使用串行端口阵列列表中的数据

Question

好吧，我迷路了，现在甚至不知道该怎么谷歌。

我正在使用JSSC从串行端口读取数据。

当我打印为支票图时，数据被抬起。它打印几行精细，然后按单个字符打印。如果我使用"printf"，它可以正常打印

$GPRMC,212729.000,A,3805.8438,N,08459.5498,W,0.00,280.71,031117,,,D*73
$GPVTG,280.71,T,,M,0.00,N,0.0,K0
F

$
G
P
G

这是使用以下命令的 for 循环 im：

  for (String s: data2) { 
                System.out.println(s);
                 }

其他代码：

String getData =  serialPort.readString(event.getEventValue());
List<String> data2 = new ArrayList<String>(Arrays.asList(getData.split("$")));

如果我只是打印它，我会对printf很好。

我需要用 $ 符号将每个句子分开。

任何帮助将不胜感激。

    import jssc.SerialPort; 
    import jssc.SerialPortEvent; 
    import jssc.SerialPortEventListener; import jssc.SerialPortException;
    import java.util.Arrays;
    import java.util.ArrayList;
    import java.util.List;

    public class test {
    static SerialPort serialPort;
    public static void main(String[] args) {
        serialPort = new SerialPort("COM!"); 
        try {
            serialPort.openPort();//Open ports
            serialPort.setParams(4800, 8, 1, 0);//Set params
          int mask = SerialPort.MASK_RXCHAR + SerialPort.MASK_CTS + SerialPort.MASK_DSR;//Prepare mask
           serialPort.setEventsMask(mask);//Set mask
           serialPort.addEventListener(new SerialPortReader());//Add SerialPortEventListener

        }
        catch (SerialPortException ex) {
            System.out.println(ex);
        }
}public void serialEvent(SerialPortEvent event) {
          //  if(event.isRXCHAR()){//If data is available
           //    if(event.getInputBufferBytesCount()  > 1){//Check bytes count in the input buffer
                    //Read data, if 10 bytes available 
                    try {

                          String getdata =  serialPort.readString(event.getEventValue());
                          String delimiter = "$";
                      List<String> data2 = new ArrayList<String>(Arrays.asList(getdata.split("$")));

                   for (String s: data2) { 
                    System.out.printf("NEW" + s);
                     }
                    }
                    catch (SerialPortException ex) {
                    }

每个请求更新的代码

    import jssc.SerialPort; 
import jssc.SerialPortEvent; 
import jssc.SerialPortEventListener; import jssc.SerialPortException;
//import java.util.Arrays;
//import java.awt.List;
//import java.util.Base64;
//import java.io.BufferedReader;
//import java.io.ByteArrayInputStream;
//import java.io.InputStream;
//import java.io.InputStreamReader;
//import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.io.IOException;
import java.lang.*;
//import static java.util.Arrays.asList;
//import java.util.List;
//import java.util.stream.Collectors;
//import org.apache.commons.lang3.StringUtils;

public class test {
static ArrayList<String> data = new ArrayList<String>();
static SerialPort serialPort;
public static void main(String[] args) {
    serialPort = new SerialPort("COM1"); 
    try {
        serialPort.openPort();//Open ports
        serialPort.setParams(4800, 8, 1, 0);//Set params
      int mask = SerialPort.MASK_RXCHAR + SerialPort.MASK_CTS + SerialPort.MASK_DSR;//Prepare mask
       serialPort.setEventsMask(mask);//Set mask
       serialPort.addEventListener(new SerialPortReader());//Add SerialPortEventListener

    }
    catch (SerialPortException ex) {
        System.out.println(ex);
    }
}
/*
 * In this class must implement the method serialEvent, through it we learn about 
 * events that happened to our port. But we will not report on all events but only 
 * those that we put in the mask. In this case the arrival of the data and change the 
 * status lines CTS and DSR
 */
static class SerialPortReader implements SerialPortEventListener {
    public void serialEvent(SerialPortEvent event) {
    //   if(event.isRXCHAR()){//If data is available
      //     if(event.getEventValue() < 577){//Check bytes count in the input buffer
                //Read data, if 10 bytes available 
                try {
                    String getdata =  serialPort.readString(event.getEventValue());
                String[] parts= getdata.split("$");
                data.set(data.size() - 1, data.get(data.size() - 1) + parts[0]);
                for (int i=1; i<parts.length; i++) {
                    data.add(parts[i]);
                }
                }
                catch (SerialPortException ex) {                  
             }
       }        
}
}

Answer 1

您的serialEvent方法只是一个为每个SerialPortEvent触发的EventListener，但不能保证数据会"完整"到达，因此您应该在类级别声明List，获取到达的数据并以适当的方式存储它。像这样：

public class test {
    // ...
    static List<String> data = new ArrayList<String>();
    // ...
    public void serialEvent(SerialPortEvent event) {
        try {
            String getdata =  serialPort.readString(event.getEventValue());
            // String.split takes a regular expression. In regular expressions,
            // the dollar sign ($) by it's own means the end of the line, so you
            // have to escape it using a backslash (), but since it's a string
            // you have to escape that one with another backslash so it get's
            // passed correctly, thus searching for the dollar sign and not the
            // end of the line
            String[] parts = getdata.split("\$");
            // Append whatever is before the first dollar sign to the last item
            // in your data
            if(!data.isEmpty()){
                data.set(data.size() - 1, data.get(data.size() - 1) + parts[0]);
            }
            // Append the rest of the parts in your data
            for (int i=1; i<parts.length; i++) {
                data.add(parts[i]);
            }
        }
        catch (SerialPortException ex) {}
        // ...
    }
    // ...
}