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common/transport/tcp/src/main/java/org/thingsboard/server/transport/tcp/util/ByteUtils.java
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1 | -package org.thingsboard.server.transport.tcp.util; | |
2 | - | |
3 | -import io.netty.buffer.ByteBuf; | |
4 | -import org.apache.commons.lang3.ArrayUtils; | |
5 | - | |
6 | -import java.io.*; | |
7 | -import java.nio.charset.Charset; | |
8 | -import java.util.regex.Pattern; | |
9 | - | |
10 | -/** | |
11 | - * @Description :数据类型转换工具类 | |
12 | - * 二进制的最高位是符号位,0表示正,1表示负。 | |
13 | - * 负数采用二进制的补码表示,10进制转为二进制得到的是源码,将源码按位取反得到的是反码,反码加1得到补码 | |
14 | - * | |
15 | - * | |
16 | - * *¥¥¥【基本数据类型】¥¥¥¥¥¥¥¥¥¥¥¥ | |
17 | - 1/8:boolean【1 位】 | |
18 | - 3/8:byte 【1个字节,8 位】 | |
19 | - 3/8:short 【2个字节,16位】 | |
20 | - 4/8:int 【4个字节,32位】 | |
21 | - 5/8:long 【8个字节,64位】 | |
22 | - 6/8:float 【4个字节,32位】 | |
23 | - 7/8:double 【8个字节,64位】 | |
24 | - 8/8:chart 【2个字节,16位】 | |
25 | - * | |
26 | - * | |
27 | - * | |
28 | - * *¥¥¥【位运算】¥¥¥¥¥¥¥¥¥¥¥¥ | |
29 | - 左移【<< n】:向左移动,左边高位舍弃,右边的低位补0,例如:2左移3位,结果为16 | |
30 | - 右移【>>n】:向右移动,右边的舍弃掉,左边补的值取决于原来最高位,原来是1就补1,原来是0就补0 | |
31 | - 无符号右移【>>>n】向右移动,右边的舍弃掉,左边补0。 | |
32 | - * | |
33 | - * | |
34 | - * | |
35 | - * 1.其它地方抛出异常,交由控制层统一处理 | |
36 | - * 2.服务层注意持久化的事务管理 | |
37 | - * @Author: junlianglee | |
38 | - * @Date Created in 2019/12/11. | |
39 | - * @Modified by Administrator on 2019/12/11. | |
40 | - */ | |
41 | -public class ByteUtils { | |
42 | - public static final char[] ascii = "0123456789ABCDEF".toCharArray(); | |
43 | - private static char[] HEX_VOCABLE = {'0', '1', '2', '3', '4', '5', '6', '7', | |
44 | - '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'}; | |
45 | - | |
46 | - public static final String UTF_8 = "UTF-8"; | |
47 | - | |
48 | - private static String hexString="0123456789ABCDEF"; | |
49 | - /** | |
50 | - * 将short整型数值转换为字节数组 | |
51 | - * | |
52 | - * @param data | |
53 | - * @return | |
54 | - */ | |
55 | - public static byte[] getBytes(short data) { | |
56 | - byte[] bytes = new byte[2]; | |
57 | - bytes[0] = (byte) ((data & 0xff00) >> 8);//1个十六进制位匹配4个二进制位 | |
58 | - bytes[1] = (byte) (data & 0xff); | |
59 | - return bytes; | |
60 | - } | |
61 | - | |
62 | - /** | |
63 | - * 将字符转换为字节数组 | |
64 | - * | |
65 | - * @param data | |
66 | - * @return | |
67 | - */ | |
68 | - public static byte[] getBytes(char data) { | |
69 | - byte[] bytes = new byte[2]; | |
70 | - bytes[0] = (byte) (data >> 8); | |
71 | - bytes[1] = (byte) (data); | |
72 | - return bytes; | |
73 | - } | |
74 | - | |
75 | - /** | |
76 | - * 将布尔值转换为字节数组 | |
77 | - * | |
78 | - * @param data | |
79 | - * @return | |
80 | - */ | |
81 | - public static byte[] getBytes(boolean data) { | |
82 | - byte[] bytes = new byte[1]; | |
83 | - bytes[0] = (byte) (data ? 1 : 0); | |
84 | - return bytes; | |
85 | - } | |
86 | - | |
87 | - /** | |
88 | - * 将整型数值转换为字节数组 | |
89 | - * | |
90 | - * @param data | |
91 | - * @return | |
92 | - */ | |
93 | - public static byte[] getBytes(int data) { | |
94 | - byte[] bytes = new byte[4]; | |
95 | - bytes[0] = (byte) ((data & 0xff000000) >> 24); | |
96 | - bytes[1] = (byte) ((data & 0xff0000) >> 16); | |
97 | - bytes[2] = (byte) ((data & 0xff00) >> 8); | |
98 | - bytes[3] = (byte) (data & 0xff); | |
99 | - return bytes; | |
100 | - } | |
101 | - | |
102 | - /** | |
103 | - * 将long整型数值转换为字节数组 | |
104 | - * | |
105 | - * @param data | |
106 | - * @return | |
107 | - */ | |
108 | - public static byte[] getBytes(long data) { | |
109 | - byte[] bytes = new byte[8]; | |
110 | - bytes[0] = (byte) ((data >> 56) & 0xff); | |
111 | - bytes[1] = (byte) ((data >> 48) & 0xff); | |
112 | - bytes[2] = (byte) ((data >> 40) & 0xff); | |
113 | - bytes[3] = (byte) ((data >> 32) & 0xff); | |
114 | - bytes[4] = (byte) ((data >> 24) & 0xff); | |
115 | - bytes[5] = (byte) ((data >> 16) & 0xff); | |
116 | - bytes[6] = (byte) ((data >> 8) & 0xff); | |
117 | - bytes[7] = (byte) (data & 0xff); | |
118 | - return bytes; | |
119 | - } | |
120 | - | |
121 | - /** | |
122 | - * 将float型数值转换为字节数组 | |
123 | - * | |
124 | - * @param data | |
125 | - * @return | |
126 | - */ | |
127 | - public static byte[] getBytes(float data) { | |
128 | - int intBits = Float.floatToIntBits(data); | |
129 | - return getBytes(intBits); | |
130 | - } | |
131 | - | |
132 | - /** | |
133 | - * 将double型数值转换为字节数组 | |
134 | - * | |
135 | - * @param data | |
136 | - * @return | |
137 | - */ | |
138 | - public static byte[] getBytes(double data) { | |
139 | - long intBits = Double.doubleToLongBits(data); | |
140 | - return getBytes(intBits); | |
141 | - } | |
142 | - | |
143 | - /** | |
144 | - * 将字符串按照charsetName编码格式的字节数组 | |
145 | - * | |
146 | - * @param data | |
147 | - * 字符串 | |
148 | - * @param charsetName | |
149 | - * 编码格式 | |
150 | - * @return | |
151 | - */ | |
152 | - public static byte[] getBytes(String data, String charsetName) { | |
153 | - Charset charset = Charset.forName(charsetName); | |
154 | - return data.getBytes(charset); | |
155 | - } | |
156 | - | |
157 | - | |
158 | - | |
159 | - | |
160 | - | |
161 | - /** | |
162 | - * 将字节数组前8字节转换为long整型数值 | |
163 | - * | |
164 | - * @param bytes | |
165 | - * @return | |
166 | - */ | |
167 | - public static long getLong(byte[] bytes) { | |
168 | - return (0xff00000000000000L & ((long) bytes[0] << 56) | |
169 | - | (0xff000000000000L & ((long) bytes[1] << 48)) | |
170 | - | (0xff0000000000L & ((long) bytes[2] << 40)) | |
171 | - | (0xff00000000L & ((long) bytes[3] << 32)) | |
172 | - | (0xff000000L & ((long) bytes[4] << 24)) | |
173 | - | (0xff0000L & ((long) bytes[5] << 16)) | |
174 | - | (0xff00L & ((long) bytes[6] << 8)) | |
175 | - | (0xffL & (long) bytes[7])); | |
176 | - } | |
177 | - | |
178 | - | |
179 | - | |
180 | - /** | |
181 | - * 将charsetName编码格式的字节数组转换为字符串 | |
182 | - * | |
183 | - * @param bytes | |
184 | - * @param charsetName | |
185 | - * @return | |
186 | - */ | |
187 | - public static String getString(byte[] bytes, String charsetName) { | |
188 | - return new String(bytes, Charset.forName(charsetName)); | |
189 | - } | |
190 | - | |
191 | - | |
192 | - public static byte[] hexStr2Bytes(String hexString) { | |
193 | - if (hexString == null || hexString.equals("")) { | |
194 | - return null; | |
195 | - } | |
196 | - // toUpperCase将字符串中的所有字符转换为大写 | |
197 | - hexString = hexString.toUpperCase(); | |
198 | - int length = hexString.length() / 2;// 2个16进制字符表示一个字节,所以字节数组长度是字符串长度除以2 | |
199 | - // toCharArray将此字符串转换为一个新的字符数组。 | |
200 | - char[] hexChars = hexString.toCharArray(); | |
201 | - byte[] d = new byte[length]; | |
202 | - for (int i = 0; i < length; i++) { | |
203 | - int pos = i * 2; | |
204 | - d[i] = (byte) (charToByte(hexChars[pos]) << 4 | |
205 | - | charToByte(hexChars[pos + 1])); | |
206 | - } | |
207 | - return d; | |
208 | - } | |
209 | - | |
210 | - // charToByte返回在指定字符的第一个发生的字符串中的索引,即返回匹配字符 | |
211 | - private static byte charToByte(char c) { | |
212 | - return (byte) "0123456789ABCDEF".indexOf(c); | |
213 | - } | |
214 | - /** | |
215 | - * 将16进制字符串转换为字节数组 | |
216 | - * | |
217 | - * @param hex | |
218 | - * @return | |
219 | - */ | |
220 | - public static byte[] hexToBytes(String hex) { | |
221 | - if (hex.length() % 2 != 0) | |
222 | - throw new IllegalArgumentException( | |
223 | - "input string should be any multiple of 2!"); | |
224 | - hex.toUpperCase(); | |
225 | - | |
226 | - byte[] byteBuffer = new byte[hex.length() / 2]; | |
227 | - | |
228 | - byte padding = 0x00; | |
229 | - boolean paddingTurning = false; | |
230 | - for (int i = 0; i < hex.length(); i++) { | |
231 | - if (paddingTurning) { | |
232 | - char c = hex.charAt(i); | |
233 | - int index = indexOf(hex, c); | |
234 | - padding = (byte) ((padding << 4) | index); | |
235 | - byteBuffer[i / 2] = padding; | |
236 | - padding = 0x00; | |
237 | - paddingTurning = false; | |
238 | - } else { | |
239 | - char c = hex.charAt(i); | |
240 | - int index = indexOf(hex, c); | |
241 | - padding = (byte) (padding | index); | |
242 | - paddingTurning = true; | |
243 | - } | |
244 | - | |
245 | - } | |
246 | - return byteBuffer; | |
247 | - } | |
248 | - | |
249 | - private static int indexOf(String input, char c) { | |
250 | - int index = ArrayUtils.indexOf(HEX_VOCABLE, c); | |
251 | - | |
252 | - if (index < 0) { | |
253 | - throw new IllegalArgumentException("err input:" + input); | |
254 | - } | |
255 | - return index; | |
256 | - | |
257 | - } | |
258 | - /** | |
259 | - * 字节数组转16进制字符串 | |
260 | - * | |
261 | - * @param bs | |
262 | - * @return | |
263 | - */ | |
264 | - public static String bytesToHex(byte[] bs) { | |
265 | - StringBuilder sb = new StringBuilder(); | |
266 | - for (byte b : bs) { | |
267 | - int high = (b >> 4) & 0x0f; | |
268 | - int low = b & 0x0f; | |
269 | - sb.append(HEX_VOCABLE[high]); | |
270 | - sb.append(HEX_VOCABLE[low]); | |
271 | - } | |
272 | - return sb.toString(); | |
273 | - } | |
274 | - | |
275 | - private static final String messageRegular = "^[A-Za-z0-9!@#$%^&*()]+$"; | |
276 | - public static String bytesToStr(byte[] bs){ | |
277 | - String result = getString(bs, ByteUtils.UTF_8); | |
278 | - if(!Pattern.compile(messageRegular).matcher(result).matches()){ | |
279 | - result = bytesToHex(bs); | |
280 | - } | |
281 | - return result; | |
282 | - } | |
283 | - | |
284 | - public static byte[] strToBytes(String str){ | |
285 | - if(Pattern.compile(messageRegular).matcher(str).matches()){ | |
286 | - return hexStr2Bytes(str); | |
287 | - } | |
288 | - return getBytes(str,ByteUtils.UTF_8); | |
289 | - } | |
290 | - | |
291 | - /** | |
292 | - * 字节数组取前len个字节转16进制字符串 | |
293 | - * | |
294 | - * @param bs | |
295 | - * @param len | |
296 | - * @return | |
297 | - */ | |
298 | - public static String bytesToHex(byte[] bs, int len) { | |
299 | - StringBuilder sb = new StringBuilder(); | |
300 | - for (int i = 0; i < len; i++) { | |
301 | - byte b = bs[i]; | |
302 | - int high = (b >> 4) & 0x0f; | |
303 | - int low = b & 0x0f; | |
304 | - sb.append(HEX_VOCABLE[high]); | |
305 | - sb.append(HEX_VOCABLE[low]); | |
306 | - } | |
307 | - return sb.toString(); | |
308 | - } | |
309 | - /** | |
310 | - * 字节数组偏移offset长度之后的取len个字节转16进制字符串 | |
311 | - * | |
312 | - * @param bs | |
313 | - * @param offset | |
314 | - * @param len | |
315 | - * @return | |
316 | - */ | |
317 | - public static String bytesToHex(byte[] bs, int offset, int len) { | |
318 | - StringBuilder sb = new StringBuilder(); | |
319 | - for (int i = 0; i < len; i++) { | |
320 | - byte b = bs[offset + i]; | |
321 | - int high = (b >> 4) & 0x0f; | |
322 | - int low = b & 0x0f; | |
323 | - sb.append(HEX_VOCABLE[high]); | |
324 | - sb.append(HEX_VOCABLE[low]); | |
325 | - } | |
326 | - return sb.toString(); | |
327 | - } | |
328 | - /** | |
329 | - * 字节数组转16进制字符串 | |
330 | - * | |
331 | - * @param bs | |
332 | - * @return | |
333 | - */ | |
334 | - public static String byteToHex(byte bs) { | |
335 | - StringBuilder sb = new StringBuilder(); | |
336 | - int high = (bs >> 4) & 0x0f; | |
337 | - int low = bs & 0x0f; | |
338 | - sb.append(HEX_VOCABLE[high]); | |
339 | - sb.append(HEX_VOCABLE[low]); | |
340 | - return sb.toString(); | |
341 | - } | |
342 | - /** | |
343 | - * 将字节数组取反 | |
344 | - * | |
345 | - * @param src | |
346 | - * @return | |
347 | - */ | |
348 | - public static String negate(byte[] src) { | |
349 | - if (src == null || src.length == 0) { | |
350 | - return null; | |
351 | - } | |
352 | - byte[] temp = new byte[2 * src.length]; | |
353 | - for (int i = 0; i < src.length; i++) { | |
354 | - byte tmp = (byte) (0xFF ^ src[i]); | |
355 | - temp[i * 2] = (byte) ((tmp >> 4) & 0x0f); | |
356 | - temp[i * 2 + 1] = (byte) (tmp & 0x0f); | |
357 | - } | |
358 | - StringBuffer res = new StringBuffer(); | |
359 | - for (int i = 0; i < temp.length; i++) { | |
360 | - res.append(ascii[temp[i]]); | |
361 | - } | |
362 | - return res.toString(); | |
363 | - } | |
364 | - | |
365 | - | |
366 | - | |
367 | - /** | |
368 | - * 数组合并 | |
369 | - * @param before | |
370 | - * @param end | |
371 | - * @return | |
372 | - */ | |
373 | - public static byte[] merge(byte[]before,byte[]end){ | |
374 | - byte[] result= new byte[before.length+end.length]; | |
375 | - System.arraycopy(before,0,result,0,before.length); | |
376 | - System.arraycopy(end,0,result,before.length,end.length); | |
377 | - return result; | |
378 | - } | |
379 | - | |
380 | - public static byte[] subBytes(byte[]before,Integer start,Integer length){ | |
381 | - byte[] result= new byte[length]; | |
382 | - System.arraycopy(before,start,result,0,length); | |
383 | - return result; | |
384 | - } | |
385 | - | |
386 | - /** | |
387 | - * 比较字节数组是否相同 | |
388 | - * | |
389 | - * @param a | |
390 | - * @param b | |
391 | - * @return | |
392 | - */ | |
393 | - public static boolean compareBytes(byte[] a, byte[] b) { | |
394 | - if (a == null || a.length == 0 || b == null || b.length == 0 | |
395 | - || a.length != b.length) { | |
396 | - return false; | |
397 | - } | |
398 | - if (a.length == b.length) { | |
399 | - for (int i = 0; i < a.length; i++) { | |
400 | - if (a[i] != b[i]) { | |
401 | - return false; | |
402 | - } | |
403 | - } | |
404 | - } else { | |
405 | - return false; | |
406 | - } | |
407 | - return true; | |
408 | - } | |
409 | - /** | |
410 | - * 只比对指定长度byte | |
411 | - * | |
412 | - * @param a | |
413 | - * @param b | |
414 | - * @param len | |
415 | - * @return | |
416 | - */ | |
417 | - public static boolean compareBytes(byte[] a, byte[] b, int len) { | |
418 | - if (a == null || a.length == 0 || b == null || b.length == 0 | |
419 | - || a.length < len || b.length < len) { | |
420 | - return false; | |
421 | - } | |
422 | - for (int i = 0; i < len; i++) { | |
423 | - if (a[i] != b[i]) { | |
424 | - return false; | |
425 | - } | |
426 | - } | |
427 | - return true; | |
428 | - } | |
429 | - | |
430 | - /** | |
431 | - * 将字节数组转换为二进制字符串 | |
432 | - * | |
433 | - * @param items | |
434 | - * @return | |
435 | - */ | |
436 | - public static String bytesToBinaryString(byte[] items) { | |
437 | - if (items == null || items.length == 0) { | |
438 | - return null; | |
439 | - } | |
440 | - StringBuffer buf = new StringBuffer(); | |
441 | - for (byte item : items) { | |
442 | - buf.append(byteToBinaryString(item)); | |
443 | - } | |
444 | - return buf.toString(); | |
445 | - } | |
446 | - | |
447 | - /** | |
448 | - * 将字节转换为二进制字符串 | |
449 | - * | |
450 | - * @param item | |
451 | - * @return | |
452 | - */ | |
453 | - public static String byteToBinaryString(byte item) { | |
454 | - byte a = item; | |
455 | - StringBuffer buf = new StringBuffer(); | |
456 | - for (int i = 0; i < 8; i++) { | |
457 | - buf.insert(0, a % 2); | |
458 | - a = (byte) (a >> 1); | |
459 | - } | |
460 | - return buf.toString(); | |
461 | - } | |
462 | - | |
463 | - /** | |
464 | - * 对数组a,b进行异或运算 | |
465 | - * | |
466 | - * @param a | |
467 | - * @param b | |
468 | - * @return | |
469 | - */ | |
470 | - public static byte[] xor(byte[] a, byte[] b) { | |
471 | - if (a == null || a.length == 0 || b == null || b.length == 0 | |
472 | - || a.length != b.length) { | |
473 | - return null; | |
474 | - } | |
475 | - byte[] result = new byte[a.length]; | |
476 | - for (int i = 0; i < a.length; i++) { | |
477 | - result[i] = (byte) (a[i] ^ b[i]); | |
478 | - } | |
479 | - return result; | |
480 | - } | |
481 | - | |
482 | - /** | |
483 | - * 对数组a,b进行异或运算 运算长度len | |
484 | - * | |
485 | - * @param a | |
486 | - * @param b | |
487 | - * @param len | |
488 | - * @return | |
489 | - */ | |
490 | - public static byte[] xor(byte[] a, byte[] b, int len) { | |
491 | - if (a == null || a.length == 0 || b == null || b.length == 0) { | |
492 | - return null; | |
493 | - } | |
494 | - if (a.length < len || b.length < len) { | |
495 | - return null; | |
496 | - } | |
497 | - byte[] result = new byte[len]; | |
498 | - for (int i = 0; i < len; i++) { | |
499 | - result[i] = (byte) (a[i] ^ b[i]); | |
500 | - } | |
501 | - return result; | |
502 | - } | |
503 | - /** | |
504 | - * 将short整型数值转换为字节数组 | |
505 | - * | |
506 | - * @param num | |
507 | - * @return | |
508 | - */ | |
509 | - public static byte[] shortToBytes(int num) { | |
510 | - byte[] temp = new byte[2]; | |
511 | - for (int i = 0; i < 2; i++) { | |
512 | - temp[i] = (byte) ((num >>> (8 - i * 8)) & 0xFF); | |
513 | - } | |
514 | - return temp; | |
515 | - } | |
516 | - | |
517 | - /** | |
518 | - * 将字节数组转为整型 | |
519 | - * | |
520 | - * @param arr | |
521 | - * @return | |
522 | - */ | |
523 | - public static int bytesToShort(byte[] arr) { | |
524 | - int mask = 0xFF; | |
525 | - int temp = 0; | |
526 | - int result = 0; | |
527 | - for (int i = 0; i < 2; i++) { | |
528 | - result <<= 8; | |
529 | - temp = arr[i] & mask; | |
530 | - result |= temp; | |
531 | - } | |
532 | - return result; | |
533 | - } | |
534 | - | |
535 | - /** | |
536 | - * 将整型数值转换为指定长度的字节数组 | |
537 | - * | |
538 | - * @param num | |
539 | - * @return | |
540 | - */ | |
541 | - public static byte[] intToBytes(int num) { | |
542 | - byte[] temp = new byte[4]; | |
543 | - for (int i = 0; i < 4; i++) { | |
544 | - temp[i] = (byte) ((num >>> (24 - i * 8)) & 0xFF); | |
545 | - } | |
546 | - return temp; | |
547 | - } | |
548 | - | |
549 | - /** | |
550 | - * 将整型数值转换为指定长度的字节数组 | |
551 | - * | |
552 | - * @param src | |
553 | - * @param len | |
554 | - * @return | |
555 | - */ | |
556 | - public static byte[] intToBytes(int src, int len) { | |
557 | - if (len < 1 || len > 4) { | |
558 | - return null; | |
559 | - } | |
560 | - byte[] temp = new byte[len]; | |
561 | - for (int i = 0; i < len; i++) { | |
562 | - temp[len - 1 - i] = (byte) ((src >>> (8 * i)) & 0xFF); | |
563 | - } | |
564 | - return temp; | |
565 | - } | |
566 | - | |
567 | - /** | |
568 | - * 将字节数组转换为整型数值 | |
569 | - * | |
570 | - * @param arr | |
571 | - * @return | |
572 | - */ | |
573 | - public static int bytesToInt(byte[] arr) { | |
574 | - int mask = 0xFF; | |
575 | - int temp = 0; | |
576 | - int result = 0; | |
577 | - for (int i = 0; i < 4; i++) { | |
578 | - result <<= 8; | |
579 | - temp = arr[i] & mask; | |
580 | - result |= temp; | |
581 | - } | |
582 | - return result; | |
583 | - } | |
584 | - | |
585 | - /** | |
586 | - * 将long整型数值转换为字节数组 | |
587 | - * | |
588 | - * @param num | |
589 | - * @return | |
590 | - */ | |
591 | - public static byte[] longToBytes(long num) { | |
592 | - byte[] temp = new byte[8]; | |
593 | - for (int i = 0; i < 8; i++) { | |
594 | - temp[i] = (byte) ((num >>> (56 - i * 8)) & 0xFF); | |
595 | - } | |
596 | - return temp; | |
597 | - } | |
598 | - | |
599 | - /** | |
600 | - * 将字节数组转换为long整型数值 | |
601 | - * | |
602 | - * @param arr | |
603 | - * @return | |
604 | - */ | |
605 | - public static long bytesToLong(byte[] arr) { | |
606 | - int mask = 0xFF; | |
607 | - int temp = 0; | |
608 | - long result = 0; | |
609 | - int len = Math.min(8, arr.length); | |
610 | - for (int i = 0; i < len; i++) { | |
611 | - result <<= 8; | |
612 | - temp = arr[i] & mask; | |
613 | - result |= temp; | |
614 | - } | |
615 | - return result; | |
616 | - } | |
617 | - | |
618 | - /** | |
619 | - * 将16进制字符转换为字节 | |
620 | - * | |
621 | - * @param c | |
622 | - * @return | |
623 | - */ | |
624 | - public static byte toByte(char c) { | |
625 | - byte b = (byte) "0123456789ABCDEF".indexOf(c); | |
626 | - return b; | |
627 | - } | |
628 | - | |
629 | - /** | |
630 | - * 功能描述:把两个字节的字节数组转化为整型数据,高位补零,例如:<br/> | |
631 | - * 有字节数组byte[] data = new byte[]{1,2};转换后int数据的字节分布如下:<br/> | |
632 | - * 00000000 00000000 00000001 00000010,函数返回258 | |
633 | - * | |
634 | - * @param lenData | |
635 | - * 需要进行转换的字节数组 | |
636 | - * @return 字节数组所表示整型值的大小 | |
637 | - */ | |
638 | - public static int bytesToIntWhereByteLengthEquals2(byte lenData[]) { | |
639 | - if (lenData.length != 2) { | |
640 | - return -1; | |
641 | - } | |
642 | - byte fill[] = new byte[]{0, 0}; | |
643 | - byte real[] = new byte[4]; | |
644 | - System.arraycopy(fill, 0, real, 0, 2); | |
645 | - System.arraycopy(lenData, 0, real, 2, 2); | |
646 | - int len = byteToInt(real); | |
647 | - return len; | |
648 | - | |
649 | - } | |
650 | - | |
651 | - /** | |
652 | - * 功能描述:将byte数组转化为int类型的数据 | |
653 | - * | |
654 | - * @param byteVal | |
655 | - * 需要转化的字节数组 | |
656 | - * @return 字节数组所表示的整型数据 | |
657 | - */ | |
658 | - public static int byteToInt(byte[] byteVal) { | |
659 | - int result = 0; | |
660 | - for (int i = 0; i < byteVal.length; i++) { | |
661 | - int tmpVal = (byteVal[i] << (8 * (3 - i))); | |
662 | - switch (i) { | |
663 | - case 0 : | |
664 | - tmpVal = tmpVal & 0xFF000000; | |
665 | - break; | |
666 | - case 1 : | |
667 | - tmpVal = tmpVal & 0x00FF0000; | |
668 | - break; | |
669 | - case 2 : | |
670 | - tmpVal = tmpVal & 0x0000FF00; | |
671 | - break; | |
672 | - case 3 : | |
673 | - tmpVal = tmpVal & 0x000000FF; | |
674 | - break; | |
675 | - } | |
676 | - | |
677 | - result = result | tmpVal; | |
678 | - } | |
679 | - return result; | |
680 | - } | |
681 | - public static byte CheckXORSum(byte[] bData) { | |
682 | - byte sum = 0x00; | |
683 | - for (int i = 0; i < bData.length; i++) { | |
684 | - sum ^= bData[i]; | |
685 | - } | |
686 | - return sum; | |
687 | - } | |
688 | - /** | |
689 | - * 从offset开始 将后续长度为len的byte字节转为int | |
690 | - * | |
691 | - * @param data | |
692 | - * @param offset | |
693 | - * @param len | |
694 | - * @return | |
695 | - */ | |
696 | - public static int bytesToInt(byte[] data, int offset, int len) { | |
697 | - int mask = 0xFF; | |
698 | - int temp = 0; | |
699 | - int result = 0; | |
700 | - len = Math.min(len, 4); | |
701 | - for (int i = 0; i < len; i++) { | |
702 | - result <<= 8; | |
703 | - temp = data[offset + i] & mask; | |
704 | - result |= temp; | |
705 | - } | |
706 | - return result; | |
707 | - } | |
708 | - | |
709 | - /** | |
710 | - * byte字节数组中的字符串的长度 | |
711 | - * | |
712 | - * @param data | |
713 | - * @return | |
714 | - */ | |
715 | - public static int getBytesStringLen(byte[] data) { | |
716 | - int count = 0; | |
717 | - for (byte b : data) { | |
718 | - if (b == 0x00) | |
719 | - break; | |
720 | - count++; | |
721 | - } | |
722 | - return count; | |
723 | - } | |
724 | - | |
725 | - /** | |
726 | - * 校验和 | |
727 | - * | |
728 | - * @param msg | |
729 | - * 需要计算校验和的byte数组 | |
730 | - * @param length | |
731 | - * 校验和位数 | |
732 | - * @return 计算出的校验和数组 | |
733 | - */ | |
734 | - public static byte[] SumCheck(byte[] msg, int length) { | |
735 | - long mSum = 0; | |
736 | - byte[] mByte = new byte[length]; | |
737 | - | |
738 | - /** 逐Byte添加位数和 */ | |
739 | - for (byte byteMsg : msg) { | |
740 | - long mNum = ((long) byteMsg >= 0) | |
741 | - ? (long) byteMsg | |
742 | - : ((long) byteMsg + 256); | |
743 | - mSum += mNum; | |
744 | - } /** end of for (byte byteMsg : msg) */ | |
745 | - | |
746 | - /** 位数和转化为Byte数组 */ | |
747 | - for (int liv_Count = 0; liv_Count < length; liv_Count++) { | |
748 | - mByte[length - liv_Count | |
749 | - - 1] = (byte) (mSum >> (liv_Count * 8) & 0xff); | |
750 | - } /** end of for (int liv_Count = 0; liv_Count < length; liv_Count++) */ | |
751 | - | |
752 | - return mByte; | |
753 | - } | |
754 | - | |
755 | - /** | |
756 | - * 字节数据转十进制字符(补码-无符号) | |
757 | - * | |
758 | - * @param data | |
759 | - * @return | |
760 | - */ | |
761 | - public static String getByteToStr(byte[] data) { | |
762 | - StringBuffer str = new StringBuffer(); | |
763 | - for (int i = 0; i < data.length; i++) { | |
764 | - if (data[i] < 0) { | |
765 | - int tem = data[i] + 256; | |
766 | - str.append(tem + " "); | |
767 | - } else { | |
768 | - str.append(data[i] + " "); | |
769 | - } | |
770 | - } | |
771 | - return str.toString(); | |
772 | - } | |
773 | - | |
774 | - public static byte[] buf2Bytes(ByteBuf in) { | |
775 | - return buf2Bytes( in, in.readableBytes()) ; | |
776 | - } | |
777 | - public static byte[] buf2Bytes(ByteBuf in,int readable) { | |
778 | - byte[] dst = new byte[readable]; | |
779 | - in.getBytes(0, dst); | |
780 | - return dst; | |
781 | - } | |
782 | - | |
783 | - public static byte[] fileBytes(String pathname) throws IOException { | |
784 | - File filename = new File(pathname); | |
785 | - BufferedInputStream in = new BufferedInputStream(new FileInputStream(filename)); | |
786 | - ByteArrayOutputStream out = new ByteArrayOutputStream(1024); | |
787 | - byte[] temp = new byte[1024]; | |
788 | - int size = 0; | |
789 | - while((size = in.read(temp)) != -1){ | |
790 | - out.write(temp, 0, size); | |
791 | - } | |
792 | - in.close(); | |
793 | - out.close(); | |
794 | - byte[] content = out.toByteArray(); | |
795 | - return content; | |
796 | - } | |
797 | - /** | |
798 | - * 单字节高低位互换 | |
799 | - * @param src | |
800 | - * @return | |
801 | - */ | |
802 | - public static int revert(int src) { | |
803 | - int lowByte = (src & 0xFF00) >> 8; | |
804 | - int highByte = (src & 0x00FF) << 8; | |
805 | - return lowByte | highByte; | |
806 | - } | |
807 | - | |
808 | - /** | |
809 | - * 将字符串编码成16进制数字,适用于所有字符(包括中文) | |
810 | - * @param str 字符串 | |
811 | - * @return | |
812 | - */ | |
813 | - public static String stringEncodeToHex(String str) { | |
814 | - //根据默认编码获取字节数组 | |
815 | - byte[] bytes=str.getBytes(); | |
816 | - StringBuilder sb=new StringBuilder(bytes.length*2); | |
817 | - //将字节数组中每个字节拆解成2位16进制整数 | |
818 | - for(int i=0;i<bytes.length;i++) | |
819 | - { | |
820 | - sb.append(hexString.charAt((bytes[i]&0xf0)>>4)); | |
821 | - sb.append(hexString.charAt((bytes[i]&0x0f)>>0)); | |
822 | - } | |
823 | - return sb.toString(); | |
824 | - | |
825 | - } | |
826 | - | |
827 | - /** | |
828 | - * 将16进制数字解码成字符串,适用于所有字符(包括中文) | |
829 | - * @param hex 16进制 | |
830 | - * @return | |
831 | - */ | |
832 | - public static String hexDecodeToString(String hex) { | |
833 | - try{ | |
834 | - byte[] baKeyword = new byte[hex.length()/2]; | |
835 | - for(int i = 0; i < baKeyword.length; i++) { | |
836 | - baKeyword[i] = (byte)(0xff & Integer.parseInt(hex.substring(i*2, i*2+2),16)); | |
837 | - } | |
838 | - return new String(baKeyword,"UTF-8"); | |
839 | - }catch (UnsupportedEncodingException e){ | |
840 | - return null; | |
841 | - } | |
842 | - } | |
843 | - | |
844 | - public static byte[] hexToByteArray(String inHex){ | |
845 | - inHex.replace(" ",""); | |
846 | - int hexlen = inHex.length(); | |
847 | - byte[] result; | |
848 | - if (hexlen % 2 == 1){ | |
849 | - //奇数 | |
850 | - hexlen++; | |
851 | - result = new byte[(hexlen/2)]; | |
852 | - inHex="0"+inHex; | |
853 | - }else { | |
854 | - //偶数 | |
855 | - result = new byte[(hexlen/2)]; | |
856 | - } | |
857 | - int j=0; | |
858 | - for (int i = 0; i < hexlen; i+=2){ | |
859 | - result[j]=hexToByte(inHex.substring(i,i+2)); | |
860 | - j++; | |
861 | - } | |
862 | - return result; | |
863 | - } | |
864 | - public static byte hexToByte(String inHex){ | |
865 | - return (byte)Integer.parseInt(inHex,16); | |
866 | - } | |
867 | -} |