{"id":2892,"date":"2023-12-11T22:38:46","date_gmt":"2023-12-11T14:38:46","guid":{"rendered":"https:\/\/www.tra56.com\/?p=2892"},"modified":"2023-12-11T22:38:46","modified_gmt":"2023-12-11T14:38:46","slug":"2892","status":"publish","type":"post","link":"https:\/\/www.tra56.com\/2892.html","title":{"rendered":"python + mysql \u6570\u636e\u5e93\u8fde\u63a5\u6c60"},"content":{"rendered":"

\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u662f\u4e00\u79cd\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u7ba1\u7406\u548c\u5206\u914d\u6570\u636e\u5e93\u8fde\u63a5\uff0c\u4ece\u800c\u63d0\u9ad8\u5e94\u7528\u7a0b\u5e8f\u5bf9\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u6027\u80fd\u3002\u4f7f\u7528\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u53ef\u4ee5\u907f\u514d\u9891\u7e41\u5730\u521b\u5efa\u548c\u9500\u6bc1\u6570\u636e\u5e93\u8fde\u63a5\uff0c\u800c\u662f\u91cd\u590d\u4f7f\u7528\u73b0\u6709\u7684\u8fde\u63a5\u3002\u8fd9\u6837\u53ef\u4ee5\u51cf\u5c11\u6570\u636e\u5e93\u8fde\u63a5\u7684\u5f00\u9500\uff0c\u63d0\u9ad8\u5e94\u7528\u7a0b\u5e8f\u7684\u54cd\u5e94\u901f\u5ea6\u3002<\/p>\n

\u5728\u4f7f\u7528\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u4e4b\u540e\uff0c\u5e94\u7528\u7a0b\u5e8f\u4e0d\u9700\u8981\u7f16\u5199\u8fde\u63a5\u6570\u636e\u5e93\u7684\u4ee3\u7801\uff0c\u800c\u662f\u76f4\u63a5\u4ece\u6570\u636e\u6e90\u83b7\u5f97\u6570\u636e\u5e93\u7684\u8fde\u63a5\u3002\u5e38\u89c1\u7684\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u5b9e\u73b0\u5305\u62ecApache Commons DBCP\u3001C3P0\u548cHikariCP\u7b49\u3002<\/p>\n

\u4e0b\u9762\u662f\u4e00\u4e2a\u4f7f\u7528Python\u4e2d\u7684DBUtils\u5e93\u5b9e\u73b0\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u7684\u4f8b\u5b50\uff1a<\/p>\n

from dbutils.pooled_db import PooledDB\r\nimport pymysql\r\n\r\n# \u521b\u5efa\u6570\u636e\u5e93\u8fde\u63a5\u6c60\r\npool = PooledDB(\r\n    creator=pymysql,  # \u4f7f\u7528pymysql\u4f5c\u4e3a\u8fde\u63a5\u6c60\u7684\u5b9e\u73b0\r\n    maxconnections=5,  # \u8fde\u63a5\u6c60\u5141\u8bb8\u7684\u6700\u5927\u8fde\u63a5\u6570\r\n    mincached=2,  # \u521d\u59cb\u5316\u65f6\u8fde\u63a5\u6c60\u4e2d\u81f3\u5c11\u521b\u5efa\u7684\u7a7a\u95f2\u8fde\u63a5\u6570\r\n    maxcached=5,  # \u8fde\u63a5\u6c60\u4e2d\u6700\u591a\u5141\u8bb8\u7684\u7a7a\u95f2\u8fde\u63a5\u6570\r\n    maxshared=3,  # \u8fde\u63a5\u6c60\u4e2d\u6700\u591a\u5141\u8bb8\u7684\u5171\u4eab\u8fde\u63a5\u6570\r\n    blocking=True,  # \u5f53\u8fde\u63a5\u6c60\u4e2d\u6ca1\u6709\u53ef\u7528\u8fde\u63a5\u65f6\uff0c\u662f\u5426\u963b\u585e\u7b49\u5f85\r\n    maxusage=None,  # \u4e00\u4e2a\u8fde\u63a5\u6700\u591a\u88ab\u91cd\u590d\u4f7f\u7528\u7684\u6b21\u6570\uff0cNone\u8868\u793a\u65e0\u9650\u5236\r\n    setsession=[],  # \u6bcf\u6b21\u8fde\u63a5\u65f6\u90fd\u4f1a\u6267\u884c\u7684\u547d\u4ee4\u5217\u8868\r\n    ping=0,  # \u68c0\u67e5\u8fde\u63a5\u662f\u5426\u53ef\u7528\u7684SQL\u8bed\u53e5\u6216\u51fd\u6570\uff0c0\u8868\u793a\u4e0d\u68c0\u67e5\r\n    host='localhost',\r\n    port=3306,\r\n    user='root',\r\n    password='123456',\r\n    database='test'\r\n)\r\n\r\n# \u4ece\u8fde\u63a5\u6c60\u4e2d\u83b7\u53d6\u8fde\u63a5\r\nconn = pool.connection()\r\n\r\n# \u4f7f\u7528\u8fde\u63a5\u8fdb\u884c\u6570\u636e\u5e93\u64cd\u4f5c\r\ncursor = conn.cursor()\r\ncursor.execute('SELECT * FROM users')\r\nresult = cursor.fetchall()\r\nprint(result)\r\n\r\n# \u5c06\u8fde\u63a5\u5f52\u8fd8\u7ed9\u8fde\u63a5\u6c60\r\nconn.close()<\/pre>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u662f\u4e00\u79cd\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u7ba1\u7406\u548c\u5206\u914d\u6570\u636e\u5e93\u8fde\u63a5\uff0c\u4ece\u800c\u63d0\u9ad8\u5e94\u7528\u7a0b\u5e8f\u5bf9\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u6027\u80fd\u3002\u4f7f\u7528\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u53ef\u4ee5\u907f […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[],"class_list":["post-2892","post","type-post","status-publish","format-standard","hentry","category-python3"],"_links":{"self":[{"href":"https:\/\/www.tra56.com\/wp-json\/wp\/v2\/posts\/2892"}],"collection":[{"href":"https:\/\/www.tra56.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tra56.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tra56.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tra56.com\/wp-json\/wp\/v2\/comments?post=2892"}],"version-history":[{"count":1,"href":"https:\/\/www.tra56.com\/wp-json\/wp\/v2\/posts\/2892\/revisions"}],"predecessor-version":[{"id":2893,"href":"https:\/\/www.tra56.com\/wp-json\/wp\/v2\/posts\/2892\/revisions\/2893"}],"wp:attachment":[{"href":"https:\/\/www.tra56.com\/wp-json\/wp\/v2\/media?parent=2892"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tra56.com\/wp-json\/wp\/v2\/categories?post=2892"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tra56.com\/wp-json\/wp\/v2\/tags?post=2892"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}