一、Modbus 互转代码
1.实现代码
@Data
public class ModbusTools {
/**
* modbus数据转对象
* @param data 串口数据
* @param dataType 1代表16位读取2个byte数据，2代表32位读取4个byte数据
*/
public static ModbusDataAnalyzeBean dataAnalyze(byte []data, int dataType)
{
int readByteNum=0;//一次要读取多少个byte
if (dataType==1)
{
readByteNum=2;
}
else if (dataType>1)
{
readByteNum=dataType*dataType;
}
ModbusDataAnalyzeBean modbusDataAnalyzeBean =new ModbusDataAnalyzeBean();
modbusDataAnalyzeBean.setAddr(Integer.parseInt(getOctFromHexBytes(data,0)));//获取地址
modbusDataAnalyzeBean.setFuncode(Integer.parseInt(getOctFromHexBytes(data,1)));//获取功能码
modbusDataAnalyzeBean.setDataType(dataType);//数据类型
int byteNum=Integer.parseInt(getOctFromHexBytes(data,2));//统计有效byte数据个数
ArrayList<Double> arrayListVlaue=new ArrayList();
for (int n=1;n<(byteNum/readByteNum)+1;n++)
{
arrayListVlaue.add(Double.parseDouble(getOctFromHexBytes(data,3+readByteNum*(n-1),3+readByteNum*n-1)));//获取值
}
modbusDataAnalyzeBean.setValues(arrayListVlaue);//将取到的值存进返回对象
return modbusDataAnalyzeBean;
}
/**
* 对象转modbus数据
* @param modbusDataFormationBean
* @return
*/
public static byte[] data(ModbusDataFormationBean modbusDataFormationBean)
{
int readByteNum=0;//一次要读取多少个byte
if (modbusDataFormationBean.getDataType()==1)
{
readByteNum=2;
}
else if (modbusDataFormationBean.getDataType()>1)
{
readByteNum=modbusDataFormationBean.getDataType()*modbusDataFormationBean.getDataType();
}
byte[] command={};
command = append(command,octInt2ByteArray( modbusDataFormationBean.getAddr(), 1));//设置地址
command = append(command,octInt2ByteArray( modbusDataFormationBean.getFuncode(), 1)); //设置功能码
command = append(command,octInt2ByteArray( modbusDataFormationBean.getPortNumber(), 2));//设置寄存器起始地址
command = append(command,octInt2ByteArray( modbusDataFormationBean.getValue(), readByteNum));//设置数据值
command = append(command, octInt2ByteArray( getCRC162Int(command,true), 2) );// 设置CRC16校验
return command;
}
/**
* 取得十制数组的from~to位,并按照十六进制转化值
*
* @param data
* @param from
* @param to
* @return
*/
private static String getOctFromHexBytes(byte[] data, Object from, Object... to) {
if (data != null && data.length > 0 && from != null) {
try {
byte[] value;
int fromIndex = Integer.parseInt(from.toString());
if (to != null && to.length > 0) {
int toIndex = Integer.parseInt(to[0].toString());
if (fromIndex >= toIndex || toIndex <= 0) {
value = Arrays.copyOfRange(data, fromIndex, fromIndex + 1);
} else {
value = Arrays.copyOfRange(data, fromIndex, toIndex + 1);
}
} else {
value = Arrays.copyOfRange(data, fromIndex, fromIndex + 1);
}
if (value != null && value.length > 0) {
long octValue = 0L;
int j = -1;
for (int i = value.length - 1; i >= 0; i--, j++) {
int d = value[i];
if (d < 0) {
d += 256;
}
octValue += Math.round(d * Math.pow(16, 2 * j + 2));
}
return new Long(octValue).toString();
}
} catch (Exception e) {
e.printStackTrace();
}
}
return null;
}
/**
* 十进制的字符串表示转成字节数组
*
* @param octString
* 十进制格式的字符串
* @param capacity
* 需要填充的容量(可选)
* @return 转换后的字节数组
**/
private static byte[] octInt2ByteArray(Integer oct, int... capacity) {
return hexString2ByteArray(Integer.toHexString(oct), capacity);
}
/**
* 16进制的字符串表示转成字节数组
*
* @param hexString
* 16进制格式的字符串
* @param capacity
* 需要填充的容量(可选)
* @return 转换后的字节数组
**/
private static byte[] hexString2ByteArray(String hexString, int... capacity) {
hexString = hexString.toLowerCase();
if (hexString.length() % 2 != 0) {
hexString = "0" + hexString;
}
int length = hexString.length() / 2;
if (length < 1) {
length = 1;
}
int size = length;
if (capacity != null && capacity.length > 0 && capacity[0] >= length) {
size = capacity[0];
}
final byte[] byteArray = new byte[size];
int k = 0;
for (int i = 0; i < size; i++) {
if (i < size - length) {
byteArray[i] = 0;
} else {
byte high = (byte) (Character.digit(hexString.charAt(k), 16) & 0xff);
if (k + 1 < hexString.length()) {
byte low = (byte) (Character.digit(hexString.charAt(k + 1), 16) & 0xff);
byteArray[i] = (byte) (high << 4 | low);
} else {
byteArray[i] = (byte) (high);
}
k += 2;
}
}
return byteArray;
}
/**
* 连接字节流
*
* @return
*/
private static byte[] append(byte[] datas, byte[] data) {
if (datas == null) {
return data;
}
if (data == null) {
return datas;
} else {
return concat(datas, data);
}
}
/**
* 字节流拼接
*
* @param data
* 字节流
* @return 拼接后的字节数组
**/
private static byte[] concat(byte[]... data) {
if (data != null && data.length > 0) {
int size = 0;
for (int i = 0; i < data.length; i++) {
size += data[i].length;
}
byte[] byteArray = new byte[size];
int pos = 0;
for (int i = 0; i < data.length; i++) {
byte[] b = data[i];
for (int j = 0; j < b.length; j++) {
byteArray[pos++] = b[j];
}
}
return byteArray;
}
return null;
}
private static Integer getCRC162Int(byte[] bytes,Boolean flag) {
int CRC = 0x0000ffff;
int POLYNOMIAL = 0x0000a001;
int i, j;
for (i = 0; i < bytes.length; i++) {
// CRC ^= (int) bytes[i];
if(bytes[i] <0 ){
CRC ^= (int) (bytes[i]+256) ;
}else{
CRC ^= (int) bytes[i] ;
}
for (j = 0; j < 8; j++) {
if ((CRC & 0x00000001) == 1) {
CRC >>= 1;
CRC ^= POLYNOMIAL;
} else {
CRC >>= 1;
}
}
}
//高低位转换，看情况使用（譬如本人这次对led彩屏的通讯开发就规定校验码高位在前低位在后，也就不需要转换高低位)
if(flag){
CRC = ( (CRC & 0x0000FF00) >> 8) | ( (CRC & 0x000000FF ) << 8);
}
return CRC;
}
}
2 modbus解析为对象的实体类
@Data
public class ModbusDataAnalyzeBean {
private Integer addr;//地址
private Integer funcode;//功能码
private Integer dataType;//1代表16位int，2代表32位Double
private ArrayList<Double> values;//寄存器值
public Integer getAddr() {
return addr;
}
public void setAddr(Integer addr) {
this.addr = addr;
}
public Integer getFuncode() {
return funcode;
}
public void setFuncode(Integer funcode) {
this.funcode = funcode;
}
public ArrayList<Double> getValues() {
return values;
}
public void setValues(ArrayList<Double> values) {
this.values = values;
}
public Integer getDataType() {
return dataType;
}
public void setDataType(Integer dataType) {
this.dataType = dataType;
}
}
3 拼接为modbus数据的实体类
@Data
public class ModbusDataFormationBean {
private Integer addr;//地址
private Integer funcode;//功能码
private Integer portNumber;//寄存器起始地址
private Integer dataType;//1代表16位int，2代表32位Double
private Integer value;//值
public Integer getAddr() {
return addr;
}
public void setAddr(Integer addr) {
this.addr = addr;
}
public Integer getFuncode() {
return funcode;
}
public void setFuncode(Integer funcode) {
this.funcode = funcode;
}
public Integer getDataType() {
return dataType;
}
public void setDataType(Integer dataType) {
this.dataType = dataType;
}
public Integer getPortNumber() {
return portNumber;
}
public void setPortNumber(Integer portNumber) {
this.portNumber = portNumber;
}
public Integer getValue() {
return value;
}
public void setValue(Integer value) {
this.value = value;
}
}
二、开始使用
1.代码调用
public static void main(String []ags)
{
//模拟向2号寄存器写入100
ModbusDataFormationBean modbusDataFormationBean=new ModbusDataFormationBean();
modbusDataFormationBean.setAddr(1);//地址1
modbusDataFormationBean.setFuncode(5);//功能码5代表写入寄存器
modbusDataFormationBean.setPortNumber(2);//2代表寄存器起始位为2
modbusDataFormationBean.setValue(100);//向2号寄存器写入100
modbusDataFormationBean.setDataType(1);//1代表写入的值是16位的
byte[] modbusData=ModbusTools.data(modbusDataFormationBean);//对象转modbus数据
//模拟读取返回的3个寄存器数据
byte[] data={(byte)0x01,(byte)0x03,(byte)0x06,(byte)0x01,(byte)0x67,(byte) 0xff,(byte) 0xb5,(byte)0x00,(byte)0x64,(byte)0xd7,(byte)0x5e};
ModbusDataAnalyzeBean modbusDataAnalyzeBean =ModbusTools.dataAnalyze(data,1);
System.out.println("modbus数据解析为对象:"+modbusDataAnalyzeBean.toString());//modbus数据转对象
}
测试结果：
标签：java,int,return,Modbus,length,互转,Integer,byte,public From： https://www.cnblogs.com/clf125800/p/17342631.html