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  • How to group a database write and spreadsheet write in single "transaction"

    - by WhyGeeEx
    I have a Java program that writes results to both a DB (SQL Server) and a spreadsheet (POI), and it would be best if neither is written to if there's an error with either. It would be a lot worse if the spreadsheet was produced and then an error happened while saving to the DB, so I'm doing the DB-write first. Even so, I'm wondering if someone knows of a way to guarantee they both succeed or fail as a unit. Thanks!

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  • RegEx Advanced : Positive lookbehind

    - by mpneuried
    This is my test-string: <img rel="{objectid:498,newobject:1,fileid:338}" width="80" height="60" align="left" src="../../../../files/jpg1/Desert1.jpg" alt="" /> I want to get each of the JSON formed Elements inbetween the rel attribute. It's working for the first element (objectid). Here is my ReqEx, which works fine: (?<=(rel="\{objectid:))\d+(?=[,|\}]) But i want to do somthing like this, which doesn't work: (?<=(rel="\{.*objectid:))\d+(?=[,|\}]) So i can parse every element of the search string. I'm using Java-ReqEx

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  • Best beginner programming language?

    - by mtwisterr
    I want to learn a simple language so I can code simple things maybe eventually a game but I don't know where to start. I can code simple things using apple script but you can't do that much with that and it only works on macs. I have a mac and a dell so something that I could code and run on both would be nice. Also all my school offers is java so if you have any ideas on how to learn the language that would be appreciated. Thanks

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  • Hibernate SessionFactory: how to configure JNDI in Tomcat?

    - by EugeneP
    that's how the session factory should be gotten: protected SessionFactory getSessionFactory() { try { return (SessionFactory) new InitialContext() .lookup("SessionFactory"); } catch (Exception e) { } } Please provide a simple solution for Tomcat6 to be able to get SessionFactory thru simple jndi lookup in Java code. What should be written in what file on the side of Tomcat ?

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  • Problem in using j2me polish with netbeans

    - by learn
    I have downloaded and installed the j2me polish successfully and i have tried to create the project but there is a reference problem showing that the specified folder does not contain the java platform but it is successfully working with normal project instead of polish which LWUIT to use?

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  • Class Cast Exception

    - by iaagty
    why do i get this exception? Map myHash = null myHash = (HashMap)Collections.synchronizedMap(new HashMap()); If i try to use this hashmap, i get java.lang.ClassCastException

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  • Send Mail through Jsp page.

    - by sourabhtaletiya
    hi friends ,i have tried alot to send mail via jsp page but i am not succeded. A error is coming javax.servlet.ServletException: 530 5.7.0 Must issue a STARTTLS command first. x1sm5029316wbx.19 <html> <head> <title>JSP JavaMail Example </title> </head> <body> <%@ page import="java.util.*" %> <%@ page import="javax.mail.*" %> <%@ page import="javax.mail.internet.*" %> <%@ page import="javax.activation.*" %> <% java.security.Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider()); Properties props = System.getProperties(); props.put("mail.smtp.starttls.enable","true"); props.put("mail.smtp.starttls.required","true"); String host = "smtp.gmail.com"; String to = request.getParameter("to"); String from = request.getParameter("from"); String subject = request.getParameter("subject"); String messageText = request.getParameter("body"); boolean sessionDebug = false; props.put("mail.smtp.host", "smtp.gmail.com"); props.put("mail.transport.protocol", "smtp"); props.put("mail.smtp.port", "25"); props.put("mail.smtp.auth", "true"); props.put("mail.debug", "true"); props.put("mail.smtp.socketFactory.port","25"); props.put("mail.smtp.starttls.enable","true"); Session mailSession = Session.getDefaultInstance(props, null); mailSession.setDebug(sessionDebug); Message msg = new MimeMessage(mailSession); props.put("mail.smtp.starttls.enable","true"); msg.setFrom(new InternetAddress(from)); InternetAddress[] address = {new InternetAddress(to)}; msg.setRecipients(Message.RecipientType.TO, address); msg.setSubject(subject); msg.setSentDate(new Date()); msg.setText(messageText); props.put("mail.smtp.starttls.enable","true"); Transport tr = mailSession.getTransport("smtp"); tr.connect(host, "sourabh.web7", "june251989"); msg.saveChanges(); // don't forget this props.put("mail.smtp.starttls.enable","true"); tr.sendMessage(msg, msg.getAllRecipients()); tr.close(); // Transport.send(msg); /* out.println("Mail was sent to " + to); out.println(" from " + from); out.println(" using host " + host + ".");*/ %> </table> </body> </html>

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  • how to develop complete software suite/platform ?

    - by fwfwfw
    here's an example of a company selling complete software suite/platform www.ql2.com/technology/platform.php i wonder how are such suite/platforms developped ? do you have to use J2EE ? i am more interested in how this company is able to produce their own proprietary WebQL language. www.automationanywhere.com/products/AAServer.htm is another similar company selling "servers"....how are such proprietary servers developped with Java technology ?

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  • Jar Store - prevent from copying

    - by Vladimir
    We are going to create Jar Store the way like App Store works, but for Java Developers. Everyone will able to submit and sell custom .jar library which solves some little problem, but solves it very good to save other developer's work time. The only undecided question is how to prevent .jar copying or publishing bought .jar to the Net.

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  • Format date in String Template email

    - by Gearóid
    I'm creating an email using String Template but when I print out a date, it prints out the full date (eg. Wed Apr 28 10:51:37 BST 2010). I'd like to print it out in the format dd/mm/yyyy but don't know how to format this in the .st file. I can't modify the date individually (using java's simpleDateFormatter) because I iterate over a collection of objects with dates. Is there a way to format the date in the .st email template?

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  • Write a PLIST file in Groovy

    - by Joe Cannatti
    I have a Groovy application for Windows and am trying to convert a Hash object to an Apple plist file. What is the best way to go about this? Seems like this is something that must already be solved in Java but I can't seem to find any examples. Thanks in advance

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  • difference between thread.start() and executor.submit(thread)

    - by Mrityunjay
    hi, i am facing a problem regarding the thread. I am having a class which implements runnable, and i can use thread.start() method on that class. My question is i have one more class java.util.concurrent.ExecutorService in which i can call executor.submit(thread).. can anyone please tell me what is the difference between thread.start() and executor.submit(thread)...

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  • cached data base

    - by radi
    hi , in my project i need a tow tables each of it has about 2000 row , i want my application to be speed so my db should load into memory (cached) when the app start and before it close the db have to be saved on the disk . i am using java and i want to use sql

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  • Password Protected Excel File

    - by dhorn
    I have an excel spreadsheet that is password-protected. I need to open this spreadsheet and read the data from it. I've been attempting to use the POI API to no avail. A Java solution would be preferred but any ideas would be helpful. Edit: Yes, I have the password. Edit2: I am unable to open it with POI with the password, I am looking for an alternate solution.

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  • How to create a custom Annotation and processing it using APT ?

    - by Dhana
    Hi, I'm new to Java Annotation. I know how to create custom annotation but I don't know how to process that Annotation to generate the dynamic code just like ejb 3.0 and hibernate does. I read some articles based on APT but no one gives the details about how to process the Annotation. Are there any tutorials with sample code for processing custom Annotations? Thanks

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  • Difference between library and native library

    - by Alvin
    Could anyone tell me the difference between library and native library in terms of java? I found the word "native library" in the following line: Type 1 - drivers that implement the JDBC API as a mapping to another data access API, such as ODBC. Drivers of this type are generally dependent on a native library, which limits their portability. The JDBC-ODBC Bridge driver is an example of a Type 1 driver. which you can found here

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  • No Secure Random Number Generators Available in JDK

    - by rwbutler
    Hi, I am currently running JDK 6 on Windows 7 and have installed the Unlimited Strength Policy Files. I wrote a Java app some time ago which used to work but now fails, giving an error message indicating that the SHA1PRNG SecureRandom is not available. I have tried printing a list of cryptographic providers available on the platform and it would appear that there are no secure random number generators available - does anyone have any idea why this might be? Many thanks in advance for your help!

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