串口编程
从网上看到的,好用,记录下,侵权的话我立马删除
maven
<!-- https://mvnrepository.com/artifact/net.sf.json-lib/json-lib -->
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<classifier>jdk15</classifier>
</dependency>
<dependency>
<groupId>org.bidib.jbidib.org.qbang.rxtx</groupId>
<artifactId>rxtxcomm</artifactId>
<version>2.2</version>
</dependency>
串口必要参数接收类
/**
* 串口必要参数接收类
* @author: LinWenLi
* @date: 2018年7月21日 下午4:30:40
*/
public class ParamConfig {
private String serialNumber;// 串口号
private int baudRate; // 波特率
private int checkoutBit; // 校验位
private int dataBit; // 数据位
private int stopBit; // 停止位
public ParamConfig() {}
/**
* 构造方法
* @param serialNumber 串口号
* @param baudRate 波特率
* @param checkoutBit 校验位
* @param dataBit 数据位
* @param stopBit 停止位
*/
public ParamConfig(String serialNumber, int baudRate, int checkoutBit, int dataBit, int stopBit) {
this.serialNumber = serialNumber;
this.baudRate = baudRate;
this.checkoutBit = checkoutBit;
this.dataBit = dataBit;
this.stopBit = stopBit;
}
public String getSerialNumber() {
return serialNumber;
}
public void setSerialNumber(String serialNumber) {
this.serialNumber = serialNumber;
}
public int getBaudRate() {
return baudRate;
}
public void setBaudRate(int baudRate) {
this.baudRate = baudRate;
}
public int getCheckoutBit() {
return checkoutBit;
}
public void setCheckoutBit(int checkoutBit) {
this.checkoutBit = checkoutBit;
}
public int getDataBit() {
return dataBit;
}
public void setDataBit(int dataBit) {
this.dataBit = dataBit;
}
public int getStopBit() {
return stopBit;
}
public void setStopBit(int stopBit) {
this.stopBit = stopBit;
}
@Override
public String toString() {
return "ParamConfig{" +
"serialNumber='" + serialNumber + '\'' +
", baudRate=" + baudRate +
", checkoutBit=" + checkoutBit +
", dataBit=" + dataBit +
", stopBit=" + stopBit +
'}';
}
}
返回封装类
import java.io.Serializable;
public class ResponseObject implements Serializable {
private static final long serialVersionUID = 1L;
/** 列表数据 */
private String data;
/** 消息状态码 */
private int code;
/** 消息内容 */
private String msg;
public String getData() {
return data;
}
public void setData(String data) {
this.data = data;
}
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
@Override
public String toString() {
return "ResponseObject{" +
"data='" + data + '\'' +
", code=" + code +
", msg='" + msg + '\'' +
'}';
}
}
读取串口工具类
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.math.BigInteger;
import java.util.Enumeration;
import java.util.TooManyListenersException;
import com.qwings.ipmgbascale.config.ParamConfig;
import gnu.io.CommPortIdentifier;
import gnu.io.PortInUseException;
import gnu.io.SerialPort;
import gnu.io.SerialPortEvent;
import gnu.io.SerialPortEventListener;
import gnu.io.UnsupportedCommOperationException;
public class SerialPortUtils implements SerialPortEventListener {
// 检测系统中可用的通讯端口类
private CommPortIdentifier commPortId;
// 枚举类型
private Enumeration<CommPortIdentifier> portList;
// RS232串口
private SerialPort serialPort;
// 输入流
private InputStream inputStream;
// 输出流
private OutputStream outputStream;
// 保存串口返回信息
private String data;
// 保存串口返回信息十六进制
private String dataHex;
/**
* 初始化串口
*
* @throws
* @author LinWenLi
* @date 2018年7月21日下午3:44:16
* @Description: TODO
* @param: paramConfig 存放串口连接必要参数的对象(会在下方给出类代码)
* @return: void
*/
@SuppressWarnings("unchecked")
public void init(ParamConfig paramConfig) {
// 获取系统中所有的通讯端口
portList = CommPortIdentifier.getPortIdentifiers();
// 记录是否含有指定串口
boolean isExsist = false;
// 循环通讯端口
while (portList.hasMoreElements()) {
commPortId = portList.nextElement();
// 判断是否是串口
if (commPortId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
// 比较串口名称是否是指定串口
if (paramConfig.getSerialNumber().equals(commPortId.getName())) {
// 串口存在
isExsist = true;
// 打开串口
try {
// open:(应用程序名【随意命名】,阻塞时等待的毫秒数)
serialPort = (SerialPort) commPortId.open(Object.class.getSimpleName(), 2000);
// 设置串口监听
serialPort.addEventListener(this);
// 设置串口数据时间有效(可监听)
serialPort.notifyOnDataAvailable(true);
// 设置串口通讯参数:波特率,数据位,停止位,校验方式
serialPort.setSerialPortParams(paramConfig.getBaudRate(), paramConfig.getDataBit(),
paramConfig.getStopBit(), paramConfig.getCheckoutBit());
} catch (PortInUseException e) {
System.out.println("端口被占用");
} catch (TooManyListenersException e) {
System.out.println("监听器过多");
} catch (UnsupportedCommOperationException e) {
System.out.println("不支持的COMM端口操作异常");
}
// 结束循环
break;
}
}
}
// 若不存在该串口则抛出异常
if (!isExsist) {
System.out.println("不存在该串口!");
}
}
/**
* 实现接口SerialPortEventListener中的方法 读取从串口中接收的数据
*/
@Override
public void serialEvent(SerialPortEvent event) {
switch (event.getEventType()) {
case SerialPortEvent.BI: // 通讯中断
case SerialPortEvent.OE: // 溢位错误
case SerialPortEvent.FE: // 帧错误
case SerialPortEvent.PE: // 奇偶校验错误
case SerialPortEvent.CD: // 载波检测
case SerialPortEvent.CTS: // 清除发送
case SerialPortEvent.DSR: // 数据设备准备好
case SerialPortEvent.RI: // 响铃侦测
case SerialPortEvent.OUTPUT_BUFFER_EMPTY: // 输出缓冲区已清空
break;
case SerialPortEvent.DATA_AVAILABLE: // 有数据到达
// 调用读取数据的方法
readComm();
break;
default:
break;
}
}
/**
* 读取串口返回信息
*
* @author LinWenLi
* @date 2018年7月21日下午3:43:04
* @return: void
*/
public void readComm() {
try {
inputStream = serialPort.getInputStream();
// 通过输入流对象的available方法获取数组字节长度
byte[] readBuffer = new byte[inputStream.available()];
// 从线路上读取数据流
int len = 0;
while ((len = inputStream.read(readBuffer)) != -1) {
//直接获取到的数据
data = new String(readBuffer, 0, len).trim();
//转为十六进制数据
dataHex = bytesToHexString(readBuffer);
//System.out.println("data::" + data);
//System.out.println("dataHex:" + dataHex);// 读取后置空流对象
//System.out.println("code1:" + dataHex.substring(6, 10));
//System.out.println("code2:" + dataHex.substring(10, 14));
//String ts = new BigInteger(dataHex.substring(6, 10), 16).toString();
//String rs = new BigInteger(dataHex.substring(10, 14), 16).toString();
//System.out.println("温度:" + Double.valueOf(rs)/10);
//System.out.println("湿度:" + Double.valueOf(ts)/10);
inputStream.close();
inputStream = null;
break;
}
} catch (IOException e) {
System.out.println("读取串口数据时发生IO异常");
}
}
/**
* 发送信息到串口
*
* @throws
* @author LinWenLi
* @date 2018年7月21日下午3:45:22
* @param: data
* @return: void
*/
public void sendComm(String data) {
byte[] writerBuffer = null;
try {
writerBuffer = hexToByteArray(data);
//writerBuffer = new byte[]{(byte)0x01, (byte)0x03, (byte) 0x00, (byte) 0x00,(byte) 0x00,(byte) 0x02,(byte) 0xc4,(byte) 0x0b};
} catch (NumberFormatException e) {
//throw new CustomException("命令格式错误!");
System.out.println("命令格式错误!");
}
try {
outputStream = serialPort.getOutputStream();
outputStream.write(writerBuffer);
outputStream.flush();
} catch (NullPointerException e) {
//throw new CustomException("找不到串口。");
System.out.println("找不到串口。");
} catch (IOException e) {
//throw new CustomException("发送信息到串口时发生IO异常");
System.out.println("发送信息到串口时发生IO异常");
}
}
/**
* 关闭串口
*
* @throws
* @author LinWenLi
* @date 2018年7月21日下午3:45:43
* @Description: 关闭串口
* @param:
* @return: void
*/
public void closeSerialPort() {
if (serialPort != null) {
serialPort.notifyOnDataAvailable(false);
serialPort.removeEventListener();
if (inputStream != null) {
try {
inputStream.close();
inputStream = null;
} catch (IOException e) {
//throw new CustomException("关闭输入流时发生IO异常");
System.out.println("发送信息到串口时发生IO异常");
}
}
if (outputStream != null) {
try {
outputStream.close();
outputStream = null;
} catch (IOException e) {
//throw new CustomException("关闭输出流时发生IO异常");
System.out.println("关闭输出流时发生IO异常");
}
}
serialPort.close();
serialPort = null;
}
}
/**
* 十六进制串口返回值获取
*/
public String getDataHex() {
String result = dataHex;
// 置空执行结果
dataHex = null;
// 返回执行结果
return result;
}
/**
* 串口返回值获取
*/
public String getData(StringBuilder sb) {
String result = data;
System.out.println("result::" + result);
sb.append(result);
System.out.println("sb::" + sb);
// 置空执行结果
data = null;
// 返回执行结果
return result;
}
/**
* Hex字符串转byte
*
* @param inHex 待转换的Hex字符串
* @return 转换后的byte
*/
public static byte hexToByte(String inHex) {
return (byte) Integer.parseInt(inHex, 16);
}
/**
* hex字符串转byte数组
*
* @param inHex 待转换的Hex字符串
* @return 转换后的byte数组结果
*/
public static byte[] hexToByteArray(String inHex) {
int hexlen = inHex.length();
byte[] result;
if (hexlen % 2 == 1) {
// 奇数
hexlen++;
result = new byte[(hexlen / 2)];
inHex = "0" + inHex;
} else {
// 偶数
result = new byte[(hexlen / 2)];
}
int j = 0;
for (int i = 0; i < hexlen; i += 2) {
result[j] = hexToByte(inHex.substring(i, i + 2));
j++;
}
return result;
}
/**
* 数组转换成十六进制字符串
*
* @param
* @return HexString
*/
public static final String bytesToHexString(byte[] bArray) {
StringBuffer sb = new StringBuffer(bArray.length);
String sTemp;
for (int i = 0; i < bArray.length; i++) {
sTemp = Integer.toHexString(0xFF & bArray[i]);
if (sTemp.length() < 2)
sb.append(0);
sb.append(sTemp.toUpperCase());
}
return sb.toString();
}
}
controller类
import com.qwings.ipmgbascale.config.ParamConfig;
import com.qwings.ipmgbascale.response.ResponseObject;
import com.qwings.ipmgbascale.util.SerialPortUtils;
import net.sf.json.JSON;
import net.sf.json.JSONObject;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.HashMap;
import java.util.Map;
@RestController
@RequestMapping("/balance")
@CrossOrigin
public class IpmgbaScaleBalanceController {
@Value(value = "${com.qwings.ipmgbascale.serialNumber}")
private String serialNumber;
@Value(value = "${com.qwings.ipmgbascale.baudRate}")
private Integer baudRate;
@Value(value = "${com.qwings.ipmgbascale.checkoutBit}")
private Integer checkoutBit;
@Value(value = "${com.qwings.ipmgbascale.dataBit}")
private Integer dataBit;
@Value(value = "${com.qwings.ipmgbascale.stopBit}")
private Integer stopBit;
@RequestMapping("/getMessage")
@CrossOrigin
public String getMessage(@RequestParam("callback") String callback){
ResponseObject ro = new ResponseObject();
// 实例化串口操作类对象
SerialPortUtils serialPort = new SerialPortUtils();
// 创建串口必要参数接收类并赋值,赋值串口号,波特率,校验位,数据位,停止位
ParamConfig paramConfig = new ParamConfig(serialNumber, baudRate, checkoutBit, dataBit, stopBit);
// 初始化设置,打开串口,开始监听读取串口数据
serialPort.init(paramConfig);
// 调用串口操作类的sendComm方法发送数据到串口
serialPort.sendComm("52");// R 对应 ASII码值 52
try {
Thread.currentThread().sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
// 获取十进制的返回信息 类似于 188.34 g
ro.setData(serialPort.getData(new StringBuilder()));
// 关闭串口
serialPort.closeSerialPort();
ro.setCode(200);
ro.setMsg("OK");
JSONObject jsonObject = JSONObject.fromObject(ro);
System.out.println(callback + "(" + jsonObject + ")");
return callback + "(" + jsonObject + ")";
}
}
yml
server:
servlet:
context-path: /
port: 9999
ssl:
protocol: TLS
key-store: classpath:server.keystore
key-store-password: 12345678
key-store-type: JKS
com:
qwings:
ipmgbascale:
serialNumber: COM3
baudRate: 9600
checkoutBit: 0
dataBit: 8
stopBit: 1
ipmgbascaleweighbridge:
serialNumber: COM3 # USB-SERIAL CH340 # 串口号
baudRate: 9600 # 波特率
checkoutBit: 0 # 校验位
dataBit: 8 # 数据位
stopBit: 1 # 停止位
jsonp
// 地秤
function weighbridge(rowData){
var id = rowData["ID"];
$.ajax({
type : "GET",
url : "https://localhost:443/weighbridge/getMessage",
dataType: 'jsonp', // 请求方式为jsonp
crossDomain: true,
data : {},
success : function(data){
var weight = data.data;
$.ajax({
type : "POST",
url : "./jd",
dataType : "text",
data : {
cmd : "com.qwings.apps.resource.updateWeight",
sid : $("#sid").val(),
weight: weight,
id: id,
bindId : $("#processInstId").val()
},
success : function(res){
var responseObject = JSON.parse(res);
if (responseObject.result == "ok") {
$("#FormGridTB_59103b18-22b6-44e7-84ec-6c2e3f736a06_Btn_Refresh").trigger("click");
}
}
});
},
error : function(ro){
console.log('ssssss')
}
});
}
Java制作证书的工具keytool用法详解
有证书可以支持https,没有证书只能使用http
https://www.jb51.net/article/238417.htm