{"id":172463,"date":"2024-11-07T13:20:21","date_gmt":"2024-11-07T05:20:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/172463\/"},"modified":"2024-11-07T13:20:21","modified_gmt":"2024-11-07T05:20:21","slug":"%e5%a6%82%e4%bd%95%e6%8a%8a%e5%ad%97%e7%af%80%e6%95%b8%e7%b5%84%e5%ad%98%e5%84%b2%e5%88%b0%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9f-%e5%ad%97%e7%af%80%e6%95%b8%e7%b5%84%e5%a6%82%e4%bd%95%e5%ad%98%e5%85%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/172463\/","title":{"rendered":"\u5982\u4f55\u628a\u5b57\u7bc0\u6578\u7d44\u5b58\u5132\u5230\u6578\u64da\u5eab\uff1f (\u5b57\u7bc0\u6578\u7d44\u5982\u4f55\u5b58\u5165\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e6%8a%8a%e5%ad%97%e7%af%80%e6%95%b8%e7%b5%84%e5%ad%98%e5%84%b2%e5%88%b0%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9f-uFIrYmCjRu\">\u5982\u4f55\u628a\u5b57\u7bc0\u6578\u7d44\u5b58\u5132\u5230\u6578\u64da\u5eab\uff1f<\/h1>\n<p>\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u958b\u767c\u4e2d\uff0c\u5b57\u7bc0\u6578\u7d44\uff08byte array\uff09\u7d93\u5e38\u7528\u65bc\u5b58\u5132\u4e8c\u9032\u5236\u6578\u64da\uff0c\u4f8b\u5982\u5716\u50cf\u3001\u97f3\u983b\u6587\u4ef6\u6216\u5176\u4ed6\u985e\u578b\u7684\u6587\u4ef6\u3002\u5c07\u5b57\u7bc0\u6578\u7d44\u5b58\u5132\u5230\u6578\u64da\u5eab\u4e2d\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\uff0c\u5c24\u5176\u662f\u5728\u9700\u8981\u8655\u7406\u5927\u91cf\u4e8c\u9032\u5236\u6578\u64da\u7684\u60c5\u6cc1\u4e0b\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5c07\u5b57\u7bc0\u6578\u7d44\u5b58\u5132\u5230\u6578\u64da\u5eab\u4e2d\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e5%ad%97%e7%af%80%e6%95%b8%e7%b5%84%e7%9a%84%e6%a6%82%e5%bf%b5-uFIrYmCjRu\">\u5b57\u7bc0\u6578\u7d44\u7684\u6982\u5ff5<\/h2>\n<p>\u5b57\u7bc0\u6578\u7d44\u662f\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u7528\u65bc\u8868\u793a\u4e00\u7cfb\u5217\u7684\u5b57\u7bc0\u3002\u6bcf\u500b\u5b57\u7bc0\u75318\u4f4d\u7d44\u6210\uff0c\u901a\u5e38\u7528\u65bc\u8868\u793a\u4e8c\u9032\u5236\u6578\u64da\u3002\u5728\u8a31\u591a\u7de8\u7a0b\u8a9e\u8a00\u4e2d\uff0c\u5b57\u7bc0\u6578\u7d44\u53ef\u4ee5\u7528\u4f86\u8655\u7406\u6587\u4ef6\u3001\u5716\u50cf\u6216\u5176\u4ed6\u975e\u6587\u672c\u6578\u64da\u3002\u7576\u9700\u8981\u5c07\u9019\u4e9b\u6578\u64da\u5b58\u5132\u5230\u6578\u64da\u5eab\u4e2d\u6642\uff0c\u5fc5\u9808\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u4f86\u5b58\u5132\u9019\u4e9b\u5b57\u7bc0\u3002<\/p>\n<h2 id=\"%e9%81%b8%e6%93%87%e5%90%88%e9%81%a9%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e9%a1%9e%e5%9e%8b-uFIrYmCjRu\">\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u985e\u578b<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u5b58\u5132\u5b57\u7bc0\u6578\u7d44\u7684\u5e38\u7528\u6578\u64da\u985e\u578b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>BLOB<\/strong>\uff08Binary Large Object\uff09\uff1a\u9069\u5408\u5b58\u5132\u5927\u91cf\u7684\u4e8c\u9032\u5236\u6578\u64da\uff0c\u5982\u5716\u50cf\u548c\u97f3\u983b\u6587\u4ef6\u3002<\/li>\n<li><strong>VARBINARY<\/strong>\uff1a\u9069\u5408\u5b58\u5132\u8b8a\u9577\u7684\u4e8c\u9032\u5236\u6578\u64da\uff0c\u901a\u5e38\u7528\u65bc\u8f03\u5c0f\u7684\u6587\u4ef6\u3002<\/li>\n<li><strong>BYTEA<\/strong>\uff1aPostgreSQL\u4e2d\u7684\u4e00\u7a2e\u6578\u64da\u985e\u578b\uff0c\u7528\u65bc\u5b58\u5132\u4e8c\u9032\u5236\u6578\u64da\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%b0%87%e5%ad%97%e7%af%80%e6%95%b8%e7%b5%84%e5%ad%98%e5%84%b2%e5%88%b0%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e6%ad%a5%e9%a9%9f-uFIrYmCjRu\">\u5c07\u5b57\u7bc0\u6578\u7d44\u5b58\u5132\u5230\u6578\u64da\u5eab\u7684\u6b65\u9a5f<\/h2>\n<h3 id=\"1-%e9%80%a3%e6%8e%a5%e5%88%b0%e6%95%b8%e6%93%9a%e5%ba%ab-uFIrYmCjRu\">1. \u9023\u63a5\u5230\u6578\u64da\u5eab<\/h3>\n<p>\u9996\u5148\uff0c\u60a8\u9700\u8981\u5efa\u7acb\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528Python\u548cSQLite\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>import sqlite3\n\n# \u9023\u63a5\u5230\u6578\u64da\u5eab\nconn = sqlite3.connect('example.db')\ncursor = conn.cursor()<\/code><\/pre>\n<h3 id=\"2-%e5%89%b5%e5%bb%ba%e8%a1%a8%e6%a0%bc-uFIrYmCjRu\">2. \u5275\u5efa\u8868\u683c<\/h3>\n<p>\u63a5\u4e0b\u4f86\uff0c\u60a8\u9700\u8981\u5275\u5efa\u4e00\u500b\u8868\u683c\u4f86\u5b58\u5132\u5b57\u7bc0\u6578\u7d44\u3002\u4ee5\u4e0b\u662f\u5275\u5efa\u4e00\u500b\u5305\u542bBLOB\u985e\u578b\u5b57\u6bb5\u7684\u8868\u683c\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>cursor.execute('''\nCREATE TABLE IF NOT EXISTS files (\n    id INTEGER PRIMARY KEY,\n    data BLOB\n)\n''')<\/code><\/pre>\n<h3 id=\"3-%e6%8f%92%e5%85%a5%e5%ad%97%e7%af%80%e6%95%b8%e7%b5%84-uFIrYmCjRu\">3. \u63d2\u5165\u5b57\u7bc0\u6578\u7d44<\/h3>\n<p>\u7136\u5f8c\uff0c\u60a8\u53ef\u4ee5\u5c07\u5b57\u7bc0\u6578\u7d44\u63d2\u5165\u5230\u8868\u683c\u4e2d\u3002\u4ee5\u4e0b\u662f\u5c07\u5b57\u7bc0\u6578\u7d44\u63d2\u5165\u5230\u6578\u64da\u5eab\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code># \u5047\u8a2d\u6709\u4e00\u500b\u5b57\u7bc0\u6578\u7d44\nbyte_array = b'This is a byte array.'\n\n# \u63d2\u5165\u5b57\u7bc0\u6578\u7d44\ncursor.execute('INSERT INTO files (data) VALUES (?)', (byte_array,))\nconn.commit()<\/code><\/pre>\n<h3 id=\"4-%e6%9f%a5%e8%a9%a2%e5%ad%97%e7%af%80%e6%95%b8%e7%b5%84-uFIrYmCjRu\">4. \u67e5\u8a62\u5b57\u7bc0\u6578\u7d44<\/h3>\n<p>\u6700\u5f8c\uff0c\u60a8\u53ef\u4ee5\u5f9e\u6578\u64da\u5eab\u4e2d\u67e5\u8a62\u5b57\u7bc0\u6578\u7d44\u3002\u4ee5\u4e0b\u662f\u67e5\u8a62\u4e26\u8b80\u53d6\u5b57\u7bc0\u6578\u7d44\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>cursor.execute('SELECT data FROM files WHERE id = 1')\ndata = cursor.fetchone()[0]\nprint(data)<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-uFIrYmCjRu\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u5c07\u5b57\u7bc0\u6578\u7d44\u5b58\u5132\u5230\u6578\u64da\u5eab\u6642\uff0c\u6709\u5e7e\u500b\u6ce8\u610f\u4e8b\u9805\u9700\u8981\u8003\u616e\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u914d\u7f6e\u80fd\u5920\u652f\u6301\u6240\u9700\u7684\u6578\u64da\u985e\u578b\u3002<\/li>\n<li>\u8003\u616e\u6578\u64da\u7684\u5927\u5c0f\uff0c\u7279\u5225\u662f\u5728\u4f7f\u7528BLOB\u985e\u578b\u6642\uff0c\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\u3002<\/li>\n<li>\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u8003\u616e\u4f7f\u7528\u6d41\u5f0f\u8655\u7406\u4f86\u907f\u514d\u5167\u5b58\u554f\u984c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-uFIrYmCjRu\">\u7e3d\u7d50<\/h2>\n<p>\u5c07\u5b57\u7bc0\u6578\u7d44\u5b58\u5132\u5230\u6578\u64da\u5eab\u662f\u4e00\u500b\u91cd\u8981\u7684\u6280\u8853\uff0c\u5c24\u5176\u662f\u5728\u9700\u8981\u8655\u7406\u4e8c\u9032\u5236\u6578\u64da\u7684\u61c9\u7528\u4e2d\u3002\u901a\u904e\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u4e26\u9075\u5faa\u6b63\u78ba\u7684\u6b65\u9a5f\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u5730\u5c07\u5b57\u7bc0\u6578\u7d44\u5b58\u5132\u5230\u6578\u64da\u5eab\u4e2d\u3002\u7121\u8ad6\u60a8\u662f\u4f7f\u7528SQLite\u3001MySQL\u9084\u662fPostgreSQL\uff0c\u9019\u4e9b\u57fa\u672c\u539f\u5247\u90fd\u9069\u7528\u65bc\u5404\u7a2e\u6578\u64da\u5eab\u7cfb\u7d71\u3002\u5982\u679c\u60a8\u9700\u8981\u9ad8\u6548\u7684\u6578\u64da\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c<a href=\"https:\/\/server.hk\">Server.HK<\/a>\u90fd\u80fd\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5c07\u5b57\u7bc0\u6578\u7d44\u6709\u6548\u5730\u5b58\u5132\u5230\u6578\u64da\u5eab\u4e2d\uff0c\u5305\u62ec\u6578\u64da\u985e\u578b\u9078\u64c7\u548c\u64cd\u4f5c\u6b65\u9a5f\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-172463","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/172463","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=172463"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/172463\/revisions"}],"predecessor-version":[{"id":172464,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/172463\/revisions\/172464"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=172463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=172463"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=172463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}