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Thread: JavaPos Applet

  1. #1
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    Question JavaPos Applet

    Hi everybody,
    i've developed a simple Applet that create a PosPrinter instance.
    To use javaPos i need a property file and an xml. I've added these to my src folder of my Ecplipse project and when i run the applet from Eclipse works fine.
    But when i try to run the applet frm a web page, through a jnlp file, i get an Exception in the init method "javapos/res/jpos.properties file not found".
    In the jnlp file i'm able to ref other external jar, but i don't know how to add external folder.
    How can i fix this?


  2. #2
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    Default Re: JavaPos Applet

    Can the files be moved into the jar file?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: JavaPos Applet

    Yes, i get the two files inside the jar. I've also tried to clean java cache to remove previous applet version.

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    Default Re: JavaPos Applet

    Is the code written to access the files while they are in the jar file? It can't use file I/O methods. It must treat the files as resources.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: JavaPos Applet

    Here's a very short article that contains the key line of code that you'll need to read a file that has been packaged up in your applet jar file: Accessing a resource within a .jar. Internet search term used: "read file in jar"

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    Default Re: JavaPos Applet

    Hello
    i've readed a lot of example. Now this is my code:

    public class adgPrinterAppletXml extends Applet implements ActionListener, EventCallbacks{
     
    	private static final long serialVersionUID = 1L;
    		SimpleEntry temp;
    	public void init(){
    		Properties p = new Properties();
     
                    try {
    			p.load(getClass().getClassLoader().getResourceAsStream("jpos/res/jpos.properties"));
    		} catch (IOException e2) {
    			e2.printStackTrace();
    		}
    		System.out.println("Getting Service Manager");
     
    		WNJposServiceInstanceFactory factory = new WNJposServiceInstanceFactory();
     
    		SimpleXmlRegPopulator xmlReg = new SimpleXmlRegPopulator();
    		;
            xmlReg.load("wincor.jpos17.THxxx.xml");
            System.out.println("3");
            @SuppressWarnings("unchecked")
            Enumeration<SimpleEntry> e = xmlReg.getEntries();
            while(e.hasMoreElements()){
    	            temp= e.nextElement();
            }
            System.out.println(temp.getLogicalName());
            try {
    			WNPOSPrinterTH230 printer = (WNPOSPrinterTH230)factory.createInstance("WN_TH230_U1_USB", temp);
     
    			printer.open("WN_TH230_U1_USB",this);
     
                printer.claim(0);
     
                printer.setDeviceEnabled(true);
     
                printer.printBarCode(POSPrinterConst.PTR_S_RECEIPT, "7766554433222", 104, 60, 1 ,2 ,-13);
     
                printer.cutPaper(100);
    		} catch (JposException e1) {
    			// TODO Auto-generated catch block
    			e1.printStackTrace();
    		}
    	}
     
    }

    It worked fine in eclipse whe i run the class as an applet. The properties file is inside sources.
    When export as jar and run from a browser i get :
    access denied ("java.util.PropertyPermission" "*" "read,write")
             jpos/res/jpos.properties not found

    if i autosign the jar i get the same error and in addition:
    Missing Permissions manifest attribute for: file:/C:/Documents%20and%20Settings/Administrator/Desktop/applet/adg.jar
    Missing Codebase manifest attribute for: file:/C:/Documents%20and%20Settings/Administrator/Desktop/applet/adg.jar
    Missing Permissions manifest attribute for: file:/C:/Documents%20and%20Settings/Administrator/Desktop/applet/adg.jar
    Missing Codebase manifest attribute for: file:/C:/Documents%20and%20Settings/Administrator/Desktop/applet/adg.jar
    Missing Permissions manifest attribute for: file:/C:/Documents%20and%20Settings/Administrator/Desktop/applet/adg.jar
    Missing Codebase manifest attribute for: file:/C:/Documents%20and%20Settings/Administrator/Desktop/applet/adg.jar
    Missing Permissions manifest attribute for: file:/C:/Documents%20and%20Settings/Administrator/Desktop/applet/adg.jar
    Missing Codebase manifest attribute for: file:/C:/Documents%20and%20Settings/Administrator/Desktop/applet/adg.jar
    Missing Permissions manifest attribute for: file:/C:/Documents%20and%20Settings/Administrator/Desktop/applet/adg.jar
    Missing Codebase manifest attribute for: file:/C:/Documents%20and%20Settings/Administrator/Desktop/applet/adg.jar

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    Default Re: JavaPos Applet

    Quote Originally Posted by tleaf View Post
    ...
    p.load(getClass().getClassLoader().getResourceAsStream("jpos/res/jpos.properties"));
    ...

    It worked fine in eclipse whe i run the class as an applet. The properties file is inside sources.
    When export as jar and run from a browser i get :
    access denied ("java.util.PropertyPermission" "*" "read,write")
             jpos/res/jpos.properties not found
    In order to check if jpos.properties has been packaged up into the right location within the jar file, please run
    jar -tf adg.jar
    (I'm assuming your JDK's bin directory is already in your system PATH environment variable. If not, run \absolute_path_to_jdk's_bin_directory\jar -tf adg.jar.)

    Quote Originally Posted by tleaf View Post
    if i autosign the jar i get the same error and in addition:
    How did you "autosign" the jar? Also, was it signed using a self-signed certificate, or with a trusted CA-signed certificate?

    Quote Originally Posted by tleaf View Post
    Missing Permissions manifest attribute for: file:/C:/Documents%20and%20Settings/Administrator/Desktop/applet/adg.jar
    Missing Codebase manifest attribute for: file:/C:/Documents%20and%20Settings/Administrator/Desktop/applet/adg.jar
    Missing Permissions manifest attribute for: file:/C:/Documents%20and%20Settings/Administrator/Desktop/applet/adg.jar
    This applies to signed applet jars only. The following web page may be of help:

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