脚本之家,脚本语言编程技术及教程分享平台!
分类导航

Python|VBS|Ruby|Lua|perl|VBA|Golang|PowerShell|Erlang|autoit|Dos|bat|

服务器之家 - 脚本之家 - Golang - golang 将[]byte转成16进制的实现

golang 将[]byte转成16进制的实现

2021-03-04 00:51-缘故- Golang

这篇文章主要介绍了golang 将[]byte转成16进制的实现,具有很好的参考价值,希望对大家有所帮助。一起跟随小编过来看看吧

将[]byte转成16进制

?
1
2
3
4
import "crypto/md5"
import "fmt"
sign := md5.Sum([]byte("date string"))
signStr := fmt.Sprintf("%x", sign) //将[]byte转成16进制

补充:golang []byte存储存储的16进制转10进制

项目中有用[]byte存储16进制需要转到10进制,如果用系统自带的函数处理,需要先将[]byte通过hex.EncodeToString转为string,再用strconv.ParseInt转到10进制,过程中由于两次转换导致内存分配过多(每秒执行近100w次),GC出现错误导致进程挂掉。

自己写了一个函数来转,主要是避免出现内存泄漏:

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
var b2m_map map[byte]uint64 = map[byte]uint64{
    0x00: 0,
    0x01: 1,
    0x02: 2,
    0x03: 3,
    0x04: 4,
    0x05: 5,
    0x06: 6,
    0x07: 7,
    0x08: 8,
    0x09: 9,
    0x0A: 10,
    0x0B: 11,
    0x0C: 12,
    0x0D: 13,
    0x0E: 14,
    0x0F: 15,
    0x10: 16,
    0x11: 17,
    0x12: 18,
    0x13: 19,
    0x14: 20,
    0x15: 21,
    0x16: 22,
    0x17: 23,
    0x18: 24,
    0x19: 25,
    0x1A: 26,
    0x1B: 27,
    0x1C: 28,
    0x1D: 29,
    0x1E: 30,
    0x1F: 31,
    0x20: 32,
    0x21: 33,
    0x22: 34,
    0x23: 35,
    0x24: 36,
    0x25: 37,
    0x26: 38,
    0x27: 39,
    0x28: 40,
    0x29: 41,
    0x2A: 42,
    0x2B: 43,
    0x2C: 44,
    0x2D: 45,
    0x2E: 46,
    0x2F: 47,
    0x30: 48,
    0x31: 49,
    0x32: 50,
    0x33: 51,
    0x34: 52,
    0x35: 53,
    0x36: 54,
    0x37: 55,
    0x38: 56,
    0x39: 57,
    0x3A: 58,
    0x3B: 59,
    0x3C: 60,
    0x3D: 61,
    0x3E: 62,
    0x3F: 63,
    0x40: 64,
    0x41: 65,
    0x42: 66,
    0x43: 67,
    0x44: 68,
    0x45: 69,
    0x46: 70,
    0x47: 71,
    0x48: 72,
    0x49: 73,
    0x4A: 74,
    0x4B: 75,
    0x4C: 76,
    0x4D: 77,
    0x4E: 78,
    0x4F: 79,
    0x50: 80,
    0x51: 81,
    0x52: 82,
    0x53: 83,
    0x54: 84,
    0x55: 85,
    0x56: 86,
    0x57: 87,
    0x58: 88,
    0x59: 89,
    0x5A: 90,
    0x5B: 91,
    0x5C: 92,
    0x5D: 93,
    0x5E: 94,
    0x5F: 95,
    0x60: 96,
    0x61: 97,
    0x62: 98,
    0x63: 99,
    0x64: 100,
    0x65: 101,
    0x66: 102,
    0x67: 103,
    0x68: 104,
    0x69: 105,
    0x6A: 106,
    0x6B: 107,
    0x6C: 108,
    0x6D: 109,
    0x6E: 110,
    0x6F: 111,
    0x70: 112,
    0x71: 113,
    0x72: 114,
    0x73: 115,
    0x74: 116,
    0x75: 117,
    0x76: 118,
    0x77: 119,
    0x78: 120,
    0x79: 121,
    0x7A: 122,
    0x7B: 123,
    0x7C: 124,
    0x7D: 125,
    0x7E: 126,
    0x7F: 127,
    0x80: 128,
    0x81: 129,
    0x82: 130,
    0x83: 131,
    0x84: 132,
    0x85: 133,
    0x86: 134,
    0x87: 135,
    0x88: 136,
    0x89: 137,
    0x8A: 138,
    0x8B: 139,
    0x8C: 140,
    0x8D: 141,
    0x8E: 142,
    0x8F: 143,
    0x90: 144,
    0x91: 145,
    0x92: 146,
    0x93: 147,
    0x94: 148,
    0x95: 149,
    0x96: 150,
    0x97: 151,
    0x98: 152,
    0x99: 153,
    0x9A: 154,
    0x9B: 155,
    0x9C: 156,
    0x9D: 157,
    0x9E: 158,
    0x9F: 159,
    0xA0: 160,
    0xA1: 161,
    0xA2: 162,
    0xA3: 163,
    0xA4: 164,
    0xA5: 165,
    0xA6: 166,
    0xA7: 167,
    0xA8: 168,
    0xA9: 169,
    0xAA: 170,
    0xAB: 171,
    0xAC: 172,
    0xAD: 173,
    0xAE: 174,
    0xAF: 175,
    0xB0: 176,
    0xB1: 177,
    0xB2: 178,
    0xB3: 179,
    0xB4: 180,
    0xB5: 181,
    0xB6: 182,
    0xB7: 183,
    0xB8: 184,
    0xB9: 185,
    0xBA: 186,
    0xBB: 187,
    0xBC: 188,
    0xBD: 189,
    0xBE: 190,
    0xBF: 191,
    0xC0: 192,
    0xC1: 193,
    0xC2: 194,
    0xC3: 195,
    0xC4: 196,
    0xC5: 197,
    0xC6: 198,
    0xC7: 199,
    0xC8: 200,
    0xC9: 201,
    0xCA: 202,
    0xCB: 203,
    0xCC: 204,
    0xCD: 205,
    0xCE: 206,
    0xCF: 207,
    0xD0: 208,
    0xD1: 209,
    0xD2: 210,
    0xD3: 211,
    0xD4: 212,
    0xD5: 213,
    0xD6: 214,
    0xD7: 215,
    0xD8: 216,
    0xD9: 217,
    0xDA: 218,
    0xDB: 219,
    0xDC: 220,
    0xDD: 221,
    0xDE: 222,
    0xDF: 223,
    0xE0: 224,
    0xE1: 225,
    0xE2: 226,
    0xE3: 227,
    0xE4: 228,
    0xE5: 229,
    0xE6: 230,
    0xE7: 231,
    0xE8: 232,
    0xE9: 233,
    0xEA: 234,
    0xEB: 235,
    0xEC: 236,
    0xED: 237,
    0xEE: 238,
    0xEF: 239,
    0xF0: 240,
    0xF1: 241,
    0xF2: 242,
    0xF3: 243,
    0xF4: 244,
    0xF5: 245,
    0xF6: 246,
    0xF7: 247,
    0xF8: 248,
    0xF9: 249,
    0xFA: 250,
    0xFB: 251,
    0xFC: 252,
    0xFD: 253,
    0xFE: 254,
    0xFF: 255,
}
func hex2int(hexB *[]byte) uint64 {
    var retInt uint64
    hexLen := len(*hexB)
    for k, v := range *hexB {
        retInt += b2m_map[v] * exponent(16, uint64(2*(hexLen-k-1)))
    }
    return retInt
}
func exponent(a, n uint64) uint64 {
    result := uint64(1)
    for i := n; i > 0; i >>= 1 {
        if i&1 != 0 {
            result *= a
        }
        a *= a
    }
    return result
}

经过测试,性能和自带的方法接近,略有提升。

?
1
2
3
4
5
6
7
goos: windows
goarch: amd64
pkg: benchmark
Benchmark_General-4     10000000        144 ns/op
Benchmark_Better-4      10000000        128 ns/op
PASS
ok  benchmark   3.086s

以上为个人经验,希望能给大家一个参考,也希望大家多多支持服务器之家。如有错误或未考虑完全的地方,望不吝赐教。

原文链接:https://blog.csdn.net/wangmanjie/article/details/85244958

延伸 · 阅读

精彩推荐
  • Golanggo语言制作端口扫描器

    go语言制作端口扫描器

    本文给大家分享的是使用go语言编写的TCP端口扫描器,可以选择IP范围,扫描的端口,以及多线程,有需要的小伙伴可以参考下。 ...

    脚本之家3642020-04-25
  • Golanggolang的httpserver优雅重启方法详解

    golang的httpserver优雅重启方法详解

    这篇文章主要给大家介绍了关于golang的httpserver优雅重启的相关资料,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,...

    helight2992020-05-14
  • Golanggo日志系统logrus显示文件和行号的操作

    go日志系统logrus显示文件和行号的操作

    这篇文章主要介绍了go日志系统logrus显示文件和行号的操作,具有很好的参考价值,希望对大家有所帮助。一起跟随小编过来看看吧...

    SmallQinYan12302021-02-02
  • Golanggolang如何使用struct的tag属性的详细介绍

    golang如何使用struct的tag属性的详细介绍

    这篇文章主要介绍了golang如何使用struct的tag属性的详细介绍,从例子说起,小编觉得挺不错的,现在分享给大家,也给大家做个参考。一起跟随小编过来看...

    Go语言中文网11352020-05-21
  • Golanggolang json.Marshal 特殊html字符被转义的解决方法

    golang json.Marshal 特殊html字符被转义的解决方法

    今天小编就为大家分享一篇golang json.Marshal 特殊html字符被转义的解决方法,具有很好的参考价值,希望对大家有所帮助。一起跟随小编过来看看吧 ...

    李浩的life12792020-05-27
  • GolangGolang中Bit数组的实现方式

    Golang中Bit数组的实现方式

    这篇文章主要介绍了Golang中Bit数组的实现方式,具有很好的参考价值,希望对大家有所帮助。一起跟随小编过来看看吧...

    天易独尊11682021-06-09
  • Golanggolang 通过ssh代理连接mysql的操作

    golang 通过ssh代理连接mysql的操作

    这篇文章主要介绍了golang 通过ssh代理连接mysql的操作,具有很好的参考价值,希望对大家有所帮助。一起跟随小编过来看看吧...

    a165861639710342021-03-08
  • GolangGolang通脉之数据类型详情

    Golang通脉之数据类型详情

    这篇文章主要介绍了Golang通脉之数据类型,在编程语言中标识符就是定义的具有某种意义的词,比如变量名、常量名、函数名等等,Go语言中标识符允许由...

    4272021-11-24