java实现串口通信COM3，读取扫码枪信息

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java实现串口通信COM3，读取扫码枪信息

附上码云地址
https://gitee.com/guyuanman/scanproject.git
附上码云地址

当你的设备（扫码枪）连接到电脑上的时候，在设备管理器中可以看到串口

我们只需要打开对应的串口捕捉就行

我这里写死了，开启COM3的串口
其实就几个类
PortInit 项目启动就扫描串口
MyLister 监听开启的串口
PortController 开启关闭串口

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.7.6</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.wl</groupId><artifactId>myclocksource</artifactId><version>0.0.1-SNAPSHOT</version><name>myclocksource</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</artifactId></dependency><!--        &lt;!&ndash; https://mvnrepository.com/artifact/org.rxtx/rxtx &ndash;&gt;-->
<!--        <dependency>-->
<!--            <groupId>org.rxtx</groupId>-->
<!--            <artifactId>rxtx</artifactId>-->
<!--            <version>2.1.7</version>-->
<!--        </dependency>--><!--管理web请求的配置（不加的则无法等待浏览器的请求）--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.rxtx</groupId><artifactId>rxtx</artifactId><version>2.2</version><scope>system</scope><systemPath>${project.basedir}/src/main/resources/lib/RXTXcomm.jar</systemPath></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope><exclusions><exclusion><groupId>org.junit.vintage</groupId><artifactId>junit-vintage-engine</artifactId></exclusion></exclusions></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

PortInit

package com.wl.myclocksource.init;import com.wl.myclocksource.lister.MyLister;
import com.wl.myclocksource.utils.SerialPortUtil;
import gnu.io.*;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.stereotype.Component;import java.util.ArrayList;
import java.util.Enumeration;
import java.util.TooManyListenersException;/*** @author liwangwang* @site Liwangwang321@163.com* @create 2020-11-10 15:23*/
@Component
public class PortInit implements ApplicationRunner {public  static  SerialPort serialPort =null;@Value("${portname}")private String portname;@Overridepublic void run(ApplicationArguments args) throws Exception {System.out.println("当前portname:"+portname);TestA();//查看所有串口SerialPortUtil serialPortUtil = SerialPortUtil.getSerialPortUtil();ArrayList<String> port = serialPortUtil.findPort();port.forEach(u-> System.out.println("发现："+u.toString()));}private void TestA(){try {String str = System.getProperty("sun.arch.data.model");System.out.println("This JVM is " + str + "-bit");} catch (Exception e) {System.out.println(e.getMessage());}}
}

MyLister

package com.wl.myclocksource.lister;import com.wl.myclocksource.init.PortInit;
import com.wl.myclocksource.utils.SerialPortUtil;
import gnu.io.SerialPortEvent;
import gnu.io.SerialPortEventListener;import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Date;
import java.util.regex.Matcher;
import java.util.regex.Pattern;/*** @author liwangwang* @site Liwangwang321@163.com* @create 2020-11-10 13:47*/
public class MyLister implements SerialPortEventListener {private  String str = "";private  int strCount = 0;private  Pattern pattern= Pattern.compile("\\\\G\\d+");@Overridepublic void serialEvent(SerialPortEvent arg0) {// TODO Auto-generated method stub//对以下内容进行判断并操作/*如果这个不行的话就换这个参考：https://blog.csdn.net/l13020227067/article/details/80693087BI -通讯中断CD -载波检测CTS -清除发送DATA_AVAILABLE -有数据到达DSR -数据设备准备好FE -帧错误OE -溢位错误OUTPUT_BUFFER_EMPTY -输出缓冲区已清空PE -奇偶校验错RI -　振铃指示*///switch多个，if单个if (arg0.getEventType() == SerialPortEvent.DATA_AVAILABLE) {strCount++;SerialPortUtil serialPortUtil = SerialPortUtil.getSerialPortUtil();byte[] bytes = serialPortUtil.readFromPort(PortInit.serialPort);
//            System.out.println(PortInit.serialPort);String byteStr = new String(bytes);System.out.println("===========start===========");System.out.println(new Date() + "【读到的字节数组】：-----" + byteStr);String needData = printHexString(bytes);System.out.println(new Date() + "【字节数组转字符串】：-----" + needData);System.out.println(new Date() +"【16进制字符串转字符串】："+hexStringToString(needData));System.out.println("===========end===========");str+=byteStr;if(strCount==2){System.out.println("=========最后得到的时间字符串："+str);if(pattern.matcher(str).lookingAt()){setLiunxDate(str);}strCount=0;str = "";}}}private  void setLiunxDate(String date){
//        String d = "\\G202012023122845022";System.out.println(date);String time = date.replaceAll(" ","");
//        System.out.println("清理后的时间格式："+time);String year = time.substring(2,6);String month = time.substring(6,8);String day = time.substring(8,10);
//        System.out.println("年："+year);
//        System.out.println("月："+month);
//        System.out.println("日："+day);String hour = time.substring(11,13);String min = time.substring(13,15);String sec = time.substring(15,17);
//        System.out.println("分："+min);
//        System.out.println("时："+hour);
//        System.out.println("秒："+sec);String osName = System.getProperty("os.name").toLowerCase();System.out.println("osName:"+osName);String rq = year+"-"+month+"-"+day;String sj = hour+":"+min+":"+sec;System.out.println("日期："+rq);System.out.println("时间："+sj);try {System.out.println("shell脚本启动==========");//通过exec 来运行Linux shell脚本：在这个demo中 setDate.sh 是和 LinuxTimeSetter 在同一个文件夹中String[] command = new String[]{"sh","./date.sh",rq,sj};Process proc = Runtime.getRuntime().exec(command);BufferedReader br = new BufferedReader(new InputStreamReader(proc.getInputStream()));String text = null;//输出操作结果while ((text = br.readLine()) != null) {System.out.println("操作结果："+text);}} catch (IOException e) {e.printStackTrace();}};// 字节数组转字符串private String printHexString(byte[] b) {StringBuffer sbf = new StringBuffer();for (int i = 0; i < b.length; i++) {String hex = Integer.toHexString(b[i] & 0xFF);if (hex.length() == 1) {hex = '0' + hex;}sbf.append(hex.toUpperCase() + " ");}return sbf.toString().trim();}/*** 16进制转换成为string类型字符串* @param s* @return*/public static String hexStringToString(String s) {if (s == null || s.equals("")) {return null;}s = s.replace(" ", "");byte[] baKeyword = new byte[s.length() / 2];for (int i = 0; i < baKeyword.length; i++) {try {baKeyword[i] = (byte) (0xff & Integer.parseInt(s.substring(i * 2, i * 2 + 2), 16));} catch (Exception e) {e.printStackTrace();}}try {s = new String(baKeyword, "UTF-8");new String();} catch (Exception e1) {e1.printStackTrace();}return s;}}

PortController

package com.wl.myclocksource.controller;import com.wl.myclocksource.init.PortInit;
import com.wl.myclocksource.lister.MyLister;
import com.wl.myclocksource.utils.SerialPortUtil;
import gnu.io.SerialPort;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;/*** @Author: wangwang* @Date: 2020/11/18 13:49*/
@RestController
@RequestMapping("api")
public class PortController {@Value("${portname}")private String portname;private   ResponseEntity responseEntity = null;@RequestMapping("start")public ResponseEntity start(){try {SerialPortUtil serialPortUtil = SerialPortUtil.getSerialPortUtil();//打开该对应portname名字的串口PortInit.serialPort = serialPortUtil.openPort("COM3", 9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);//给对应的serialPort添加监听器serialPortUtil.addListener(PortInit.serialPort,new MyLister());responseEntity = new ResponseEntity("开启成功",HttpStatus.OK);}catch (Exception e){responseEntity = new ResponseEntity("开启失败",HttpStatus.NO_CONTENT);}return responseEntity;}@RequestMapping("stop")public ResponseEntity stop(){try {SerialPortUtil serialPortUtil = SerialPortUtil.getSerialPortUtil();serialPortUtil.removeListener(PortInit.serialPort,new MyLister());serialPortUtil.closePort(PortInit.serialPort);responseEntity = new ResponseEntity("关闭成功",HttpStatus.OK);}catch (Exception e){responseEntity = new ResponseEntity("关闭失败",HttpStatus.NO_CONTENT);}return responseEntity;}}

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