java - 包括 jpos.xml

Question

我正在制作 POS 系统，现在我正在尝试设置 pos 打印机 epson tm-t20。当我尝试打开端口时，打印机在哪里，我收到此错误消息:

jpos.JposException: Could not connect to service with logicalName = POSPrinter: Exception.message=Could not create service instance.
    at jpos.loader.simple.SimpleServiceConnection.connect(Unknown Source)
    at jpos.BaseJposControl.open(Unknown Source)
    at tisk.Step1Frame.processWindowEvent(Step1Frame.java:83)
    at java.awt.Window.processEvent(Window.java:2009)
    at java.awt.Component.dispatchEventImpl(Component.java:4861)
    at java.awt.Container.dispatchEventImpl(Container.java:2287)
    at java.awt.Window.dispatchEventImpl(Window.java:2719)
    at java.awt.Component.dispatchEvent(Component.java:4687)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:703)
    at java.awt.EventQueue.access$000(EventQueue.java:102)
    at java.awt.EventQueue$3.run(EventQueue.java:662)
    at java.awt.EventQueue$3.run(EventQueue.java:660)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
    at java.awt.EventQueue$4.run(EventQueue.java:676)
    at java.awt.EventQueue$4.run(EventQueue.java:674)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:673)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)

我已经生成了jpos.xml，但是我不知道把它放到项目的什么地方..

Answer 1

文件可以放在任何地方，但根目录是最好的起点。

    /*
     If you want to place the jpos.xml file elsewhere on your local file system then uncomment the
     following line and specify the full path to jpos.xml.

     If you want to place the jpos.xml file on a webserver for access over the internet then uncomment
     the second System.setProperty line below and specify the full URL to jpos.xml.
     */

    System.setProperty( JposPropertiesConst.JPOS_POPULATOR_FILE_PROP_NAME, "jpos.xml");
    
    System.setProperty(JposPropertiesConst.JPOS_POPULATOR_FILE_URL_PROP_NAME, "http://some-where-remote.com/jpos.xml");

error try adding this

      System.setProperty("jpos.loader.serviceManagerClass", "jpos.loader.simple.SimpleServiceManager");
      System.setProperty("jpos.config.populatorFile", "jposxml.cfg");
      System.setProperty("jpos.util.tracing.TurnOnNamedTracers", "JposServiceLoader,SimpleEntryRegistry,SimpleRegPopulator,XercesRegPopulator");
      System.setProperty("jpos.util.tracing.TurnOnAllNamedTracers", "ON");