废话不多说,直接上代码。转换16进制字节数组,做数据处理时用得着,收藏吧!
/** * Created by xiaoming on 2017-10-13 15:02. * * @mail sgyingyin@sina.com * @desc 16进制数据处理工具类 */
public class HexDump {
private final static char[] HEX_DIGITS = {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};//十六进制的组成元素
/** * 字节数组以String形式输出 以空格分隔,如:FE 00 12 0F 0E * * @param array 字节数组 * @return */
public static String dumpHexString(byte[] array) {
return dumpHexString(array, 0, array.length);
}
/** * 字节数组以String形式输出 字节间以空格分隔 * * @param array 字节数组 * @param offset 起始位置 * @param length 长度 * @return */
public static String dumpHexString(byte[] array, int offset, int length) {
StringBuilder result = new StringBuilder();
byte[] line = new byte[16];
int lineIndex = 0;
result.append("\n0x");
result.append(toHexString(offset));
for (int i = offset; i < offset + length; i++) {
if (lineIndex == 16) {
result.append(" ");
for (int j = 0; j < 16; j++) {
if (line[j] > ' ' && line[j] < '~') {
result.append(new String(line, j, 1));
} else {
result.append(".");
}
}
result.append("\n0x");
result.append(toHexString(i));
lineIndex = 0;
}
byte b = array[i];
result.append(" ");
result.append(HEX_DIGITS[(b >>> 4) & 0x0F]);
result.append(HEX_DIGITS[b & 0x0F]);
line[lineIndex++] = b;
}
if (lineIndex != 16) {
int count = (16 - lineIndex) * 3;
count++;
for (int i = 0; i < count; i++) {
result.append(" ");
}
for (int i = 0; i < lineIndex; i++) {
if (line[i] > ' ' && line[i] < '~') {
result.append(new String(line, i, 1));
} else {
result.append(".");
}
}
}
return result.toString();
}
/** * 字节转16进制String * * @param b 字节 * @return */
public static String toHexString(byte b) {
return toHexString(toByteArray(b));
}
/** * 字节数组转16进制String,无分隔,如:FE00120F0E * * @param array 字节数组 * @return */
public static String toHexString(byte[] array) {
return toHexString(array, 0, array.length);
}
/** * 字节数组转16进制String,无分隔,如:FE00120F0E * * @param array 字节数组 * @param offset 起始 * @param length 长度 * @return */
public static String toHexString(byte[] array, int offset, int length) {
char[] buf = new char[length * 2];
int bufIndex = 0;
for (int i = offset; i < offset + length; i++) {
byte b = array[i];
buf[bufIndex++] = HEX_DIGITS[(b >>> 4) & 0x0F];
buf[bufIndex++] = HEX_DIGITS[b & 0x0F];
}
return new String(buf);
}
/** * int转16进制String * * @param i * @return */
public static String toHexString(int i) {
return toHexString(toByteArray(i));
}
/** * 字节转数组 * * @param b * @return */
public static byte[] toByteArray(byte b) {
byte[] array = new byte[1];
array[0] = b;
return array;
}
/** * int转字节数组 * * @param i * @return */
public static byte[] toByteArray(int i) {
byte[] array = new byte[4];
array[3] = (byte) (i & 0xFF);
array[2] = (byte) ((i >> 8) & 0xFF);
array[1] = (byte) ((i >> 16) & 0xFF);
array[0] = (byte) ((i >> 24) & 0xFF);
return array;
}
/** * 十六进制转int * * @param c * @return */
private static int toByte(char c) {
if (c >= '0' && c <= '9') return (c - '0');
if (c >= 'A' && c <= 'F') return (c - 'A' + 10);
if (c >= 'a' && c <= 'f') return (c - 'a' + 10);
throw new RuntimeException("Invalid hex char '" + c + "'");
}
/** * 十六进制字符串转字节数组 * * @param hexString 如:FE00120F0E * @return */
public static byte[] hexStringToByteArray(String hexString) {
int length = hexString.length();
byte[] buffer = new byte[length / 2];
for (int i = 0; i < length; i += 2) {
buffer[i / 2] = (byte) ((toByte(hexString.charAt(i)) << 4) | toByte(hexString.charAt(i + 1)));
}
return buffer;
}
}
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