我正在尝试从MS Windows命令提示符执行EPSON提供的带有Java POS ADK的示例程序（使用NetBeans构建为.jar文件）。显示UI屏幕后，我在命令提示符下面出现错误
（点击“打印”按钮后，从NetBeans IDE正常工作并在EPSON TM-T88V打印机上打印） -
jpos.JposException: Could not create an instance.
at jp.co.epson.upos.core.v1_14_0001.pntr.CommonPrinterService.createComm
Instance(CommonPrinterService.java:2891)
at jp.co.epson.upos.core.v1_14_0001.pntr.CommonPrinterService.open(Commo
nPrinterService.java:1311)
at jpos.BaseJposControl.open(Unknown Source)
at helloworldapp.Step1Frame.processWindowEvent(Step1Frame.java:81)
at java.awt.Window.processEvent(Window.java:2013)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionP
rivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionP
rivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionP
rivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre
ad.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.
java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
以下是完整的源代码（两个类文件）
Step1Main.java
package printersample_step1;
import javax.swing.UIManager;
import java.awt.*;
public class Step1Main {
/**The application program starts from this point.*/
public Step1Main() {
Step1Frame frame = new Step1Frame();
//For center the window on the display.
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension frameSize = frame.getSize();
frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
frame.setVisible(true);
}
/**The method "Main" */
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}
catch(Exception e) {
e.printStackTrace();
}
new Step1Main();
}
}
Step1Frame.java
/* Step 1 Print as "Hello JavaPOS"*/
//A string is sent by using the method "printNormal", and it is printed.
package printersample_step1;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import jpos.*;
/**
* Outline The code for starting service and the code
* for printing are described.
* @author s.muroga
* @version 1.00 (2001.04.24)
*/
public class Step1Frame extends JFrame {
POSPrinterControl114 ptr = (POSPrinterControl114)new POSPrinter();
JPanel contentPane;
JPanel jPanel_reciept = new JPanel();
TitledBorder titledBorder1;
GridBagLayout gridBagLayout1 = new GridBagLayout();
GridBagLayout gridBagLayout2 = new GridBagLayout();
JButton jButton_Print = new JButton();
/**Constract "Frame"*/
public Step1Frame() {
enableEvents(AWTEvent.WINDOW_EVENT_MASK);
try {
jbInit();
}
catch(Exception e) {
e.printStackTrace();
}
}
/**Form the component*/
private void jbInit() throws Exception {
//setIconImage(Toolkit.getDefaultToolkit().createImage(Step1Frame.class.getResource("[Your Icon]")));
contentPane = (JPanel) this.getContentPane();
titledBorder1 = new TitledBorder(BorderFactory.createEtchedBorder(Color.white,new Color(134, 134, 134)),"Receipt");
contentPane.setLayout(gridBagLayout1);
this.setSize(new Dimension(300, 180));
this.setTitle("Step 1 Print \"Hello JavaPOS\"");
jPanel_reciept.setLayout(gridBagLayout2);
jPanel_reciept.setBorder(titledBorder1);
jButton_Print.setText("Print");
jButton_Print.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
jButton_Print_actionPerformed(e);
}
});
contentPane.add(jPanel_reciept, new GridBagConstraints(0, 0, 1, 1, 0.0, 0.0
,GridBagConstraints.CENTER, GridBagConstraints.NONE, new Insets(15, 0, 0, 0), 20, 20));
jPanel_reciept.add(jButton_Print, new GridBagConstraints(0, 0, 1, 1, 0.0, 0.0
,GridBagConstraints.CENTER, GridBagConstraints.NONE, new Insets(5, 10, 5, 10), 130, 0));
}
/**
* Outline The processing code required in order to enable
* or to disable use of service is written here.
* @exception JposException This exception is fired toward the failure of
* the method which JavaPOS defines.
*/
/**When the window was closed*/
protected void processWindowEvent(WindowEvent e) {
super.processWindowEvent(e);
if (e.getID() == WindowEvent.WINDOW_CLOSING) {
this.closing();
}
/**When the window open*/
else if (e.getID() == WindowEvent.WINDOW_OPENED) {
// JavaPOS's code for Step1
try {
//Open the device.
//Use the name of the device that connected with your computer.
ptr.open("POSPrinter");
//Get the exclusive control right for the opened device.
//Then the device is disable from other application.
ptr.claim(1000);
//Enable the device.
ptr.setDeviceEnabled(true);
}
catch(JposException ex) {
}
}
// JavaPOS's code for Step1--END
}
//***********************Button*************************************************
/**
* Outline The code for using the most standard method "PrintNormal"
* to print is described.
*/
void jButton_Print_actionPerformed(ActionEvent e) {
// JavaPOS's code for Step1
try{
//printNormal(int station, String data)
//A string is sent by using the method "printNormal", and it is printed.
// "\n" is the standard code for starting a new line.
// When the end of the line have no "\n",printing by
// using the method "printNormal" doesn't start, may be.
ptr.printNormal(POSPrinterConst.PTR_S_RECEIPT,"Hello JavaPOS\n");
}
catch(JposException ex){
}
// JavaPOS's code for Step1--END
}
//***********************Method*************************************************
/**
* Outline The code to finish a service.
*/
void closing(){
// JavaPOS's code for Step1
try{
//Cancel the device.
ptr.setDeviceEnabled(false);
//Release the device exclusive control right.
ptr.release();
//Finish using the device.
ptr.close();
}
catch(JposException ex){
}
// JavaPOS's code for Step1--END
System.exit(0);
}
}
从命令提示符运行它时所缺少的内容（以管理员权限运行）。还需要其他许可吗？我无法在此特定方案中找到任何文档，例如从NetBeans正常运行但从命令提示符处抛出异常。我在MS Windows 8.1系统上运行它。
答案 0 :(得分：0)
尝试一下：
安装javaPOS版本。 1.14.6
在Windows 10或Windows 8.1副本上：
来自
C：\ Program Files \ EPSON \ JavaPOS \ bin \
到
C：\ Program Files \ Java \ jre1.8.0.171 \ bin \
从
将lib导入到您的项目中C：\ Program Files \ EPSON \ JavaPOS \ lib \
运行javaPOS应用程序。