{"id":223,"date":"2021-11-14T00:42:21","date_gmt":"2021-11-13T16:42:21","guid":{"rendered":"https:\/\/www.langsasec.cn\/?p=223"},"modified":"2022-02-16T12:13:00","modified_gmt":"2022-02-16T04:13:00","slug":"regexp","status":"publish","type":"post","link":"https:\/\/blog.langsasec.cn\/index.php\/2021\/11\/14\/regexp\/","title":{"rendered":"Web\u6e17\u900f\u57fa\u7840\u4e4b\u6b63\u5219\u8868\u8fbe\u5f0f"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5b66\u4e60\u6b63\u5219\u8868\u8fbe\u5f0f\u53ef\u4ee5\u53c2\u8003\u83dc\u9e1f\u6559\u7a0b\u548cW3c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u4ec0\u4e48\u662f\u6b63\u5219\u8868\u8fbe\u5f0f\"><span class=\"ez-toc-section\" id=\"%e4%bb%80%e4%b9%88%e6%98%af%e6%ad%a3%e5%88%99%e8%a1%a8%e8%be%be%e5%bc%8f%ef%bc%9f\"><\/span>\u4ec0\u4e48\u662f\u6b63\u5219\u8868\u8fbe\u5f0f\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"has-normal-font-size wp-block-paragraph\">\u6b63\u5219\u8868\u8fbe\u5f0f\u53c8\u79f0\u89c4\u5219\u8868\u8fbe\u5f0f\uff0c\u5728\u4ee3\u7801\u4e2d\u5e38\u7b80\u5199\u4e3aregex\u3001regexp\u6216RE\uff0c\u6b63\u5219\u8868\u8fbe\u5f0f\u901a\u5e38\u88ab\u7528\u6765\u68c0\u7d22\u3001\u66ff\u6362\u90a3\u4e9b\u7b26\u5408\u67d0\u4e2a\u6a21\u5f0f\u7684\u6587\u672c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u4e3a\u4ec0\u4e48\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\"><span class=\"ez-toc-section\" id=\"%e4%b8%ba%e4%bb%80%e4%b9%88%e4%bd%bf%e7%94%a8%e6%ad%a3%e5%88%99%e8%a1%a8%e8%be%be%e5%bc%8f%ef%bc%9f\"><\/span>\u4e3a\u4ec0\u4e48\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5178\u578b\u7684\u641c\u7d22\u548c\u66ff\u6362\u64cd\u4f5c\u8981\u6c42\u60a8\u63d0\u4f9b\u4e0e\u9884\u671f\u7684\u641c\u7d22\u7ed3\u679c\u5339\u914d\u7684\u786e\u5207\u6587\u672c\u3002\u867d\u7136\u8fd9\u79cd\u6280\u672f\u5bf9\u4e8e\u5bf9\u9759\u6001\u6587\u672c\u6267\u884c\u7b80\u5355\u641c\u7d22\u548c\u66ff\u6362\u4efb\u52a1\u53ef\u80fd\u5df2\u7ecf\u8db3\u591f\u4e86\uff0c\u4f46\u5b83\u7f3a\u4e4f\u7075\u6d3b\u6027\uff0c\u82e5\u91c7\u7528\u8fd9\u79cd\u65b9\u6cd5\u641c\u7d22\u52a8\u6001\u6587\u672c\uff0c\u5373\u4f7f\u4e0d\u662f\u4e0d\u53ef\u80fd\uff0c\u81f3\u5c11\u4e5f\u4f1a\u53d8\u5f97\u5f88\u56f0\u96be\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u53ef\u4ee5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u6d4b\u8bd5\u5b57\u7b26\u4e32\u5185\u7684\u6a21\u5f0f\u3002<br>\u4f8b\u5982\uff0c\u53ef\u4ee5\u6d4b\u8bd5\u8f93\u5165\u5b57\u7b26\u4e32\uff0c\u4ee5\u67e5\u770b\u5b57\u7b26\u4e32\u5185\u662f\u5426\u51fa\u73b0\u7535\u8bdd\u53f7\u7801\u6a21\u5f0f\u6216\u4fe1\u7528\u5361\u53f7\u7801\u6a21\u5f0f\u3002\u8fd9\u79f0\u4e3a\u6570\u636e\u9a8c\u8bc1\u3002<\/li><li>\u66ff\u6362\u6587\u672c\u3002<br>\u53ef\u4ee5\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6765\u8bc6\u522b\u6587\u6863\u4e2d\u7684\u7279\u5b9a\u6587\u672c\uff0c\u5b8c\u5168\u5220\u9664\u8be5\u6587\u672c\u6216\u8005\u7528\u5176\u4ed6\u6587\u672c\u66ff\u6362\u5b83\u3002<\/li><li>\u57fa\u4e8e\u6a21\u5f0f\u5339\u914d\u4ece\u5b57\u7b26\u4e32\u4e2d\u63d0\u53d6\u5b50\u5b57\u7b26\u4e32\u3002<br>\u53ef\u4ee5\u67e5\u627e\u6587\u6863\u5185\u6216\u8f93\u5165\u57df\u5185\u7279\u5b9a\u7684\u6587\u672c\u3002<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u641c\u7d22\u6574\u4e2a\u7f51\u7ad9\uff0c\u5220\u9664\u8fc7\u65f6\u7684\u6750\u6599\uff0c\u4ee5\u53ca\u66ff\u6362\u67d0\u4e9b HTML \u683c\u5f0f\u6807\u8bb0\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6765\u786e\u5b9a\u5728\u6bcf\u4e2a\u6587\u4ef6\u4e2d\u662f\u5426\u51fa\u73b0\u8be5\u6750\u6599\u6216\u8be5 HTML \u683c\u5f0f\u6807\u8bb0\u3002\u6b64\u8fc7\u7a0b\u5c06\u53d7\u5f71\u54cd\u7684\u6587\u4ef6\u5217\u8868\u7f29\u5c0f\u5230\u5305\u542b\u9700\u8981\u5220\u9664\u6216\u66f4\u6539\u7684\u6750\u6599\u7684\u90a3\u4e9b\u6587\u4ef6\u3002\u7136\u540e\u53ef\u4ee5\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6765\u5220\u9664\u8fc7\u65f6\u7684\u6750\u6599\u3002\u6700\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6765\u641c\u7d22\u548c\u66ff\u6362\u6807\u8bb0\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u683c\u5f0f\"><span class=\"ez-toc-section\" id=\"%e6%ad%a3%e5%88%99%e8%a1%a8%e8%be%be%e5%bc%8f%e7%9a%84%e6%a0%bc%e5%bc%8f%ef%bc%9f\"><\/span>\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u683c\u5f0f\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">\"\/\u8868\u8fbe\u5f0f\/[\u4fee\u9970\u7b26]\"<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5-\u5b57\u7b26-\u4e00\"><span class=\"ez-toc-section\" id=\"%e6%ad%a3%e5%88%99%e8%a1%a8%e8%be%be%e5%bc%8f%e7%9a%84%e8%af%ad%e6%b3%95-%e5%ad%97%e7%ac%a6%ef%bc%88%e4%b8%80%ef%bc%89\"><\/span>\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\u2014\u2014\u5b57\u7b26\uff08\u4e00\uff09<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6570\u5b57\uff1a\\d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u975e\u6570\u5b57\uff1a\\D<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7a7a\u767d\u5b57\u7b26\uff08\u7a7a\u683c\u3001\u5236\u8868\u7b26\u3001\u6362\u9875\u7b26\u7b49\uff09\uff1a\\s<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \u9650\u5b9a\u7b26\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> {n} => \u4f8b\u5982: 0{8} \u610f\u601d\u662f\u6307 \u53ea\u6709\u8fde\u8d77\u67658\u4e2a0\u624d\u4f1a\u88ab\u5339\u914d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> {n,} =>\u4f8b\u5982\uff1a 0{2,} \u610f\u601d\u662f \u53ea\u8981\u67092\u4e2a0\u53ca\u5176\u4ee5\u4e0a\u7684\u5c31\u4f1a\u88ab\u5339\u914d  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">{n,m} => \u4f8b\u5982\uff1a 0{2,4} \u610f\u601d\u662f\u6700\u5c11\u5339\u914d2\u4e2a0\uff0c\u6700\u591a\u5339\u914d4\u4e2a0 \u6ce8\uff1a\u88ab\u5339\u914d\u65f6\uff0c\u9ed8\u8ba4\u5339\u914d\u6700\u591a\u7684\u6b21\u6570 <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \u4fee\u9970\u7b26\uff1a <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \/i => \u4e0d\u533a\u5206\u5927\u5c0f\u5199 <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \/A => \u5339\u914d\u89c4\u5219\u5fc5\u987b\u4ece\u5934\u5f00\u59cb\u5339\u914d <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \/s => .\u5c06\u5339\u914d\u4e00\u5207\u5b57\u7b26  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\/x => \u6b63\u5219\u8868\u8fbe\u5f0f\u4e2d\u7684\u7a7a\u767d\u5b57\u7b26\u4f1a\u88ab\u5ffd\u7565<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u975e\u7a7a\u767d\u5b57\u7b26\uff1a\\S<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5355\u8bcd\u5b57\u7b26\uff0826\u4e2a\u82f1\u6587\u5b57\u6bcd+\u6570\u5b57+\u4e0b\u5212\u7ebf\uff09\uff1a\\w<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u975e\u5355\u8bcd\u5b57\u7b26\uff1a\\W<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5-\u5b57\u7b26-\u4e8c\"><span class=\"ez-toc-section\" id=\"%e6%ad%a3%e5%88%99%e8%a1%a8%e8%be%be%e5%bc%8f%e7%9a%84%e8%af%ad%e6%b3%95-%e5%ad%97%e7%ac%a6%ef%bc%88%e4%ba%8c%ef%bc%89\"><\/span>\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\u2014\u2014\u5b57\u7b26\uff08\u4e8c\uff09<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b57\u7b26\u96c6\u5408\uff1a[\u5355\u4e2a\u5b57\u7b26\u6216\u5b57\u7b26\u533a\u95f4]\uff0c\u7528\u4e8e\u5339\u914d\u96c6\u5408\u5185\u5b57\u7b26<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u5982\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">[a-z]\u8868\u793aa-z\u8fd926\u4e2a\u5c0f\u5199\u5b57\u6bcd<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">[0-9a-z]\u8868\u793a0-9\u8fd910\u4e2a\u6570\u5b57\u548ca-z\u8fd926\u4e2a\u5c0f\u5199\u5b57\u6bcd<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">[123a-h]\u8868\u793a\u5305\u542b\u6570\u5b571\uff0c2\uff0c3\u548ca-h\u8fd98\u4e2a\u5b57\u6bcd<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ce8\u610f\uff1a\u4e24\u4e2a\u4e0d\u540c\u7684\u5b57\u7b26\u6bb5\u95f4\u4e00\u5b9a\u4e0d\u8981\u7528\u9017\u53f7\u9694\u5f00<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u975e\u96c6\u5408\u5b57\u7b26\uff1a[^\u5355\u4e2a\u5b57\u7b26\u6216\u5b57\u7b26\u533a\u95f4]\uff0c\u7528\u4e8e\u5339\u914d\u975e\u96c6\u5408\u5185\u5b57\u7b26<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u5982\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">[^0-9]\u8868\u793a\u5339\u914d\u6240\u6709\u975e\u6570\u5b57\u5b57\u7b26<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">[^a-zA-Z]\u8868\u793a\u5339\u914d\u6240\u6709\u975e\u5b57\u6bcd\u5b57\u7b26<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">8\u5b57\u7b26\u96c6\u5408\u7684\u6570\u5b57\u533a\u95f4\u8be5\u6ce8\u610f\u4ec0\u4e48\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6570\u5b57\u533a\u95f4\u6b63\u5219\u53ea\u80fd\u5339\u914d0-9\u7684\u6570\u5b57\uff0c\u56e0\u4e3a\u6b63\u5219\u53ea\u80fd\u4e00\u4f4d\u4e00\u4f4d\u7684\u5339\u914d\uff0c\u6240\u4ee5\u8d85\u8fc79\u4ee5\u5916\u7684\u6570\u5b57\u53ea\u662f\u6211\u4eec\u7ed9\u7684\u6982\u5ff5\uff0c\u5bf9\u4e8e\u6b63\u5219\u673a\u5236\u6765\u8bf4\u5b83\u662f\u8ba4\u4e0d\u5230\u7684\uff0c\u6bd4\u5982[100-120]\u5c31\u65e0\u6cd5\u88ab\u5339\u914d<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5-\u5173\u952e\u5b57\"><span class=\"ez-toc-section\" id=\"%e6%ad%a3%e5%88%99%e8%a1%a8%e8%be%be%e5%bc%8f%e7%9a%84%e8%af%ad%e6%b3%95-%e5%85%b3%e9%94%ae%e5%ad%97\"><\/span>\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\u2014\u2014\u5173\u952e\u5b57<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">() \u8868\u793a\u4e00\u4e2a\u6574\u4f53<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">^ \u5339\u914d\u8f93\u5165\u5b57\u7b26\u4e32\u7684\u5f00\u59cb\u4f4d\u7f6e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">$ \u5339\u914d\u8f93\u5165\u5b57\u7b26\u4e32\u7684\u7ed3\u5c3e\u4f4d\u7f6e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">. \u901a\u914d\u7b26\uff0c\u4ee3\u8868\u4efb\u610f\u5b57\u7b26\u4f46\u4e0d\u5339\u914d\u6362\u884c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">* \u5339\u914d0\u6b21\u6216\u8005\u591a\u6b21<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">+ \u5339\u914d1\u6b21\u6216\u8005\u591a\u6b21<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\\ \u8f6c\u4e49\u5b57\u7b26<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">| \u4e24\u9879\u4e4b\u95f4\u7684\u4e00\u4e2a\u9009\u62e9<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u5339\u914d\u6a21\u5f0f\u7684\u4f18\u5148\u7ea7-\u4f18\u5148\u7ea7\u4ece\u9ad8\u5230\u4f4e\u6392\"><span class=\"ez-toc-section\" id=\"%e5%8c%b9%e9%85%8d%e6%a8%a1%e5%bc%8f%e7%9a%84%e4%bc%98%e5%85%88%e7%ba%a7%ef%bc%88%e4%bc%98%e5%85%88%e7%ba%a7%e4%bb%8e%e9%ab%98%e5%88%b0%e4%bd%8e%e6%8e%92%ef%bc%89\"><\/span><strong>\u5339\u914d\u6a21\u5f0f\u7684\u4f18\u5148\u7ea7\uff08\u4f18\u5148\u7ea7\u4ece\u9ad8\u5230\u4f4e\u6392\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\\\u8f6c\u4e49\u5b57\u7b26\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">()[]\u5927\u539f\u5b50\u548c\u539f\u5b50\u8868\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">*+?{n}{n,}{n,m}\u91cd\u590d\u5339\u914d\uff08\u5339\u914d\u6b21\u6570\uff09\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">^$\\b\\B\u8fb9\u754c\u9650\u5236\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">|\u6a21\u5f0f\u9009\u62e9<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b66\u4e60\u6b63\u5219\u8868\u8fbe\u5f0f\u53ef\u4ee5\u53c2\u8003\u83dc\u9e1f\u6559\u7a0b\u548cW3c\u3002 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