前言： 由于最近有解析协议的一些业务场景，需要用到一些字节操作工具，这里封装了一些比较常用的转换方法，测试后基本没有问题，可能一些比较偏门的数据会出现数据转换错误
前言：
由于最近有解析协议的一些业务场景，需要用到一些字节操作工具，这里封装了一些比较常用的转换方法，测试后基本没有问题，可能一些比较偏门的数据会出现数据转换错误
- int与数组相互转换
- short与数组想换转换
- 获取int指定位的数据
- 获取int指定范围的位数据
- 对象转换数组，数组转换对象
public class AppTest {
/**
* Rigorous Test :-)
*/
@Test
public void shouldAnswerWithTrue() {
int hex = 16;
System.out.println("获取16进制字符串数据:" + BitOperator.intToHexString(hex, 2));
System.out.println("获取int类型0-8位的位数据:" + BitOperator.intNumberRightBitRangeOperator(999, 0, 8));
System.out.println("获取int类型9-10位的位数据：" + BitOperator.intNumberRightBitRangeOperator(999, 8, 10));
System.out.println("获取int类型10-12位的位数据：" + BitOperator.intNumberRightBitRangeOperator(256, 10, 12));
short value = 256;
System.out.println("获取short类型10-12位的位数据：" + BitOperator.shortNumberRightBitRangeOperator(value, 8, 12));
//序列化与反序列化对象
byte[] bytes = BitOperator.objToBytes(new A());
A object = (A) BitOperator.bytesToObject(bytes);
System.out.println(object);
//转换int数据
int intV = 12738123;
byte[] bytes1 = {
(byte) ((intV >> 24) & 0xff),
(byte) ((intV >> 16) & 0xff),
(byte) ((intV >> 8) & 0xff),
(byte) (intV & 0xff)
};
byte[] bytes2 = BitOperator.intNumberToBytes(intV);
int intNumber = BitOperator.bytesToIntNumber(bytes2);
//转换short类型
short sv = 999;
byte[] bytes3 = {
(byte) ((sv >> 8) & 0xff),
(byte) (sv & 0xff)
};
short i = BitOperator.bytesToShortNumber(bytes3);
System.out.println(i);
}
@ToString
public static class A implements Serializable {
public String name = "zs";
}
}
@SuppressWarnings("all")
public class BitOperator {
/** DIGITAL */
public static final String DIGITAL = "0123456789ABCDEF";
/** 16进制表示符 */
public static final String HEX = "0x";
/**
* 数组转换成 int类型
*
* @param value value
* @return the byte [ ]
* @since 1.0
*/
public static byte[] intNumberToBytes(int value) {
return new byte[] {
byteNumberRightBitRangeOperator(value, 24, 32),
byteNumberRightBitRangeOperator(value, 16, 24),
byteNumberRightBitRangeOperator(value, 8, 16),
byteNumberRightBitRangeOperator(value, 0, 8)
};
}
/**
* Short number to bytes
*
* @param value value
* @return the byte [ ]
* @since 1.0
*/
public static byte[] shortNumberToBytes(short value) {
return new byte[] {
(byte) shortNumberRightBitRangeOperator(value, 8, 16),
(byte) shortNumberRightBitRangeOperator(value, 0, 8)
};
}
/**
* 数组转换成int数据
*
* @param bytes bytes
* @return the int
* @since 1.0
*/
public static int bytesToIntNumber(byte[] bytes) {
return bytesToNumberValue(bytes,0, (res, value) -> {
return value | res;
});
}
/**
* 将数组转换成short类型
*
* @param bytes bytes
* @return the int
* @since 1.0
*/
public static short bytesToShortNumber(byte[] bytes) {
return bytesToNumberValue(bytes, (short) 0, (res, value) -> {
return (short) (res | value);
});
}
/**
* Bytes to number value
*
* @param <T> parameter
* @param bytes bytes
* @param value value
* @param function function
* @return the t
* @since 1.0
*/
public static <T extends Number> T bytesToNumberValue(byte[] bytes,
T value,
BiFunction<Integer, T, T> function) {
try {
int tmp = bytes.length * 8;
for (int i = 0; i < bytes.length; i++) {
tmp -= 8;
value = function.apply(((bytes[i] & 0xff) << tmp), value);
}
} catch (Exception e) {
e.printStackTrace();
}
return value;
}
/**
* 16进制字符串转换为字节数组
*
* @param str str
* @return the byte [ ]
* @since 1.0
*/
public static byte[] hexStringToByteArray(String str) {
int len = str.length();
byte[] data = new byte[len / 2];
for (int i = 0; i < len; i += 2) {
data[i / 2] = (byte) ((Character.digit(str.charAt(i), 16) << 4)
+ Character.digit(str.charAt(i + 1), 16));
}
return data;
}
/**
* 字节数组转换为16进制字符串
*
* @param src src
* @return string string
* @since 2022.1.1
*/
public static String bytesArrayToHexString(byte[] src) {
StringBuilder stringBuilder = new StringBuilder();
if (src == null || src.length <= 0) {
return null;
}
for (byte b : src) {
int v = b & 0xFF;
String hv = Integer.toHexString(v);
if (hv.length() < 2) {
stringBuilder.append(0);
}
stringBuilder.append(hv);
}
return stringBuilder.toString();
}
/**
* 16进制字符串转换为字节数组
*
* @param hex hex
* @return byte [ ]
* @since 1.0
*/
public static byte[] stringToBytes(String hex) {
String hex1 = hex.replace(" ", "");
char[] hex2char = hex1.toCharArray();
byte[] bytes = new byte[hex1.length() / 2];
byte temp;
for (int p = 0; p < bytes.length; p++) {
temp = (byte) (DIGITAL.indexOf(hex2char[2 * p]) * 16);
temp += DIGITAL.indexOf(hex2char[2 * p + 1]);
bytes[p] = (byte) (temp & 0xff);
}
return bytes;
}
/**
* string字符串转换为 16进制字符串
*
* @param hex hex
* @return the string
* @since 1.0
*/
public static String stringToHexString(String s) {
StringBuilder str = new StringBuilder();
for (int i = 0; i < s.length(); i++) {
int ch = (int) s.charAt(i);
String s4 = Integer.toHexString(ch);
str.append(s4);
}
return HEX + str.toString();
}
/**
* int类型转换为16进制字符串
*
* @param value value
* @param number 不足指定位数补零
* @return the string
* @since 1.0
*/
public static String intToHexString(int value, int number) {
return numberValueToHexString(value, number, true);
}
/**
* long类型转换为16进制字符串
*
* @param value value
* @param number number
* @return the string
* @since 1.0
*/
public static String longToHexString(long value, int number) {
return numberValueToHexString(value, number, true);
}
/**
* 数字类型类型转换为16进制字符串
*
* @param value value
* @param number number
* @param isShowHex 是否拼接Ox
* @return the string
* @since 1.0
*/
public static String numberValueToHexString(Object value, int number, boolean isShowHex) {
if (number <= 0) {
number = 2;
}
String hex = String.format("%0" + number + "x", value);
return isShowHex ? HEX + hex : hex;
}
/**
* 获取指定位的位数据
*
* @param value value
* @param bitNumber bit number
* @return the int
* @since 1.0
*/
public static int intNumberRightBitOperator(int value, int bitNumber) {
return bitNumberOperator(32, bitNumber, str -> str != null ? ((value & Integer.parseUnsignedInt(str, 2)) >> bitNumber) : 0);
}
/**
* 获取Long类型指定位数的数据
*
* @param value value
* @param bitNumber bit number
* @return the int
* @since 1.0
*/
public static Long longNumberRightBitOperator(long value, int bitNumber) {
return bitNumberOperator(64, bitNumber, str -> str != null ? ((value & Long.parseUnsignedLong(str, 2)) >> bitNumber) : 0);
}
/**
* 获取指定位的数据
*
* @param <T> parameter
* @param valueBit 数据类型的长度，例如int：32位
* @param number 表示取多少位的数据
* @param func func
* @return the int
* @since 1.0
*/
public static <T> T bitNumberOperator(int valueBit, int number, Function<String, T> func) {
if (number > valueBit) {
return (T) new Integer(0);
}
//获取到位的长度，根据长度生成对应的二进制位数据，获取数据需要生成 1
StringBuilder builder = new StringBuilder();
number = valueBit - number;
for (int i = 0; i < valueBit; i++) {
if (i == number) {
builder.append("1");
} else {
builder.append("0");
}
}
return func.apply(builder.toString());
}
/**
* 获取int类型数据指定范围的数据
*
* @param value value
* @param start start
* @param end end
* @return the int
* @since 1.0
*/
public static int intNumberRightBitRangeOperator(int value, int start, int end) {
return bitNumberRangeOperator(start, end, 32, str -> str != null ? ((value & Integer.parseUnsignedInt(str, 2)) >> start) : 0);
}
/**
* 获取int类型数据指定范围的数据
*
* @param value value
* @param start start
* @param end end
* @return the int
* @since 1.0
*/
public static byte byteNumberRightBitRangeOperator(int value, int start, int end) {
return (byte) intNumberRightBitRangeOperator(value, start, end);
}
/**
* 获取short类型指定范围位数的数据
*
* @param value value
* @param start start
* @param end end
* @return the int
* @since 1.0
*/
public static short shortNumberRightBitRangeOperator(short value, int start, int end) {
return bitNumberRangeOperator(start, end, 16, str -> (short) (str != null ? ((value & Short.parseShort(str, 2)) >> start) : 0));
}
/**
* 获取指定位的数据
*
* @param <T> parameter
* @param start start
* @param end end
* @param typeLength type length
* @param func func
* @return the int
* @since 1.0
*/
public static <T> T bitNumberRangeOperator(int start, int end, int typeLength, Function<String, T> func) {
if (start > end) {
return (T) new Integer(0);
}
//获取到位的长度，根据长度生成对应的二进制位数据，获取数据需要生成 1
StringBuilder builder = new StringBuilder();
for (int i = typeLength - 1; i >= 0; i--) {
if (i >= start && i < end) {
builder.append("1");
} else {
builder.append("0");
}
}
return func.apply(builder.toString());
}
/**
* obj对象转换为字节数组
*
* @param obj obj
* @return the string
* @since 1.0
*/
public static byte[] objToBytes(Object obj) {
ByteArrayOutputStream objByteArray = new ByteArrayOutputStream();
byte[] result;
try (ObjectOutputStream objectOutputStream = new ObjectOutputStream(objByteArray);) {
objectOutputStream.writeObject(obj);
objectOutputStream.flush();
objectOutputStream.close();
result = objByteArray.toByteArray();
} catch (IOException e) {
throw new RuntimeException("对象数据转换异常:" + e.getMessage());
}
return result;
}
/**
* 反序列化对象
*
* @param bytes bytes
* @return the object
* @since 1.0
*/
public static Object bytesToObject(byte[] bytes) {
ByteArrayInputStream arrayInputStream = new ByteArrayInputStream(bytes);
Object result = null;
try(ObjectInputStream objectInputStream = new ObjectInputStream(arrayInputStream);) {
result = objectInputStream.readObject();
} catch (IOException | ClassNotFoundException e) {
e.printStackTrace();
}
return result;
}
}
到此这篇关于Java协议字节操作工具类详情的文章就介绍到这了,更多相关Java操作工具类内容请搜索自由互联以前的文章或继续浏览下面的相关文章希望大家以后多多支持自由互联！