寻找正则表达式

目前，我得到这个：寻找正则表达式

/^[0-9]{1,3}$/\.{1}/^[0-9]{1,3}$/\.{1}^[0-9]{1,3}$/

应该接受以下：

0.0.0
00.00.00
000.000.000

它不应该接受：

000.000.0000
0000.000.000
000.0000.000
.0.0
0..0
等

来源

2012-05-03 DaMaGeX

是否所有的数字需要是相同的，或它是否只是每个组中需要相同的数字*号？即'1.1.1'应该可以，但是'1.2.3'？（相应地编辑你的问题，而不是回复这个评论） –

这些应该是RGB值，所以从0到255 – DaMaGeX

^([2][5][0-5]|[2][0-4][0-9]|[1][0-9]{2}|[1-9][0-9]|[0-9])[.]([2][5][0-5]|[2][0-4][0-9]|[1][0-9]{2}|[1-9][0-9]|[0-9]).([2][5][0-5]|[2][0-4][0-9]|[1][0-9]{2}|[1-9][0-9]|[0-9])$

我测试对以下内容：

0.0.0 
1.3.2 
2.6.4 
3.9.6 
4.12.8 
5.15.10 
6.18.12 
7.21.14 
8.24.16 
9.27.18 
10.30.20 
11.33.22 
12.36.24 
13.39.26 
14.42.28 
15.45.30 
16.48.32 
17.51.34 
18.54.36 
19.57.38 
20.60.40 
21.63.42 
22.66.44 
23.69.46 
24.72.48 
25.75.50 
26.78.52 
27.81.54 
28.84.56 
29.87.58 
30.90.60 
31.93.62 
32.96.64 
33.99.66 
34.102.68 
35.105.70 
36.108.72 
37.111.74 
38.114.76 
39.117.78 
40.120.80 
41.123.82 
42.126.84 
43.129.86 
44.132.88 
45.135.90 
46.138.92 
47.141.94 
48.144.96 
49.147.98 
50.150.100 
51.153.102 
52.156.104 
53.159.106 
54.162.108 
55.165.110 
56.168.112 
57.171.114 
58.174.116 
59.177.118 
60.180.120 
61.183.122 
62.186.124 
63.189.126 
64.192.128 
65.195.130 
66.198.132 
67.201.134 
68.204.136 
69.207.138 
70.210.140 
71.213.142 
72.216.144 
73.219.146 
74.222.148 
75.225.150 
76.228.152 
77.231.154 
78.234.156 
79.237.158 
80.240.160 
81.243.162 
82.246.164 
83.249.166 
84.252.168 
255.255.255 
1.2.3 
87.261.174 
88.264.176 
89.267.178 
90.270.180 
91.273.182 
92.276.184 
93.279.186 
94.282.188 
95.285.190 
96.288.192 
97.291.194 
98.294.196 
99.297.198 
100.300.200 
101.303.202 
102.306.204 
103.309.206 
104.312.208 
105.315.210 
106.318.212 
107.321.214 
108.324.216 
109.327.218 
110.330.220 
111.333.222 
112.336.224 
113.339.226 
114.342.228 
115.345.230 
116.348.232 
117.351.234 
118.354.236 
119.357.238 
120.360.240 
121.363.242 
122.366.244 
123.369.246 
124.372.248 
125.375.250 
126.378.252 
127.381.254 
128.384.256 
129.387.258 
130.390.260 
131.393.262 
132.396.264 
133.399.266 
134.402.268 
135.405.270 
136.408.272 
137.411.274 
138.414.276 
139.417.278 
140.420.280 
141.423.282 
142.426.284 
143.429.286 
144.432.288 
145.435.290 
146.438.292 
147.441.294 
148.444.296 
149.447.298 
150.450.300 
151.453.302 
152.456.304 
153.459.306 
154.462.308 
155.465.310 
156.468.312 
157.471.314 
158.474.316 
159.477.318 
160.480.320 
161.483.322 
162.486.324 
163.489.326 
164.492.328 
165.495.330 
166.498.332 
167.501.334 
168.504.336 
169.507.338 
170.510.340 
171.513.342 
172.516.344 
173.519.346 
174.522.348 
175.525.350 
176.528.352 
177.531.354 
178.534.356 
179.537.358 
180.540.360 
181.543.362 
182.546.364 
183.549.366 
184.552.368 
185.555.370 
186.558.372 
187.561.374 
188.564.376 
189.567.378 
190.570.380 
191.573.382 
192.576.384 
193.579.386 
194.582.388 
195.585.390 
196.588.392 
197.591.394 
198.594.396 
199.597.398 
200.600.400 
201.603.402 
202.606.404 
203.609.406 
204.612.408 
205.615.410 
206.618.412 
207.621.414 
208.624.416 
209.627.418 
210.630.420 
211.633.422 
212.636.424 
213.639.426 
214.642.428 
215.645.430 
216.648.432 
217.651.434 
218.654.436 
219.657.438 
220.660.440 
221.663.442 
222.666.444 
223.669.446 
224.672.448 
225.675.450 
226.678.452 
227.681.454 
228.684.456 
229.687.458 
230.690.460 
231.693.462 
232.696.464 
233.699.466 
234.702.468 
235.705.470 
236.708.472 
237.711.474 
238.714.476 
239.717.478 
240.720.480 
241.723.482 
242.726.484 
243.729.486 
244.732.488 
245.735.490 
246.738.492 
247.741.494 
248.744.496 
249.747.498 
250.750.500 
251.753.502 
252.756.504 
253.759.506 
254.762.508 
255.765.510 
256.768.512 
257.771.514 
258.774.516 
259.777.518 
260.780.520 
261.783.522 
262.786.524 
263.789.526 
264.792.528 
265.795.530 
266.798.532 
267.801.534 
268.804.536 
269.807.538 
270.810.540 
271.813.542 
225.816.5441 
273.819.546 
274.8221.548 
2725.8252.550

来源

2012-05-03 19:29:32 LCarter

试试这个：

^(0+)(\.\1){2}$

含义：

^  # the start of the input 
(0+)  # match one ore more `0`'s and store it in group 1 
(  # start group 2 
    \.\1 # match a literal `.` and match whatever group 1 matched 
){2}  # end group 2 and repeat it twice 
$  # the end of the input

如果你只需要最多3个数字3块，这样做：

^\d{1,3}(\.\d{1,3}){2}$

或

^\d{1,3}\.\d{1,3}\.\d{1,3}$

注意，这也将匹配"777.888.999"，但使用正则表达式验证数字范围不是正则表达式的意义。

来源

2012-05-03 11:27:22

你有几个问题你的模式

/^[0-9]{1,3}$/.{1}/^[0-9]{1,3}$/.{1}^[0-9]{1,3}$/

^是字符串，$为末开始的锚。
为了逃避特殊字符使用反斜杠
{1}是多余的。

因此，我们会在这里结束：

^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$

见it on Regexr

但这仅检查模式！它也会接受例如000,256和999，但匹配一定的数字范围是困难的，并且需要更复杂的正则表达式。

也检查范围的模式，看起来像这样（我只做了一个快速测试！）

^(?:\d|[1-9]\d|1\d{2}|2[0-4]\d|25[0-5])(?:.(?:\d|[1-9]\d|1\d{2}|2[0-4]\d|25[0-5])){2}$

见it on Regexr

我不建议这样做它的方式！

来源

2012-05-03 11:48:49 stema

-2

如果你想匹配的RGB值，则使用范围：

^[0-256]{1,3}(\.[0-256]{1,3}){2}$

来源

2012-05-03 14:21:41

这将不起作用，因为第一部分说给我一个范围0-2和匹配字符5和6; 1至3次。 0,1,2,5,6将是匹配的唯一数字33不匹配或199. – LCarter

你是对的，我的错误。 –

寻找正则表达式

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