{"id":75782,"date":"2024-10-16T01:11:17","date_gmt":"2024-10-15T17:11:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/75782\/"},"modified":"2024-10-16T01:11:17","modified_gmt":"2024-10-15T17:11:17","slug":"mysql-%e6%93%8d%e4%bd%9cblob%e7%9a%84%e7%b6%93%e9%a9%97%e7%a0%94%e8%a8%8e","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/75782\/","title":{"rendered":"MySQL \u64cd\u4f5cBLOB\u7684\u7d93\u9a57\u7814\u8a0e"},"content":{"rendered":"<h1 id=\"mysql-%e6%93%8d%e4%bd%9cblob%e7%9a%84%e7%b6%93%e9%a9%97%e7%a0%94%e8%a8%8e-HBhHGQvCHx\">MySQL \u64cd\u4f5cBLOB\u7684\u7d93\u9a57\u7814\u8a0e<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cBLOB\uff08Binary Large Object\uff09\u662f\u4e00\u7a2e\u91cd\u8981\u7684\u6578\u64da\u985e\u578b\uff0c\u5c08\u9580\u7528\u65bc\u5b58\u5132\u5927\u91cf\u7684\u4e8c\u9032\u5236\u6578\u64da\uff0c\u5982\u5716\u7247\u3001\u97f3\u983b\u548c\u8996\u983b\u7b49\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u5c0dBLOB\u985e\u578b\u7684\u826f\u597d\u652f\u6301\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5728MySQL\u4e2d\u64cd\u4f5cBLOB\u7684\u7d93\u9a57\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u5efa\u8b70\u3002<\/p>\n<h2 id=\"blob%e7%9a%84%e9%a1%9e%e5%9e%8b-HBhHGQvCHx\">BLOB\u7684\u985e\u578b<\/h2>\n<p>MySQL\u4e2d\u6709\u56db\u7a2e\u4e3b\u8981\u7684BLOB\u985e\u578b\uff1a<\/p>\n<ul>\n<li><strong>TINYBLOB<\/strong>\uff1a\u6700\u5927\u9577\u5ea6\u70ba255\u5b57\u7bc0\u3002<\/li>\n<li><strong>BLOB<\/strong>\uff1a\u6700\u5927\u9577\u5ea6\u70ba65,535\u5b57\u7bc0\u3002<\/li>\n<li><strong>MEDIUMBLOB<\/strong>\uff1a\u6700\u5927\u9577\u5ea6\u70ba16,777,215\u5b57\u7bc0\u3002<\/li>\n<li><strong>LONGBLOB<\/strong>\uff1a\u6700\u5927\u9577\u5ea6\u70ba4,294,967,295\u5b57\u7bc0\u3002<\/li>\n<\/ul>\n<p>\u6839\u64da\u9700\u8981\u5b58\u5132\u7684\u6578\u64da\u5927\u5c0f\uff0c\u9078\u64c7\u5408\u9069\u7684BLOB\u985e\u578b\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u9019\u4e0d\u50c5\u5f71\u97ff\u6578\u64da\u5eab\u7684\u6027\u80fd\uff0c\u9084\u6703\u5f71\u97ff\u5b58\u5132\u7684\u6548\u7387\u3002<\/p>\n<h2 id=\"%e5%89%b5%e5%bb%bablob%e5%ad%97%e6%ae%b5-HBhHGQvCHx\">\u5275\u5efaBLOB\u5b57\u6bb5<\/h2>\n<p>\u5728MySQL\u4e2d\u5275\u5efa\u4e00\u500b\u5305\u542bBLOB\u5b57\u6bb5\u7684\u8868\u683c\u975e\u5e38\u7c21\u55ae\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE images (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    image_data LONGBLOB NOT NULL,\n    description VARCHAR(255) NOT NULL\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba`images`\u7684\u8868\u683c\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u500b`LONGBLOB`\u985e\u578b\u7684`image_data`\u5b57\u6bb5\uff0c\u7528\u65bc\u5b58\u5132\u5716\u7247\u6578\u64da\u3002<\/p>\n<h2 id=\"%e6%8f%92%e5%85%a5blob%e6%95%b8%e6%93%9a-HBhHGQvCHx\">\u63d2\u5165BLOB\u6578\u64da<\/h2>\n<p>\u63d2\u5165BLOB\u6578\u64da\u6642\uff0c\u901a\u5e38\u9700\u8981\u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\u4f86\u907f\u514dSQL\u6ce8\u5165\u653b\u64ca\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528PHP\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>&lt;?php\n$mysqli = new mysqli(\"localhost\", \"user\", \"password\", \"database\");\n\nif ($mysqli-&gt;connect_error) {\n    die(\"Connection failed: \" . $mysqli-&gt;connect_error);\n}\n\n$stmt = $mysqli-&gt;prepare(\"INSERT INTO images (image_data, description) VALUES (?, ?)\");\n$stmt-&gt;bind_param(\"bs\", $imageData, $description);\n\n$imageData = file_get_contents(\"path\/to\/image.jpg\");\n$description = \"\u9019\u662f\u4e00\u5f35\u5716\u7247\";\n\n$stmt-&gt;execute();\n$stmt-&gt;close();\n$mysqli-&gt;close();\n?&gt;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528`file_get_contents`\u51fd\u6578\u8b80\u53d6\u5716\u7247\u6587\u4ef6\uff0c\u7136\u5f8c\u5c07\u5176\u63d2\u5165\u5230\u6578\u64da\u5eab\u4e2d\u3002<\/p>\n<h2 id=\"%e6%aa%a2%e7%b4%a2blob%e6%95%b8%e6%93%9a-HBhHGQvCHx\">\u6aa2\u7d22BLOB\u6578\u64da<\/h2>\n<p>\u6aa2\u7d22BLOB\u6578\u64da\u540c\u6a23\u9700\u8981\u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>&lt;?php\n$mysqli = new mysqli(\"localhost\", \"user\", \"password\", \"database\");\n\nif ($mysqli-&gt;connect_error) {\n    die(\"Connection failed: \" . $mysqli-&gt;connect_error);\n}\n\n$stmt = $mysqli-&gt;prepare(\"SELECT image_data, description FROM images WHERE id = ?\");\n$stmt-&gt;bind_param(\"i\", $id);\n\n$id = 1; \/\/ \u5047\u8a2d\u6211\u5011\u8981\u6aa2\u7d22ID\u70ba1\u7684\u5716\u7247\n$stmt-&gt;execute();\n$stmt-&gt;bind_result($imageData, $description);\n$stmt-&gt;fetch();\n\nheader(\"Content-Type: image\/jpeg\");\necho $imageData;\n\n$stmt-&gt;close();\n$mysqli-&gt;close();\n?&gt;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u6839\u64daID\u6aa2\u7d22\u5716\u7247\u6578\u64da\uff0c\u4e26\u5c07\u5176\u4f5c\u70baJPEG\u683c\u5f0f\u7684\u5716\u7247\u8f38\u51fa\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-HBhHGQvCHx\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u64cd\u4f5cBLOB\u6578\u64da\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u914d\u7f6e\u80fd\u5920\u652f\u6301\u5927\u6578\u64da\u91cf\u7684\u5b58\u5132\u3002<\/li>\n<li>\u8003\u616e\u4f7f\u7528\u6587\u4ef6\u7cfb\u7d71\u5b58\u5132\u5927\u6587\u4ef6\uff0c\u4e26\u5728\u6578\u64da\u5eab\u4e2d\u4fdd\u5b58\u6587\u4ef6\u8def\u5f91\uff0c\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<li>\u5b9a\u671f\u5099\u4efd\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-HBhHGQvCHx\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u5c0dBLOB\u6578\u64da\u7684\u652f\u6301\u4f7f\u5f97\u958b\u767c\u8005\u80fd\u5920\u9748\u6d3b\u5730\u8655\u7406\u5404\u7a2e\u4e8c\u9032\u5236\u6578\u64da\u3002\u901a\u904e\u5408\u7406\u7684\u8a2d\u8a08\u548c\u64cd\u4f5c\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u548c\u5b58\u5132\u9019\u4e9b\u6578\u64da\u3002\u7121\u8ad6\u662f\u63d2\u5165\u9084\u662f\u6aa2\u7d22BLOB\u6578\u64da\uff0c\u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\u90fd\u662f\u4e00\u500b\u826f\u597d\u7684\u5be6\u8e10\uff0c\u80fd\u5920\u63d0\u9ad8\u5b89\u5168\u6027\u548c\u6027\u80fd\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u90e8\u7f72\u60a8\u7684MySQL\u6578\u64da\u5eab\uff0c\u4eab\u53d7\u9ad8\u6548\u7684\u6578\u64da\u7ba1\u7406\u9ad4\u9a57\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22MySQL\u4e2dBLOB\u64cd\u4f5c\u7684\u7d93\u9a57\uff0c\u6db5\u84cb\u5b58\u5132\u3001\u6aa2\u7d22\u53ca\u6700\u4f73\u5be6\u8e10\uff0c\u52a9\u60a8\u9ad8\u6548\u7ba1\u7406\u4e8c\u9032\u5236\u6578\u64da\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-75782","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75782","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=75782"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75782\/revisions"}],"predecessor-version":[{"id":75783,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75782\/revisions\/75783"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=75782"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=75782"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=75782"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}