{"id":164,"date":"2013-06-08T10:19:52","date_gmt":"2013-06-08T02:19:52","guid":{"rendered":"http:\/\/www.zyuns.com\/?p=164"},"modified":"2015-10-22T15:28:30","modified_gmt":"2015-10-22T07:28:30","slug":"zheng-ze-zhi-tan-lan-yu-fei-tan-lan-mo-shi","status":"publish","type":"post","link":"https:\/\/www.siediyer.cn\/?p=164","title":{"rendered":"\u6b63\u5219\u4e4b\u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f"},"content":{"rendered":"

1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u6982\u8ff0<\/h1>\n

\u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f\u5f71\u54cd\u7684\u662f\u88ab\u91cf\u8bcd\u4fee\u9970\u7684\u5b50\u8868\u8fbe\u5f0f\u7684\u5339\u914d\u884c\u4e3a\uff0c\u8d2a\u5a6a\u6a21\u5f0f\u5728\u6574\u4e2a\u8868\u8fbe\u5f0f\u5339\u914d\u6210\u529f\u7684\u524d\u63d0\u4e0b\uff0c\u5c3d\u53ef\u80fd\u591a\u7684\u5339\u914d\uff0c\u800c\u975e\u8d2a\u5a6a\u6a21\u5f0f\u5728\u6574\u4e2a\u8868\u8fbe\u5f0f\u5339\u914d\u6210\u529f\u7684\u524d\u63d0\u4e0b\uff0c\u5c3d\u53ef\u80fd\u5c11\u7684\u5339\u914d\u3002\u975e\u8d2a\u5a6a\u6a21\u5f0f\u53ea\u88ab\u90e8\u5206NFA\u5f15\u64ce\u6240\u652f\u6301\u3002<\/p>\n

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\u201c{m,n}<\/strong>\u201d\u3001\u201c{m,}<\/strong>\u201d\u3001\u201c?<\/strong>\u201d\u3001\u201c*<\/strong>\u201d\u548c\u201c+<\/strong>\u201d\u3002<\/p>\n

\u5728\u4e00\u4e9b\u4f7f\u7528NFA\u5f15\u64ce\u7684\u8bed\u8a00\u4e2d\uff0c\u5728\u5339\u914d\u4f18\u5148\u91cf\u8bcd\u540e\u52a0\u4e0a\u201c?<\/strong>\u201d\uff0c\u5373\u53d8\u6210\u5c5e\u4e8e\u975e\u8d2a\u5a6a\u6a21\u5f0f\u7684\u91cf\u8bcd\uff0c\u4e5f\u53eb\u505a\u5ffd\u7565\u4f18\u5148\u91cf\u8bcd\uff0c\u5305\u62ec\uff1a<\/p>\n

\u201c{m,n}?<\/strong>\u201d\u3001\u201c{m,}?<\/strong>\u201d\u3001\u201c??<\/strong>\u201d\u3001\u201c*?<\/strong>\u201d\u548c\u201c+?<\/strong>\u201d\u3002<\/p>\n

\u4ece\u6b63\u5219\u8bed\u6cd5\u7684\u89d2\u5ea6\u6765\u8bb2\uff0c\u88ab\u5339\u914d\u4f18\u5148\u91cf\u8bcd\u4fee\u9970\u7684\u5b50\u8868\u8fbe\u5f0f\u4f7f\u7528\u7684\u5c31\u662f\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u5982\u201c(Expression)+<\/strong>\u201d\uff1b\u88ab\u5ffd\u7565\u4f18\u5148\u91cf\u8bcd\u4fee\u9970\u7684\u5b50\u8868\u8fbe\u5f0f\u4f7f\u7528\u7684\u5c31\u662f\u975e\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u5982\u201c(Expression)+?<\/strong>\u201d\u3002<\/p>\n

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<\/a>2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f\u5339\u914d\u539f\u7406<\/h1>\n

\u5bf9\u4e8e\u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u53ef\u4ee5\u4ece\u5e94\u7528\u548c\u539f\u7406\u4e24\u4e2a\u89d2\u5ea6\u8fdb\u884c\u7406\u89e3\uff0c\u4f46\u5982\u679c\u60f3\u771f\u6b63\u638c\u63e1\uff0c\u8fd8\u662f\u8981\u4ece\u5339\u914d\u539f\u7406\u6765\u7406\u89e3\u7684\u3002<\/p>\n

\u5148\u4ece\u5e94\u7528\u7684\u89d2\u5ea6\uff0c\u56de\u7b54\u4e00\u4e0b\u201c\u4ec0\u4e48\u662f\u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f\uff1f\u201d<\/p>\n

<\/a>2.1\u00a0\u00a0\u00a0\u00a0 \u4ece\u5e94\u7528\u89d2\u5ea6\u5206\u6790\u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f<\/h2>\n

<\/a>2.1.1\u00a0 \u4ec0\u4e48\u662f\u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f<\/h3>\n

\u5148\u770b\u4e00\u4e2a\u4f8b\u5b50<\/p>\n

\u4e3e\u4f8b<\/strong>\uff1a<\/p>\n

\u6e90\u5b57\u7b26\u4e32\uff1aaa<div>test1<\/div>bb<div>test2<\/div>cc<\/strong><\/p>\n

\u6b63\u5219\u8868\u8fbe\u5f0f\u4e00\uff1a<div>.*<\/div><\/strong><\/p>\n

\u5339\u914d\u7ed3\u679c\u4e00\uff1a<div>test1<\/div>bb<div>test2<\/div><\/strong><\/p>\n

\u6b63\u5219\u8868\u8fbe\u5f0f\u4e8c\uff1a<div>.*?<\/div><\/strong><\/p>\n

\u5339\u914d\u7ed3\u679c\u4e8c\uff1a<div>test1<\/div><\/strong>\uff08\u8fd9\u91cc\u6307\u7684\u662f\u4e00\u6b21\u5339\u914d\u7ed3\u679c\uff0c\u6240\u4ee5\u6ca1\u5305\u62ec<div>test2<\/div><\/strong>\uff09<\/p>\n

\u6839\u636e\u4e0a\u9762\u7684\u4f8b\u5b50\uff0c\u4ece\u5339\u914d\u884c\u4e3a\u4e0a\u5206\u6790\u4e00\u4e0b\uff0c\u4ec0\u662f\u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f\u3002<\/p>\n

\u6b63\u5219\u8868\u8fbe\u5f0f\u4e00\u91c7\u7528\u7684\u662f\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u5728\u5339\u914d\u5230\u7b2c\u4e00\u4e2a\u201c<\/div><\/strong>\u201d\u65f6\u5df2\u7ecf\u53ef\u4ee5\u4f7f\u6574\u4e2a\u8868\u8fbe\u5f0f\u5339\u914d\u6210\u529f\uff0c\u4f46\u662f\u7531\u4e8e\u91c7\u7528\u7684\u662f\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u6240\u4ee5\u4ecd\u7136\u8981\u5411\u53f3\u5c1d\u8bd5\u5339\u914d\uff0c\u67e5\u770b\u662f\u5426\u8fd8\u6709\u66f4\u957f\u7684\u53ef\u4ee5\u6210\u529f\u5339\u914d\u7684\u5b50\u4e32\uff0c\u5339\u914d\u5230\u7b2c\u4e8c\u4e2a\u201c<\/div><\/strong>\u201d\u540e\uff0c\u5411\u53f3\u518d\u6ca1\u6709\u53ef\u4ee5\u6210\u529f\u5339\u914d\u7684\u5b50\u4e32\uff0c\u5339\u914d\u7ed3\u675f\uff0c\u5339\u914d\u7ed3\u679c\u4e3a\u201c<div>test1<\/div>bb<div>test2<\/div><\/strong>\u201d\u3002\u5f53\u7136\uff0c\u5b9e\u9645\u7684\u5339\u914d\u8fc7\u7a0b\u5e76\u4e0d\u662f\u8fd9\u6837\u7684\uff0c\u540e\u9762\u7684\u5339\u914d\u539f\u7406\u4f1a\u8be6\u7ec6\u4ecb\u7ecd\u3002<\/p>\n

\u4ec5\u4ece\u5e94\u7528\u89d2\u5ea6\u5206\u6790\uff0c\u53ef\u4ee5\u8fd9\u6837\u8ba4\u4e3a\uff0c\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u5c31\u662f\u5728\u6574\u4e2a\u8868\u8fbe\u5f0f\u5339\u914d\u6210\u529f\u7684\u524d\u63d0\u4e0b\uff0c\u5c3d\u53ef\u80fd\u591a\u7684\u5339\u914d\uff0c\u4e5f\u5c31\u662f\u6240\u8c13\u7684\u201c\u8d2a\u5a6a\u201d\uff0c\u901a\u4fd7\u70b9\u8bb2\uff0c\u5c31\u662f\u770b\u5230\u60f3\u8981\u7684\uff0c\u6709\u591a\u5c11\u5c31\u6361\u591a\u5c11\uff0c\u9664\u975e\u518d\u4e5f\u6ca1\u6709\u60f3\u8981\u7684\u4e86\u3002<\/p>\n

\u6b63\u5219\u8868\u8fbe\u5f0f\u4e8c\u91c7\u7528\u7684\u662f\u975e\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u5728\u5339\u914d\u5230\u7b2c\u4e00\u4e2a\u201c<\/div><\/strong>\u201d\u65f6\u4f7f\u6574\u4e2a\u8868\u8fbe\u5f0f\u5339\u914d\u6210\u529f\uff0c\u7531\u4e8e\u91c7\u7528\u7684\u662f\u975e\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u6240\u4ee5\u7ed3\u675f\u5339\u914d\uff0c\u4e0d\u518d\u5411\u53f3\u5c1d\u8bd5\uff0c\u5339\u914d\u7ed3\u679c\u4e3a\u201c<div>test1<\/div><\/strong>\u201d\u3002<\/p>\n

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<\/a>2.1.2\u00a0 \u5173\u4e8e\u524d\u63d0\u6761\u4ef6\u7684\u8bf4\u660e<\/h3>\n

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\u6b63\u5219\u8868\u8fbe\u5f0f\u4e09\uff1a<div>.*<\/div>bb<\/strong><\/p>\n

\u5339\u914d\u7ed3\u679c\u4e09\uff1a<div>test1<\/div>bb<\/strong><\/p>\n

\u4fee\u9970\u201c.<\/strong>\u201d\u7684\u4ecd\u7136\u662f\u5339\u914d\u4f18\u5148\u91cf\u8bcd\u201c*<\/strong>\u201d\uff0c\u6240\u4ee5\u8fd9\u91cc\u8fd8\u662f\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u524d\u9762\u7684\u201c<div>.*<\/div><\/strong>\u201d\u4ecd\u7136\u53ef\u4ee5\u5339\u914d\u5230\u201c<div>test1<\/div>bb<div>test2<\/div><\/strong>\u201d\uff0c\u4f46\u662f\u7531\u4e8e\u540e\u9762\u7684\u201cbb<\/strong>\u201d\u65e0\u6cd5\u5339\u914d\u6210\u529f\uff0c\u8fd9\u65f6\u201c<div>.*<\/div><\/strong>\u201d\u5fc5\u987b\u8ba9\u51fa\u5df2\u5339\u914d\u7684\u201cbb<div>test2<\/div><\/strong>\u201d\uff0c\u4ee5\u4f7f\u6574\u4e2a\u8868\u8fbe\u5f0f\u5339\u914d\u6210\u529f\u3002\u8fd9\u65f6\u6574\u4e2a\u8868\u8fbe\u5f0f\u5339\u914d\u7684\u7ed3\u679c\u4e3a\u201c<div>test1<\/div>bb<\/strong>\u201d\uff0c\u201c<div>.*<\/div><\/strong>\u201d\u5339\u914d\u7684\u5185\u5bb9\u4e3a\u201c<div>test1<\/div><\/strong>\u201d\u3002\u53ef\u4ee5\u770b\u5230\uff0c\u5728\u201c\u6574\u4e2a\u8868\u8fbe\u5f0f\u5339\u914d\u6210\u529f\u201d\u7684\u524d\u63d0\u4e0b\uff0c\u8d2a\u5a6a\u6a21\u5f0f\u624d\u771f\u6b63\u7684\u5f71\u54cd\u7740\u5b50\u8868\u8fbe\u5f0f\u7684\u5339\u914d\u884c\u4e3a\uff0c\u5982\u679c\u6574\u4e2a\u8868\u8fbe\u5f0f\u5339\u914d\u5931\u8d25\uff0c\u8d2a\u5a6a\u6a21\u5f0f\u53ea\u4f1a\u5f71\u54cd\u5339\u914d\u8fc7\u7a0b\uff0c\u5bf9\u5339\u914d\u7ed3\u679c\u7684\u5f71\u54cd\u65e0\u4ece\u8c08\u8d77\u3002<\/p>\n

\u975e\u8d2a\u5a6a\u6a21\u5f0f\u4e5f\u5b58\u5728\u540c\u6837\u7684\u95ee\u9898\uff0c\u6765\u770b\u4e0b\u9762\u7684\u4f8b\u5b50\u3002<\/p>\n

\u6b63\u5219\u8868\u8fbe\u5f0f\u56db\uff1a<div>.*?<\/div>cc<\/strong><\/p>\n

\u5339\u914d\u7ed3\u679c\u56db\uff1a<div>test1<\/div>bb<div>test2<\/div>cc<\/strong><\/p>\n

\u8fd9\u91cc\u91c7\u7528\u7684\u662f\u975e\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u524d\u9762\u7684\u201c<div>.*?<\/div><\/strong>\u201d\u4ecd\u7136\u662f\u5339\u914d\u5230\u201c<div>test1<\/div><\/strong>\u201d\u4e3a\u6b62\uff0c\u6b64\u65f6\u540e\u9762\u7684\u201ccc<\/strong>\u201d\u65e0\u6cd5\u5339\u914d\u6210\u529f\uff0c\u8981\u6c42\u201c<div>.*?<\/div><\/strong>\u201d\u5fc5\u987b\u7ee7\u7eed\u5411\u53f3\u5c1d\u8bd5\u5339\u914d\uff0c\u76f4\u5230\u5339\u914d\u5185\u5bb9\u4e3a\u201c<div>test1<\/div>bb<div>test2<\/div><\/strong>\u201d\u65f6\uff0c\u540e\u9762\u7684\u201ccc<\/strong>\u201d\u624d\u80fd\u5339\u914d\u6210\u529f\uff0c\u6574\u4e2a\u8868\u8fbe\u5f0f\u5339\u914d\u6210\u529f\uff0c\u5339\u914d\u7684\u5185\u5bb9\u4e3a\u201c<div>test1<\/div>bb<div>test2<\/div>cc<\/strong>\u201d\uff0c\u5176\u4e2d\u201c<div>.*?<\/div><\/strong>\u201d\u5339\u914d\u7684\u5185\u5bb9\u4e3a\u201c<div>test1<\/div>bb<div>test2<\/div><\/strong>\u201d\u3002\u53ef\u4ee5\u770b\u5230\uff0c\u5728\u201c\u6574\u4e2a\u8868\u8fbe\u5f0f\u5339\u914d\u6210\u529f\u201d\u7684\u524d\u63d0\u4e0b\uff0c\u975e\u8d2a\u5a6a\u6a21\u5f0f\u624d\u771f\u6b63\u7684\u5f71\u54cd\u7740\u5b50\u8868\u8fbe\u5f0f\u7684\u5339\u914d\u884c\u4e3a\uff0c\u5982\u679c\u6574\u4e2a\u8868\u8fbe\u5f0f\u5339\u914d\u5931\u8d25\uff0c\u975e\u8d2a\u5a6a\u6a21\u5f0f\u65e0\u6cd5\u5f71\u54cd\u5b50\u8868\u8fbe\u5f0f\u7684\u5339\u914d\u884c\u4e3a\u3002<\/p>\n

<\/a>2.1.3\u00a0 \u8d2a\u5a6a\u8fd8\u662f\u975e\u8d2a\u5a6a\u2014\u2014\u5e94\u7528\u7684\u6289\u62e9<\/h3>\n

\u901a\u8fc7\u5e94\u7528\u89d2\u5ea6\u7684\u5206\u6790\uff0c\u5df2\u57fa\u672c\u4e86\u89e3\u4e86\u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f\u7684\u7279\u6027\uff0c\u90a3\u4e48\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u7a76\u7adf\u662f\u9009\u62e9\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u8fd8\u662f\u975e\u8d2a\u5a6a\u6a21\u5f0f\u5462\uff0c\u8fd9\u8981\u6839\u636e\u9700\u6c42\u6765\u786e\u5b9a\u3002<\/p>\n

\u5bf9\u4e8e\u4e00\u4e9b\u7b80\u5355\u7684\u9700\u6c42\uff0c\u6bd4\u5982\u6e90\u5b57\u7b26\u4e3a\u201caa<div>test1<\/div>bb<\/strong>\u201d\uff0c\u90a3\u4e48\u53d6\u5f97div\u6807\u7b7e\uff0c\u4f7f\u7528\u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f\u90fd\u53ef\u4ee5\u53d6\u5f97\u60f3\u8981\u7684\u7ed3\u679c\uff0c\u4f7f\u7528\u54ea\u4e00\u79cd\u6216\u8bb8\u5173\u7cfb\u4e0d\u5927\u3002<\/p>\n

\u4f46\u662f\u5c312.1.1\u4e2d\u7684\u4f8b\u5b50\u6765\u8bf4\uff0c\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u4e00\u822c\u4e00\u6b21\u53ea\u9700\u8981\u53d6\u5f97\u4e00\u4e2a\u914d\u5bf9\u51fa\u73b0\u7684div\u6807\u7b7e\uff0c\u4e5f\u5c31\u662f\u975e\u8d2a\u5a6a\u6a21\u5f0f\u5339\u914d\u5230\u7684\u5185\u5bb9\uff0c\u8d2a\u5a6a\u6a21\u5f0f\u6240\u5339\u914d\u5230\u7684\u5185\u5bb9\u901a\u5e38\u5e76\u4e0d\u662f\u6211\u4eec\u6240\u9700\u8981\u7684\u3002<\/p>\n

\u90a3\u4e3a\u4ec0\u4e48\u8fd8\u8981\u6709\u8d2a\u5a6a\u6a21\u5f0f\u7684\u5b58\u5728\u5462\uff0c\u4ece\u5e94\u7528\u89d2\u5ea6\u5f88\u96be\u7ed9\u51fa\u6ee1\u610f\u7684\u89e3\u7b54\u4e86\uff0c\u8fd9\u5c31\u9700\u8981\u4ece\u5339\u914d\u539f\u7406\u7684\u89d2\u5ea6\u53bb\u5206\u6790\u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f\u3002<\/p>\n

<\/a>2.2\u00a0\u00a0\u00a0\u00a0 \u4ece\u5339\u914d\u539f\u7406\u89d2\u5ea6\u5206\u6790\u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f<\/h2>\n

\u5982\u679c\u60f3\u771f\u6b63\u4e86\u89e3\u4ec0\u4e48\u662f\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u4ec0\u4e48\u662f\u975e\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u5206\u522b\u5728\u4ec0\u4e48\u60c5\u51b5\u4e0b\u4f7f\u7528\uff0c\u5404\u81ea\u7684\u6548\u7387\u5982\u4f55\uff0c\u90a3\u5c31\u4e0d\u80fd\u4ec5\u4ec5\u4ece\u5e94\u7528\u89d2\u5ea6\u5206\u6790\uff0c\u800c\u8981\u5145\u5206\u4e86\u89e3\u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f\u7684\u5339\u914d\u539f\u7406\u3002<\/p>\n

<\/a>2.2.1\u00a0 \u4ece\u57fa\u672c\u5339\u914d\u539f\u7406\u8c08\u8d77<\/h3>\n

NFA\u5f15\u64ce\u57fa\u672c\u5339\u914d\u539f\u7406\u53c2\u8003\uff1a\u6b63\u5219\u57fa\u7840\u4e4b\u2014\u2014NFA\u5f15\u64ce\u5339\u914d\u539f\u7406<\/a>\u3002<\/p>\n

\u8fd9\u91cc\u4e3b\u8981\u9488\u5bf9\u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f\u6d89\u53ca\u5230\u7684\u5339\u914d\u539f\u7406\u8fdb\u884c\u4ecb\u7ecd\u3002\u5148\u770b\u4e00\u4e0b\u8d2a\u5a6a\u6a21\u5f0f\u7b80\u5355\u7684\u5339\u914d\u8fc7\u7a0b\u3002<\/p>\n

\u6e90\u5b57\u7b26\u4e32\uff1a“Regex”<\/strong><\/p>\n

\u6b63\u5219\u8868\u8fbe\u5f0f\uff1a“.*”<\/strong><\/p>\n

\"2-1\"<\/p>\n

\n

\u56fe2-1<\/p>\n

\u6ce8\uff1a\u4e3a\u4e86\u80fd\u591f\u770b\u6e05\u6670\u5339\u914d\u8fc7\u7a0b\uff0c\u4e0a\u9762\u7684\u7a7a\u9699\u7559\u5f97\u8f83\u5927\uff0c\u5b9e\u9645\u6e90\u5b57\u7b26\u4e32\u4e3a\u201c\u201dRegex\u201d<\/strong>\u201d\uff0c\u4e0b\u540c\u3002<\/p>\n

\u6765\u770b\u4e00\u4e0b\u5339\u914d\u8fc7\u7a0b\u3002\u9996\u5148\u7531\u7b2c\u4e00\u4e2a\u201c“<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\uff0c\u5339\u914d\u4f4d\u7f6e0\u4f4d\u7684\u201c“<\/strong>\u201d\uff0c\u5339\u914d\u6210\u529f\uff0c\u63a7\u5236\u6743\u4ea4\u7ed9\u201c.*<\/strong>\u201d\u3002<\/p>\n

\u201c.*<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\u540e\uff0c\u7531\u4e8e\u201c*<\/strong>\u201d\u662f\u5339\u914d\u4f18\u5148\u91cf\u8bcd\uff0c\u5728\u53ef\u5339\u914d\u53ef\u4e0d\u5339\u914d\u7684\u60c5\u51b5\u4e0b\uff0c\u4f18\u5148\u5c1d\u8bd5\u5339\u914d\u3002\u4ece\u4f4d\u7f6e1\u5904\u7684\u201cR<\/strong>\u201d\u5f00\u59cb\u5c1d\u8bd5\u5339\u914d\uff0c\u5339\u914d\u6210\u529f\uff0c\u7ee7\u7eed\u5411\u53f3\u5339\u914d\uff0c\u5339\u914d\u4f4d\u7f6e2\u5904\u7684\u201ce<\/strong>\u201d\uff0c\u5339\u914d\u6210\u529f\uff0c\u7ee7\u7eed\u5411\u53f3\u5339\u914d\uff0c\u76f4\u5230\u5339\u914d\u5230\u7ed3\u5c3e\u7684\u201c\u201d<\/strong>\u201d\uff0c\u5339\u914d\u6210\u529f\uff0c\u7531\u4e8e\u6b64\u65f6\u5df2\u5339\u914d\u5230\u5b57\u7b26\u4e32\u7684\u7ed3\u5c3e\uff0c\u6240\u4ee5\u201c.*<\/strong>\u201d\u7ed3\u675f\u5339\u914d\uff0c\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u6b63\u5219\u8868\u8fbe\u5f0f\u6700\u540e\u7684\u201c“<\/strong>\u201d\u3002<\/p>\n

\u201c“<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\u540e\uff0c\u7531\u4e8e\u5df2\u7ecf\u5728\u5b57\u7b26\u4e32\u7ed3\u675f\u4f4d\u7f6e\uff0c\u5339\u914d\u5931\u8d25\uff0c\u5411\u524d\u67e5\u627e\u53ef\u4f9b\u56de\u6eaf\u7684\u72b6\u6001\uff0c\u63a7\u5236\u6743\u4ea4\u7ed9\u201c.*<\/strong>\u201d\uff0c\u7531\u201c.*<\/strong>\u201d\u8ba9\u51fa\u4e00\u4e2a\u5b57\u7b26\uff0c\u4e5f\u5c31\u662f\u5b57\u7b26\u4e32\u7ed3\u5c3e\u5904\u7684\u201c\u201d<\/strong>\u201d\uff0c\u518d\u628a\u63a7\u5236\u6743\u4ea4\u7ed9\u6b63\u5219\u8868\u8fbe\u5f0f\u6700\u540e\u7684\u201c“<\/strong>\u201d\uff0c\u7531\u201c“<\/strong>\u201d\u5339\u914d\u5b57\u7b26\u4e32\u7ed3\u5c3e\u5904\u7684\u201c“<\/strong>\u201d\uff0c\u5339\u914d\u6210\u529f\u3002<\/p>\n

\u6b64\u65f6\u6574\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\u6210\u529f\uff0c\u5176\u4e2d\u201c.*<\/strong>\u201d\u5339\u914d\u7684\u5185\u5bb9\u4e3a\u201cRegex<\/strong>\u201d\uff0c\u5339\u914d\u8fc7\u7a0b\u4e2d\u8fdb\u884c\u4e86\u4e00\u6b21\u56de\u6eaf\u3002<\/p>\n

\u63a5\u4e0b\u6765\u770b\u4e00\u4e0b\u975e\u8d2a\u5a6a\u6a21\u5f0f\u7b80\u5355\u7684\u5339\u914d\u8fc7\u7a0b\u3002<\/p>\n

\u6e90\u5b57\u7b26\u4e32\uff1a“Regex”<\/strong><\/p>\n

\u6b63\u5219\u8868\u8fbe\u5f0f\uff1a“.*?”<\/strong><\/p>\n

\"\"<\/p>\n

\n

\u56fe2-2<\/p>\n

\u770b\u4e00\u4e0b\u975e\u8d2a\u5a6a\u6a21\u5f0f\u7684\u5339\u914d\u8fc7\u7a0b\u3002\u9996\u5148\u7531\u7b2c\u4e00\u4e2a\u201c“<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\uff0c\u5339\u914d\u4f4d\u7f6e0\u4f4d\u7684\u201c“<\/strong>\u201d\uff0c\u5339\u914d\u6210\u529f\uff0c\u63a7\u5236\u6743\u4ea4\u7ed9\u201c.*?<\/strong>\u201d\u3002<\/p>\n

\u201c.*?<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\u540e\uff0c\u7531\u4e8e\u201c*?<\/strong>\u201d\u662f\u5ffd\u7565\u4f18\u5148\u91cf\u8bcd\uff0c\u5728\u53ef\u5339\u914d\u53ef\u4e0d\u5339\u914d\u7684\u60c5\u51b5\u4e0b\uff0c\u4f18\u5148\u5c1d\u8bd5\u4e0d\u5339\u914d\uff0c\u7531\u4e8e\u201c*<\/strong>\u201d\u7b49\u4ef7\u4e8e\u201c{0,}<\/strong>\u201d\uff0c\u6240\u4ee5\u5728\u5ffd\u7565\u4f18\u5148\u7684\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u4e0d\u5339\u914d\u4efb\u4f55\u5185\u5bb9\u3002\u4ece\u4f4d\u7f6e1\u5904\u5c1d\u8bd5\u5ffd\u7565\u5339\u914d\uff0c\u4e5f\u5c31\u662f\u4e0d\u5339\u914d\u4efb\u4f55\u5185\u5bb9\uff0c\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u6b63\u5219\u8868\u8fbe\u5f0f\u6700\u540e\u7684\u201c\u201d<\/strong>\u201d\u3002<\/p>\n

\u201c“<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\u540e\uff0c\u4ece\u4f4d\u7f6e1\u5904\u5c1d\u8bd5\u5339\u914d\uff0c\u7531\u201c“<\/strong>\u201d\u5339\u914d\u4f4d\u7f6e1\u5904\u7684\u201cR<\/strong>\u201d\uff0c\u5339\u914d\u5931\u8d25\uff0c\u5411\u524d\u67e5\u627e\u53ef\u4f9b\u56de\u6eaf\u7684\u72b6\u6001\uff0c\u63a7\u5236\u6743\u4ea4\u7ed9\u201c.*?<\/strong>\u201d\uff0c\u7531\u201c.*?<\/strong>\u201d\u5403\u8fdb\u4e00\u4e2a\u5b57\u7b26\uff0c\u5339\u914d\u4f4d\u7f6e1\u5904\u7684\u201cR<\/strong>\u201d\uff0c\u518d\u628a\u63a7\u5236\u6743\u4ea4\u7ed9\u6b63\u5219\u8868\u8fbe\u5f0f\u6700\u540e\u7684\u201c“<\/strong>\u201d\u3002<\/p>\n

\u201c“<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\u540e\uff0c\u4ece\u4f4d\u7f6e2\u5904\u5c1d\u8bd5\u5339\u914d\uff0c\u7531\u201c“<\/strong>\u201d\u5339\u914d\u4f4d\u7f6e1\u5904\u7684\u201ce<\/strong>\u201d\uff0c\u5339\u914d\u5931\u8d25\uff0c\u5411\u524d\u67e5\u627e\u53ef\u4f9b\u56de\u6eaf\u7684\u72b6\u6001\uff0c\u91cd\u590d\u4ee5\u4e0a\u8fc7\u7a0b\uff0c\u76f4\u5230\u7531\u201c.*?<\/strong>\u201d\u5339\u914d\u5230\u201cx<\/strong>\u201d\u4e3a\u6b62\uff0c\u518d\u628a\u63a7\u5236\u6743\u4ea4\u7ed9\u6b63\u5219\u8868\u8fbe\u5f0f\u6700\u540e\u7684\u201c“<\/strong>\u201d\u3002<\/p>\n

\u201c“<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\u540e\uff0c\u4ece\u4f4d\u7f6e6\u5904\u5c1d\u8bd5\u5339\u914d\uff0c\u7531\u201c“<\/strong>\u201d\u5339\u914d\u5b57\u7b26\u4e32\u6700\u540e\u7684\u201c“<\/strong>\u201d\uff0c\u5339\u914d\u6210\u529f\u3002<\/p>\n

\u6b64\u65f6\u6574\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\u6210\u529f\uff0c\u5176\u4e2d\u201c.*?<\/strong>\u201d\u5339\u914d\u7684\u5185\u5bb9\u4e3a\u201cRegex<\/strong>\u201d\uff0c\u5339\u914d\u8fc7\u7a0b\u4e2d\u8fdb\u884c\u4e86\u4e94\u6b21\u56de\u6eaf\u3002<\/p>\n

<\/a>2.2.2\u00a0 \u8d2a\u5a6a\u8fd8\u662f\u975e\u8d2a\u5a6a\u2014\u2014\u5339\u914d\u6548\u7387\u7684\u6289\u62e9<\/h3>\n

\u901a\u8fc7\u5339\u914d\u539f\u7406\u7684\u5206\u6790\uff0c\u53ef\u4ee5\u770b\u5230\uff0c\u5728\u5339\u914d\u6210\u529f\u7684\u60c5\u51b5\u4e0b\uff0c\u8d2a\u5a6a\u6a21\u5f0f\u8fdb\u884c\u4e86\u66f4\u5c11\u7684\u56de\u6eaf\uff0c\u800c\u56de\u6eaf\u7684\u8fc7\u7a0b\uff0c\u9700\u8981\u8fdb\u884c\u63a7\u5236\u6743\u7684\u4ea4\u63a5\uff0c\u8ba9\u51fa\u5df2\u5339\u914d\u5185\u5bb9\u6216\u5339\u914d\u672a\u5339\u914d\u5185\u5bb9\uff0c\u5e76\u91cd\u65b0\u5c1d\u8bd5\u5339\u914d\uff0c\u5728\u5f88\u5927\u7a0b\u5ea6\u4e0a\u964d\u4f4e\u5339\u914d\u6548\u7387\uff0c\u6240\u4ee5\u8d2a\u5a6a\u6a21\u5f0f\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f\u76f8\u6bd4\uff0c\u5b58\u5728\u5339\u914d\u6548\u7387\u4e0a\u7684\u4f18\u52bf\u3002<\/p>\n

\u4f462.2.1\u4e2d\u7684\u4f8b\u5b50\uff0c\u4ec5\u4ec5\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u5e94\u7528\uff0c\u8bfb\u8005\u770b\u5230\u8fd9\u91cc\u65f6\uff0c\u662f\u5426\u4f1a\u5b58\u5728\u8fd9\u6837\u7684\u7591\u95ee\uff0c\u8d2a\u5a6a\u6a21\u5f0f\u5c31\u4e00\u5b9a\u6bd4\u975e\u8d2a\u5a6a\u6a21\u5f0f\u5339\u914d\u6548\u7387\u9ad8\u5417\uff1f\u7b54\u6848\u662f\u5426\u5b9a\u7684\u3002<\/p>\n

\u4e3e\u4f8b<\/strong>\uff1a<\/p>\n

\u9700\u6c42\uff1a\u53d6\u5f97\u4e24\u4e2a\u201c“<\/strong>\u201d\u4e2d\u7684\u5b50\u4e32\uff0c\u5176\u4e2d\u4e0d\u80fd\u518d\u5305\u542b\u201c“<\/strong>\u201d\u3002<\/p>\n

\u6b63\u5219\u8868\u8fbe\u5f0f\u4e00\uff1a“.*”<\/strong><\/p>\n

\u6b63\u5219\u8868\u8fbe\u5f0f\u4e8c\uff1a“.*?”<\/strong><\/p>\n

\u60c5\u51b5\u4e00\uff1a\u5f53\u8d2a\u5a6a\u6a21\u5f0f\u5339\u914d\u5230\u66f4\u591a\u4e0d\u9700\u8981\u7684\u5185\u5bb9\u65f6\uff0c\u53ef\u80fd\u5b58\u5728\u6bd4\u975e\u8d2a\u5a6a\u6a21\u5f0f\u66f4\u591a\u7684\u56de\u6eaf\u3002\u6bd4\u5982\u6e90\u5b57\u7b26\u4e32\u4e3a\u201cThe word “Regex” means regular expression.<\/strong>\u201d\u3002<\/p>\n

\u60c5\u51b5\u4e8c\uff1a\u8d2a\u5a6a\u6a21\u5f0f\u65e0\u6cd5\u6ee1\u8db3\u9700\u6c42\u3002\u6bd4\u5982\u6e90\u5b57\u7b26\u4e32\u4e3a\u201cThe phrase “regular expression” is called “Regex” for short.\u201d\u3002<\/strong><\/p>\n

\u5bf9\u4e8e\u60c5\u51b5\u4e00\uff0c\u6b63\u5219\u8868\u8fbe\u5f0f\u4e00\u91c7\u7528\u7684\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u201c.*<\/strong>\u201d\u4f1a\u4e00\u76f4\u5339\u914d\u5230\u5b57\u7b26\u4e32\u7ed3\u675f\u4f4d\u7f6e\uff0c\u63a7\u5236\u6743\u4ea4\u7ed9\u6700\u540e\u7684\u201c\u201d<\/strong>\u201d\uff0c\u5339\u914d\u4e0d\u6210\u529f\u540e\uff0c\u518d\u8fdb\u884c\u56de\u6eaf\uff0c\u7531\u4e8e\u591a\u5339\u914d\u7684\u5185\u5bb9\u201cmeans regular expression.<\/strong>\u201d\u8fdc\u8fdc\u8d85\u8fc7\u9700\u5339\u914d\u5185\u5bb9\u672c\u8eab\uff0c\u6240\u4ee5\u91c7\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u4e00\u65f6\uff0c\u5339\u914d\u6548\u7387\u4f1a\u6bd4\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u4e8c\u7684\u975e\u8d2a\u5a6a\u6a21\u5f0f\u4f4e\u3002<\/p>\n

\u5bf9\u4e8e\u60c5\u51b5\u4e8c\uff0c\u6b63\u5219\u8868\u8fbe\u5f0f\u4e00\u5339\u914d\u5230\u7684\u662f\u201c“regular expression” is called “Regex”<\/strong>\u201d\uff0c\u8fde\u9700\u6c42\u90fd\u4e0d\u6ee1\u8db3\uff0c\u81ea\u7136\u4e5f\u8c08\u4e0d\u4e0a\u4ec0\u4e48\u5339\u914d\u6548\u7387\u7684\u9ad8\u4f4e\u4e86\u3002<\/p>\n

\u4ee5\u4e0a\u4e24\u79cd\u60c5\u51b5\u662f\u666e\u904d\u5b58\u5728\u7684\uff0c\u90a3\u4e48\u662f\u4e0d\u662f\u4e3a\u4e86\u6ee1\u8db3\u9700\u6c42\uff0c\u53c8\u517c\u987e\u6548\u7387\uff0c\u5c31\u53ea\u80fd\u4f7f\u7528\u975e\u8d2a\u5a6a\u6a21\u5f0f\u4e86\u5462\uff1f\u5f53\u7136\u4e0d\u662f\uff0c\u6839\u636e\u5b9e\u9645\u60c5\u51b5\uff0c\u53d8\u66f4\u5339\u914d\u4f18\u5148\u91cf\u8bcd\u4fee\u9970\u7684\u5b50\u8868\u8fbe\u5f0f\uff0c\u4e0d\u4f46\u53ef\u4ee5\u6ee1\u8db3\u9700\u6c42\uff0c\u8fd8\u53ef\u4ee5\u63d0\u9ad8\u5339\u914d\u6548\u7387\u3002<\/p>\n

\u6e90\u5b57\u7b26\u4e32\uff1a“Regex”<\/strong><\/p>\n

\u7ed9\u51fa\u6b63\u5219\u8868\u8fbe\u5f0f\u4e09\uff1a“[^”]*”<\/strong><\/p>\n

\u770b\u4e00\u4e0b\u6b63\u5219\u8868\u8fbe\u5f0f\u4e09\u7684\u5339\u914d\u8fc7\u7a0b\u3002<\/p>\n

\"2-3\"<\/p>\n

\n

\u56fe2-3<\/p>\n

\u9996\u5148\u7531\u7b2c\u4e00\u4e2a\u201c“<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\uff0c\u5339\u914d\u4f4d\u7f6e0\u4f4d\u7684\u201c“<\/strong>\u201d\uff0c\u5339\u914d\u6210\u529f\uff0c\u63a7\u5236\u6743\u4ea4\u7ed9\u201c[^”]*<\/strong>\u201d\u3002<\/p>\n

\u201c[^”]*<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\u540e\uff0c\u7531\u4e8e\u201c*<\/strong>\u201d\u662f\u5339\u914d\u4f18\u5148\u91cf\u8bcd\uff0c\u5728\u53ef\u5339\u914d\u53ef\u4e0d\u5339\u914d\u7684\u60c5\u51b5\u4e0b\uff0c\u4f18\u5148\u5c1d\u8bd5\u5339\u914d\u3002\u4ece\u4f4d\u7f6e1\u5904\u7684\u201cR<\/strong>\u201d\u5f00\u59cb\u5c1d\u8bd5\u5339\u914d\uff0c\u5339\u914d\u6210\u529f\uff0c\u7ee7\u7eed\u5411\u53f3\u5339\u914d\uff0c\u5339\u914d\u4f4d\u7f6e2\u5904\u7684\u201ce<\/strong>\u201d\uff0c\u5339\u914d\u6210\u529f\uff0c\u7ee7\u7eed\u5411\u53f3\u5339\u914d\uff0c\u76f4\u5230\u5339\u914d\u5230\u201cx<\/strong>\u201d\uff0c\u5339\u914d\u6210\u529f\uff0c\u518d\u5339\u914d\u7ed3\u5c3e\u7684\u201c\u201d<\/strong>\u201d\u65f6\uff0c\u5339\u914d\u5931\u8d25\uff0c\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u6b63\u5219\u8868\u8fbe\u5f0f\u6700\u540e\u7684\u201c“<\/strong>\u201d\u3002<\/p>\n

\u201c\u201d<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\u540e\uff0c\u5339\u914d\u5b57\u7b26\u4e32\u7ed3\u5c3e\u5904\u7684\u201c\u201d<\/strong>\u201d\uff0c\u5339\u914d\u6210\u529f\u3002<\/p>\n

\u6b64\u65f6\u6574\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\u6210\u529f\uff0c\u5176\u4e2d\u201c[^”]*<\/strong>\u201d\u5339\u914d\u7684\u5185\u5bb9\u4e3a\u201cRegex<\/strong>\u201d\uff0c\u5339\u914d\u8fc7\u7a0b\u4e2d\u6ca1\u6709\u8fdb\u884c\u56de\u6eaf\u3002<\/p>\n

\u5c06\u91cf\u8bcd\u4fee\u9970\u7684\u5b50\u8868\u8fbe\u5f0f\u7531\u8303\u56f4\u8f83\u5927\u7684\u201c.<\/strong>\u201d\uff0c\u6362\u6210\u4e86\u6392\u9664\u578b\u5b57\u7b26\u7ec4\u201c[^”]<\/strong>\u201d\uff0c\u4f7f\u7528\u7684\u4ecd\u662f\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u5f88\u5b8c\u7f8e\u7684\u89e3\u51b3\u4e86\u9700\u6c42\u548c\u6548\u7387\u95ee\u9898\u3002\u5f53\u7136\uff0c\u7531\u4e8e\u8fd9\u4e00\u5339\u914d\u8fc7\u7a0b\u6ca1\u6709\u8fdb\u884c\u56de\u6eaf\uff0c\u6240\u4ee5\u4e5f\u4e0d\u9700\u8981\u8bb0\u5f55\u56de\u6eaf\u72b6\u6001\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u4f7f\u7528\u56fa\u5316\u5206\u7ec4\uff0c\u5bf9\u6b63\u5219\u505a\u8fdb\u4e00\u6b65\u7684\u4f18\u5316\u3002<\/p>\n

\u7ed9\u51fa\u6b63\u5219\u8868\u8fbe\u5f0f\u56db\uff1a“(?>[^”]*)”<\/strong><\/p>\n

\u56fa\u5316\u5206\u7ec4\u5e76\u4e0d\u662f\u6240\u6709\u8bed\u8a00\u90fd\u652f\u6301\u7684\uff0c\u5982.NET\u652f\u6301\uff0c\u800cJava\u5c31\u4e0d\u652f\u6301\uff0c\u4f46\u662f\u5728Java\u4e2d\u5374\u53ef\u4ee5\u4f7f\u7528\u66f4\u7b80\u5355\u7684\u5360\u6709\u4f18\u5148\u91cf\u8bcd\u6765\u4ee3\u66ff\uff1a“[^”]*+”<\/strong>\u3002<\/p>\n

<\/a>3\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u8d2a\u5a6a\u8fd8\u662f\u975e\u8d2a\u5a6a\u6a21\u5f0f\u2014\u2014\u518d\u8c08\u5339\u914d\u6548\u7387<\/h1>\n

\u4e00\u822c\u6765\u8bf4\uff0c\u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u5982\u679c\u91cf\u8bcd\u4fee\u9970\u7684\u5b50\u8868\u8fbe\u5f0f\u76f8\u540c\uff0c\u6bd4\u5982\u201c.*<\/strong>\u201d\u548c\u201c.*?<\/strong>\u201d\uff0c\u5b83\u4eec\u7684\u5e94\u7528\u573a\u666f\u901a\u5e38\u662f\u4e0d\u540c\u7684\uff0c\u6240\u4ee5\u6548\u7387\u4e0a\u4e00\u822c\u4e0d\u5177\u6709\u53ef\u6bd4\u6027\u3002<\/p>\n

\u800c\u5bf9\u4e8e\u6539\u53d8\u91cf\u8bcd\u4fee\u9970\u7684\u5b50\u8868\u8fbe\u5f0f\uff0c\u4ee5\u6ee1\u8db3\u9700\u6c42\u65f6\uff0c\u6bd4\u5982\u628a\u201c.*<\/strong>\u201d\u6539\u4e3a\u201c[^”]*<\/strong>\u201d\uff0c\u7531\u4e8e\u4fee\u9970\u7684\u5b50\u8868\u8fbe\u5f0f\u5df2\u4e0d\u540c\uff0c\u4e5f\u4e0d\u5177\u6709\u76f4\u63a5\u7684\u53ef\u5bf9\u6bd4\u6027\u3002\u4f46\u662f\u5728\u76f8\u540c\u7684\u5b50\u8868\u8fbe\u5f0f\uff0c\u53c8\u90fd\u53ef\u4ee5\u6ee1\u8db3\u9700\u6c42\u7684\u60c5\u51b5\u4e0b\uff0c\u6bd4\u5982\u201c[^”]*<\/strong>\u201d\u548c\u201c[^”]*?<\/strong>\u201d\uff0c\u8d2a\u5a6a\u6a21\u5f0f\u7684\u5339\u914d\u6548\u7387\u901a\u5e38\u8981\u9ad8\u4e9b\u3002<\/p>\n

\u540c\u65f6\u8fd8\u6709\u4e00\u4e2a\u4e8b\u5b9e\u5c31\u662f\uff0c\u975e\u8d2a\u5a6a\u6a21\u5f0f\u53ef\u4ee5\u5b9e\u73b0\u7684\uff0c\u901a\u8fc7\u4f18\u5316\u91cf\u8bcd\u4fee\u9970\u7684\u5b50\u8868\u8fbe\u5f0f\u7684\u8d2a\u5a6a\u6a21\u5f0f\u90fd\u53ef\u4ee5\u5b9e\u73b0\uff0c\u800c\u8d2a\u5a6a\u6a21\u5f0f\u53ef\u4ee5\u5b9e\u73b0\u7684\u4e00\u4e9b\u4f18\u5316\u6548\u679c\uff0c\u5374\u672a\u5fc5\u662f\u975e\u8d2a\u5a6a\u6a21\u5f0f\u53ef\u4ee5\u5b9e\u73b0\u7684\u3002<\/p>\n

\u8d2a\u5a6a\u6a21\u5f0f\u8fd8\u6709\u4e00\u70b9\u4f18\u52bf\uff0c\u5c31\u662f\u5728\u5339\u914d\u5931\u8d25\u65f6\uff0c\u8d2a\u5a6a\u6a21\u5f0f\u53ef\u4ee5\u66f4\u5feb\u901f\u7684\u62a5\u544a\u5931\u8d25\uff0c\u4ece\u800c\u63d0\u5347\u5339\u914d\u6548\u7387\u3002\u4e0b\u9762\u5c06\u5168\u9762\u8003\u5bdf\u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f\u7684\u5339\u914d\u6548\u7387\u3002<\/p>\n

<\/a>3.1\u00a0\u00a0\u00a0\u00a0 \u6548\u7387\u63d0\u5347\u2014\u2014\u6f14\u8fdb\u8fc7\u7a0b<\/h2>\n

\u5728\u4e86\u89e3\u4e86\u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f\u7684\u5339\u914d\u57fa\u672c\u539f\u7406\u4e4b\u540e\uff0c\u6211\u4eec\u518d\u6765\u91cd\u65b0\u770b\u4e00\u4e0b\u6b63\u5219\u6548\u7387\u63d0\u5347\u7684\u6f14\u8fdb\u8fc7\u7a0b\u3002<\/p>\n

\u9700\u6c42\uff1a\u53d6\u5f97\u4e24\u4e2a\u201c“<\/strong>\u201d\u4e2d\u7684\u5b50\u4e32\uff0c\u5176\u4e2d\u4e0d\u80fd\u518d\u5305\u542b\u201c“<\/strong>\u201d\u3002<\/p>\n

\u6e90\u5b57\u7b26\u4e32\uff1aThe phrase “regular expression” is called “Regex” for short.<\/strong><\/p>\n

\u6b63\u5219\u8868\u8fbe\u5f0f\u4e00\uff1a“.*”<\/strong><\/p>\n

\u6b63\u5219\u8868\u8fbe\u5f0f\u4e00\u5339\u914d\u7684\u5185\u5bb9\u4e3a\u201c“regular expression” is called “Regex”<\/strong>\u201d\uff0c\u4e0d\u7b26\u5408\u8981\u6c42\u3002<\/p>\n

\u63d0\u51fa\u6b63\u5219\u8868\u8fbe\u5f0f\u4e8c\uff1a“.*?”<\/strong><\/p>\n

\u9996\u5148\u201c“<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\uff0c\u7531\u4f4d\u7f6e0\u4f4d\u5f00\u59cb\u5c1d\u8bd5\u5339\u914d\uff0c\u76f4\u5230\u4f4d\u7f6e11\u5904\u5339\u914d\u6210\u529f\uff0c\u63a7\u5236\u6743\u4ea4\u7ed9\u201c.*?<\/strong>\u201d\uff0c\u5339\u914d\u8fc7\u7a0b\u540c2.2.1\u4e2d\u975e\u8d2a\u5a6a\u6a21\u5f0f\u7684\u5339\u914d\u8fc7\u7a0b\u3002\u201c.*?<\/strong>\u201d\u5339\u914d\u7684\u5185\u5bb9\u4e3a\u201cRegex<\/strong>\u201d\uff0c\u5339\u914d\u8fc7\u7a0b\u4e2d\u8fdb\u884c\u4e86\u56db\u6b21\u56de\u6eaf\u3002<\/p>\n

\u5982\u4f55\u6d88\u9664\u56de\u6eaf\u5e26\u6765\u7684\u5339\u914d\u6548\u7387\u7684\u635f\u5931\uff0c\u5c31\u662f\u4f7f\u7528\u66f4\u5c0f\u8303\u56f4\u7684\u5b50\u8868\u8fbe\u5f0f\uff0c\u91c7\u7528\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u63d0\u51fa\u6b63\u5219\u8868\u8fbe\u5f0f\u4e09\uff1a“[^”]*”<\/strong><\/p>\n

\u9996\u5148\u201c“<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\uff0c\u7531\u4f4d\u7f6e0\u4f4d\u5f00\u59cb\u5c1d\u8bd5\u5339\u914d\uff0c\u76f4\u5230\u4f4d\u7f6e11\u5904\u5339\u914d\u6210\u529f\uff0c\u63a7\u5236\u6743\u4ea4\u7ed9\u201c[^”]*<\/strong>\u201d\uff0c\u5339\u914d\u8fc7\u7a0b\u540c2.2.2\u8282\u4e2d\u975e\u8d2a\u5a6a\u6a21\u5f0f\u7684\u5339\u914d\u8fc7\u7a0b\u3002\u201c[^”]*<\/strong>\u201d\u5339\u914d\u7684\u5185\u5bb9\u4e3a\u201cRegex<\/strong>\u201d\uff0c\u5339\u914d\u8fc7\u7a0b\u4e2d\u6ca1\u6709\u8fdb\u884c\u56de\u6eaf\u3002<\/p>\n

<\/a>3.2\u00a0\u00a0\u00a0\u00a0 \u6548\u7387\u63d0\u5347\u2014\u2014\u66f4\u5feb\u7684\u62a5\u544a\u5931\u8d25<\/h2>\n

\u4ee5\u4e0a\u8ba8\u8bba\u7684\u662f\u5339\u914d\u6210\u529f\u7684\u6f14\u8fdb\u8fc7\u7a0b\uff0c\u800c\u5bf9\u4e8e\u4e00\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u5728\u5339\u914d\u5931\u8d25\u7684\u60c5\u51b5\u4e0b\uff0c\u5982\u679c\u80fd\u591f\u4ee5\u6700\u5feb\u7684\u901f\u5ea6\u62a5\u544a\u5339\u914d\u5931\u8d25\uff0c\u4e5f\u4f1a\u63d0\u5347\u5339\u914d\u6548\u7387\uff0c\u8fd9\u6216\u8bb8\u662f\u6211\u4eec \u8bbe\u8ba1\u6b63\u5219\u8fc7\u7a0b\u4e2d\u6700\u5bb9\u6613\u5ffd\u7565\u7684\u3002\u800c\u5728\u6e90\u5b57\u7b26\u4e32\u6570\u636e\u91cf\u975e\u5e38\u5927\uff0c\u6216\u6b63\u5219\u8868\u8fbe\u5f0f\u6bd4\u8f83\u590d\u6742\u7684\u60c5\u51b5\u4e0b\uff0c\u662f\u5426\u80fd\u591f\u5feb\u901f\u62a5\u544a\u5339\u914d\u5931\u8d25\uff0c\u5c06\u5bf9\u5339\u914d\u6548\u7387\u4ea7\u751f\u76f4\u63a5\u7684\u5f71\u54cd\u3002<\/p>\n

\u4e0b\u9762\u5c06\u6784\u5efa\u5339\u914d\u5931\u8d25\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u5bf9\u5339\u914d\u8fc7\u7a0b\u8fdb\u884c\u5206\u6790\u3002<\/p>\n

\u4ee5\u4e0b\u5339\u914d\u8fc7\u7a0b\u5206\u6790\u4e2d\uff0c\u6e90\u5b57\u7b26\u4e32\u7edf\u4e00\u4e3a\uff1aThe phrase “regular expression” is called “Regex” for short.<\/strong><\/p>\n

<\/a>3.2.1\u00a0 \u975e\u8d2a\u5a6a\u6a21\u5f0f\u5339\u914d\u5931\u8d25\u8fc7\u7a0b\u5206\u6790<\/h3>\n

 <\/p>\n

\u00a0\"3-1\"<\/p>\n

\u56fe3-1<\/p>\n

\u6784\u5efa\u5339\u914d\u5931\u8d25\u7684\u975e\u8d2a\u5a6a\u6a21\u5f0f\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\uff1a“.*?”@<\/strong><\/p>\n

\u7531\u4e8e\u6700\u540e\u7684\u201c@<\/strong>\u201d\u7684\u5b58\u5728\uff0c\u8fd9\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u6700\u540e\u4e00\u5b9a\u662f\u5339\u914d\u5931\u8d25\u7684\uff0c\u90a3\u4e48\u770b\u4e00\u4e0b\u5339\u914d\u8fc7\u7a0b\u3002<\/p>\n

\u9996\u5148\u7531\u201c“<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\uff0c\u7531\u4f4d\u7f6e0\u5904\u5f00\u59cb\u5c1d\u8bd5\u5339\u914d\uff0c\u5339\u914d\u5931\u8d25\uff0c\u76f4\u5230\u56fe\u4e2d\u6807\u793a\u7684A\u5904\u5339\u914d\u6210\u529f\uff0c\u63a7\u5236\u6743\u4ea4\u7ed9\u201c.*?<\/strong>\u201d\u3002<\/p>\n

\u201c.*?<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\u540e\uff0c\u7531A\u540e\u9762\u7684\u4f4d\u7f6e\u5f00\u59cb\u5c1d\u8bd5\u5339\u914d\uff0c\u7531\u4e8e\u662f\u975e\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u9996\u5148\u5ffd\u7565\u5339\u914d\uff0c\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u201c“<\/strong>\u201d\uff0c\u540c\u65f6\u8bb0\u5f55\u4e00\u4e0b\u56de\u6eaf\u72b6\u6001\u3002\u201c“<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\u540e\uff0c\u7531A\u540e\u9762\u7684\u4f4d\u7f6e\u5f00\u59cb\u5c1d\u8bd5\u5339\u914d\uff0c\u5339\u914d\u5b57\u7b26\u201cr<\/strong>\u201d\u5931\u8d25\uff0c\u67e5\u627e\u53ef\u4f9b\u56de\u6eaf\u7684\u72b6\u6001\uff0c\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u201c.*?<\/strong>\u201d\uff0c\u7531\u201c.*?<\/strong>\u201d\u5339\u914d\u5b57\u7b26\u201cr<\/strong>\u201d\u3002\u91cd\u590d\u4ee5\u4e0a\u8fc7\u7a0b\uff0c\u76f4\u5230\u201c.*?<\/strong>\u201d\u5339\u914d\u4e86B\u5904\u524d\u9762\u7684\u5b57\u7b26\u201cn<\/strong>\u201d\uff0c\u201c“<\/strong>\u201d\u5339\u914d\u4e86B\u5904\u7684\u5b57\u7b26\u201c\u201d<\/strong>\u201d\uff0c\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u201c@<\/strong>\u201d\u3002\u7531\u201c@<\/strong>\u201d\u5339\u914d\u63a5\u4e0b\u6765\u7684\u7a7a\u683c\u201c\u201d\uff0c\u5339\u914d\u5931\u8d25\uff0c\u67e5\u627e\u53ef\u4f9b\u56de\u6eaf\u7684\u72b6\u6001\uff0c\u63a7\u5236\u6743\u4ea4\u7ed9\u201c.*?<\/strong>\u201d\uff0c\u7531\u201c.*?<\/strong>\u201d\u5339\u914d\u7a7a\u683c\u3002\u7ee7\u7eed\u91cd\u590d\u4ee5\u4e0a\u5339\u914d\u8fc7\u7a0b\uff0c\u76f4\u5230\u7531\u201c.*?<\/strong>\u201d\u5339\u914d\u5230\u5b57\u7b26\u4e32\u7ed3\u675f\u4f4d\u7f6e\uff0c\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u201c“<\/strong>\u201d\u3002\u7531\u4e8e\u5df2\u7ecf\u662f\u5b57\u7b26\u4e32\u7ed3\u675f\u4f4d\u7f6e\uff0c\u5339\u914d\u5931\u8d25\uff0c\u62a5\u544a\u6574\u4e2a\u8868\u8fbe\u5f0f\u5728\u4f4d\u7f6e11\u5904\u5339\u914d\u5931\u8d25\uff0c\u4e00\u8f6e\u5339\u914d\u5c1d\u8bd5\u7ed3\u675f\u3002<\/p>\n

\u6b63\u5219\u5f15\u64ce\u4f20\u52a8\u88c5\u7f6e\u4f7f\u6b63\u5219\u5411\u524d\u4f20\u52a8\uff0c\u8fdb\u5165\u4e0b\u4e00\u8f6e\u5c1d\u8bd5\u3002\u540e\u7eed\u5339\u914d\u8fc7\u7a0b\u4e0e\u7b2c\u4e00\u8f6e\u5c1d\u8bd5\u5339\u914d\u8fc7\u7a0b\u57fa\u672c\u7c7b\u4f3c\uff0c\u53ef\u4ee5\u53c2\u8003\u56fe3-1\u3002<\/p>\n

\u4ece\u5339\u914d\u8fc7\u7a0b\u4e2d\u53ef\u4ee5\u770b\u5230\uff0c\u975e\u8d2a\u5a6a\u6a21\u5f0f\u7684\u5339\u914d\u5931\u8d25\u8fc7\u7a0b\uff0c\u51e0\u4e4e\u6bcf\u4e00\u6b65\u90fd\u4f34\u968f\u7740\u56de\u6eaf\u8fc7\u7a0b\uff0c\u5bf9\u5339\u914d\u6548\u7387\u7684\u5f71\u54cd\u662f\u5f88\u5927\u7684\u3002<\/p>\n

<\/a>3.2.2\u00a0 \u8d2a\u5a6a\u6a21\u5f0f\u5339\u914d\u5931\u8d25\u8fc7\u7a0b\u5206\u6790\u2014\u2014\u5927\u8303\u56f4\u5b50\u8868\u8fbe\u5f0f<\/h3>\n

\"3-2\"<\/p>\n

\n

\u56fe3-2<\/p>\n

PS\uff1a\u4ee5\u4e0a\u5206\u6790\u8fc7\u7a0b\u56fe\u793a\u53c2\u8003\u4e86\u300a\u7cbe\u901a\u6b63\u5219\u8868\u8fbe\u5f0f\u300b\u4e00\u4e66\u76f8\u5173\u7ae0\u8282\u56fe\u793a\u3002<\/p>\n

\u6784\u5efa\u5339\u914d\u5931\u8d25\u7684\u8d2a\u5a6a\u6a21\u5f0f\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\uff1a“.*”@<\/strong><\/p>\n

\u5176\u4e2d\u91cf\u8bcd\u4fee\u9970\u7684\u5b50\u8868\u8fbe\u5f0f\u4e3a\u5339\u914d\u8303\u56f4\u8f83\u5927\u7684\u201c.<\/strong>\u201d\uff0c\u7531\u4e8e\u6700\u540e\u7684\u201c@<\/strong>\u201d\u7684\u5b58\u5728\uff0c\u8fd9\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u6700\u540e\u4e5f\u662f\u4e00\u5b9a\u5339\u914d\u5931\u8d25\u7684\uff0c\u770b\u4e00\u4e0b\u5339\u914d\u8fc7\u7a0b\u3002<\/p>\n

\u9996\u5148\u7531\u201c“<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\uff0c\u7531\u4f4d\u7f6e0\u5904\u5f00\u59cb\u5c1d\u8bd5\u5339\u914d\uff0c\u5339\u914d\u5931\u8d25\uff0c\u76f4\u5230\u56fe\u4e2d\u6807\u793a\u7684A\u5904\u5339\u914d\u6210\u529f\uff0c\u63a7\u5236\u6743\u4ea4\u7ed9\u201c.*<\/strong>\u201d\u3002<\/p>\n

\u201c.*<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\u540e\uff0c\u7531A\u540e\u9762\u7684\u4f4d\u7f6e\u5f00\u59cb\u5c1d\u8bd5\u5339\u914d\uff0c\u7531\u4e8e\u662f\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u4f18\u5316\u5c1d\u8bd5\u5339\u914d\uff0c\u4e00\u76f4\u5339\u914d\u5230\u5b57\u7b26\u4e32\u7684\u7ed3\u675f\u4f4d\u7f6e\uff0c\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u201c“<\/strong>\u201d\u3002\u201c“<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\u540e\uff0c\u7531\u4e8e\u5df2\u7ecf\u662f\u5b57\u7b26\u4e32\u7684\u7ed3\u675f\u4f4d\u7f6e\uff0c\u5339\u914d\u5931\u8d25\uff0c\u67e5\u627e\u53ef\u4f9b\u56de\u6eaf\u7684\u72b6\u6001\uff0c\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u201c.*<\/strong>\u201d\uff0c\u7531\u201c.*<\/strong>\u201d\u8ba9\u51fa\u5df2\u5339\u914d\u5b57\u7b26\u201c.<\/strong>\u201d\u3002\u91cd\u590d\u4ee5\u4e0a\u8fc7\u7a0b\uff0c\u76f4\u5230\u540e\u9762\u201c“<\/strong>\u201d\u5339\u914d\u4e86C\u5904\u540e\u9762\u7684\u5b57\u7b26\u201c\u201d<\/strong>\u201d\uff0c\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u201c@<\/strong>\u201d\u3002\u7531\u201c@<\/strong>\u201d\u5339\u914d\u63a5\u4e0b\u6765D\u5904\u7684\u7a7a\u683c\u201c\u201d\uff0c\u5339\u914d\u5931\u8d25\uff0c\u67e5\u627e\u53ef\u4f9b\u56de\u6eaf\u7684\u72b6\u6001\uff0c\u63a7\u5236\u6743\u4ea4\u7ed9\u201c.*<\/strong>\u201d\uff0c\u7531\u201c.*<\/strong>\u201d\u8ba9\u51fa\u5df2\u5339\u914d\u6587\u672c\u3002\u7ee7\u7eed\u91cd\u590d\u4ee5\u4e0a\u5339\u914d\u8fc7\u7a0b\uff0c\u76f4\u5230\u7531\u201c.*<\/strong>\u201d\u8ba9\u51fa\u6240\u6709\u5df2\u5339\u914d\u7684\u6587\u672c\u5230I\u5904\uff0c\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u201c“<\/strong>\u201d\u3002\u201c“<\/strong>\u201d\u5339\u914d\u5931\u8d25\uff0c\u7531\u4e8e\u5df2\u7ecf\u6ca1\u6709\u53ef\u4f9b\u56de\u6eaf\u7684\u72b6\u6001\uff0c\u62a5\u544a\u6574\u4e2a\u8868\u8fbe\u5f0f\u5728\u4f4d\u7f6e11\u5904\u5339\u914d\u5931\u8d25\uff0c\u4e00\u8f6e\u5339\u914d\u5c1d\u8bd5\u7ed3\u675f\u3002<\/p>\n

\u6b63\u5219\u5f15\u64ce\u4f20\u52a8\u88c5\u7f6e\u4f7f\u6b63\u5219\u5411\u524d\u4f20\u52a8\uff0c\u8fdb\u5165\u4e0b\u4e00\u8f6e\u5c1d\u8bd5\u3002\u540e\u7eed\u5339\u914d\u8fc7\u7a0b\u4e0e\u7b2c\u4e00\u8f6e\u5c1d\u8bd5\u5339\u914d\u8fc7\u7a0b\u57fa\u672c\u7c7b\u4f3c\uff0c\u53ef\u4ee5\u53c2\u8003\u56fe3-2\u3002<\/p>\n

\u4ece\u5339\u914d\u8fc7\u7a0b\u4e2d\u53ef\u4ee5\u770b\u5230\uff0c\u5927\u8303\u56f4\u5b50\u8868\u8fbe\u5f0f\u8d2a\u5a6a\u6a21\u5f0f\u7684\u5339\u914d\u5931\u8d25\u8fc7\u7a0b\uff0c\u4ece\u603b\u4f53\u4e0a\u770b\uff0c\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f\u6ca1\u6709\u4ec0\u4e48\u533a\u522b\uff0c\u6700\u7ec8\u8fdb\u884c\u7684\u56de\u6eaf\u6b21\u6570\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f\u57fa\u672c\u4e00\u81f4\uff0c\u5bf9\u5339\u914d\u6548\u7387\u7684\u5f71\u54cd\u4ecd\u7136\u5f88\u5927\u3002<\/p>\n

<\/a>3.2.3\u00a0 \u8d2a\u5a6a\u6a21\u5f0f\u5339\u914d\u5931\u8d25\u8fc7\u7a0b\u5206\u6790\u2014\u2014\u6539\u8fdb\u7684\u5b50\u8868\u8fbe\u5f0f<\/h3>\n

\"3-3\"<\/p>\n

\n

\u56fe3-3<\/p>\n

\u6784\u5efa\u5339\u914d\u5931\u8d25\u7684\u8d2a\u5a6a\u6a21\u5f0f\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\uff1a“[^”]*”@<\/strong><\/p>\n

\u5176\u4e2d\u91cf\u8bcd\u4fee\u9970\u7684\u5b50\u8868\u8fbe\u5f0f\uff0c\u6539\u4e3a\u5339\u914d\u8303\u56f4\u8f83\u5c0f\u7684\u6392\u9664\u578b\u5b57\u7b26\u7ec4\u201c[^”]<\/strong>\u201d\uff0c\u7531\u4e8e\u6700\u540e\u7684\u201c@<\/strong>\u201d\u7684\u5b58\u5728\uff0c\u8fd9\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u6700\u540e\u4e5f\u662f\u4e00\u5b9a\u5339\u914d\u5931\u8d25\u7684\uff0c\u770b\u4e00\u4e0b\u5339\u914d\u8fc7\u7a0b\u3002<\/p>\n

\u9996\u5148\u7531\u201c“<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\uff0c\u7531\u4f4d\u7f6e0\u5904\u5f00\u59cb\u5c1d\u8bd5\u5339\u914d\uff0c\u5339\u914d\u5931\u8d25\uff0c\u76f4\u5230\u56fe\u4e2d\u6807\u793a\u7684A\u5904\u5339\u914d\u6210\u529f\uff0c\u63a7\u5236\u6743\u4ea4\u7ed9\u201c[^”]*<\/strong>\u201d\u3002<\/p>\n

\u201c[^”]*<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\u540e\uff0c\u7531A\u540e\u9762\u7684\u4f4d\u7f6e\u5f00\u59cb\u5c1d\u8bd5\u5339\u914d\uff0c\u7531\u4e8e\u662f\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u4f18\u5148\u5c1d\u8bd5\u5339\u914d\uff0c\u4e00\u76f4\u5339\u914d\u5230B\u5904\uff0c\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u201c“<\/strong>\u201d\u3002\u201c“<\/strong>\u201d\u5339\u914d\u63a5\u4e0b\u6765\u7684\u7684\u5b57\u7b26\u201c“<\/strong>\u201d\uff0c\u5339\u914d\u6210\u529f\uff0c\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u201c@<\/strong>\u201d\u3002\u7531\u201c@<\/strong>\u201d\u5339\u914d\u63a5\u4e0b\u6765\u7684\u7a7a\u683c\u201c\u201d\uff0c\u5339\u914d\u5931\u8d25\uff0c\u67e5\u627e\u53ef\u4f9b\u56de\u6eaf\u7684\u72b6\u6001\uff0c\u63a7\u5236\u6743\u4ea4\u7ed9\u201c[^”]*<\/strong>\u201d\uff0c\u7531\u201c[^”]*<\/strong>\u201d\u8ba9\u51fa\u5df2\u5339\u914d\u6587\u672c\u3002\u7ee7\u7eed\u91cd\u590d\u4ee5\u4e0a\u5339\u914d\u8fc7\u7a0b\uff0c\u76f4\u5230\u7531\u201c[^”]*<\/strong>\u201d\u8ba9\u51fa\u6240\u6709\u5df2\u5339\u914d\u7684\u6587\u672c\u5230C\u5904\uff0c\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u201c“<\/strong>\u201d\u3002\u201c“<\/strong>\u201d\u5339\u914d\u5931\u8d25\uff0c\u7531\u4e8e\u5df2\u7ecf\u6ca1\u6709\u53ef\u4f9b\u56de\u6eaf\u7684\u72b6\u6001\uff0c\u62a5\u544a\u6574\u4e2a\u8868\u8fbe\u5f0f\u5728\u4f4d\u7f6e11\u5904\u5339\u914d\u5931\u8d25\uff0c\u4e00\u8f6e\u5339\u914d\u5c1d\u8bd5\u7ed3\u675f\u3002<\/p>\n

\u6b63\u5219\u5f15\u64ce\u4f20\u52a8\u88c5\u7f6e\u4f7f\u6b63\u5219\u5411\u524d\u4f20\u52a8\uff0c\u8fdb\u5165\u4e0b\u4e00\u8f6e\u5c1d\u8bd5\u3002\u540e\u7eed\u5339\u914d\u8fc7\u7a0b\u4e0e\u7b2c\u4e00\u8f6e\u5c1d\u8bd5\u5339\u914d\u8fc7\u7a0b\u57fa\u672c\u7c7b\u4f3c\uff0c\u53ef\u4ee5\u53c2\u8003\u56fe3-3\u3002<\/p>\n

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<\/a>3.2.4\u00a0 \u8d2a\u5a6a\u6a21\u5f0f\u5339\u914d\u5931\u8d25\u8fc7\u7a0b\u5206\u6790\u2014\u2014\u56fa\u5316\u5206\u7ec4<\/h3>\n

\u901a\u8fc73.2.3\u8282\u7684\u5206\u6790\u53ef\u4ee5\u77e5\u9053\uff0c\u7531\u4e8e\u201c[^”]*<\/strong>\u201d\u4f7f\u7528\u4e86\u6392\u9664\u578b\u5b57\u7b26\u7ec4\uff0c\u90a3\u4e48\u56fe3-3\u4e2d\uff0c\u5728A\u548cB\u4e4b\u95f4\u88ab\u5339\u914d\u5230\u7684\u5b57\u7b26\uff0c\u5c31\u4e00\u5b9a\u4e0d\u4f1a\u662f\u5b57\u7b26\u201c“<\/strong>\u201d\uff0c\u6240\u4ee5B\u5230C\u4e4b\u95f4\u56de\u6eaf\u8fc7\u7a0b\u5c31\u662f\u591a\u4f59\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\u5728\u8fd9\u4e4b\u95f4\u7684\u53ef\u4f9b\u56de\u6eaf\u7684\u72b6\u6001\u5b8c\u5168\u53ef\u4ee5\u4e0d\u8bb0\u5f55\u3002.NET\u4e2d\u53ef\u4ee5\u4f7f\u7528\u56fa\u5316\u5206\u7ec4\uff0cJava\u4e2d\u53ef\u4ee5\u4f7f\u7528\u5360\u6709\u4f18\u5148\u91cf\u8bcd\u6765\u5b9e\u73b0\u8fd9\u4e00\u6548\u679c\u3002<\/p>\n

\"3-4\"<\/p>\n

\n

\u56fe3-4<\/p>\n

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<\/a>3.3\u00a0\u00a0\u00a0\u00a0 \u975e\u8d2a\u5a6a\u6a21\u5f0f\u5411\u8d2a\u5a6a\u6a21\u5f0f\u7684\u8f6c\u6362<\/h2>\n

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\u6e90\u5b57\u7b26\u4e32\uff1a<img src=”\/img\/logo.gif” title=”\u6d4b\u8bd5” \/><\/strong><\/p>\n

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\u6b63\u5219\u8868\u8fbe\u5f0f\u4e8c\uff1a<imgb.*?src=”([^”]*)”[^>]*><\/strong><\/p>\n

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\u6b63\u5219\u8868\u8fbe\u5f0f\u4e09\uff1a<imgb(?:(?!src=).)*src=”([^”]*)”[^>]*><\/strong><\/p>\n

\u201c(?!src=).<\/strong>\u201d\u8868\u793a\u8fd9\u6837\u4e00\u4e2a\u5b57\u7b26\uff0c\u4ece\u5b83\u5f00\u59cb\uff0c\u53f3\u4fa7\u4e0d\u80fd\u662f\u5b57\u7b26\u5e8f\u5217\u201csrc=<\/strong>\u201d\uff0c\u800c\u201c(?:(?!src=).)*<\/strong>\u201d\u5c31\u8868\u793a\u7b26\u5408\u4e0a\u9762\u89c4\u5219\u7684\u5b57\u7b26\uff0c\u67090\u4e2a\u6216\u65e0\u9650\u591a\u4e2a\u3002\u8fd9\u6837\u5c31\u8fbe\u5230\u6392\u9664\u5b57\u7b26\u5e8f\u5217\u7684\u76ee\u7684\uff0c\u5b9e\u73b0\u7684\u6548\u679c\u540c\u6392\u9664\u578b\u5b57\u7b26\u7ec4\u4e00\u6837\uff0c\u53ea\u4e0d\u8fc7\u6392\u9664\u578b\u5b57\u7b26\u7ec4\u6392\u9664\u7684\u662f\u4e00\u4e2a\u6216\u591a\u4e2a\u5b57\u7b26\uff0c\u800c\u8fd9\u79cd\u73af\u89c6\u7ed3\u6784\u6392\u9664\u7684\u662f\u4e00\u4e2a\u6216\u591a\u4e2a\u6709\u5e8f\u7684\u5b57\u7b26\u5e8f\u5217\u3002<\/p>\n

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\u6bd4\u5982\u4e0a\u9762\u53d6\u5f97img\u6807\u7b7e\u4e2d\u7684\u56fe\u7247\u5730\u5740\u9700\u6c42\uff0c\u57fa\u672c\u4e0a\u7528\u6b63\u5219\u8868\u8fbe\u4e8c\u5c31\u53ef\u4ee5\u4e86\uff1b\u5bf9\u4e8e\u590d\u6742\u7684\u5e94\u7528\uff0c\u5982\u5e73\u8861\u7ec4\u4e2d\uff0c\u5c31\u9700\u8981\u4f7f\u7528\u7ed3\u5408\u73af\u89c6\u7684\u8d2a\u5a6a\u6a21\u5f0f\u4e86\u3002<\/p>\n

\u4ee5\u5339\u914d\u5d4c\u5957div\u6807\u7b7e\u7684\u5e73\u8861\u7ec4\u4e3a\u4f8b\uff1a<\/p>\n

Regex reg = new Regex(@”(?isx)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0 #\u5339\u914d\u6a21\u5f0f\uff0c\u5ffd\u7565\u5927\u5c0f\u5199\uff0c\u201c.\u201d\u5339\u914d\u4efb\u610f\u5b57\u7b26<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <div[^>]*>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 #\u5f00\u59cb\u6807\u8bb0\u201c<div…>\u201d<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 (?>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 #\u5206\u7ec4\u6784\u9020\uff0c\u7528\u6765\u9650\u5b9a\u91cf\u8bcd\u201c*\u201d\u4fee\u9970\u8303\u56f4<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0<div[^>]*>\u00a0 (?<Open>)\u00a0\u00a0 #\u547d\u540d\u6355\u83b7\u7ec4\uff0c\u9047\u5230\u5f00\u59cb\u6807\u8bb0\uff0c\u5165\u6808\uff0cOpen\u8ba1\u6570\u52a01<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 #\u5206\u652f\u7ed3\u6784<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/div>\u00a0 (?<-Open>)\u00a0\u00a0\u00a0\u00a0\u00a0 #\u72ed\u4e49\u5e73\u8861\u7ec4\uff0c\u9047\u5230\u7ed3\u675f\u6807\u8bb0\uff0c\u51fa\u6808\uff0cOpen\u8ba1\u6570\u51cf1<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 #\u5206\u652f\u7ed3\u6784<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 (?:(?!<\/?divb).)*\u00a0\u00a0\u00a0\u00a0\u00a0 #\u53f3\u4fa7\u4e0d\u4e3a\u5f00\u59cb\u6216\u7ed3\u675f\u6807\u8bb0\u7684\u4efb\u610f\u5b57\u7b26<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 )*\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 #\u4ee5\u4e0a\u5b50\u4e32\u51fa\u73b00\u6b21\u6216\u4efb\u610f\u591a\u6b21<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 (?(Open)(?!))\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 #\u5224\u65ad\u662f\u5426\u8fd8\u6709’OPEN’\uff0c\u6709\u5219\u8bf4\u660e\u4e0d\u914d\u5bf9\uff0c\u4ec0\u4e48\u90fd\u4e0d\u5339\u914d<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/div>\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0#\u7ed3\u675f\u6807\u8bb0\u201c<\/div>\u201d<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 “);<\/p>\n

\u201c(?:(?!<\/?divb).)*\u201d\u8fd9\u91cc\u4f7f\u7528\u7684\u5c31\u662f\u7ed3\u5408\u73af\u89c6\u7684\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u867d\u7136\u6bcf\u5339\u4e00\u4e2a\u5b57\u7b26\u90fd\u8981\u505a\u5f88\u591a\u5224\u65ad\uff0c\u4f46\u8fd9\u79cd\u5224\u65ad\u662f\u57fa\u4e8e\u5b57\u7b26\u7684\uff0c\u901f \u5ea6\u5f88\u5feb\uff0c\u800c\u5982\u679c\u8fd9\u91cc\u4f7f\u7528\u975e\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u90a3\u4e48\u6bcf\u6b21\u8981\u505a\u7684\u5c31\u662f\u5206\u652f\u7ed3\u6784\u201c|\u201d\u7684\u5224\u65ad\u4e86\uff0c\u800c\u5206\u652f\u7ed3\u6784\u662f\u975e\u5e38\u5f71\u54cd\u5339\u914d\u6548\u7387\u7684\uff0c\u5176\u4ee3\u4ef7\u8fdc\u8fdc\u9ad8\u4e8e\u5bf9\u786e\u5b9a\u5b57\u7b26\u7684\u5224\u65ad\u3002\u800c\u53e6 \u5916\u4e00\u4e2a\u539f\u56e0\uff0c\u5c31\u662f\u8d2a\u5a6a\u6a21\u5f0f\u53ef\u4ee5\u7ed3\u5408\u56fa\u5316\u5206\u7ec4\u6765\u63d0\u5347\u6548\u7387\uff0c\u800c\u5bf9\u975e\u8d2a\u5a6a\u6a21\u5f0f\u4f7f\u7528\u56fa\u5316\u5206\u7ec4\u5374\u662f\u6ca1\u6709\u610f\u4e49\u7684\u3002<\/p>\n

<\/a>4\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u2014\u2014\u6700\u540e\u7684\u56de\u987e<\/h1>\n

<\/a>4.1\u00a0\u00a0\u00a0\u00a0 \u4e00\u4e2a\u4f8b\u5b50\u7684\u5339\u914d\u539f\u7406\u56de\u987e<\/h2>\n

\u518d\u56de\u8fc7\u5934\u6765\u770b\u4e00\u4e0b2.1.1\u8282\u4f8b\u5b50\u4e2d\u6b63\u5219\uff0c\u524d\u9762\u4ece\u5e94\u7528\u89d2\u5ea6\u8fdb\u884c\u4e86\u5206\u6790\uff0c\u4f46\u8ba8\u8bba\u8fc7\u5339\u914d\u539f\u7406\u540e\u4f1a\u53d1\u73b0\uff0c\u5339\u914d\u8fc7\u7a0b\u5e76\u4e0d\u662f\u90a3\u4e48\u7b80\u5355\u7684\uff0c\u4e0b\u9762\u4ece\u5339\u914d\u539f\u7406\u89d2\u5ea6\u5206\u6790\u7684\u5339\u914d\u8fc7\u7a0b\u3002<\/p>\n

\"4-1\"<\/p>\n

\n

\u56fe4-1<\/p>\n

\u9996\u5148\u7531\u201c<<\/strong>\u201d\u53d6\u5f97\u63a7\u5236\u6743\uff0c\u7531\u4f4d\u7f6e0\u4f4d\u5f00\u59cb\u5c1d\u8bd5\u5339\u914d\uff0c\u5339\u914d\u5b57\u7b26\u201ca<\/strong>\u201d\uff0c\u5339\u914d\u5931\u8d25\uff0c\u7b2c\u4e00\u8f6e\u5339\u914d\u7ed3\u675f\u3002\u7b2c\u4e8c\u8f6e\u5339\u914d\u4ece\u4f4d\u7f6e1\u5f00\u59cb\u5c1d\u8bd5\u5339\u914d\uff0c\u540c\u6837\u5339\u914d\u5931\u8d25\u3002\u7b2c\u4e09\u8f6e\u4ece\u4f4d\u7f6e3\u5f00\u59cb\u5c1d\u8bd5\u5339\u914d\uff0c\u5339\u914d\u5b57\u7b26\u201c<<\/strong>\u201d\uff0c\u5339\u914d\u6210\u529f\uff0c\u63a7\u5236\u6743\u4ea4\u7ed9\u201cd<\/strong>\u201d\u3002<\/p>\n

\u201cd<\/strong>\u201d\u5c1d\u8bd5\u5339\u914d\u5b57\u7b26\u201cd<\/strong>\u201d\uff0c\u5339\u914d\u6210\u529f\uff0c\u63a7\u5236\u6743\u4ea4\u7ed9\u201ci<\/strong>\u201d\u3002\u91cd\u590d\u4ee5\u4e0a\u8fc7\u7a0b\uff0c\u76f4\u5230\u7531\u201c><\/strong>\u201d\u5339\u914d\u5230\u5b57\u7b26\u201c><\/strong>\u201d\uff0c\u63a7\u5236\u6743\u4ea4\u7ed9\u201c.*<\/strong>\u201d\u3002<\/p>\n

\u201c.*<\/strong>\u201d\u5c5e\u4e8e\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u5c06\u4eceB<\/strong>\u5904\u540e\u7684\u5b57\u7b26\u201ct<\/strong>\u201d\u5f00\u59cb\uff0c\u4e00\u76f4\u5339\u914d\u5230E<\/strong>\u5904\uff0c\u4e5f\u5c31\u662f\u5b57\u7b26\u4e32\u7ed3\u675f\u4f4d\u7f6e\uff0c\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u201c<<\/strong>\u201d\u3002<\/p>\n

\u201c<<\/strong>\u201d\u4ece\u5b57\u7b26\u4e32\u7ed3\u675f\u4f4d\u7f6e\u5c1d\u8bd5\u5339\u914d\uff0c\u5339\u914d\u5931\u8d25\uff0c\u5411\u524d\u67e5\u627e\u53ef\u4f9b\u56de\u6eaf\u7684\u72b6\u6001\uff0c\u628a\u63a7\u5236\u6743\u4ea4\u7ed9\u201c.*<\/strong>\u201d\uff0c\u7531\u201c.*<\/strong>\u201d\u8ba9\u51fa\u4e00\u4e2a\u5b57\u7b26\u201cc<\/strong>\u201d\uff0c\u628a\u63a7\u5236\u6743\u518d\u4ea4\u7ed9\u201c<<\/strong>\u201d\uff0c\u5c1d\u8bd5\u5339\u914d\uff0c\u5339\u914d\u5931\u8d25\uff0c\u5411\u524d\u67e5\u627e\u53ef\u4f9b\u56de\u6eaf\u7684\u72b6\u6001\u3002\u4e00\u76f4\u91cd\u590d\u4ee5\u4e0a\u8fc7\u7a0b\uff0c\u76f4\u5230\u201c.*<\/strong>\u201d\u8ba9\u51fa\u5df2\u5339\u914d\u7684\u5b57\u7b26\u201c<<\/strong>\u201d\uff0c\u5b9e\u9645\u4e0a\u4e5f\u5c31\u662f\u8ba9\u51fa\u4e86\u5df2\u5339\u914d\u7684\u5b50\u4e32\u201c<\/div>cc<\/strong>\u201d\u4e3a\u6b62\uff0c\u201c<<\/strong>\u201d\u624d\u5339\u914d\u5b57\u7b26\u201c<<\/strong>\u201d\u6210\u529f\uff0c\u63a7\u5236\u6743\u4ea4\u7ed9\u201c\/<\/strong>\u201d\u3002<\/p>\n

\u63a5\u4e0b\u6765\u7531\u201c\/<\/strong>\u201d\u3001\u201cd<\/strong>\u201d\u3001\u201ci<\/strong>\u201d\u3001\u201cv<\/strong>\u201d\u5206\u522b\u5339\u914d\u5bf9\u5e94\u7684\u5b57\u7b26\u6210\u529f\uff0c\u6b64\u65f6\u6574\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\u5b8c\u6bd5\u3002<\/p>\n

<\/a>4.2\u00a0\u00a0\u00a0\u00a0 \u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u2014\u2014\u91cf\u8bcd\u7684\u7ec6\u8282<\/h2>\n

<\/a>4.2.1\u00a0 \u533a\u95f4\u91cf\u8bcd\u7684\u975e\u8d2a\u5a6a\u6a21\u5f0f<\/h3>\n

\u524d\u9762\u63d0\u5230\u7684\u975e\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u4e00\u76f4\u90fd\u662f\u4f7f\u7528\u7684\u201c*?<\/strong>\u201d\uff0c\u800c\u6ca1\u6709\u6d89\u53ca\u5230\u5176\u5b83\u7684\u533a\u95f4\u91cf\u8bcd\uff0c\u5bf9\u4e8e\u201c*?<\/strong>\u201d\u548c\u201c+?<\/strong>\u201d\u8fd9\u6837\u7684\u975e\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u5927\u591a\u6570\u63a5\u89e6\u8fc7\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u4eba\u90fd\u53ef\u4ee5\u7406\u89e3\uff0c\u4f46\u662f\u5bf9\u4e8e\u533a\u95f4\u91cf\u8bcd\u7684\u975e\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u6bd4\u5982\u201c{m,n}?<\/strong>\u201d\uff0c\u8981\u4e48\u662f\u6ca1\u89c1\u8fc7\uff0c\u8981\u4e48\u662f\u4e0d\u7406\u89e3\uff0c\u4e3b\u8981\u662f\u8fd9\u79cd\u5e94\u7528\u573a\u666f\u975e\u5e38\u5c11\uff0c\u6240\u4ee5\u88ab\u5ffd\u7565\u4e86\u3002<\/p>\n

\u9996\u5148\u9700\u8981\u660e\u786e\u7684\u4e00\u70b9\uff0c\u5c31\u662f\u91cf\u8bcd\u201c{m,n}<\/strong>\u201d\u662f\u5339\u914d\u4f18\u5148\u91cf\u8bcd\uff0c\u867d\u7136\u5b83\u6709\u4e86\u4e0a\u9650\uff0c\u4f46\u662f\u5728\u8fbe\u5230\u4e0a\u9650\u4e4b\u524d\uff0c\u80fd\u591f\u5339\u914d\uff0c\u8fd8\u662f\u8981\u5c3d\u53ef\u80fd\u591a\u7684\u5339\u914d\u7684\u3002\u800c\u201c{m,n}?<\/strong>\u201d\u5c31\u662f\u5bf9\u5e94\u7684\u5ffd\u7565\u4f18\u5148\u91cf\u8bcd\u4e86\uff0c\u5728\u53ef\u5339\u914d\u53ef\u4e0d\u5339\u914d\u7684\u60c5\u51b5\u4e0b\uff0c\u5c3d\u53ef\u80fd\u5c11\u7684\u5339\u914d\u3002<\/p>\n

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\u4e3e\u4f8b<\/strong>\uff08\u53c2\u8003 \u9650\u5236\u5b57\u7b26\u957f\u5ea6\u4e0e\u6700\u5c0f\u5339\u914d<\/a>\uff09\uff1a<\/p>\n

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\u6b63\u5219\u8868\u8fbe\u5f0f\uff1acsdn.{1,100}?abc<\/strong><\/p>\n

\u6216\u8bb8\u5bf9\u8fd9\u4e2a\u4f8b\u5b50\u8fd8\u6709\u4eba\u4e0d\u662f\u5f88\u7406\u89e3\uff0c\u4f46\u662f\u60f3\u60f3\uff0c\u5176\u5b9e\u201c*<\/strong>\u201d\u5c31\u7b49\u4ef7\u4e8e\u201c{0,}<\/strong>\u201d\uff0c\u201c+<\/strong>\u201d\u5c31\u7b49\u4ef7\u4e8e\u201c{1,}<\/strong>\u201d\uff0c\u201c*?<\/strong>\u201d\u4e5f\u5c31\u662f\u201c{0,}?<\/strong>\u201d\uff0c\u62bd\u8c61\u51fa\u6765\u4e5f\u5c31\u662f\u201c{m,}?<\/strong>\u201d\uff0c\u5373\u4e0a\u9650\u4e3a\u65e0\u7a77\u5927\u3002\u5982\u679c\u4e0a\u9650\u4e3a\u4e00\u4e2a\u56fa\u5b9a\u503c\uff0c\u90a3\u5c31\u662f\u201c{m,n}?<\/strong>\u201d\uff0c\u8fd9\u6837\u5e94\u8be5\u4e5f\u5c31\u53ef\u4ee5\u7406\u89e3\u4e86\u3002<\/p>\n

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<\/a>4.2.2\u00a0 \u5ffd\u7565\u4f18\u5148\u91cf\u8bcd\u7684\u5339\u914d\u4e0b\u9650<\/h3>\n

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\u201c??<\/strong>\u201d\u4e5f\u662f\u5ffd\u7565\u4f18\u5148\u91cf\u8bcd\uff0c\u88ab\u4fee\u9970\u7684\u5b50\u8868\u8fbe\u5f0f\u4f7f\u7528\u7684\u4e5f\u662f\u975e\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u201c??<\/strong>\u201d\u4fee\u9970\u7684\u5b50\u8868\u8fbe\u5f0f\uff0c\u6700\u5c11\u5339\u914d0\u6b21\uff0c\u6700\u591a\u5339\u914d1\u6b21\u3002\u5728\u5339\u914d\u8fc7\u7a0b\u4e2d\uff0c\u9075\u5faa\u975e\u8d2a\u5a6a\u6a21\u5f0f\u5339\u914d\u539f\u5219\uff0c\u5148\u4e0d\u5339\u914d\uff0c\u5373\u5339\u914d0\u6b21\uff0c\u8bb0\u5f55\u56de\u6eaf\u72b6\u6001\uff0c\u53ea\u6709\u4e0d\u5f97\u4e0d\u5339\u914d\u65f6\uff0c\u624d\u53bb\u5c1d\u8bd5\u5339\u914d\u3002<\/p>\n

\u201c*?<\/strong>\u201d\u4fee\u9970\u7684\u5b50\u8868\u8fbe\u5f0f\uff0c\u6700\u5c11\u5339\u914d0\u6b21\uff0c\u6700\u591a\u5339\u914d\u65e0\u7a77\u591a\u6b21\uff1b\u201c+?<\/strong>\u201d\u4fee\u9970\u7684\u5b50\u8868\u8fbe\u5f0f\uff0c\u6700\u5c11\u5339\u914d1\u6b21\uff0c\u6700\u591a\u5339\u914d\u65e0\u7a77\u591a\u6b21\uff0c\u201c+?<\/strong>\u201d\u867d\u7136\u4f7f\u7528\u7684\u662f\u975e\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u5728\u5339\u914d\u8fc7\u7a0b\u4e2d\uff0c\u9996\u5148\u8981\u5339\u914d\u4e00\u4e2a\u5b57\u7b26\uff0c\u4e4b\u540e\u624d\u662f\u5ffd\u7565\u5339\u914d\u7684\uff0c\u8fd9\u4e00\u70b9\u4e5f\u9700\u8981\u6ce8\u610f\u3002<\/p>\n

<\/a>4.3\u00a0\u00a0\u00a0\u00a0 \u8d2a\u5a6a\u4e0e\u975e\u8d2a\u5a6a\u6a21\u5f0f\u5c0f\u7ed3<\/h2>\n

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\u6240\u6709\u7684\u975e\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u90fd\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539\u91cf\u8bcd\u4fee\u9970\u7684\u5b50\u8868\u8fbe\u5f0f\uff0c\u8f6c\u6362\u4e3a\u8d2a\u5a6a\u6a21\u5f0f\u3002<\/p>\n

\u8d2a\u5a6a\u6a21\u5f0f\u53ef\u4ee5\u4e0e\u56fa\u5316\u5206\u7ec4\u7ed3\u5408\uff0c\u63d0\u5347\u5339\u914d\u6548\u7387\uff0c\u800c\u975e\u8d2a\u5a6a\u6a21\u5f0f\u5374\u4e0d\u53ef\u4ee5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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