{"id":200684,"date":"2025-05-06T08:18:51","date_gmt":"2025-05-06T00:18:51","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200684\/"},"modified":"2025-05-06T08:18:51","modified_gmt":"2025-05-06T00:18:51","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-flask-%e4%bb%8e-mysql-%e6%95%b0%e6%8d%ae%e5%ba%93%e8%af%bb%e5%8f%96%e5%9b%be%e7%89%87%e5%b9%b6%e8%bf%94%e5%9b%9e%e7%bb%99%e5%89%8d%e7%ab%af%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200684\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 Flask \u4ece MySQL \u6570\u636e\u5e93\u8bfb\u53d6\u56fe\u7247\u5e76\u8fd4\u56de\u7ed9\u524d\u7aef\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5982\u4f55\u4f7f\u7528 Flask \u4ece MySQL \u6570\u636e\u5e93\u8bfb\u53d6\u56fe\u7247\u5e76\u8fd4\u56de\u7ed9\u524d\u7aef\uff1f<\/h1>\n

\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9\u7bc7\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\uff0c\u5b66\u4e0b\u53bb\u5427\uff01\u672c\u6587\u4e3b\u8981\u4f1a\u7ed9\u5927\u5bb6\u8bb2\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5927\u5bb6\u5bf9\u672c\u6587\u6709\u597d\u7684\u5efa\u8bae\u6216\u8005\u770b\u5230\u6709\u4e0d\u8db3\u4e4b\u5904\uff0c\u975e\u5e38\u6b22\u8fce\u5927\u5bb6\u79ef\u6781\u63d0\u51fa\uff01\u5728\u540e\u7eed\u6587\u7ae0\u6211\u4f1a\u7ee7\u7eed\u66f4\u65b0\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

<\/p>\n

\u4ece flask \u8bfb\u53d6 mysql \u6570\u636e\u5e93\u56fe\u7247<\/strong><\/p>\n

\u60f3\u8981\u5728 flask \u4e2d\u8bfb\u53d6 mysql \u6570\u636e\u5e93\u4e2d\u7684\u56fe\u7247\u5e76\u8fd4\u56de\u7ed9\u524d\u7aef\uff0c\u9700\u8981\u6267\u884c\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n

1. \u5728 mysql \u4e2d\u5b58\u50a8\u56fe\u7247<\/strong><\/p>\n

\u9996\u5148\uff0c\u4f60\u9700\u8981\u5c06\u56fe\u7247\u5b58\u50a8\u5728 mysql \u6570\u636e\u5e93\u4e2d\u3002\u53ef\u4ee5\u4f7f\u7528 blob \u6570\u636e\u7c7b\u578b\u6765\u4fdd\u5b58\u56fe\u7247\u4e8c\u8fdb\u5236\u6570\u636e\u3002<\/p>\n

2. \u5728 flask \u4e2d\u8fde\u63a5\u5230\u6570\u636e\u5e93<\/strong><\/p>\n

\u4f7f\u7528 flask-sqlalchemy \u6216 sqlalchemy \u76f4\u63a5\u8fde\u63a5\u5230 mysql \u6570\u636e\u5e93\u3002<\/p>\n

3. \u6267\u884c sql \u67e5\u8be2<\/strong><\/p>\n

\u7f16\u5199\u4e00\u4e2a sql \u67e5\u8be2\u6765\u83b7\u53d6\u56fe\u7247\u6570\u636e\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

select image_data from table_name where id=1<\/pre>\n
4. \u5904\u7406\u67e5\u8be2\u7ed3\u679c<\/strong><\/p>\n
\u6267\u884c\u67e5\u8be2\u540e\uff0c\u4f60\u4f1a\u5f97\u5230\u4e00\u4e2a\u5143\u7ec4\u7c7b\u578b\u7684\u8fd4\u56de\u503c\u3002\u5176\u4e2d\u5305\u542b\u56fe\u50cf\u4e8c\u8fdb\u5236\u6570\u636e\u3002<\/p>\n
5. \u63d0\u53d6\u56fe\u50cf\u6570\u636e<\/strong><\/p>\n
\u4ece\u5143\u7ec4\u4e2d\u63d0\u53d6\u56fe\u50cf\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
row = mysql_t2.execute_query(sq1)\n\nif row == none:\n    raise exception('...')\n\nimage_bytes = row[0]<\/pre>\n
6. \u8fd4\u56de\u7ed9\u524d\u7aef<\/strong><\/p>\n
\u4f7f\u7528 flask \u7684 send_file() \u51fd\u6570\u5c06\u56fe\u50cf\u4e8c\u8fdb\u5236\u6570\u636e\u8fd4\u56de\u7ed9\u524d\u7aef\u3002<\/p>\n
return send_file(image_bytes, mime_type='...')<\/pre>\n
\u6ce8\u610f\uff1a<\/p>\n
    \n
  • execute_query() \u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u5143\u7ec4\u7c7b\u578b\uff0c\u56e0\u6b64\u9700\u8981\u63d0\u53d6\u51fa\u56fe\u50cf\u4e8c\u8fdb\u5236\u6570\u636e\u3002<\/li>\n
  • \u6839\u636e\u56fe\u7247\u7c7b\u578b\u8bbe\u7f6e\u5408\u9002\u7684 mime \u7c7b\u578b\uff0c\u4f8b\u5982\uff1aimage\/png \u6216 image\/jpeg\u3002<\/li>\n<\/ul>\n
    \u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300a\u5982\u4f55\u4f7f\u7528 Flask \u4ece MySQL \u6570\u636e\u5e93\u8bfb\u53d6\u56fe\u7247\u5e76\u8fd4\u56de\u7ed9\u524d\u7aef\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u5427\uff01<\/p>\n
    \n
    \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
    \u5982\u4f55\u4f7f\u7528 Flask \u4ece MyS...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-200684","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200684","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=200684"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200684\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200684"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200684"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200684"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}