes a screen shot of that part of the desktop whose area is where component lies.
* Any other gui elements in this area, including ones which may lie on top of component,
* will be included, since the result always reflects the current desktop view.
* <p>
* Only {@link EventQueue}'s {@link EventQueue#isDispatchThread dispatch thread} may call this method.
* <p>
* @param component AWT Component to take a screen shot of
* @return a BufferedImage representing component
* @throws IllegalArgumentException if component == null; component's width and height are not greater than zero
* @throws IllegalStateException if calling thread is not EventQueue's dispatch thread
* @throws AWTException if the platform configuration does not allow low-level input control. This exception is always thrown when GraphicsEnvironment.isHeadless() returns true
* @throws SecurityException if createRobot permission is not granted
public static BufferedImage take(Component component) throws IllegalArgumentException, IllegalStateException, AWTException, SecurityException {
if (component == null) throw new IllegalArgumentException("component == null");
if (!EventQueue.isDispatchThread()) throw new IllegalStateException("calling thread (" + Thread.currentThread().toString() + ") is not EventQueue's dispatch thread");
Rectangle region = component.getBounds();
region.x = 0; // CRITICAL: this and the next line are what make region relative to component
region.y = 0;
return take(component, region);
* Takes a screen shot of that part of the desktop whose area is the region relative to where component lies.
* Any other gui elements in this area, including ones which may lie on top of component,
* will be included, since the result always reflects the current desktop view.
* <p>
* Only {@link EventQueue}'s {@link EventQueue#isDispatchThread dispatch thread} may call this method.
* <p>
* @param component AWT Component to take a screen shot of
* @param region the Rectangle <i>relative to</i> component that will be captured
* @return a BufferedImage representing component
* @throws IllegalArgumentException if component == null; component's width and height are not greater than zero; region == null
* @throws IllegalStateException if calling thread is not EventQueue's dispatch thread
* @throws AWTException if the platform configuration does not allow low-level input control. This exception is always thrown when GraphicsEnvironment.isHeadless() returns true
* @throws SecurityException if createRobot permission is not granted
public static BufferedImage take(Component component, Rectangle region) throws IllegalArgumentException, IllegalStateException, AWTException, SecurityException {
if (component == null) throw new IllegalArgumentException("component == null");
if (region == null) throw new IllegalArgumentException("region == null");
if (!EventQueue.isDispatchThread()) throw new IllegalStateException("calling thread (" + Thread.currentThread().toString() + ") is not EventQueue's dispatch thread");
Point p = new Point(0, 0);
SwingUtilities.convertPointToScreen(p, component);
region.x += p.x;
region.y += p.y;
return take(region);
// Swing JComponent versions:
* Takes a screen shot of <i>just</i> jcomponent
* (no other gui elements will be present in the result).
* <p>
* Only {@link EventQueue}'s {@link EventQueue#isDispatchThread dispatch thread} may call this method.
* <p>
* @param jcomponent Swing JComponent to take a screen shot of
* @return a BufferedImage representing jcomponent
* @throws IllegalArgumentException if jcomponent == null
* @throws IllegalStateException if calling thread is not EventQueue's dispatch thread
public static BufferedImage take(JComponent jcomponent) throws IllegalArgumentException, IllegalStateException {
if (jcomponent == null) throw new IllegalArgumentException("jcomponent == null");
if (!EventQueue.isDispatchThread()) throw new IllegalStateException("calling thread (" + Thread.currentThread().toString() + ") is not EventQueue's dispatch thread");
Dimension d = jcomponent.getSize();
Rectangle region = new Rectangle(0, 0, d.width, d.height);
return take(jcomponent, region);
* Takes a screen shot of <i>just</i> the specified region of jcomponent
* (no other gui elements will be present in the result).
* <p>
* Only {@link EventQueue}'s {@link EventQueue#isDispatchThread dispatch thread} may call this method.
* <p>
* @param jcomponent Swing JComponent to take a screen shot of
* @param region the Rectangle <i>relative to</i> jcomponent that will be captured
* @return a BufferedImage representing the region within jcomponent
* @throws IllegalArgumentException if jcomponent == null; region == null
* @throws IllegalStateException if calling thread is not EventQueue's dispatch thread
public static BufferedImage take(JComponent jcomponent, Rectangle region) throws IllegalArgumentException, IllegalStateException {
if (jcomponent == null) throw new IllegalArgumentException("jcomponent == null");
if (region == null) throw new IllegalArgumentException("region == null");
if (!EventQueue.isDispatchThread()) throw new IllegalStateException("calling thread (" + Thread.currentThread().toString() + ") is not EventQueue's dispatch thread");
boolean opaquenessOriginal = jcomponent.isOpaque();
Graphics2D g2d = null;
try {
jcomponent.setOpaque( true );
BufferedImage image = new BufferedImage(region.width, region.height, imageType);
g2d = image.createGraphics();
g2d.translate(-region.x, -region.y) ; // CRITICAL: this and the next line are what make region relative to component
g2d.setClip( region );
jcomponent.paint( g2d );
return image;
finally {
jcomponent.setOpaque( opaquenessOriginal );
if (g2d != null) g2d.dispose();
// -------------------- write --------------------
* Writes image to a newly created File named fileName.
* The graphics format will either be the extension found in fileName
* or else {@link #formatNameDefault} if no extension exists.
* <p>
* Any thread may call this method.
* <p>
* @param image the BufferedImage to be written
* @param fileName name of the File that will write image to
* @throws IllegalArgumentException if image == null; fileName is blank
* @throws IOException if an I/O problem occurs
public static void write(BufferedImage image, String fileName) throws IllegalArgumentException, IOException {
if (image == null) throw new IllegalArgumentException("image == null");
if (StringUtil.isBlank(fileName)) throw new IllegalArgumentException("fileName is blank");
File file = new File(fileName);
String formatName = FileUtil.getExtension(file);
if (formatName.length() == 0) formatName = formatNameDefault;
write(image, formatName, file);
* Writes image to file in the format specified by formatName.
* <p>
* Any thread may call this method.
* <p>
* @param image the BufferedImage to be written
* @param formatName the graphics file format (e.g. "pnj", "jpeg", etc);
* must be in the same set of values supported by the formatName arg of {@link ImageIO#write(RenderedImage, String, File)}
* @param file the File that will write image to
* @throws IllegalArgumentException if image == null; type is blank; file == null
* @throws IOException if an I/O problem occurs
public static void write(BufferedImage image, String formatName, File file) throws IllegalArgumentException, IOException {
if (image == null) throw new IllegalArgumentException("image == null");
if (StringUtil.isBlank(formatName)) throw new IllegalArgumentException("formatName is blank");
if (file == null) throw new IllegalArgumentException("file == null");
ImageIO.write(image, formatName, file);
// -------------------- Test (inner class) --------------------
* An inner class that consists solely of test code for the parent class.
* <p>
* Putting all the test code in this inner class (rather than a <code>main</code> method of the parent class) has the following benefits:
* <ol>
* <li>test code is cleanly separated from working code</li>
* <li>any <code>main</code> method in the parent class is now reserved for a true program entry point</li>
* <li>test code may be easily excluded from the shipping product by removing all the Test class files (e.g. on Windoze, delete all files that end with <code>$Test.class</code>)</li>
* </ol>
* Putting all the test code in this inner class (rather than a shadow external class) has the following benefits:
* <ol>
* <li>non-public members may be accessed</li>
* <li>the test code lives very close to (so is easy to find) yet is distinct from the working code</li>
* <li>there is no need to set up a test package structure</li>
* </ol>
public static class Test {
public static void main(String[] args) throws Exception {
Gui gui = new Gui();
EventQueue.invokeLater( gui.getBuilder() );
new Timer(1000, gui.getTimerActionListener()).start();
private static class Gui {
private Frame frame;
private TextField textField;
private JFrame jframe;
private JLabel jlabel;
private JPanel jpanel;
private int count = 0;
private Runnable getBuilder() {
return new Runnable() {
public void run() {
System.out.println("Creating a Frame with AWT widgets inside...");
frame = new Frame("ScreenShot.Test.main Frame");
textField = new TextField();
textField.setText( "Waiting for the screen shot process to automatically start..." );
frame.add(textField);
frame.pack();
frame.setLocationRelativeTo(null); // null will center it in the middle of the screen
frame.setVisible(true);
System.out.println("Creating a JFrame with Swing widgets inside...");
jframe = new JFrame("ScreenShot.Test.main JFrame");
jlabel = new JLabel(
"<html>" +
"To be, or not to be: that is the question:" + "<br>" +
"Whether 'tis nobler in the mind to suffer" + "<br>" +
"The slings and arrows of outrageous fortune," + "<br>" +
"Or to take arms against a sea of troubles," + "<br>" +
"And by opposing end them?" + "<br>" +
"To die: to sleep; No more;" + "<br>" +
"and by a sleep to say we end" + "<br>" +
"The heart-ache and the thousand natural shocks" + "<br>" +
"That flesh is heir to," + "<br>" +
"'tis a consummation Devoutly to be wish'd." + "<br>" +
"</html>"
jpanel = new JPanel();
jpanel.setBorder( BorderFactory.createEmptyBorder(20, 20, 20, 20) );
jpanel.add(jlabel);
jframe.getContentPane().add(jpanel);
jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jframe.pack();
Point p = frame.getLocation();
p.translate(0, frame.getSize().height + 10);
jframe.setLocation(p);
jframe.setVisible(true);
private ActionListener getTimerActionListener() {
return new ActionListener() {
public void actionPerformed(ActionEvent evt) {
try {
switch (count++) {
case 0:
displayMessage("Taking a screen shot of the entire desktop...");
ScreenShot.write( ScreenShot.take(), "desktop.png" );
break;
case 1:
displayMessage("Taking a screen shot of the central rectangle of the desktop...");
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
Rectangle region = getCenteredRectangle(d);
ScreenShot.write( ScreenShot.take(region), "desktopCenteredRectangle.png" );
break;
case 2:
displayMessage("Taking a screen shot of the TextField...");
ScreenShot.write( ScreenShot.take(textField), "textField.png" );
break;
case 3:
displayMessage("Taking a screen shot of the central rectangle of the TextField...");
d = textField.getSize();
region = getCenteredRectangle(d);
ScreenShot.write( ScreenShot.take(textField, region), "textFieldCenteredRectangle.png" );
break;
case 4:
displayMessage("Taking a screen shot of the JLabel...");
ScreenShot.write( ScreenShot.take(jlabel), "jlabel.png" );
break;
case 5:
displayMessage("Taking a screen shot of the central rectangle of the JLabel...");
d = jpanel.getSize();
region = getCenteredRectangle(d);
ScreenShot.write( ScreenShot.take(jpanel, region), "jpanelCenteredRectangle.png" );
break;
default:
System.exit(0);
break;
catch (Throwable t) {
t.printStackTrace(System.err);
private void displayMessage(String text) {
System.out.println(text);
textField.setText(text);
frame.pack();
frame.invalidate();
private Rectangle getCenteredRectangle(Dimension d) {
int x = d.width / 4;
int y = d.height / 4;
int width = d.width / 2;
int height = d.height / 2;
return new Rectangle(x, y, width, height);
} -
How do i use Connection pool in JSP pages
Hey everyone,
I am using a connection pool in my web application. I am using DbConnectionBroker from Javaexchange.com. It has a class that creates a connection pool available for the servlets. I am trying to figure out that how to use connection pool within the JSP pages if I want to connect to the database. In the servlets i am using DBConnectionBroker pool = (DbConnectionBroker) getServletContext().getAttribute("dbPool") to get database connection. How Can i use this in JSP page to get a db connection.
ThanksIf the reference to the connection pool is already stored as an ServletContex attribute, try:
<jsp:useBean id="dbPool" scope="application" class="com.javaexchange.dbConnectionBroker" />
<%
Connection con = dbPool.getConnection();
%> -
How we can generate dynamic menu in jsp page
Hi all,
how we can generate dynamic menu in jsp page.
Thanks
Manjinderby reading more about them on the web or in a good book, OR BY HIRING SOMEBODY TO DO SO. ;)
-
HOW to send a value to another jsp page
HOW to send a value to another jsp page, like user name in one jsp page to another jsp page
In the most simplest form...
// pageA.jsp
<html>
<body>
<form action="pageB.jsp" method="post">
<b>First Name:</b> <input type="text" name="FNAME" value="Joe">
<input type="submit" value="Submit">
</form>
</body>
</html>
// pageB.jsp
<html>
<body>
<b>Name:<b> <%=request.getParameter("FNAME")%>
</body>
</html> -
How to save a value in form jsp?
hi all,
i have a dropdown list in my struts web app,
i am having a form in which a bean is instatiated(bean has 2 properties "name" and "code").
i am using like this in the jsp:
<td><html:select property="item.code">
<logic:iterate id="itemType"
name="<%=WebConstants.getItemTypeListName()%>">
<option value='<bean:write name="ItemType" property="code"/>'><bean:write
name="ItemType" property="name" /></option>
</logic:iterate>
</html:select></td>
each "itemType" has "code" and "name".
when the user clicks on the item name on the dropdown item beans "code" is populating.now i need to populate "name" aswell at the sametime using hidden property.
i want to save tha value of name in the jsp to use it later to populate "name" in my form using hidden property?
do anyone have idea how to save the value in jsp?
regards and thanks in advanceThank you. I execute the program below. I can now retrive the data from the Lt.txt. But the value is limited to 3 digits. For example, the content of my file is 777888.
When I run the program, I only get 777. How can I retrive the whole exact number?
import java.io.*;
class Test {
public static void main(String args[]) {
try {
File inputFile = new File("Lt.txt");
File outputFile = new File("outagain.txt");
FileReader in = new FileReader("Lt.txt");
FileWriter out = new FileWriter(outputFile);
char[] tmp = new char[3];
int cnt = in.read(tmp);
System.out.print("\nRead: ");
for (int i = 0; i < cnt; i++) {
System.out.print(tmp); }
System.out.println(" ");
in.close(); }
catch (IOException ex) {
System.out.println("IOException:"+ex.toString()); } }} -
How to get the value in one JSP page to another?
Hi,
I have problems in passing the value around in JSP. I have two JSP pages as below:
test1.jsp
I try to get the vaule from my textbox by using:
String strUser = request.getParameter ("strUserName");
Then i print out by using: out.print(strUser); then i can get the value and put on my page (For example, i get ABC on my page).
test2.jsp
Next, i want to get the value from strUser (which mean that the one i already display on page in test1.jsp, ABC) to insert into my table by using INSERT INTO statement. Then i try by using
String strUser1 = request.getParameter ("strUser");
Is it possbile for me to do that? I cannot get anything to insert into my table. Then i tried out.print(strUser1); then i found that i get NULL value.
Could you please give me some guidance?
Thanks you very much for any advise you may give me.
KimsanHi,
Thank you very much for your help. It's working fine if i just get a one value to another page, however, i have problem while i pass the value in my loop to another page because i always get the last record. I try with the following code:
logged_page.jsp
<html>
<head>
<title>Welcome to the online Auction...</title></head>
<body>
<%@ page language ="java" import = "java.io.*, java.lang.*, java.sql.*" %>
<% try
String strUsername = request.getParameter("username");
session.setAttribute("myUserName", strUsername);
String strPassword = request.getParameter("password");
Class.forName ("sun.jdbc.odbc.JdbcOdbcDriver");
Connection myConn = DriverManager.getConnection("jdbc:odbc:Driver={MicroSoft Access Driver (*.mdb)};DBQ=C:/Auction/Auction.mdb");
String strSQL = "SELECT [UserName], [Password] FROM tblUserDetails where [UserName] = ? and [Password] = ?";
PreparedStatement statement = myConn.prepareStatement(strSQL);
statement.setString(1, strUsername);
statement.setString(2, strPassword);
ResultSet myResult = statement.executeQuery();
if(myResult.next())
//out.println("Login Succesful! A record with the given user name and password exists");
out.print("<center><h1>");
out.print("Welcome ");
out.print(strUsername);
out.print("</h1></center>");
out.print("<center>");
out.print("<BR><BR>");
out.print("<font font face = Viner Hand ITC size= 5>Products on sales</font>");
out.print("<BR><BR>");
Statement myStatement = myConn.createStatement ();
ResultSet myResult1 = myStatement.executeQuery("SELECT * FROM tblProduct");
ResultSetMetaData myResultSet = myResult1.getMetaData();
out.println("<font face=Tahoma>");
out.print("<table border=1 CELLSPACING=0>");
out.print("<TR>");
out.print("<TD width = 200> Item Title");out.print("</TD>");
out.print("<TD width = 200> Description");out.print("</TD>");
out.print("<TD width = 200> Current bid");out.print("</TD>");
out.print("<TD width = 200> Available Time");out.print("</TD>");
out.print("<TD width = 200> Place Bid");out.print("</TD>");
out.print("</TR>");
out.print("</table>");
while(myResult1.next())
String strProName = myResult1.getString(1);
session.setAttribute("myProName", strProName);
out.print("<table border=1 CELLSPACING=0>");
out.print("<TR>");
out.print("<TD width = 200>");
out.println(strProName);
out.print("</TD>");
out.print("<TD width = 200>");
out.println(myResult1.getString(3));
out.print("</TD>");
out.print("<TD width = 200>");
out.println(myResult1.getString(2));
out.print("</TD>");
out.print("<TD width = 200>");
out.println(myResult1.getString(4));
out.print("</TD>");
out.print("<TD>");
out.print("<form action=bid_page.jsp method=post>");
out.print("<input type=text name=place_bid>");
out.print("<input type=submit name=okfunc value=Bid>");
out.print("</TD>");
out.print("</form>");
out.print("</TR>");
out.print("</table>");
out.println("</font>");
out.print("</center>");
else
out.print("<center>");
out.print("Sorry ");
out.print("<font color = RED size = 5>");
out.print(strUsername);
out.print("</font>");
out.print(" could not be found.");
out.print("</center>");
myResult.close();
statement.close();
myConn.close();
catch(SQLException e)
out.println(e);
%>
</body>
</html>
bid_page.jsp
<HTML>
<HEAD>
<TITLE>Welcome to the online Auction...</TITLE>
</HEAD>
<BODY>
<%@ page language ="java" import = "java.io.*" import = "java.lang.*" import = "java.sql.*" %>
<% try
String thisUserName = (String) session.getAttribute("myUserName");
String thisProName = (String) session.getAttribute("myProName");
Class.forName ("sun.jdbc.odbc.JdbcOdbcDriver");
Connection myConn = DriverManager.getConnection("jdbc:odbc:Driver={MicroSoft Access Driver (*.mdb)};DBQ=C:/Auction/Auction.mdb");
PreparedStatement myStatement = myConn.prepareStatement("INSERT INTO tblHistory VALUES ('"+thisUserName+"', '"+thisProName+"', '"+request.getParameter("place_bid")+"')");
myStatement.executeUpdate();
myConn.commit();
myStatement.close();
myConn.close();
catch(Exception e){}
%>
</BODY>
</HTML>
When i click on the BID button in the logged_page.jsp then i always get the last record and save into my table and that is not what i want to. i want to get the result on the same row as the BID button that just click and save to my table.
Could you please advise?
Thanks you very much for your time and any consideration you may give me.
Best Regard,
Kimsan -
How to retrieve data and display in JSP page
hi,
i am trying to retrieve data from SQL server 2000 and display in JSP Page. I have already place the codes of the retrieve in the bean file. I wanna ask is that how to display in the JSP page. If possible, can provide example codings for mi to reference?
Thanks
Regards,
shixuanHI Tan ,
I pressume that you wanted to make use of PDK, the code can go like this .
<b><u>1) JAVA file</u></b>
import com.sapportals.htmlb.DropdownListBox;
import com.sapportals.htmlb.InputField;
import com.sapportals.htmlb.event.Event;
import com.sapportals.htmlb.page.DynPage;
import com.sapportals.htmlb.page.PageException;
import com.sapportals.portal.htmlb.page.JSPDynPage;
import com.sapportals.portal.htmlb.page.PageProcessorComponent;
import com.sapportals.portal.prt.component.IPortalComponentRequest;
import com.sapportals.portal.prt.component.IPortalComponentSession;
import com.sapportals.portal.prt.component.IPortalComponentContext;
import java.sql.*;
public class P_SAP_B_User extends PageProcessorComponent
* Method : getPage()
* Description :
* Input Parameters : None
* Returns : Object of Class DynPage
public DynPage getPage()
return new P_SAP_B_UserDynPage();
} // end of dynPage()
public static class P_SAP_B_UserDynPage extends JSPDynPage
/* Variable Declaration */
/* Object of bean class P_SAP_B_CreateUser initialised to null */
private P_SAP_B_CreateUser createUserBean = null;
/* Flags for checking the occurance of Event & Error. */
private int iFlag=0;
private int iErrFlag=0;
/* Variables for storing the information
entered by user in each text field */
private String sFname;
private String sSname;
private String sAge;
private String sExp;
private String sSkill;
private String sUnit;
* Method : doInitialization()
* Description :
* Input Parameters : None
* Returns : None
public void doInitialization()
IPortalComponentSession componentSession = ((IPortalComponentRequest)getRequest()).getComponentSession();
Object o = componentSession.getValue("createUserBean");
if(o==null || !(o instanceof P_SAP_B_CreateUser))
createUserBean = new P_SAP_B_CreateUser();
componentSession.putValue("createUserBean",createUserBean);
} // end of if
else
createUserBean = (P_SAP_B_CreateUser) o;
} // end of else
}//end of doInitialisation()
* Method : onUpdate()
* Description :
* Input Parameters : object of Event class
* Returns : None
public void onUpdate(Event e)throws PageException
/* sets flag to 1 when update button is clicked. */
iFlag=1;
* Method : doProcessAfterInput()
* Description :
* Input Parameters : None
* Returns : None
public void doProcessAfterInput() throws PageException
InputField ifFirstName = (InputField) getComponentByName("FirstName");
InputField ifSecondName = (InputField) getComponentByName("SecondName");
InputField ifAge = (InputField) getComponentByName("Age");
InputField ifExp = (InputField) getComponentByName("Exp");
InputField ifSkill = (InputField) getComponentByName("Skill");
DropdownListBox dlbUnit = (DropdownListBox) getComponentByName("Unit");
int iAge,iExp;
IPortalComponentRequest request = (IPortalComponentRequest) this.getRequest();
IPortalComponentContext myContext = request.getComponentContext();
P_SAP_B_CreateUser myNameContainer = (P_SAP_B_CreateUser) myContext.getValue("createUserBean");
if(ifFirstName != null)
this.sFname = ifFirstName.getValueAsDataType().toString() ;
} // end of if
if(ifSecondName!= null)
this.sSname = ifSecondName.getValueAsDataType().toString() ;
} // end of if
if(ifAge!= null)
this.sAge = ifAge.getValueAsDataType().toString() ;
} // end of if
if(ifExp!= null)
this.sExp = ifExp.getValueAsDataType().toString() ;
} // end of if
if(ifSkill != null)
this.sSkill = ifSkill.getValueAsDataType().toString() ;
} // end of if
if(dlbUnit != null)
this.sUnit = dlbUnit.getSelection().toString() ; ;
} // end of if
/* Data Validation */
/* try block for numeric Exception */
try
/* checking for any field left blank by the user */
if(sFname.equals("") || sSname.equals("") || sAge.equals("")|| sExp.equals("") || sSkill.equals(""))
/* set error flag to 1 in case of any field left blank */
iErrFlag=1;
} // end of if
else
/* converting Age and Experience fields (String) to integer */
iAge= Integer.parseInt(sAge);
iExp= Integer.parseInt(sExp);
/* setting the boundaries on the value in Age Field */
if(iAge<0)
/* set error flag to 2 in case of age below 0 */
iErrFlag=2;
}// end of if
/* setting the boundaries on the value in Experience field */
else if(iExp<0 ||(iExp/12)>=iAge)
/* set error flag to 3 in case of experience below 0 or exceeding the age in years */
iErrFlag=3;
}// end of else if
/* In case of no error */
else
/* setting the bean variables */
try
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con = DriverManager.getConnection("jdbc:odbc:Test");
String query="insert into UserData values(?,?,?,?,?,?)";
PreparedStatement prestat=con.prepareStatement(query);
/* setting the values to be inserted into the user table */
prestat.setString(1,sFname);
prestat.setString(2,sSname);
prestat.setString(3,sAge);
prestat.setString(4,sExp);
prestat.setString(5,sSkill );
prestat.setString(6,sUnit);
prestat.executeUpdate() ;
prestat.close();
con.close();
myNameContainer.setSFname(sFname);
myNameContainer.setSLname(sSname);
myNameContainer.setSAge(sAge);
myNameContainer.setSExp(sExp);
myNameContainer.setSSkill(sSkill);
myNameContainer.setSUnit(sUnit);
} // end of inner try block
catch(Exception sqle)
myNameContainer.setErrMessage("Update failed ! Please try again." );
} // end of catch corresponding to inner try
} // end of inner else
} //end of outer else
} //end of outer try block
catch(Exception e)
/* setting flag to 4 in case of non-numeric age/experience values */
iErrFlag = 4;
/* Displaying error message corresponding to the value of error flag */
switch(iErrFlag)
/* Empty Field */
case 1:myNameContainer.setErrMessage( "Please Fill all the fields");
break;
/* Invalid Value in the age field */
case 2:myNameContainer.setErrMessage( "Enter a valid value in Age field.(Hint : Have you entered Age<0 ?");
break;
/* Invalid Value in the experience field */
case 3:myNameContainer.setErrMessage( "Enter a valid value in Experience field.(Hint : Experince should not be negative or greater than your age in months)");
break;
/* Non-numeric value in the Age/ experience fields */
case 4:myNameContainer.setErrMessage( "Please Enter Numeric Value for Age and Experience");
break;
} // end of switch-case block
} //end of doProcessAfterInput()
* Method : doProcessBeforeOutput()
* Description :
* Input Parameters : None
* Returns : None
public void doProcessBeforeOutput() throws PageException
/* Displays Form for new user creation by default */
this.setJspName("P_SAP_B_UserCreationForm.jsp");
/* In case of an error display an error message page */
if(iErrFlag!=0)
setJspName("ErrorPage.jsp");
} //end of if
/* Displays the user's information as entered in the SQL
database after its been uploaded by the user */
else if(iFlag==1)
setJspName("hello.jsp");
} // end of else if
} // end of doProcessBeforeOutput()
} // end of P_SAP_B_UserDynPage Class
} // end of P_SAP_B_User class
* End of File P_SAP_B_User.java
2) Bean
package com.sap.usercreation;
import java.io.Serializable;
public class P_SAP_B_CreateUser implements Serializable
private String sFname;
private String sLname;
private String sUnit;
private String sSkill;
private String sExp;
private String sAge;
private String errMessage;
* @return
public String getSFname() {
return sFname;
* @return
public String getSLname() {
return sLname;
* @param i
* @param string
public void setSFname(String string) {
sFname = string;
* @param string
public void setSLname(String string) {
sLname = string;
* @return
public String getSUnit() {
return sUnit;
* @param string
public void setSUnit(String string) {
sUnit = string;
* @return
public String getSSkill() {
return sSkill;
public void setSSkill(String string) {
sSkill = string;
* @return
public String getSAge() {
return sAge;
* @return
public String getSExp() {
return sExp;
* @param string
public void setSAge(String string) {
sAge = string;
* @param string
public void setSExp(String string) {
sExp = string;
* @return
public String getErrMessage() {
return errMessage;
* @param string
public void setErrMessage(String string) {
errMessage = string;
3) The Jsp file i have already posted.
See if you copy this code and paste it wont work as i have not given you full code ,But yes this gives you an overview of how things can be done .
Thanx
Pankaj -
How to return javascript function value to jsp page
Hi i want to retrieve values from javascript function to jsp page, how can i do that ? i am trying this but its not working
<script language="javascript" type="text/javascript" src="/feedback/common/scripts/config.js"></script>
<script language="javascript" type="text/javascript" src="/feedback/common/scripts/richtext.js"></script>
<td>
<jsp:param id="description" value= "<%=request.initRTE('', '')%>"/>
</td>
here this initRTE function is used for displaying rich text editor .....i want to retrieve back the contetnt written in this editor and save it to DB.
Please help.
Edited by: xtech on Apr 4, 2008 12:00 PMsurely i will do that but my app is still not working.....
here is my code
</td>
<td align="left">
<script language="javascript" type="text/javascript" src="/feedback/common/scripts/config.js"></script>
<script language="javascript" type="text/javascript" src="/feedback/common/scripts/richtext.js"></script>
<h:inputHidden id="introtext" value= "<%=request.getParameterValues(description)%>">
<script>
initRTE('','');
</script>
</td>
in java script function i am geeting the text content
function initRTE(rtePreloadContent, rteCSS) {
rtePreloadContent=document.getElementById('surveyinfo:introtext').value;
startRTE(rtePreloadContent);
menuBuilder();
var description= document.getElementById(rteFormName).value;
return description;
basically i want to get the text written in text editor in jsp and want to send it to DB.(Here initRTE() function is calling rich text editor)
i have downloaded this editor from this url
http://freerichtexteditor.com/page/4.htm
and trying to embed it in my app. -
How to embad a movie file in jsp page.
I want to run a movie file in my jsp page.
please provide the code how to do this.
thanks
uttamHi,
so what source address of js file i have to give in jsp page.....in your case you can use below include command
<jsp:include page="script/test.js" /> // here test.js is your .js file nameGenerally we need to place all jsp and js files under "jdevhome\jdev\myhtml\OA_HTML". In this case you can use
<jsp:include page="test.js" /> // here test.js is your .js file nameor
<%@include file="test.js" %> // here test.js is your .js file nameregards,
Anand -
How to produce a graph in the jsp page dynamically
I want to generate a graph dynamically in my jsp page, depending on the data in my database. Please help how can i do this and the possible ways to do this.
What you need to do is to represent the graph as an image on some part of the page, using an IMG tag.
That means you need a second transaction to fetch the image data, and you need to tie the two together.
The standard approach is to use a servlet to deliver the image, and the src URL generated on your HTML output has some kind of token to identify which graph is to be delivered. So the intial transaction creates a indetifier of some kind, which is likely used to identify image data accessed from session context. Then, when the browser interprets the HTML, it sends a request to the server for the image, which the servlet then generates based on the identifier.
If you use JFreeChart much of this stuff is available from the library. -
How to set an 'alias' for a JSP page in web.xml
Hi
Suppose I have a JSP page called SimplePage.jsp and I want to refer to it by someother name while running the application how do I do this in the web.xml file. I have used <servlet-mapping> to do this in the case of a servlet. However I am not sure how to do this with a JSP
Could somebody show me how to do this. I would be very much grateful.
All help appreciated and acknowledged.
thanks in advance
ilangoIt worked. The correct web.xml version is as below:
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app SYSTEM "http://java.sun.com/dtd/web-app_2_3.dtd" [
]>
<web-app>
<!-- Define servlets that are included in the example application -->
<servlet>
<servlet-name>ControllerServlet</servlet-name>
<servlet-class>ControllerServlet</servlet-class>
<init-param>
<param-name>base</param-name>
<param-value>http://localhost:8080/MVCIIapp/servlet/ControllerServlet</param-value>
</init-param>
<init-param>
<param-name>jdbcDriver</param-name>
<param-value>sun.jdbc.odbc.JdbcOdbcDriver</param-value>
</init-param>
<init-param>
<param-name>imageUrl</param-name>
<param-value>http://localhost:8080/MVCIIapp/images/</param-value>
</init-param>
<init-param>
<param-name>dbUrl</param-name>
<param-value>jdbc:odbc:Burnaby</param-value>
</init-param>
<init-param>
<param-name>ilangocal</param-name>
<param-value/>
</init-param>
<init-param>
<param-name>mangla</param-name>
<param-value/>
</init-param>
</servlet>
<servlet>
<servlet-name>Header</servlet-name>
<jsp-file>/MVCIIapp/jsp/Header.jsp</jsp-file>
</servlet>
<servlet-mapping>
<servlet-name>ControllerServlet</servlet-name>
<url-pattern>/Master</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>Header</servlet-name>
<url-pattern>/Opener</url-pattern>
</servlet-mapping>
</web-app>
I have other jps files too.I am going to try and put aliases for them and see how they perform.
I hope I have not spoken too soon by saying that the aliases work. Let me wait and watch with bated breath.
But thanks a lot for your suggestions without which this would not have been possible
ilango -
How to convert text values acceses from jsp page into an xml file?
/* this is the jsp page which i want to convert it into an xml file
please help me , i thank in advance*/
<html>
<head>
<title> xml test</title>
</head>
<body>
<form action="testxml2.jsp" method = post>
<ul>
<li>
<ul>NAME:
<br>
<li>First Name:<INPUT NAME="firstName" TYPE=text SIZE=20><br>
<li>Middle Name:<INPUT NAME="middlename" TYPE=text SIZE=20><br>
<li>Last Name:<INPUT NAME="lastname" TYPE=text SIZE=20><br>
<li>t Name:<INPUT NAME="tname" TYPE=text SIZE=20><br>
</ul>
<br>
<ul>Role:</b><p><input type="radio" name="role" value="buyer">Buyer<p>
<input type="radio" name="role" value="seller">Seller<p>
<input type="radio" name="role" value="thirdparty">Third Party<p>
</ul>
<ul>
Qualification:<br>
<li>Highest Degree:<INPUT NAME="degree" TYPE=text SIZE=20><br>
<li>Percentage: <INPUT NAME="percentage" TYPE=text SIZE=20><br>
</ul>
<ul> Adress:
<li> streetName:<INPUT NAME="street" TYPE=text SIZE=20><br>
<li>cityName:<INPUT NAME="city" TYPE=text SIZE=20><br>
<li>StateName:<INPUT NAME="state" TYPE=text SIZE=20><br>
</ul>
</ul>
<b>
<INPUT TYPE=SUBMIT VALUE="ENTER" >
</body>
</html>hi there,
In the MCV there is a part about struts, this is a descent way to do this.
how to do it:
create an actionform containing all the properties of the page.
then when you submit your form use an method in the actionforms (that you have written) that makes sets your data in a xml file.
this works very quickely and i use it in production...
you can choose if you want the xml to generaded hard coded or via a parser.
greetings
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