{"id":15396,"date":"2023-12-04T18:57:34","date_gmt":"2023-12-04T10:57:34","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=15396"},"modified":"2023-12-04T19:54:01","modified_gmt":"2023-12-04T11:54:01","slug":"tian-peng-heng-yu-mian-shi","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/tian-peng-heng-yu-mian-shi\/","title":{"rendered":"\u5929\u9e4f\u6052\u5b87\u9762\u8bd5"},"content":{"rendered":"<h1><a id=\"%E5%A4%A9%E9%B9%8F%E6%81%92%E5%AE%87%E9%9D%A2%E8%AF%95\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u5929\u9e4f\u6052\u5b87\u9762\u8bd5<\/h1>\n<h2><a id=\"%E5%BF%AB%E9%80%9F%E6%8E%92%E5%BA%8F%E5%92%8C%E5%86%92%E6%B3%A1%E6%8E%92%E5%BA%8F%E7%9A%84%E6%97%B6%E9%97%B4%E5%A4%8D%E6%9D%82%E5%BA%A6\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u5feb\u901f\u6392\u5e8f\u548c\u5192\u6ce1\u6392\u5e8f\u7684\u65f6\u95f4\u590d\u6742\u5ea6<\/h2>\n<h3><a id=\"%E5%86%92%E6%B3%A1%E6%8E%92%E5%BA%8F%EF%BC%88bubble-sort%EF%BC%89%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u5192\u6ce1\u6392\u5e8f\uff08Bubble Sort\uff09\uff1a<\/h3>\n<ul>\n<li><strong>\u6700\u574f\u65f6\u95f4\u590d\u6742\u5ea6\uff1a<\/strong> O(n^2) &#8211; \u5728\u6570\u7ec4\u5b8c\u5168\u9006\u5e8f\u7684\u60c5\u51b5\u4e0b\uff0c\u6bcf\u6b21\u6bd4\u8f83\u548c\u4ea4\u6362\u90fd\u4f1a\u53d1\u751f\u3002<\/li>\n<li><strong>\u5e73\u5747\u65f6\u95f4\u590d\u6742\u5ea6\uff1a<\/strong> O(n^2) &#8211; \u5bf9\u4e8e\u4efb\u4f55\u60c5\u51b5\uff0c\u5e73\u5747\u65f6\u95f4\u590d\u6742\u5ea6\u90fd\u662f O(n^2)\u3002<\/li>\n<li><strong>\u6700\u597d\u65f6\u95f4\u590d\u6742\u5ea6\uff1a<\/strong> O(n) &#8211; \u5f53\u6570\u7ec4\u5df2\u7ecf\u6709\u5e8f\u65f6\uff0c\u53ea\u9700\u8981\u8fdb\u884c\u4e00\u6b21\u904d\u5386\u3002<\/li>\n<\/ul>\n<h3><a id=\"%E5%BF%AB%E9%80%9F%E6%8E%92%E5%BA%8F%EF%BC%88quick-sort%EF%BC%89%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u5feb\u901f\u6392\u5e8f\uff08Quick Sort\uff09\uff1a<\/h3>\n<ul>\n<li><strong>\u6700\u574f\u65f6\u95f4\u590d\u6742\u5ea6\uff1a<\/strong> O(n^2) &#8211; \u5f53\u6bcf\u6b21\u9009\u62e9\u7684\u57fa\u51c6\u5143\u7d20\u90fd\u662f\u5f53\u524d\u5b50\u6570\u7ec4\u4e2d\u7684\u6700\u5927\u6216\u6700\u5c0f\u5143\u7d20\u65f6\u3002<\/li>\n<li><strong>\u5e73\u5747\u65f6\u95f4\u590d\u6742\u5ea6\uff1a<\/strong> O(n log n) &#8211; \u5728\u5e73\u5747\u60c5\u51b5\u4e0b\uff0c\u5feb\u901f\u6392\u5e8f\u7684\u6027\u80fd\u8f83\u597d\u3002<\/li>\n<li><strong>\u6700\u597d\u65f6\u95f4\u590d\u6742\u5ea6\uff1a<\/strong> O(n log n) &#8211; \u5f53\u6bcf\u6b21\u9009\u62e9\u7684\u57fa\u51c6\u5143\u7d20\u90fd\u80fd\u5e73\u5747\u5730\u5c06\u6570\u7ec4\u5206\u6210\u4e24\u534a\u65f6\u3002<\/li>\n<\/ul>\n<h2><a id=\"%E5%BF%AB%E9%80%9F%E6%8E%92%E5%BA%8F%E5%92%8C%E5%86%92%E6%B3%A1%E6%8E%92%E5%BA%8F%E7%9A%84%E4%BC%98%E7%BC%BA%E7%82%B9\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u5feb\u901f\u6392\u5e8f\u548c\u5192\u6ce1\u6392\u5e8f\u7684\u4f18\u7f3a\u70b9<\/h2>\n<ol>\n<li><strong>\u7b97\u6cd5\u601d\u60f3\uff1a<\/strong>\n<ul>\n<li>\u5192\u6ce1\u6392\u5e8f\uff1a\u901a\u8fc7\u91cd\u590d\u904d\u5386\u5f85\u6392\u5e8f\u7684\u5143\u7d20\uff0c\u6bd4\u8f83\u76f8\u90bb\u5143\u7d20\uff0c\u5e76\u5728\u4e0d\u7b26\u5408\u987a\u5e8f\u7684\u60c5\u51b5\u4e0b\u4ea4\u6362\u5b83\u4eec\uff0c\u76f4\u5230\u6574\u4e2a\u6570\u7ec4\u6709\u5e8f\u3002<\/li>\n<li>\u5feb\u901f\u6392\u5e8f\uff1a\u4f7f\u7528\u5206\u6cbb\u6cd5\u7684\u601d\u60f3\uff0c\u9009\u62e9\u4e00\u4e2a\u57fa\u51c6\u5143\u7d20\uff0c\u5c06\u6570\u7ec4\u5206\u4e3a\u4e24\u4e2a\u5b50\u6570\u7ec4\uff0c\u4f7f\u5f97\u5de6\u8fb9\u7684\u5143\u7d20\u90fd\u5c0f\u4e8e\u57fa\u51c6\uff0c\u53f3\u8fb9\u7684\u5143\u7d20\u90fd\u5927\u4e8e\u57fa\u51c6\uff0c\u7136\u540e\u9012\u5f52\u5730\u5bf9\u5b50\u6570\u7ec4\u8fdb\u884c\u6392\u5e8f\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u6027\u80fd\uff1a<\/strong>\n<ul>\n<li>\u5192\u6ce1\u6392\u5e8f\u7684\u5e73\u5747\u548c\u6700\u574f\u65f6\u95f4\u590d\u6742\u5ea6\u90fd\u662fO(n^2)\uff0c\u56e0\u6b64\u4e0d\u9002\u7528\u4e8e\u5927\u89c4\u6a21\u6570\u636e\u7684\u6392\u5e8f\u3002<\/li>\n<li>\u5feb\u901f\u6392\u5e8f\u7684\u5e73\u5747\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(n log n)\uff0c\u5728\u5b9e\u8df5\u4e2d\u901a\u5e38\u6bd4\u5192\u6ce1\u6392\u5e8f\u66f4\u5feb\u3002\u4f46\u6700\u574f\u60c5\u51b5\u4e0b\u53ef\u80fd\u8fbe\u5230O(n^2)\uff0c\u53d6\u51b3\u4e8e\u9009\u62e9\u7684\u57fa\u51c6\u5143\u7d20\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u7a33\u5b9a\u6027\uff1a<\/strong>\n<ul>\n<li>\u5192\u6ce1\u6392\u5e8f\u662f\u7a33\u5b9a\u7684\uff0c\u76f8\u7b49\u5143\u7d20\u7684\u76f8\u5bf9\u4f4d\u7f6e\u4e0d\u4f1a\u6539\u53d8\u3002<\/li>\n<li>\u5feb\u901f\u6392\u5e8f\u5728\u4e00\u822c\u60c5\u51b5\u4e0b\u662f\u4e0d\u7a33\u5b9a\u7684\uff0c\u56e0\u4e3a\u5728\u4ea4\u6362\u8fc7\u7a0b\u4e2d\u76f8\u7b49\u5143\u7d20\u7684\u76f8\u5bf9\u4f4d\u7f6e\u53ef\u80fd\u4f1a\u6539\u53d8\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u7a7a\u95f4\u590d\u6742\u5ea6\uff1a<\/strong>\n<ul>\n<li>\u5192\u6ce1\u6392\u5e8f\u662f\u539f\u5730\u6392\u5e8f\u7b97\u6cd5\uff0c\u53ea\u9700\u8981\u5e38\u6570\u7ea7\u522b\u7684\u989d\u5916\u7a7a\u95f4\u3002<\/li>\n<li>\u5feb\u901f\u6392\u5e8f\u5728\u9012\u5f52\u5b9e\u73b0\u65f6\u9700\u8981\u989d\u5916\u7684\u6808\u7a7a\u95f4\uff0c\u56e0\u6b64\u7a7a\u95f4\u590d\u6742\u5ea6\u8f83\u9ad8\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u9002\u7528\u573a\u666f\uff1a<\/strong>\n<ul>\n<li>\u5192\u6ce1\u6392\u5e8f\u9002\u7528\u4e8e\u5c0f\u578b\u6570\u636e\u96c6\uff0c\u6216\u8005\u5728\u5176\u4ed6\u6392\u5e8f\u7b97\u6cd5\u4e0d\u9002\u7528\u7684\u7279\u6b8a\u60c5\u51b5\u3002<\/li>\n<li>\u5feb\u901f\u6392\u5e8f\u9002\u7528\u4e8e\u5927\u578b\u6570\u636e\u96c6\uff0c\u662f\u5e38\u7528\u7684\u9ad8\u6548\u6392\u5e8f\u7b97\u6cd5\u4e4b\u4e00\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2><a id=\"%E4%BB%80%E4%B9%88%E6%98%AF%E9%93%BE%E8%A1%A8%EF%BC%8C%E4%BB%80%E4%B9%88%E6%98%AF%E7%BA%BF%E6%80%A7%E8%A1%A8\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u4ec0\u4e48\u662f\u94fe\u8868\uff0c\u4ec0\u4e48\u662f\u7ebf\u6027\u8868<\/h2>\n<h3><a id=\"%E7%BA%BF%E6%80%A7%E8%A1%A8%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u7ebf\u6027\u8868\uff1a<\/h3>\n<ol>\n<li><strong>\u5b9a\u4e49\uff1a<\/strong> \u7ebf\u6027\u8868\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u5176\u4e2d\u5143\u7d20\u6392\u5217\u6210\u4e00\u6761\u7ebf\uff0c\u5177\u6709\u552f\u4e00\u7684\u9996\u5143\u7d20\u548c\u552f\u4e00\u7684\u5c3e\u5143\u7d20\u3002\u7ebf\u6027\u8868\u4e2d\u7684\u5143\u7d20\u4e4b\u95f4\u5b58\u5728\u76f4\u63a5\u5173\u7cfb\uff0c\u5373\u6bcf\u4e2a\u5143\u7d20\u90fd\u6709\u4e00\u4e2a\u524d\u9a71\u5143\u7d20\u548c\u4e00\u4e2a\u540e\u7ee7\u5143\u7d20\uff0c\u9664\u4e86\u9996\u5143\u7d20\u6ca1\u6709\u524d\u9a71\uff0c\u5c3e\u5143\u7d20\u6ca1\u6709\u540e\u7ee7\u3002<\/li>\n<li><strong>\u5b9e\u73b0\uff1a<\/strong> \u7ebf\u6027\u8868\u53ef\u4ee5\u901a\u8fc7\u6570\u7ec4\u6216\u94fe\u8868\u6765\u5b9e\u73b0\u3002\u6570\u7ec4\u662f\u4e00\u5757\u8fde\u7eed\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u5143\u7d20\u7684\u5b58\u50a8\u4f4d\u7f6e\u662f\u76f8\u90bb\u7684\uff1b\u94fe\u8868\u662f\u4e00\u79cd\u975e\u8fde\u7eed\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5143\u7d20\u901a\u8fc7\u6307\u9488\u76f8\u8fde\u3002<\/li>\n<li><strong>\u5b58\u50a8\u7279\u6027\uff1a<\/strong> \u7ebf\u6027\u8868\u7684\u5143\u7d20\u5728\u5185\u5b58\u4e2d\u662f\u6309\u7ebf\u6027\u987a\u5e8f\u5b58\u50a8\u7684\uff0c\u53ef\u4ee5\u901a\u8fc7\u7d22\u5f15\uff08\u6216\u4f4d\u7f6e\uff09\u6765\u8bbf\u95ee\u5143\u7d20\u3002<\/li>\n<\/ol>\n<h3><a id=\"%E9%93%BE%E8%A1%A8%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u94fe\u8868\uff1a<\/h3>\n<ol>\n<li><strong>\u5b9a\u4e49\uff1a<\/strong> \u94fe\u8868\u662f\u4e00\u79cd\u7ebf\u6027\u8868\u7684\u5b9e\u73b0\u65b9\u5f0f\uff0c\u5176\u4e2d\u5143\u7d20\u7684\u5b58\u50a8\u4f4d\u7f6e\u4e0d\u4e00\u5b9a\u662f\u76f8\u90bb\u7684\uff0c\u800c\u662f\u901a\u8fc7\u6307\u9488\u76f8\u8fde\u7684\u3002\u6bcf\u4e2a\u5143\u7d20\u90fd\u5305\u542b\u4e00\u4e2a\u6570\u636e\u9879\u548c\u4e00\u4e2a\u6307\u5411\u4e0b\u4e00\u4e2a\u5143\u7d20\u7684\u6307\u9488\u3002<\/li>\n<li><strong>\u7ed3\u6784\uff1a<\/strong> \u94fe\u8868\u5305\u62ec\u5355\u94fe\u8868\u3001\u53cc\u94fe\u8868\u548c\u5faa\u73af\u94fe\u8868\u7b49\u3002\u5728\u5355\u94fe\u8868\u4e2d\uff0c\u6bcf\u4e2a\u8282\u70b9\u6709\u4e00\u4e2a\u6307\u5411\u4e0b\u4e00\u4e2a\u8282\u70b9\u7684\u6307\u9488\uff1b\u5728\u53cc\u94fe\u8868\u4e2d\uff0c\u6bcf\u4e2a\u8282\u70b9\u6709\u4e00\u4e2a\u6307\u5411\u524d\u4e00\u4e2a\u8282\u70b9\u548c\u4e00\u4e2a\u6307\u5411\u4e0b\u4e00\u4e2a\u8282\u70b9\u7684\u6307\u9488\uff1b\u5728\u5faa\u73af\u94fe\u8868\u4e2d\uff0c\u6700\u540e\u4e00\u4e2a\u8282\u70b9\u6307\u5411\u7b2c\u4e00\u4e2a\u8282\u70b9\uff0c\u5f62\u6210\u4e00\u4e2a\u73af\u3002<\/li>\n<li><strong>\u7075\u6d3b\u6027\uff1a<\/strong> \u7531\u4e8e\u94fe\u8868\u4e0d\u8981\u6c42\u5185\u5b58\u7a7a\u95f4\u8fde\u7eed\uff0c\u63d2\u5165\u548c\u5220\u9664\u5143\u7d20\u76f8\u5bf9\u5bb9\u6613\uff0c\u4e0d\u9700\u8981\u79fb\u52a8\u5176\u4ed6\u5143\u7d20\u3002\u8fd9\u4f7f\u5f97\u94fe\u8868\u5728\u67d0\u4e9b\u64cd\u4f5c\u4e0a\u6bd4\u6570\u7ec4\u66f4\u7075\u6d3b\u3002<\/li>\n<li><strong>\u7f3a\u70b9\uff1a<\/strong> \u4e0e\u6570\u7ec4\u76f8\u6bd4\uff0c\u94fe\u8868\u7684\u968f\u673a\u8bbf\u95ee\u901f\u5ea6\u8f83\u6162\uff0c\u56e0\u4e3a\u5fc5\u987b\u901a\u8fc7\u6307\u9488\u4e00\u4e2a\u8282\u70b9\u4e00\u4e2a\u8282\u70b9\u5730\u904d\u5386\u3002\u540c\u65f6\uff0c\u94fe\u8868\u9700\u8981\u989d\u5916\u7684\u5b58\u50a8\u7a7a\u95f4\u6765\u5b58\u50a8\u6307\u9488\u3002<\/li>\n<\/ol>\n<h2><a id=\"%E6%9F%A5%E8%AF%A2%E3%80%81%E6%8F%92%E5%85%A5%E3%80%81%E5%88%A0%E9%99%A4%E6%95%B0%E6%8D%AE%EF%BC%8C%E5%93%AA%E4%B8%AA%E8%A1%A8%E7%9A%84%E6%95%88%E7%8E%87%E9%AB%98\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u67e5\u8be2\u3001\u63d2\u5165\u3001\u5220\u9664\u6570\u636e\uff0c\u54ea\u4e2a\u8868\u7684\u6548\u7387\u9ad8<\/h2>\n<ol>\n<li><strong>\u7ebf\u6027\u8868\uff1a<\/strong>\n<ul>\n<li>\u7ebf\u6027\u8868\u662f\u4e00\u79cd\u6309\u7167\u7ebf\u6027\u987a\u5e8f\u5b58\u50a8\u6570\u636e\u7684\u6570\u636e\u7ed3\u6784\uff0c\u6570\u7ec4\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u7ebf\u6027\u8868\u5b9e\u73b0\u3002\u5728\u7ebf\u6027\u8868\u4e2d\uff0c\u5143\u7d20\u5728\u5185\u5b58\u4e2d\u662f\u76f8\u90bb\u5b58\u50a8\u7684\uff0c\u56e0\u6b64\u901a\u8fc7\u7d22\u5f15\u53ef\u4ee5\u5feb\u901f\u8bbf\u95ee\u5143\u7d20\u3002\u5bf9\u4e8e\u67e5\u8be2\u6765\u8bf4\uff0c\u7ebf\u6027\u8868\u7684\u67e5\u8be2\u64cd\u4f5c\u662fO(1)\u7684\u65f6\u95f4\u590d\u6742\u5ea6\uff0c\u5373\u5e38\u6570\u65f6\u95f4\u3002<\/li>\n<li>\u63d2\u5165\u548c\u5220\u9664\u64cd\u4f5c\u6d89\u53ca\u5230\u5143\u7d20\u7684\u79fb\u52a8\uff0c\u7279\u522b\u662f\u5728\u6570\u7ec4\u4e2d\u63d2\u5165\u6216\u5220\u9664\u5143\u7d20\u65f6\uff0c\u9700\u8981\u79fb\u52a8\u540e\u7eed\u5143\u7d20\uff0c\u5e73\u5747\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(n)\uff0c\u5176\u4e2dn\u662f\u5143\u7d20\u7684\u4e2a\u6570\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u94fe\u8868\uff1a<\/strong>\n<ul>\n<li>\u94fe\u8868\u662f\u4e00\u79cd\u975e\u8fde\u7eed\u5b58\u50a8\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5143\u7d20\u901a\u8fc7\u6307\u9488\u76f8\u4e92\u8fde\u63a5\u3002\u5728\u94fe\u8868\u4e2d\uff0c\u67e5\u8be2\u64cd\u4f5c\u76f8\u5bf9\u8f83\u6162\uff0c\u56e0\u4e3a\u9700\u8981\u4ece\u5934\u8282\u70b9\u5f00\u59cb\u9010\u4e2a\u904d\u5386\u627e\u5230\u76ee\u6807\u5143\u7d20\uff0c\u5e73\u5747\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(n)\u3002<\/li>\n<li>\u63d2\u5165\u548c\u5220\u9664\u64cd\u4f5c\u5728\u94fe\u8868\u4e2d\u6bd4\u8f83\u9ad8\u6548\uff0c\u7279\u522b\u662f\u5728\u53cc\u5411\u94fe\u8868\u4e2d\u3002\u5728\u94fe\u8868\u4e2d\u63d2\u5165\u6216\u5220\u9664\u5143\u7d20\u65f6\uff0c\u53ea\u9700\u8981\u8c03\u6574\u76f8\u90bb\u5143\u7d20\u7684\u6307\u9488\uff0c\u5e73\u5747\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(1)\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>\u7efc\u5408\u6765\u770b\uff0c\u5982\u679c\u4e3b\u8981\u64cd\u4f5c\u662f\u67e5\u8be2\uff0c\u5e76\u4e14\u6570\u636e\u89c4\u6a21\u8f83\u5927\uff0c\u7ebf\u6027\u8868\u7684\u6548\u7387\u53ef\u80fd\u66f4\u9ad8\u3002\u5982\u679c\u4e3b\u8981\u64cd\u4f5c\u662f\u63d2\u5165\u548c\u5220\u9664\uff0c\u5e76\u4e14\u9700\u8981\u9891\u7e41\u5730\u8fdb\u884c\u8fd9\u4e9b\u64cd\u4f5c\uff0c\u94fe\u8868\u53ef\u80fd\u66f4\u9002\u5408\u3002<\/p>\n<h2><a id=\"mysql%E7%9A%84%E6%97%B6%E9%97%B4%E5%87%BD%E6%95%B0%E7%9F%A5%E9%81%93%E5%93%AA%E4%BA%9B\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>MySQL\u7684\u65f6\u95f4\u51fd\u6570\u77e5\u9053\u54ea\u4e9b<\/h2>\n<ol>\n<li>\n<strong>NOW()\uff1a<\/strong><\/p>\n<ul>\n<li>\u8fd4\u56de\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4\u7684\u503c\uff0c\u5305\u62ec\u5e74\u3001\u6708\u3001\u65e5\u3001\u5c0f\u65f6\u3001\u5206\u949f\u548c\u79d2\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql\">SELECT NOW();\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>CURDATE()\uff1a<\/strong><\/p>\n<ul>\n<li>\u8fd4\u56de\u5f53\u524d\u65e5\u671f\u7684\u503c\uff0c\u4e0d\u5305\u62ec\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql\">SELECT CURDATE();\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>CURTIME()\uff1a<\/strong><\/p>\n<ul>\n<li>\u8fd4\u56de\u5f53\u524d\u65f6\u95f4\u7684\u503c\uff0c\u4e0d\u5305\u62ec\u65e5\u671f\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql\">SELECT CURTIME();\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>DATE()\uff1a<\/strong><\/p>\n<ul>\n<li>\u4ece\u65e5\u671f\u65f6\u95f4\u503c\u4e2d\u63d0\u53d6\u65e5\u671f\u90e8\u5206\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql\">SELECT DATE(NOW());\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>TIME()\uff1a<\/strong><\/p>\n<ul>\n<li>\u4ece\u65e5\u671f\u65f6\u95f4\u503c\u4e2d\u63d0\u53d6\u65f6\u95f4\u90e8\u5206\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql\">SELECT TIME(NOW());\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>YEAR()\uff1a<\/strong><\/p>\n<ul>\n<li>\u4ece\u65e5\u671f\u6216\u65e5\u671f\u65f6\u95f4\u503c\u4e2d\u63d0\u53d6\u5e74\u4efd\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql\">SELECT YEAR(NOW());\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>MONTH()\uff1a<\/strong><\/p>\n<ul>\n<li>\u4ece\u65e5\u671f\u6216\u65e5\u671f\u65f6\u95f4\u503c\u4e2d\u63d0\u53d6\u6708\u4efd\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql\">SELECT MONTH(NOW());\n\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>DAY()\uff1a<\/strong><\/p>\n<ul>\n<li>\u4ece\u65e5\u671f\u6216\u65e5\u671f\u65f6\u95f4\u503c\u4e2d\u63d0\u53d6\u65e5\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql\">SELECT DAY(NOW());\n\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>HOUR()\uff1a<\/strong><\/p>\n<ul>\n<li>\u4ece\u65f6\u95f4\u6216\u65e5\u671f\u65f6\u95f4\u503c\u4e2d\u63d0\u53d6\u5c0f\u65f6\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql\">SELECT HOUR(NOW());\n\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>MINUTE()\uff1a<\/strong><\/p>\n<ul>\n<li>\u4ece\u65f6\u95f4\u6216\u65e5\u671f\u65f6\u95f4\u503c\u4e2d\u63d0\u53d6\u5206\u949f\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql\">SELECT MINUTE(NOW());\n\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>SECOND()\uff1a<\/strong><\/p>\n<ul>\n<li>\u4ece\u65f6\u95f4\u6216\u65e5\u671f\u65f6\u95f4\u503c\u4e2d\u63d0\u53d6\u79d2\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql\">SELECT SECOND(NOW());\n\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>DATEDIFF()\uff1a<\/strong><\/p>\n<ul>\n<li>\u8fd4\u56de\u4e24\u4e2a\u65e5\u671f\u4e4b\u95f4\u7684\u5929\u6570\u5dee\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql\">SELECT DATEDIFF('2023-01-01', '2022-01-01');\n\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>DATE_ADD()\uff1a<\/strong><\/p>\n<ul>\n<li>\u5728\u65e5\u671f\u6216\u65e5\u671f\u65f6\u95f4\u4e0a\u6dfb\u52a0\u4e00\u4e2a\u65f6\u95f4\u95f4\u9694\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql\">SELECT DATE_ADD(NOW(), INTERVAL 1 DAY);\n\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>DATE_SUB()\uff1a<\/strong><\/p>\n<ul>\n<li>\u4ece\u65e5\u671f\u6216\u65e5\u671f\u65f6\u95f4\u4e2d\u51cf\u53bb\u4e00\u4e2a\u65f6\u95f4\u95f4\u9694\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql\">SELECT DATE_SUB(NOW(), INTERVAL 1 WEEK);\n<\/code><\/pre>\n<\/li>\n<\/ol>\n<h2><a id=\"mysql%E7%9A%84%E5%AD%98%E5%82%A8%E8%BF%87%E7%A8%8B\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>MySQL\u7684\u5b58\u50a8\u8fc7\u7a0b<\/h2>\n<p>MySQL \u5b58\u50a8\u8fc7\u7a0b\u662f\u4e00\u7ec4\u9884\u5148\u7f16\u8bd1\u7684 SQL \u8bed\u53e5\uff0c\u53ef\u4ee5\u5728 MySQL \u6570\u636e\u5e93\u4e2d\u4fdd\u5b58\u548c\u91cd\u590d\u4f7f\u7528\u3002\u5b58\u50a8\u8fc7\u7a0b\u53ef\u4ee5\u5305\u542b SQL \u8bed\u53e5\u3001\u63a7\u5236\u7ed3\u6784\uff08\u4f8b\u5982\u6761\u4ef6\u548c\u5faa\u73af\uff09\u3001\u53d8\u91cf\u3001\u53c2\u6570\u548c\u9519\u8bef\u5904\u7406\u7b49\u5143\u7d20\u3002\u901a\u8fc7\u4f7f\u7528\u5b58\u50a8\u8fc7\u7a0b\uff0c\u53ef\u4ee5\u5c06\u590d\u6742\u7684\u4e1a\u52a1\u903b\u8f91\u5c01\u88c5\u5728\u6570\u636e\u5e93\u4e2d\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u548c\u6267\u884c\u6548\u7387\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f MySQL \u5b58\u50a8\u8fc7\u7a0b\u7684\u57fa\u672c\u7ed3\u6784\uff1a<\/p>\n<pre><code class=\"language-sql\">DELIMITER \/\/\n\nCREATE PROCEDURE procedure_name (parameter_list)\nBEGIN\n    -- SQL statements\nEND \/\/\n\nDELIMITER ;\n<\/code><\/pre>\n<ul>\n<li><code>DELIMITER<\/code> \u7528\u4e8e\u66f4\u6539 SQL \u8bed\u53e5\u7684\u7ed3\u675f\u6807\u5fd7\uff0c\u4ee5\u4fbf\u5728\u5b58\u50a8\u8fc7\u7a0b\u4e2d\u4f7f\u7528\u5206\u53f7 (<code>;<\/code>)\u3002\u5728\u5b9a\u4e49\u5b58\u50a8\u8fc7\u7a0b\u65f6\uff0c\u9700\u8981\u7528 <code>\/\/<\/code> \u4f5c\u4e3a\u7ed3\u675f\u6807\u5fd7\uff0c\u800c\u5728\u5b58\u50a8\u8fc7\u7a0b\u5185\u90e8\u7684 SQL \u8bed\u53e5\u7ed3\u675f\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u666e\u901a\u7684\u5206\u53f7\u3002<\/li>\n<li><code>CREATE PROCEDURE<\/code> \u7528\u4e8e\u521b\u5efa\u5b58\u50a8\u8fc7\u7a0b\u3002<\/li>\n<li><code>procedure_name<\/code> \u662f\u5b58\u50a8\u8fc7\u7a0b\u7684\u540d\u79f0\u3002<\/li>\n<li><code>parameter_list<\/code> \u662f\u5b58\u50a8\u8fc7\u7a0b\u7684\u53c2\u6570\u5217\u8868\uff0c\u5305\u62ec\u53c2\u6570\u7684\u540d\u79f0\u548c\u6570\u636e\u7c7b\u578b\u3002<\/li>\n<li><code>BEGIN...END<\/code> \u4e4b\u95f4\u662f\u5b58\u50a8\u8fc7\u7a0b\u7684\u4e3b\u4f53\uff0c\u5305\u542b\u4e86\u4e00\u7cfb\u5217 SQL \u8bed\u53e5\u548c\u63a7\u5236\u7ed3\u6784\u3002<\/li>\n<li><code>\/\/<\/code> \u7528\u4e8e\u7ed3\u675f\u5b58\u50a8\u8fc7\u7a0b\u7684\u5b9a\u4e49\u3002<\/li>\n<li><code>DELIMITER ;<\/code> \u7528\u4e8e\u6062\u590d SQL \u8bed\u53e5\u7684\u7ed3\u675f\u6807\u5fd7\u4e3a\u5206\u53f7\u3002<\/li>\n<\/ul>\n<h2><a id=\"%E7%99%BE%E4%B8%87%E9%87%8F%E7%BA%A7%E7%9A%84%E6%95%B0%E6%8D%AE%E9%9C%80%E8%A6%81%E8%BF%9B%E8%A1%8C%E8%BF%9E%E8%A1%A8%E6%9F%A5%E8%AF%A2%EF%BC%8C%E5%8F%AF%E8%83%BD%E5%87%BA%E7%8E%B0%E6%95%B0%E6%8D%AE%E6%96%AD%E5%B1%82%EF%BC%8C%E5%A6%82%E4%BD%95%E8%A7%A3%E5%86%B3%EF%BC%8C%E8%AE%A9%E6%95%B0%E6%8D%AE%E9%87%8F%E5%8F%98%E5%B0%8F\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u767e\u4e07\u91cf\u7ea7\u7684\u6570\u636e\u9700\u8981\u8fdb\u884c\u8fde\u8868\u67e5\u8be2\uff0c\u53ef\u80fd\u51fa\u73b0\u6570\u636e\u65ad\u5c42\uff0c\u5982\u4f55\u89e3\u51b3\uff0c\u8ba9\u6570\u636e\u91cf\u53d8\u5c0f<\/h2>\n<ol>\n<li><strong>\u4f7f\u7528\u7d22\u5f15\uff1a<\/strong>\n<ul>\n<li>\u786e\u4fdd\u53c2\u4e0e\u8054\u8868\u67e5\u8be2\u7684\u5217\u90fd\u6709\u7d22\u5f15\uff0c\u8fd9\u6709\u52a9\u4e8e\u52a0\u901f\u67e5\u8be2\u8fc7\u7a0b\u3002\u5728 MySQL \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>CREATE INDEX<\/code> \u8bed\u53e5\u521b\u5efa\u7d22\u5f15\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u5206\u9875\u67e5\u8be2\uff1a<\/strong>\n<ul>\n<li>\u5c06\u5927\u67e5\u8be2\u62c6\u5206\u6210\u591a\u4e2a\u5c0f\u67e5\u8be2\uff0c\u6bcf\u6b21\u53ea\u67e5\u8be2\u4e00\u90e8\u5206\u6570\u636e\uff0c\u8fd9\u53ef\u4ee5\u901a\u8fc7\u5206\u9875\u6765\u5b9e\u73b0\u3002\u5728\u5f88\u591a\u60c5\u51b5\u4e0b\uff0c\u7528\u6237\u4e0d\u9700\u8981\u4e00\u6b21\u6027\u770b\u5230\u5168\u90e8\u7684\u6570\u636e\uff0c\u5206\u9875\u67e5\u8be2\u53ef\u4ee5\u63d0\u4f9b\u66f4\u597d\u7684\u7528\u6237\u4f53\u9a8c\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u4f7f\u7528\u5408\u9002\u7684\u5b57\u6bb5\uff1a<\/strong>\n<ul>\n<li>\u53ea\u67e5\u8be2\u9700\u8981\u7684\u5b57\u6bb5\uff0c\u800c\u4e0d\u662f\u9009\u62e9\u5168\u90e8\u5b57\u6bb5\u3002\u8fd9\u53ef\u4ee5\u51cf\u5c0f\u4f20\u8f93\u7684\u6570\u636e\u91cf\uff0c\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002<\/li>\n<li>(<strong>\u53ea\u8ba4\u53ef\u4e86\u8fd9\u4e2a<\/strong>)<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u4f7f\u7528\u5408\u9002\u7684\u6570\u636e\u7c7b\u578b\uff1a<\/strong>\n<ul>\n<li>\u4f7f\u7528\u8f83\u5c0f\u7684\u6570\u636e\u7c7b\u578b\u6765\u5b58\u50a8\u6570\u636e\uff0c\u4ee5\u51cf\u5c0f\u5b58\u50a8\u7a7a\u95f4\u548c\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u7f13\u5b58\u67e5\u8be2\u7ed3\u679c\uff1a<\/strong>\n<ul>\n<li>\u5982\u679c\u67e5\u8be2\u7684\u6570\u636e\u4e0d\u7ecf\u5e38\u53d8\u5316\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u7f13\u5b58\u6280\u672f\uff0c\u5c06\u67e5\u8be2\u7ed3\u679c\u7f13\u5b58\u8d77\u6765\uff0c\u907f\u514d\u6bcf\u6b21\u90fd\u6267\u884c\u67e5\u8be2\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u5206\u5e93\u5206\u8868\uff1a<\/strong>\n<ul>\n<li>\u8003\u8651\u5c06\u6570\u636e\u6309\u7167\u67d0\u79cd\u89c4\u5219\u5206\u6563\u5230\u591a\u4e2a\u6570\u636e\u5e93\u6216\u8005\u591a\u4e2a\u8868\u4e2d\uff0c\u4ee5\u51cf\u5c0f\u5355\u4e2a\u67e5\u8be2\u7684\u6570\u636e\u91cf\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u4f7f\u7528\u6570\u636e\u5e93\u4f18\u5316\u5de5\u5177\uff1a<\/strong>\n<ul>\n<li>\u4f7f\u7528\u6570\u636e\u5e93\u7684\u6027\u80fd\u5206\u6790\u5de5\u5177\uff0c\u5982MySQL\u7684<code>EXPLAIN<\/code>\u8bed\u53e5\uff0c\u6765\u5206\u6790\u67e5\u8be2\u8bed\u53e5\u7684\u6267\u884c\u8ba1\u5212\uff0c\u4ee5\u4fbf\u4f18\u5316\u67e5\u8be2\u6027\u80fd\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u6570\u636e\u538b\u7f29\uff1a<\/strong>\n<ul>\n<li>\u5bf9\u4e8e\u9700\u8981\u4f20\u8f93\u7684\u5927\u91cf\u6570\u636e\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u6570\u636e\u538b\u7f29\u6280\u672f\uff0c\u51cf\u5c0f\u4f20\u8f93\u7684\u6570\u636e\u91cf\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u4f7f\u7528\u5408\u9002\u7684\u8fde\u63a5\u65b9\u5f0f\uff1a<\/strong>\n<ul>\n<li>\u6839\u636e\u67e5\u8be2\u7684\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u8fde\u63a5\u65b9\u5f0f\uff0c\u5982 INNER JOIN\u3001LEFT JOIN \u7b49\u3002\u4e0d\u540c\u7684\u8fde\u63a5\u65b9\u5f0f\u5bf9\u6027\u80fd\u6709\u4e0d\u540c\u7684\u5f71\u54cd\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u6570\u636e\u5e93\u670d\u52a1\u5668\u4f18\u5316\uff1a<\/strong>\n<ul>\n<li>\u786e\u4fdd\u6570\u636e\u5e93\u670d\u52a1\u5668\u7684\u786c\u4ef6\u548c\u914d\u7f6e\u8db3\u591f\u652f\u6301\u5927\u6570\u636e\u91cf\u7684\u67e5\u8be2\uff0c\u4f8b\u5982\u589e\u52a0\u5185\u5b58\u3001\u4f18\u5316\u78c1\u76d8\u8bfb\u5199\u901f\u5ea6\u7b49\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2><a id=\"webappi%E6%8E%A5%E5%8F%A3%E7%9A%84%E5%8D%8F%E8%AE%AE\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>webappi\u63a5\u53e3\u7684\u534f\u8bae<\/h2>\n<ol>\n<li><strong>HTTP\/HTTPS\uff1a<\/strong>\n<ul>\n<li>\u7edd\u5927\u591a\u6570 Web API \u4f7f\u7528 HTTP\uff08Hypertext Transfer Protocol\uff09\u6216\u5176\u52a0\u5bc6\u7248\u672c HTTPS \u6765\u8fdb\u884c\u901a\u4fe1\u3002HTTP\u662f\u4e00\u79cd\u65e0\u72b6\u6001\u7684\u534f\u8bae\uff0c\u901a\u8fc7\u8bf7\u6c42-\u54cd\u5e94\u7684\u65b9\u5f0f\u8fdb\u884c\u901a\u4fe1\u3002RESTful API\uff08Representational State Transfer\uff09\u662f\u4e00\u79cd\u57fa\u4e8e HTTP \u534f\u8bae\u7684\u5e38\u89c1\u8bbe\u8ba1\u98ce\u683c\uff0c\u5b83\u4f7f\u7528 HTTP \u65b9\u6cd5\uff08GET\u3001POST\u3001PUT\u3001DELETE\u7b49\uff09\u5bf9\u8d44\u6e90\u8fdb\u884c\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>SOAP\uff08Simple Object Access Protocol\uff09\uff1a<\/strong>\n<ul>\n<li>SOAP \u662f\u4e00\u79cd\u57fa\u4e8e XML \u7684\u534f\u8bae\uff0c\u7528\u4e8e\u5728\u8ba1\u7b97\u673a\u7f51\u7edc\u4e0a\u4ea4\u6362\u7ed3\u6784\u5316\u7684\u4fe1\u606f\u3002\u5b83\u5b9a\u4e49\u4e86\u4e00\u79cd\u901a\u4fe1\u7684\u6846\u67b6\uff0c\u5141\u8bb8\u5728\u4e0d\u540c\u7684\u64cd\u4f5c\u7cfb\u7edf\u548c\u7f16\u7a0b\u8bed\u8a00\u4e4b\u95f4\u8fdb\u884c\u901a\u4fe1\u3002\u76f8\u5bf9\u4e8e REST\uff0cSOAP \u66f4\u4e3a\u5e9e\u5927\uff0c\u652f\u6301\u66f4\u591a\u7684\u529f\u80fd\uff0c\u4f46\u4e5f\u56e0\u6b64\u66f4\u4e3a\u590d\u6742\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>WebSocket\uff1a<\/strong>\uff08\u53ef\u7b97\u53ef\u4e0d\u7b97\uff09\n<ul>\n<li>WebSocket \u662f\u4e00\u79cd\u5728\u5355\u4e2a TCP \u8fde\u63a5\u4e0a\u63d0\u4f9b\u5168\u53cc\u5de5\u901a\u4fe1\u7684\u534f\u8bae\u3002\u4e0e HTTP \u4e0d\u540c\uff0cWebSocket \u5141\u8bb8\u5728\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u5efa\u7acb\u6301\u4e45\u8fde\u63a5\uff0c\u5b9e\u65f6\u63a8\u9001\u6570\u636e\u3002\u8fd9\u4f7f\u5f97\u5b83\u9002\u7528\u4e8e\u9700\u8981\u5b9e\u65f6\u6027\u7684\u5e94\u7528\uff0c\u5982\u5373\u65f6\u901a\u8baf\u548c\u5b9e\u65f6\u6570\u636e\u66f4\u65b0\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2><a id=\"tcp%E5%8D%8F%E8%AE%AE%E5%9B%9B%E6%AC%A1%E6%8C%A5%E6%89%8B\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>TCP\u534f\u8bae\u56db\u6b21\u6325\u624b<\/h2>\n<ol>\n<li><strong>\u7b2c\u4e00\u6b21\u6325\u624b\uff08Client -&gt; Server\uff09\uff1a<\/strong>\n<ul>\n<li>\u5ba2\u6237\u7aef\u53d1\u9001\u4e00\u4e2a\u5e26\u6709 FIN\uff08Finish\uff09\u6807\u5fd7\u7684TCP\u62a5\u6587\u6bb5\uff0c\u8868\u793a\u5b83\u5df2\u7ecf\u5b8c\u6210\u6570\u636e\u7684\u53d1\u9001\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u7b2c\u4e8c\u6b21\u6325\u624b\uff08Server -&gt; Client\uff09\uff1a<\/strong>\n<ul>\n<li>\u670d\u52a1\u5668\u63a5\u6536\u5230\u5ba2\u6237\u7aef\u7684 FIN \u62a5\u6587\u6bb5\uff0c\u4f1a\u53d1\u9001\u4e00\u4e2a ACK\uff08Acknowledgment\uff09\u62a5\u6587\u6bb5\uff0c\u8868\u793a\u5df2\u7ecf\u6536\u5230\u4e86\u5ba2\u6237\u7aef\u7684\u5173\u95ed\u8bf7\u6c42\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u7b2c\u4e09\u6b21\u6325\u624b\uff08Server -&gt; Client\uff09\uff1a<\/strong>\n<ul>\n<li>\u670d\u52a1\u5668\u53d1\u9001\u4e00\u4e2a\u5e26\u6709 FIN \u6807\u5fd7\u7684TCP\u62a5\u6587\u6bb5\uff0c\u8868\u793a\u670d\u52a1\u5668\u5df2\u7ecf\u5b8c\u6210\u6570\u636e\u7684\u53d1\u9001\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u7b2c\u56db\u6b21\u6325\u624b\uff08Client -&gt; Server\uff09\uff1a<\/strong>\n<ul>\n<li>\u5ba2\u6237\u7aef\u63a5\u6536\u5230\u670d\u52a1\u5668\u7684 FIN \u62a5\u6587\u6bb5\uff0c\u4f1a\u53d1\u9001\u4e00\u4e2a ACK \u62a5\u6587\u6bb5\uff0c\u8868\u793a\u5df2\u7ecf\u6536\u5230\u4e86\u670d\u52a1\u5668\u7684\u5173\u95ed\u8bf7\u6c42\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2><a id=\"%E6%8E%A5%E5%8F%A3%E5%89%8D%E7%AB%AF%E8%B0%83%E7%94%A8%E4%B8%BA%E4%BB%80%E4%B9%88%E4%BC%9A%E4%BA%A7%E7%94%9F%E8%B7%A8%E5%9F%9F\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u63a5\u53e3\u524d\u7aef\u8c03\u7528\u4e3a\u4ec0\u4e48\u4f1a\u4ea7\u751f\u8de8\u57df<\/h2>\n<ol>\n<li><strong>\u534f\u8bae\u4e0d\u540c\uff1a<\/strong>\n<ul>\n<li>\u5f53\u524d\u7f51\u9875\u4f7f\u7528\u7684\u534f\u8bae\uff08http\u6216https\uff09\u4e0e\u8bf7\u6c42\u7684\u8d44\u6e90\u4f7f\u7528\u7684\u534f\u8bae\u4e0d\u540c\uff0c\u5c31\u4f1a\u53d1\u751f\u8de8\u57df\u3002\u4f8b\u5982\uff0c\u4e00\u4e2a\u9875\u9762\u4f7f\u7528https\u534f\u8bae\uff0c\u4f46\u8bf7\u6c42\u4e00\u4e2a\u4f7f\u7528http\u534f\u8bae\u7684\u63a5\u53e3\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u57df\u540d\u4e0d\u540c\uff1a<\/strong>\n<ul>\n<li>\u5f53\u524d\u7f51\u9875\u7684\u57df\u540d\u4e0e\u8bf7\u6c42\u7684\u8d44\u6e90\u7684\u57df\u540d\u4e0d\u540c\uff0c\u5c31\u4f1a\u53d1\u751f\u8de8\u57df\u3002\u4f8b\u5982\uff0c\u4e00\u4e2a\u9875\u9762\u5728<code>www.example.com<\/code>\u57df\u4e0b\uff0c\u4f46\u8bf7\u6c42\u4e86<code>api.example-api.com<\/code>\u57df\u4e0b\u7684\u63a5\u53e3\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u7aef\u53e3\u4e0d\u540c\uff1a<\/strong>\n<ul>\n<li>\u5f53\u524d\u7f51\u9875\u7684\u7aef\u53e3\u4e0e\u8bf7\u6c42\u7684\u8d44\u6e90\u7684\u7aef\u53e3\u4e0d\u540c\uff0c\u4e5f\u4f1a\u53d1\u751f\u8de8\u57df\u3002\u4f8b\u5982\uff0c\u4e00\u4e2a\u9875\u9762\u5728<code>www.example.com:8080<\/code>\u57df\u4e0b\uff0c\u4f46\u8bf7\u6c42\u4e86<code>www.example.com:3000<\/code>\u57df\u4e0b\u7684\u63a5\u53e3\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u5b50\u57df\u540d\u4e0d\u540c\uff1a<\/strong>\n<ul>\n<li>\u5373\u4f7f\u662f\u4e0d\u540c\u7684\u5b50\u57df\u540d\uff0c\u4e5f\u4f1a\u88ab\u8ba4\u4e3a\u662f\u8de8\u57df\u3002\u4f8b\u5982\uff0c\u4e00\u4e2a\u9875\u9762\u5728<code>app.example.com<\/code>\u57df\u4e0b\uff0c\u4f46\u8bf7\u6c42\u4e86<code>api.example.com<\/code>\u57df\u4e0b\u7684\u63a5\u53e3\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2><a id=\"%E8%BE%93%E5%87%BA%E5%AD%97%E7%AC%A6%E4%B8%B2%E2%80%9C%E5%85%B0%E5%B7%9E%E6%96%87%E7%90%86%E5%AD%A6%E9%99%A2%E2%80%9D%E4%B8%AD%E7%9A%84%E2%80%9C%E6%96%87%E7%90%86%E5%AD%A6%E9%99%A2%E2%80%9D%E6%9C%89%E5%87%A0%E7%A7%8D%E6%96%B9%E5%BC%8F\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u8f93\u51fa\u5b57\u7b26\u4e32\u201c\u5170\u5dde\u6587\u7406\u5b66\u9662\u201d\u4e2d\u7684\u201c\u6587\u7406\u5b66\u9662\u201d\u6709\u51e0\u79cd\u65b9\u5f0f<\/h2>\n<ol>\n<li>\n<strong>\u5b57\u7b26\u4e32\u622a\u53d6\uff1a<\/strong><\/p>\n<ul>\n<li>\u4f7f\u7528<code>substring<\/code>\u65b9\u6cd5\u53ef\u4ee5\u622a\u53d6\u5b57\u7b26\u4e32\u7684\u6307\u5b9a\u90e8\u5206\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-java\">String originalString = &quot;\u5170\u5dde\u6587\u7406\u5b66\u9662&quot;;\nString targetString = originalString.substring(2); \/\/ \u4ece\u7d22\u5f15\u4e3a2\u7684\u4f4d\u7f6e\u5f00\u59cb\u622a\u53d6\uff0c\u5f97\u5230&quot;\u6587\u7406\u5b66\u9662&quot;\nSystem.out.println(targetString);\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\uff1a<\/strong><\/p>\n<ul>\n<li>\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6765\u5339\u914d\u76ee\u6807\u5b57\u7b26\u4e32\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-java\">import java.util.regex.Matcher;\nimport java.util.regex.Pattern;\n\npublic class Main {\n    public static void main(String[] args) {\n        String originalString = &quot;\u5170\u5dde\u6587\u7406\u5b66\u9662&quot;;\n        String regex = &quot;\u6587\u7406\u5b66\u9662&quot;;\n        \n        Pattern pattern = Pattern.compile(regex);\n        Matcher matcher = pattern.matcher(originalString);\n        \n        if (matcher.find()) {\n            String targetString = matcher.group();\n            System.out.println(targetString);\n        }\n    }\n}\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>\u5b57\u7b26\u4e32\u67e5\u627e\uff1a<\/strong><\/p>\n<ul>\n<li>\u4f7f\u7528<code>indexOf<\/code>\u65b9\u6cd5\u67e5\u627e\u76ee\u6807\u5b57\u7b26\u4e32\u5728\u539f\u59cb\u5b57\u7b26\u4e32\u4e2d\u7684\u4f4d\u7f6e\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-java\">String originalString = &quot;\u5170\u5dde\u6587\u7406\u5b66\u9662&quot;;\nint index = originalString.indexOf(&quot;\u6587\u7406\u5b66\u9662&quot;);\n\nif (index != -1) {\n    String targetString = originalString.substring(index);\n    System.out.println(targetString);\n}\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>\u4f7f\u7528 <code>split<\/code> \u65b9\u6cd5\uff1a<\/strong><\/p>\n<pre><code class=\"language-java\">String originalString = &quot;\u5170\u5dde\u6587\u7406\u5b66\u9662&quot;;\nString[] parts = originalString.split(&quot;\u6587\u7406\u5b66\u9662&quot;);\n\nif (parts.length &gt; 1) {\n    String targetString = parts[1];\n    System.out.println(targetString);\n}\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5b57\u7b26\u6570\u7ec4\uff1a<\/strong><\/p>\n<pre><code class=\"language-java\">String originalString = &quot;\u5170\u5dde\u6587\u7406\u5b66\u9662&quot;;\nchar[] arr = originalString.toCharArray();\nfor(int i = 2; i &lt;= 5; i ++){\n    System.out.print(arr[i]);\n}\n<\/code><\/pre>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>\u5929\u9e4f\u6052\u5b87\u9762\u8bd5 \u5feb\u901f\u6392\u5e8f\u548c\u5192\u6ce1\u6392\u5e8f\u7684\u65f6\u95f4\u590d\u6742\u5ea6 \u5192\u6ce1\u6392\u5e8f\uff08Bubble Sort\uff09\uff1a \u6700\u574f\u65f6\u95f4\u590d\u6742\u5ea6\uff1a O(n^ [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[106],"tags":[],"class_list":["post-15396","post","type-post","status-publish","format-standard","hentry","category-gongsi"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15396","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=15396"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15396\/revisions"}],"predecessor-version":[{"id":15397,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15396\/revisions\/15397"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=15396"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=15396"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=15396"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}