{"id":2053,"date":"2025-02-26T23:13:55","date_gmt":"2025-02-26T15:13:55","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2053"},"modified":"2025-02-26T23:13:55","modified_gmt":"2025-02-26T15:13:55","slug":"javascript-%e6%ad%a3%e5%88%99%e8%a1%a8%e8%be%be%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/02\/26\/javascript-%e6%ad%a3%e5%88%99%e8%a1%a8%e8%be%be%e5%bc%8f\/","title":{"rendered":"JavaScript \u6b63\u5219\u8868\u8fbe\u5f0f"},"content":{"rendered":"\n<p>\u6b63\u5219\u8868\u8fbe\u5f0f\uff08Regular Expression\uff0c\u7b80\u79f0 regex \u6216 regexp\uff09\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u6a21\u5f0f\u5339\u914d\u5de5\u5177\uff0c\u7528\u4e8e\u5728\u5b57\u7b26\u4e32\u4e2d\u6267\u884c\u67e5\u627e\u3001\u66ff\u6362\u3001\u5339\u914d\u7b49\u64cd\u4f5c\u3002JavaScript \u63d0\u4f9b\u4e86\u5185\u5efa\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u652f\u6301\uff0c\u53ef\u4ee5\u901a\u8fc7\u6b63\u5219\u8868\u8fbe\u5f0f\u6a21\u5f0f\u8fdb\u884c\u5b57\u7b26\u4e32\u7684\u5339\u914d\u548c\u5904\u7406\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. \u6b63\u5219\u8868\u8fbe\u5f0f\u57fa\u7840<\/strong><\/h3>\n\n\n\n<p>\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u57fa\u672c\u7ed3\u6784\u662f\u7531\u7279\u6b8a\u5b57\u7b26\u548c\u5e38\u89c4\u5b57\u7b26\u7ec4\u6210\uff0c\u7528\u4e8e\u63cf\u8ff0\u5b57\u7b26\u4e32\u6a21\u5f0f\u3002\u53ef\u4ee5\u901a\u8fc7\u4e24\u79cd\u65b9\u5f0f\u521b\u5efa\u6b63\u5219\u8868\u8fbe\u5f0f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5b57\u9762\u91cf\u65b9\u5f0f<\/strong>\uff1a\u4f7f\u7528\u659c\u6760 <code>\/<\/code> \u5305\u88f9\u6b63\u5219\u8868\u8fbe\u5f0f\u3002<\/li>\n\n\n\n<li><strong>\u6784\u9020\u51fd\u6570\u65b9\u5f0f<\/strong>\uff1a\u4f7f\u7528 <code>RegExp<\/code> \u6784\u9020\u51fd\u6570\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u793a\u4f8b\uff1a\u5b57\u9762\u91cf\u65b9\u5f0f<\/strong><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>let regex = \/abc\/;<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u793a\u4f8b\uff1a\u6784\u9020\u51fd\u6570\u65b9\u5f0f<\/strong><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>let regex = new RegExp('abc');<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. \u6b63\u5219\u8868\u8fbe\u5f0f\u5e38\u7528\u5b57\u7b26<\/strong><\/h3>\n\n\n\n<p>\u6b63\u5219\u8868\u8fbe\u5f0f\u4e2d\u6709\u5f88\u591a\u7279\u6b8a\u5b57\u7b26\uff0c\u4e0b\u9762\u5217\u51fa\u4e00\u4e9b\u5e38\u89c1\u7684\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>.<\/code><\/strong>\uff1a\u5339\u914d\u4efb\u4f55\u5355\u4e2a\u5b57\u7b26\uff08\u9664\u4e86\u6362\u884c\u7b26\uff09\u3002<\/li>\n\n\n\n<li><strong><code>^<\/code><\/strong>\uff1a\u5339\u914d\u5b57\u7b26\u4e32\u7684\u5f00\u5934\u3002<\/li>\n\n\n\n<li><strong><code>$<\/code><\/strong>\uff1a\u5339\u914d\u5b57\u7b26\u4e32\u7684\u7ed3\u5c3e\u3002<\/li>\n\n\n\n<li><strong><code>*<\/code><\/strong>\uff1a\u5339\u914d\u524d\u9762\u7684\u8868\u8fbe\u5f0f\u96f6\u6b21\u6216\u591a\u6b21\u3002<\/li>\n\n\n\n<li><strong><code>+<\/code><\/strong>\uff1a\u5339\u914d\u524d\u9762\u7684\u8868\u8fbe\u5f0f\u4e00\u6b21\u6216\u591a\u6b21\u3002<\/li>\n\n\n\n<li><strong><code>?<\/code><\/strong>\uff1a\u5339\u914d\u524d\u9762\u7684\u8868\u8fbe\u5f0f\u96f6\u6b21\u6216\u4e00\u6b21\u3002<\/li>\n\n\n\n<li><strong><code>[]<\/code><\/strong>\uff1a\u5b57\u7b26\u7c7b\uff0c\u5339\u914d\u65b9\u62ec\u53f7\u4e2d\u7684\u4efb\u4f55\u4e00\u4e2a\u5b57\u7b26\u3002<\/li>\n\n\n\n<li><strong><code>|<\/code><\/strong>\uff1a\u8868\u793a\u201c\u6216\u201d\uff0c\u7528\u4e8e\u5206\u9694\u591a\u4e2a\u9009\u9879\u3002<\/li>\n\n\n\n<li><strong><code>()<\/code><\/strong>\uff1a\u5206\u7ec4\uff0c\u5339\u914d\u5e76\u63d0\u53d6\u5206\u7ec4\u5185\u7684\u5185\u5bb9\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u793a\u4f8b\uff1a\u4f7f\u7528\u7279\u6b8a\u5b57\u7b26<\/strong><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>let regex = \/a.b\/;  \/\/ \u5339\u914d \"a\" \u540e\u9762\u8ddf\u7740\u4efb\u610f\u4e00\u4e2a\u5b57\u7b26\u518d\u8ddf\u7740 \"b\"\nconsole.log(regex.test(\"acb\"));  \/\/ \u8f93\u51fa true\nconsole.log(regex.test(\"abc\"));  \/\/ \u8f93\u51fa true\nconsole.log(regex.test(\"ab\"));   \/\/ \u8f93\u51fa false<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3. \u6b63\u5219\u8868\u8fbe\u5f0f\u4fee\u9970\u7b26<\/strong><\/h3>\n\n\n\n<p>\u6b63\u5219\u8868\u8fbe\u5f0f\u53ef\u4ee5\u5e26\u6709\u4fee\u9970\u7b26\uff0c\u5f71\u54cd\u5339\u914d\u884c\u4e3a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>g<\/code><\/strong>\uff1a\u5168\u5c40\u5339\u914d\uff0c\u5339\u914d\u6240\u6709\u7b26\u5408\u6761\u4ef6\u7684\u5b50\u5b57\u7b26\u4e32\u3002<\/li>\n\n\n\n<li><strong><code>i<\/code><\/strong>\uff1a\u4e0d\u533a\u5206\u5927\u5c0f\u5199\u5339\u914d\u3002<\/li>\n\n\n\n<li><strong><code>m<\/code><\/strong>\uff1a\u591a\u884c\u5339\u914d\uff0c\u4f7f <code>^<\/code> \u548c <code>$<\/code> \u5339\u914d\u6bcf\u4e00\u884c\u7684\u5f00\u59cb\u548c\u7ed3\u675f\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u793a\u4f8b\uff1a\u4f7f\u7528\u4fee\u9970\u7b26<\/strong><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>let regex = \/hello\/i;  \/\/ \u4e0d\u533a\u5206\u5927\u5c0f\u5199\nconsole.log(regex.test(\"HELLO\"));  \/\/ \u8f93\u51fa true<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>let regex = \/a.b\/g;  \/\/ \u5168\u5c40\u5339\u914d\nlet str = \"aab abc a4b\";\nconsole.log(str.match(regex));  \/\/ \u8f93\u51fa &#91;\"aab\", \"abc\", \"a4b\"]<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>4. \u5e38\u7528\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u65b9\u6cd5<\/strong><\/h3>\n\n\n\n<p>JavaScript \u63d0\u4f9b\u4e86\u51e0\u79cd\u5e38\u7528\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u65b9\u6cd5\uff0c\u6700\u5e38\u7528\u7684\u5305\u62ec\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>test()<\/code><\/strong>\uff1a\u6d4b\u8bd5\u4e00\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u7b26\u5408\u6b63\u5219\u8868\u8fbe\u5f0f\u3002<\/li>\n\n\n\n<li><strong><code>exec()<\/code><\/strong>\uff1a\u6267\u884c\u4e00\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\uff0c\u8fd4\u56de\u5339\u914d\u5230\u7684\u5185\u5bb9\u3002<\/li>\n\n\n\n<li><strong><code>match()<\/code><\/strong>\uff1a\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\uff0c\u8fd4\u56de\u5339\u914d\u7684\u7ed3\u679c\u3002<\/li>\n\n\n\n<li><strong><code>replace()<\/code><\/strong>\uff1a\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\uff0c\u7528\u4e8e\u66ff\u6362\u5339\u914d\u7684\u5185\u5bb9\u3002<\/li>\n\n\n\n<li><strong><code>split()<\/code><\/strong>\uff1a\u5c06\u5b57\u7b26\u4e32\u6309\u5339\u914d\u7684\u6a21\u5f0f\u5206\u5272\u6210\u6570\u7ec4\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u793a\u4f8b\uff1a\u4f7f\u7528 <code>test()<\/code><\/strong><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>let regex = \/abc\/;\nconsole.log(regex.test(\"abcdef\"));  \/\/ \u8f93\u51fa true\nconsole.log(regex.test(\"xyz\"));     \/\/ \u8f93\u51fa false<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u793a\u4f8b\uff1a\u4f7f\u7528 <code>exec()<\/code><\/strong><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>let regex = \/a(b)c\/;\nlet result = regex.exec(\"abc\");\nconsole.log(result);  \/\/ \u8f93\u51fa &#91;\"abc\", \"b\"]<\/code><\/pre>\n\n\n\n<p><code>exec()<\/code> \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u5339\u914d\u7684\u6587\u672c\u53ca\u6240\u6709\u6355\u83b7\u7684\u5206\u7ec4\u3002\u5982\u679c\u6ca1\u6709\u5339\u914d\u9879\uff0c\u5219\u8fd4\u56de <code>null<\/code>\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u793a\u4f8b\uff1a\u4f7f\u7528 <code>match()<\/code><\/strong><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>let str = \"The quick brown fox jumps over the lazy dog\";\nlet regex = \/the\/gi;  \/\/ \u4e0d\u533a\u5206\u5927\u5c0f\u5199\uff0c\u5339\u914d\u6240\u6709 \"the\"\nconsole.log(str.match(regex));  \/\/ \u8f93\u51fa &#91;\"The\", \"the\"]<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u793a\u4f8b\uff1a\u4f7f\u7528 <code>replace()<\/code><\/strong><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>let str = \"Hello, World!\";\nlet regex = \/World\/;\nlet newStr = str.replace(regex, \"JavaScript\");\nconsole.log(newStr);  \/\/ \u8f93\u51fa \"Hello, JavaScript!\"<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u793a\u4f8b\uff1a\u4f7f\u7528 <code>split()<\/code><\/strong><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>let str = \"apple,banana,orange\";\nlet regex = \/,\/;\nlet arr = str.split(regex);\nconsole.log(arr);  \/\/ \u8f93\u51fa &#91;\"apple\", \"banana\", \"orange\"]<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>5. \u6355\u83b7\u7ec4\u548c\u53cd\u5411\u5f15\u7528<\/strong><\/h3>\n\n\n\n<p>\u6b63\u5219\u8868\u8fbe\u5f0f\u4e2d\u7684\u6355\u83b7\u7ec4\u7528\u5706\u62ec\u53f7 <code>()<\/code> \u62ec\u8d77\u6765\u3002\u5b83\u5141\u8bb8\u4f60\u6355\u83b7\u5339\u914d\u5230\u7684\u90e8\u5206\uff0c\u5e76\u5728\u4e4b\u540e\u7684\u66ff\u6362\u6216\u63d0\u53d6\u64cd\u4f5c\u4e2d\u4f7f\u7528\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6355\u83b7\u7ec4<\/strong>\uff1a\u5728\u6b63\u5219\u8868\u8fbe\u5f0f\u4e2d\u4f7f\u7528\u5706\u62ec\u53f7 <code>()<\/code> \u6765\u5b9a\u4e49\u4e00\u4e2a\u6355\u83b7\u7ec4\u3002<\/li>\n\n\n\n<li><strong>\u53cd\u5411\u5f15\u7528<\/strong>\uff1a\u4f60\u53ef\u4ee5\u901a\u8fc7 <code>$1<\/code>, <code>$2<\/code> \u7b49\u6765\u5f15\u7528\u6355\u83b7\u7ec4\u4e2d\u7684\u5185\u5bb9\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u793a\u4f8b\uff1a\u4f7f\u7528\u6355\u83b7\u7ec4<\/strong><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>let regex = \/(\\d{4})-(\\d{2})-(\\d{2})\/;\nlet date = \"2023-02-26\";\nlet result = regex.exec(date);\nconsole.log(result);  \/\/ \u8f93\u51fa &#91;\"2023-02-26\", \"2023\", \"02\", \"26\"]<\/code><\/pre>\n\n\n\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c<code>(\\d{4})<\/code> \u6355\u83b7\u5e74\u4efd\uff0c<code>(\\d{2})<\/code> \u6355\u83b7\u6708\u4efd\u548c\u65e5\u671f\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u793a\u4f8b\uff1a\u4f7f\u7528\u53cd\u5411\u5f15\u7528<\/strong><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>let regex = \/(\\d{4})-(\\d{2})-(\\d{2})\/;\nlet date = \"2023-02-26\";\nlet newDate = date.replace(regex, \"$3\/$2\/$1\");\nconsole.log(newDate);  \/\/ \u8f93\u51fa \"26\/02\/2023\"<\/code><\/pre>\n\n\n\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u53cd\u5411\u5f15\u7528 <code>$3<\/code>, <code>$2<\/code>, <code>$1<\/code> \u5206\u522b\u6307\u4ee3\u65e5\u671f\u3001\u6708\u4efd\u548c\u5e74\u4efd\uff0c\u5c06\u65e5\u671f\u683c\u5f0f\u4ece <code>yyyy-mm-dd<\/code> \u8f6c\u6362\u4e3a <code>dd\/mm\/yyyy<\/code>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>6. \u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u5e38\u89c1\u7528\u9014<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u9a8c\u8bc1\u7535\u5b50\u90ae\u4ef6\u5730\u5740<\/strong>\uff1a\u68c0\u67e5\u8f93\u5165\u662f\u5426\u4e3a\u6709\u6548\u7684\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u3002<\/li>\n\n\n\n<li><strong>\u9a8c\u8bc1\u7535\u8bdd\u53f7\u7801<\/strong>\uff1a\u68c0\u67e5\u7535\u8bdd\u53f7\u7801\u7684\u683c\u5f0f\u3002<\/li>\n\n\n\n<li><strong>\u67e5\u627e\u548c\u66ff\u6362\u6587\u672c<\/strong>\uff1a\u4ece\u5b57\u7b26\u4e32\u4e2d\u67e5\u627e\u5339\u914d\u7684\u5185\u5bb9\u5e76\u8fdb\u884c\u66ff\u6362\u3002<\/li>\n\n\n\n<li><strong>\u63d0\u53d6\u6570\u636e<\/strong>\uff1a\u4ece\u5b57\u7b26\u4e32\u4e2d\u63d0\u53d6\u7279\u5b9a\u7684\u4fe1\u606f\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u793a\u4f8b\uff1a\u9a8c\u8bc1\u7535\u5b50\u90ae\u4ef6\u5730\u5740<\/strong><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>let email = \"test@example.com\";\nlet regex = \/^&#91;a-zA-Z0-9._-]+@&#91;a-zA-Z0-9.-]+\\.&#91;a-zA-Z]{2,6}$\/;\nconsole.log(regex.test(email));  \/\/ \u8f93\u51fa true<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u603b\u7ed3<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6b63\u5219\u8868\u8fbe\u5f0f<\/strong> \u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u7528\u4e8e\u5904\u7406\u5b57\u7b26\u4e32\u5339\u914d\u3001\u63d0\u53d6\u548c\u66ff\u6362\u3002<\/li>\n\n\n\n<li>\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u65f6\uff0c\u53ef\u4ee5\u5229\u7528\u5404\u79cd\u5143\u5b57\u7b26\u6765\u5b9a\u4e49\u5339\u914d\u6a21\u5f0f\uff0c\u5982 <code>.<\/code>\u3001<code>*<\/code>\u3001<code>+<\/code>\u3001<code>[]<\/code>\u3001<code>()<\/code> \u7b49\u3002<\/li>\n\n\n\n<li>JavaScript \u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u6cd5\u6765\u4e0e\u6b63\u5219\u8868\u8fbe\u5f0f\u4ea4\u4e92\uff0c\u5982 <code>test()<\/code>\u3001<code>exec()<\/code>\u3001<code>match()<\/code>\u3001<code>replace()<\/code> \u548c <code>split()<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u66f4\u591a\u8be6\u7ec6\u4fe1\u606f\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6b63\u5219\u8868\u8fbe\u5f0f\uff08Regular Expression\uff0c\u7b80\u79f0 regex \u6216 regexp\uff09\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u6a21\u5f0f\u5339\u914d\u5de5\u5177 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[],"class_list":["post-2053","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2053","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=2053"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2053\/revisions"}],"predecessor-version":[{"id":2054,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2053\/revisions\/2054"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2053"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2053"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2053"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}