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  • unable to catch org.hibernate.StaleObjectStateException while deleting record that doesn't exists in database

    - by JAB
    My application has a delete user option. Now in order to check concurrency condition I tried the following use case opened application in chrome and firefox browser. deleted user in firefox now trying to delete the same user in chrome browser I get exception org.hibernate.StaleObjectStateException .. which is right .. since I am trying to delete an object which doesn't exists. But I am not able to catch this exception try{ getHibernateTemplate().delete(userObj); } catch (StaleObjectStateException e) { e.printStackTrace(); } How do i catch this exception ??

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  • n00b: receive input over TCP/IP and use it to update HTML

    - by mawg
    This has got to be a FAQ, so can someone please just direct me to a "network programming for dummies" URL? The server wants to push information to a client or broadcast to all, when an event happens - as opposed to the clients constantly polling the server "just in case". The client then updates a browser page display. How do I do that? (toldya it was a n00b question) Should I have a thread which receives info on a socket and then writes it to a database which the browser display (PHP) can process with an HTML refresh tag, or what? Sorry to sound so dumb.

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  • In WPF Not Able to Kill Adobe Acrobat Reader

    - by Blam
    Problem with killing Adobe Acrobat Reader Code used to launch the process nativeProcess = new Process(); nativeProcess.StartInfo.FileName = filePath; nativeProcess.Start(); These are Microsoft Office Files or Adobe Acrobat. Code used to kill if (nativeProcess != null) { try { nativeProcess.Kill(); } catch { } } if (nativeProcess != null) { try { nativeProcess = null; } catch { } } My problem is that Adobe Acrobat Reader does not Kill() when the app is running as a Citrix app. If I log on at the Citrix box and run it as a Desktop app then Acrobat Kill() works. Microsoft Office Kills() fine as both a Citrix app and a Deskop app. User can close Acrobat Reader using the X or close

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  • jquery fancy box

    - by André Alçada Padez
    Hi, i'm using fancy box for some content editing in my backoffice. I recently added an image manager wich i create with javascript. It's kind of like a fancybox, but i had to do it from scractch for it to be able to overlay the first one. My problem is this: I want to have the user being able to press the escape key to close my manager, but if i use $(window).keypress when i press the esc key, both the boxes close. I have tried $(window).unbind('keypress') when i start loading my box, and i have tried to look through the fancybox js file, but it is minimized. Does anyone know how i can disable and afterwards enable the escape key (during runtime) on the fancybox? Thanx

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  • Detecting a message box opened in another application

    - by richie
    I am developing a windows service, in vb .et, that launches a legacy application that performs some work. The service acts as a wrapper around the legacy app allowing users to automate an otherwise manual operation. Everything is working great, except occasionally the legacy app displays a messagebox. When it does this the process halts until the message box is closed. As the service will be running on a server there will be no user to close the message box. The service launches the legacy application in a System.Diagnostics.Process. My question is, is there way to detect that a message box has been displayed by a process that I have started using System.Diagnostics.Process and is there a way to through code to close the messagebox. I've tried to be brief so if you need more information please let me know. Thanks in advance Richie

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  • Can I find out which thread is running using Eclipse?

    - by Roman
    I close my application by pressing a "Close" button. But in the Eclipse I see a red square indicating that something is still running. When I press this red square, I kill my application completely. Is it possible to find out what is still running (which method, which loop) using Eclipse? P.S. I am a newbie. So, it would be nice to have a simple solution. I also might not understand your answer if you use "technical" words which I do not know.

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  • HttpURLConnection! Connection.getInputStream is java.io.FileNotFoundException

    - by user3643283
    I created a method "UPLPAD2" to upload file to server. Splitting my file to packets(10MB). It's OK (100%). But when i call getInputStream, i get FileNotFoundException. I think, in loop, i make new HttpURLConnection to set "setRequestProperty". This is a problem. Here's my code: @SuppressLint("NewApi") public int upload2(URL url, String filePath, OnProgressUpdate progressCallBack, AtomicInteger cancelHandle) throws IOException { HttpURLConnection connection = null; InputStream fileStream = null; OutputStream out = null; InputStream in = null; HttpResponse response = new HttpResponse(); Log.e("Upload_Url_Util", url.getFile()); Log.e("Upload_FilePath_Util", filePath); long total = 0; try { // Write the request. // Read from filePath and upload to server (url) byte[] buf = new byte[1024]; fileStream = new FileInputStream(filePath); long lenghtOfFile = (new java.io.File(filePath)).length(); Log.e("LENGHT_Of_File", lenghtOfFile + ""); int totalPacket = 5 * 1024 * 1024; // 10 MB int totalChunk = (int) ((lenghtOfFile + (totalPacket - 1)) / totalPacket); String headerValue = ""; String contentLenght = ""; for (int i = 0; i < totalChunk; i++) { long from = i * totalPacket; long to = 0; if ((from + totalPacket) > lenghtOfFile) { to = lenghtOfFile; } else { to = (totalPacket * (i + 1)); } to = to - 1; headerValue = "bytes " + from + "-" + to + "/" + lenghtOfFile; contentLenght = "Content-Length:" + (to - from + 1); Log.e("Conten_LENGHT", contentLenght); connection = client.open(url); connection.setRequestMethod("POST"); connection.setRequestProperty("Content-Range", headerValue); connection.setRequestProperty("Content-Length", Long.toString(to - from + 1)); out = connection.getOutputStream(); Log.e("Lenght_Of_File", lenghtOfFile + ""); Log.e("Total_Packet", totalPacket + ""); Log.e("Total_Chunk", totalChunk + ""); Log.e("Header_Valure", headerValue); int read = 1; while (read > 0 && cancelHandle.intValue() == 0 && total < totalPacket * (i + 1)) { read = fileStream.read(buf); if (read > 0) { out.write(buf, 0, read); total += read; progressCallBack .onProgressUpdate((int) ((total * 100) / lenghtOfFile)); } } Log.e("TOTAL_", total + "------" + totalPacket * (i + 1)); Log.e("I_", i + ""); Log.e("LENGHT_Of_File", lenghtOfFile + ""); if (i < totalChunk - 1) { connection.disconnect(); } out.close(); } // Read the response. response.setHttpCode(connection.getResponseCode()); in = connection.getInputStream(); // I GET ERROR HERE. if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) { throw new IOException("Unexpected HTTP response: " + connection.getResponseCode() + " " + connection.getResponseMessage()); } byte[] body = readFully(in); response.setBody(body); response.setHeaderFields(connection.getHeaderFields()); if (cancelHandle.intValue() != 0) { return 1; } JSONObject jo = new JSONObject(response.getBodyAsString()); Log.e("Upload_Body_res_", response.getBodyAsString()); if (jo.has("error")) { if (jo.has("code")) { int errCode = jo.getInt("code"); Log.e("Upload_Had_errcode", errCode + ""); return errCode; } else { return 504; } } Log.e("RESPONE_BODY_UPLOAD", response.getBodyAsString() + ""); return 0; } catch (Exception e) { e.printStackTrace(); Log.e("Http_UpLoad_Response_Exception", e.toString()); response.setHttpCode(connection.getResponseCode()); Log.e("ErrorCode_Upload_Util_Return", response.getHttpCode() + ""); if (connection.getResponseCode() == 200) { return 1; } else if (connection.getResponseCode() == 0) { return 1; } else { return response.getHttpCode(); } // Log.e("ErrorCode_Upload_Util_Return", response.getHttpCode()+""); } finally { if (fileStream != null) fileStream.close(); if (out != null) out.close(); if (in != null) in.close(); } } And Logcat 06-12 09:39:29.558: W/System.err(30740): java.io.FileNotFoundException: http://download-f77c.fshare.vn/upload/NRHAwh+bUCxjUtcD4cn9xqkADpdL32AT9pZm7zaboHLwJHLxOPxUX9CQxOeBRgelkjeNM5XcK11M1V-x 06-12 09:39:29.558: W/System.err(30740): at com.squareup.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:187) 06-12 09:39:29.563: W/System.err(30740): at com.fsharemobile.client.HttpUtil.upload2(HttpUtil.java:383) 06-12 09:39:29.563: W/System.err(30740): at com.fsharemobile.fragments.ExplorerFragment$7$1.run(ExplorerFragment.java:992) 06-12 09:39:29.568: W/System.err(30740): at java.lang.Thread.run(Thread.java:856) 06-12 09:39:29.568: E/Http_UpLoad_Response_Exception(30740): java.io.FileNotFoundException: http://download-f77c.fshare.vn/upload/NRHAwh+bUCxjUtcD4cn9xqkADpdL32AT9pZm7zaboHLwJHLxOPxUX9CQxOeBRgelkjeNM5XcK11M1V-x

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  • Where did the text of my .html file go in text edit on mac. [closed]

    - by David
    I recently created a .html file in text edit on my mac (os x 10.5.8). I then opened that .html file in my browser and it showed the page i created just fine. I closed the .html file and text edit and refreshed the page. It still worked fine. Then i opened up the .html file in text edit again and all the text was gone (the page in the browser still works fine though). Where did all the text go?

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  • On activate does not fire with my Modal/Pop-Up form to Requery

    - by Odesmere
    I have a modal/pop-up form frmEditContact open on this form there is a combo box full of addressescmbAddressList, populated by a query. when the user wants to add an address that doesn't exist there is a button that opens the frmAddress where they may add an address. frmAddress allows them to enter an address to the list and gives the option to save, or cancel (both actions close the form after). with this form closed, the focus is now again on frmEditContact I would like to repopulate the combo box using docmd.Requery cmbAddressList after they close the other form I'm not sure where to handle this, I've tried On Avtivate, On Load, On Update, On Open, On Focus...but none of them fire as I keep the frmEditContact open when they are using the other form is there a way to keep frmEditContact open the whole time, but still an action Event that will fire so that I can Requery? And does On Activate not work with modal forms?

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  • How to process events chain.

    - by theblackcascade
    I need to process this chain using one LoadXML method and one urlLoader object: ResourceLoader.Instance.LoadXML("Config.xml"); ResourceLoader.Instance.LoadXML("GraphicsSet.xml"); Loader starts loading after first frameFunc iteration (why?) I want it to start immediatly.(optional) And it starts loading only "GraphicsSet.xml" Loader class LoadXml method: public function LoadXML(URL:String):XML { urlLoader.addEventListener(Event.COMPLETE,XmlLoadCompleteListener); urlLoader.load(new URLRequest(URL)); return xml; } private function XmlLoadCompleteListener(e:Event):void { var xml:XML = new XML(e.target.data); trace(xml); trace(xml.name()); if(xml.name() == "Config") XMLParser.Instance.GameSetup(xml); else if(xml.name() == "GraphicsSet") XMLParser.Instance.GraphicsPoolSetup(xml); } Here is main: public function Main() { Mouse.hide(); this.addChild(Game.Instance); this.addEventListener(Event.ENTER_FRAME,Game.Instance.Loop); } And on adding a Game.Instance to the rendering queue in game constuctor i start initialize method: public function Game():void { trace("Constructor"); if(_instance) throw new Error("Use Instance Field"); Initialize(); } its code is: private function Initialize():void { trace("initialization"); ResourceLoader.Instance.LoadXML("Config.xml"); ResourceLoader.Instance.LoadXML("GraphicsSet.xml"); } Thanks.

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  • file_operations Question, how do i know if a process that opened a file for writing has decided to c

    - by djTeller
    Hi Kernel Gurus, I'm currently writing a simple "multicaster" module. Only one process can open a proc filesystem file for writing, and the rest can open it for reading. To do so i use the inode_operation .permission callback, I check the operation and when i detect someone open a file for writing I set a flag ON. i need a way to detect if a process that opened a file for writing has decided to close the file so i can set the flag OFF, so someone else can open for writing. Currently in case someone is open for writing i save the current-pid of that process and when the .close callback is called I check if that process is the one I saved earlier. Is there a better way to do that? Without saving the pid, perhaps checking the files that the current process has opened and it's permission... Thanks!

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  • Using javascript to check which CDN jQuery is cached from on the client

    - by Hazro City
    Can I use JavaScript to check whether JQuery is (already) downloaded (cached) on the target web browser (user) or not? For Example: If (JQuery-from-Microsoft-CDN-downloaded) Then use http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.4.4.js Else if (JQuery-from-Google-APIs- downloaded) Then use http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js Else if (JQuery-from-code.jquery.com- downloaded) Then use http://code.jquery.com/jquery-1.4.4.min.js Else use jQuery from my own website. Means that using the ability of javascript to check whether one of them is downloaded on the target User (Web Browser), if not then use jQuery from my own website otherwise if true then use that version of JQuery that is downloaded on the target User.

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  • MS Word to Stylesheet

    - by Chris Johnson
    Is there an easy way to automatically convert a bunch of MS Word documents to xslt stylesheets that can be displayed in the browser? What I have is a large collection of forms in Word format that have to be displayed in the browser, or sent to the user, with known fields populated from a data source, edited by a user and, finally, printed (including the original headers and footers). The data entered by the user will not need to be saved. I'm not sure if converting the documents to stylesheets is even feasible. Maybe someone has a better idea of how to achieve this? Installing Office on the server is not an option in my case.

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  • which layout engine for finding coordinates of html elements on the web page?

    - by Mexx
    I am doing some web data classification task and was thinking if I could get the co-ordinates of html elements as they would appear on a web-browser without taking into consideration any css or javascript being referred in the web page. My language of programming is c++ and the need results for a couple million of pages, so it has to be fast. I know there is a Microsoft COM component which renders the page in a web browser control and then can be queried for position of different html tags. But this is not suitable in my case as it first renders the whole page which takes up a lot of time. So as I found out, there are open-source layout engines WebKit, Gecko that can probably be used for this. But that's a huge piece of code and I need someone to direct me to the right classes or right modules to look into or any previous/similar work someone has done previously. Also, please let me know what you guys think is a good choice if I want to customize the existing code for use with multiple threads to make it faster. Thanks

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  • Have a doubt on uritemplates in WCF Services

    - by Debby
    I have a webservice with following operation contract and my service is hosted at //localhost:9002/Service.svc/ (I did not put http: before the localhost, as new user can post only one hyperlink) [OperationContract] [WebGet ( UriTemplate = "/Files/{Filepath}" ) ] Stream DownloadFile(string Filepath); This webservice would let users download file, if the proper filepath is provided (assuming, i somehow findout proper filepath). Now, I can access this service from a browser by typing, //localhost:9002/Service.svc/Files/(Filepath} If {filepath} is some simple string, its not a problem, but i want to send the location of the file. Lets us say users want to download file "C:\Test.mp3" on the server. But how can I pass "C:\Test.mp3" as {Filepath}. I get an error when i type http://localhost:9002/Service.svc/Files/C:\Test.mp3 in the browser. I am new to webservices and find that quickest way to clear doubts is in this community.

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  • is it better to use a "natural" language to write code?

    - by M.H
    I recently saw a programming language called supernova and they said in the web page : The Supernova Programming language is a modern scripting language and the First one presents the concept of programming with direct Fiction Description using Clear subset of pure Human Language. and you can write code like: i want window and the window title is Hello World. i want button and button caption is Close. and button name is btn1. btn1 mouse click. instructions are you close window end of instructions my question is not about the language itself but it is that are we need such languages and did they make writing code easier or not?

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  • [PHP] - Lowering script memory usage in a "big" file creation

    - by Riccardo
    Hi there people, it looks like I'm facing a typical memory outage problem when using a PHP script. The script, originally developed by another person, serves as an XML sitemap creator, and on large websites uses quite a lot of memory. I thought that the problem was related due to an algorithm holding data in memory until the job was done, but digging into the code I have discovered that the script works in this way: open file in output (will contain XML sitemap entries) in the loop: ---- for each entry to be added in sitemap, do fwrite close file end Although there are no huge arrays or variables being kept in memory, this technique uses a lot of memory. I thought that maybe PHP was buffering under the hood the fwrites and "flushing" data at the end of the script, so I have modified the code to close and open the file every Nth record, but the memory usage is still the same.... I'm debugging the script on my computer and watching memory usage: while script execution runs, memory allocation grows. Is there a particular technique to instruct PHP to free unsed memory, to force flushing buffers if any? Thanks

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  • __doPostBack is undefined on DotNetNuke website for IE 10

    - by nick
    I have a DotNetNuke site, and today a customer called in and said it wasn't working on IE 10. Specifically the login and register links weren't working, but they do in compatibility mode. I took a look on our test windows 8 machine and saw that it was failing because __doPostBack was undefined. I've been searching for a fix for the last 6ish hours, and what I've been able to find is that apparently the IE10 user agent is covered in the ie.browser file and that I should install this hotfix and reboot the server. That didn't work. I haven't noticed any changes, even though I think the new ie.browser file should match the new user agent. What other steps can I take to fix the problem? Note: the server is running .NET 3.5 with service pack 1 on Windows server 2003. The site is running DotNetNuke 05.06.02. Any suggestions would be greatly appreciated.

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  • Assign value to HTML textbox from JSP

    - by prakash_d22
    Hello I am creating a web page to add some information about given product.I need to enter id,name,description and image as information.I need the id to be auto generated.I am using jsp and database as access.I am fetching the count(*)+1 value from database and assigning to my html text box but its showing as null.can i get some help? Code: <body> <%@page import="java.sql.*"%> <%! String no; %> <% try{ Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); Connection con = DriverManager.getConnection("jdbc:odbc:pd"); ResultSet rs = null; Statement st = con.createStatement(); String sql = ("select count(*)+1 from products"); st.executeUpdate(sql); while (rs.next()) { no=rs.getString("count(*)+1"); } rs.close(); st.close(); con.close(); } catch(Exception e){} %> <Form name='Form1' action="productcode.jsp" method="post"> <table width="1024" border="0"> <tr> <td width="10">&nbsp;</td> <td width="126">Add Product: </td> <td width="277">&nbsp;</td> <td width="583">&nbsp;</td> </tr> <tr> <td>&nbsp;</td> <td>Product Id:</td> <td><label> <input type="text" name="id" value="<%= no%>"/> </label></td> <td>&nbsp;</td> .... and so on

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  • DateTimeAxis - set Label to display Date + Time

    - by Jay
    Hi, Is there a way in flex 3 chart component to display both the date and time using horizontal DateTimeAxis? Currently the DateTimeAxis element has an attribute dataunits which allows to set the value to any of "milliseconds|seconds|minutes|hours|days|weeks|months|years" but I want to display the label as "2009/09/15 06:00:00" which includes the day and the time too. Here is the sample that i'm using [Bindable] public var deck:ArrayCollection = new ArrayCollection([ {date:"2009-09-15 06:00:00", close:42.71}, {date:"2009-09-16 06:15:00", close:42.99} ]); public function myParseFunction(s:String):Date { var sDate = s.substring(0,s.indexOf(" ")); var sTime = s.substring(s.indexOf(" ")); var aDate = sDate.split("-"); var aTime = sTime.split(":"); return new Date(aDate[0],(aDate[1]*1-1),aDate[2],aTime[0],aTime[1],aTime[2],0); } ]] Thanks in advance.

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  • QListWidget drag and drop items disappearing from list

    - by ppalasek
    Hello, I'm having trouble implementing a QListWidget with custom items that can be reordered by dragging and dropping. The problem is when I make a fast double click (a very short drag&drop) on an item, the item sometimes disappears from the QListWidget. This is the constructor for my Widget: ListPopisiDragDrop::ListPopisiDragDrop(QWidget *parent) : QListWidget(parent) { setSelectionMode(QAbstractItemView::SingleSelection); setDragEnabled(true); viewport()->setAcceptDrops(true); setDefaultDropAction(Qt::MoveAction); setDropIndicatorShown(true); setDragDropMode(QAbstractItemView::InternalMove); } also the drop event: void ListPopisiDragDrop::dropEvent(QDropEvent *event){ int startRow=currentIndex().row(); QListWidget::dropEvent(event); int endRow=currentIndex().row(); //more code... } Custom items are made by implementing paint() and sizeHint() functions from QAbstractItemDelegate. When the problem with disappearing items happens, the dropEvent isn't even called. I really don't know what is happening and if I'm doing something wrong. Any help is appreciated. Thanks! Edit: I'm running the application on a Symbian S60 5th edition phone. Edit2: If I add this line to the constructor: setDragDropOverwriteMode(true); the item in the list still disappears, but an empty row stays in it's place.

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  • jQuery + Dialog Form Validation

    - by Panther24
    Hi, I have a jQuery Dialog form and on submit I'm trying to validate the fields. I'm using http://docs.jquery.com/Plugins/Validation to validate. In this I'm facing an issue, the validate function is not being called. I'm posting some snippet of my code $("#register-dialog-form").dialog({ autoOpen: false, height: 350, width: 450, modal: true, buttons: { 'Register': function() { $("#registerFrm").validate({ rules: { accountid: "required", name: { required: true, minlength: 5 }, username: { required: true, minlength: 5 }, password: { required: true, minlength: 5 } }, messages: { firstname: "Please enter your firstname", accountid: "Please enter the lastname", name: "Please enter a user friendly name", username: { required: "Please enter a username", minlength: jQuery.format("Enter at least {0} characters") }, password: { required: "Please provide a password", minlength: jQuery.format("Password must be at least {0} characters long") } } }); //****************** //TODO: Need to submit my form here //****************** $(this).dialog('close'); }, Cancel: function() { $(this).dialog('close'); } }, close: function() { //$('registerFrm').clearForm(); } }); Can someone please tell me what I'm doing wrong here. I've also tried to put the validation into $(document).ready(function() {}, but with no success. Here is the html code <div id="register-dialog-form" title="Register Account - Master" align="center" style="display: none"> <s:form name="registerFrm" id="registerFrm" action="registermaster" method="POST"> <table width="90%" border="0" class="ui-widget"> <tr> <td> <s:textfield label="Account Id" name="accountid" id="accountid" cssClass="text ui-widget-content ui-corner-all" /> </td> </tr> <tr> <td> <s:textfield label="Name" name="name" id="name" cssClass="text ui-widget-content ui-corner-all" /> </td> </tr> <tr> <td> <s:textfield label="Username" name="username" id="username" cssClass="text ui-widget-content ui-corner-all" /> </td> </tr> <tr> <td> <s:password label="Password" name="password" id="password" cssClass="text ui-widget-content ui-corner-all" /> </td> </tr> </table> </s:form> </div><!--End of RegisterAcc form-->

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  • What's the proper way to use sqlite at xCode?

    - by Elliot Chen
    Hi, Experts: Can you please give some suggestions on sqlite using at xcode? Within my application, I use a sqlite DB to store all local data. Two methods can be used to retrieve those data during running time. 1, Load all the data into memory at initialization stage. (More memory used, less DB open/close operation needed) 2, Read corresponding records when necessary, free the occupied memory after using. (Good habit for memory using, but much DB open/close operations needs). I prefer to use method 2, but not sure whether too many DB opening/closing operations could affect app's efficiency. Or do you think I can 'upgrade' method 2 by opening DB when app launches and closing DB when app quits? Thanks for your suggestions very much!

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  • Error with connection in my database servlet

    - by Zerobu
    Hello, I am writing a Database servlet, all seems well except that there seems to be an error in my connection import java.io.IOException; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import java.util.ArrayList; import javax.servlet.RequestDispatcher; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class DBServlet3 extends HttpServlet { private static final long serialVersionUID = 1L; @Override public void init() throws ServletException { super.init(); try { String jdbcDriverClass= getServletContext().getInitParameter( "jdbcDriverClass" ); if (jdbcDriverClass == null) throw new ServletException( "Could not find jdbcDriverClass initialization parameter" ); Class.forName( jdbcDriverClass ); } catch (ClassNotFoundException e) { throw new ServletException( "Could not load JDBC driver class", e ); } } @Override protected void doGet( HttpServletRequest request, HttpServletResponse response ) throws ServletException, IOException { RequestDispatcher dispatcher= request.getRequestDispatcher( "/db.jsp" ); ServletContext application= getServletContext(); ArrayList<String> names= new ArrayList<String>(); try { Connection connection= null; Statement statement= null; ResultSet results= null; try { String jdbcUrl= application.getInitParameter( "jdbcUrl" ); String jdbcUser= application.getInitParameter( "jdbcUser" ); String jdbcPassword= application.getInitParameter( "jdbcPassword" ); connection= DriverManager.getConnection( jdbcUrl, jdbcUser, jdbcPassword ); statement= connection.createStatement(); results= statement.executeQuery( "SELECT * FROM students" ); while (results.next()) { String name= results.getString( "name" ); names.add( name ); } } finally { if (results != null) results.close(); if (statement != null) statement.close(); if (connection != null) connection.close(); } } catch (SQLException e) { throw new ServletException( e ); } request.setAttribute( "names", names ); dispatcher.forward( request, response ); } @Override protected void doPost( HttpServletRequest request, HttpServletResponse response ) throws ServletException, IOException { String sql= "INSERT INTO students VALUES (" + request.getParameter( "id" ) + ", '" + request.getParameter( "name" ) + "')"; sql= "INSERT INTO students VALUES (?, ?, ?, ?)"; PreparedStatement statement= connection.prepareStatement( sql ); //error on this line statement.setString( 1, request.getParameter( "id" ) ); statement.setString( 2, request.getParameter( "name" ) ); } }

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