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【Java】 java实现串口pos机打印

作者:dinphi / 发布于2014/8/4/ 1388

1、首先下载Javax.comm 下载地址：http://mdubuc.freeshell.org/Jolt/javacomm20-win32.zip 2、将文件win32comm.dll拷贝到%JAVA_HOME%\bin 3、在项目中导入comm.jar


	import java.io.IOException;
	import java.io.InputStream;
	import java.io.OutputStream;
	import java.util.Enumeration;
	import java.util.TooManyListenersException;

	import javax.comm.CommPortIdentifier;
	import javax.comm.PortInUseException;
	import javax.comm.SerialPort;
	import javax.comm.SerialPortEvent;
	import javax.comm.SerialPortEventListener;
	import javax.comm.UnsupportedCommOperationException;

	public class PrintTest implements SerialPortEventListener {
	InputStream inputStream; // 从串口来的输入流
	OutputStream outputStream;// 向串口输出的流
	SerialPort serialPort; // 串口的引用
	CommPortIdentifier portId;

	public PrintTest(Enumeration portList, String name) {
	 while (portList.hasMoreElements()) {
	 CommPortIdentifier temp = (CommPortIdentifier) portList
	 .nextElement();
	 if (temp.getPortType() == CommPortIdentifier.PORT_SERIAL) {// 判断如果端口类型是串口
	 if (temp.getName().equals(name)) { // 判断如果端口已经启动就连接
	 portId = temp;
	 }
	 }
	 }
	 try {
	 serialPort = (SerialPort) portId.open("My" + name, 2000);
	 } catch (PortInUseException e) {

	 }
	 try {
	 inputStream = serialPort.getInputStream();
	 outputStream = serialPort.getOutputStream();
	 } catch (IOException e) {
	 }
	 try {
	 serialPort.addEventListener(this); // 给当前串口天加一个监听器
	 } catch (TooManyListenersException e) {
	 }
	 serialPort.notifyOnDataAvailable(true); // 当有数据时通知
	 try {
	 serialPort.setSerialPortParams(9600, SerialPort.DATABITS_8, // 设置串口读写参数
	 SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
	 } catch (UnsupportedCommOperationException e) {
	 }
	 System.out.println(portId);
	 System.out.println(serialPort);
	}

	public void serialEvent(SerialPortEvent event) {
	 switch (event.getEventType()) {
	 case SerialPortEvent.BI:
	 case SerialPortEvent.OE:
	 case SerialPortEvent.FE:
	 case SerialPortEvent.PE:
	 case SerialPortEvent.CD:
	 case SerialPortEvent.CTS:
	 case SerialPortEvent.DSR:
	 case SerialPortEvent.RI:
	 case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
	 break;

	 case SerialPortEvent.DATA_AVAILABLE:// 当有可用数据时读取数据,并且给串口返回数据
	 byte[] readBuffer = new byte[20];

	 try {
	 while (inputStream.available() > 0) {
	 System.out.println(inputStream.available());
	 int numBytes = inputStream.read(readBuffer);
	 System.out.println(numBytes);
	 }
	 System.out.println(new String(readBuffer).trim());
	 } catch (IOException e) {
	 e.printStackTrace();
	 }
	 break;
	 }
	}

	public void send(String content) {
	 try {
	 outputStream.write((content).getBytes("gbk"));
	 // outputStream.flush();
	 } catch (IOException e) {
	 e.printStackTrace();
	 }
	}

	public void ClosePort() {
	 System.out.println(serialPort);
	 if (serialPort != null) {
	 serialPort.close();
	 }
	}

	}

	

	

	

	import java.util.Enumeration;
	
	import javax.comm.CommPortIdentifier;
	
	
	public class Test {
	
	 public static void main(String[] args) throws InterruptedException {
	 Enumeration portList = CommPortIdentifier.getPortIdentifiers(); //得到当前连接上的端口
	
	 PrintTest comm3 = new PrintTest(portList,"COM4");
	 int lineOffset=5;
	 StringBuffer cmd_sb=new StringBuffer();
	 cmd_sb.append(0x1b+" DOWNLOAD \"XJMEI.BAS\"\r");
	 cmd_sb.append("CLS\r");
	 cmd_sb.append("SET COUNTER @1 1\r");
	 cmd_sb.append("@1=\"xjmei\"\r");
	 cmd_sb.append("TEXT 60,10,\"3\",0,1,1,@1\r");
	 cmd_sb.append("PRINT 1,1\r");
	 cmd_sb.append("EOP\r");
	 comm3.send(cmd_sb.toString());
	 comm3.ClosePort();
	 }
	}

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　pos机打印　　 pos机　　打印　　串口　

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