{"id":61921,"date":"2024-10-13T14:44:19","date_gmt":"2024-10-13T06:44:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/61921\/"},"modified":"2024-10-13T14:44:19","modified_gmt":"2024-10-13T06:44:19","slug":"java%e6%8a%80%e5%b7%a7%e5%a4%a7%e6%9b%9d%e5%85%89%ef%bc%9a%e5%a6%82%e4%bd%95%e5%b0%87%e5%9c%96%e7%89%87%e5%ad%98%e5%84%b2%e5%88%b0mysql%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9f-java%e5%ad%98%e5%84%b2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/61921\/","title":{"rendered":"Java\u6280\u5de7\u5927\u66dd\u5149\uff1a\u5982\u4f55\u5c07\u5716\u7247\u5b58\u5132\u5230MySQL\u6578\u64da\u5eab\uff1f (java\u5b58\u5132\u5716\u7247\u5230mysql\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"java%e6%8a%80%e5%b7%a7%e5%a4%a7%e6%9b%9d%e5%85%89%ef%bc%9a%e5%a6%82%e4%bd%95%e5%b0%87%e5%9c%96%e7%89%87%e5%ad%98%e5%84%b2%e5%88%b0mysql%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9f-wBtjnxAzCl\">Java\u6280\u5de7\u5927\u66dd\u5149\uff1a\u5982\u4f55\u5c07\u5716\u7247\u5b58\u5132\u5230MySQL\u6578\u64da\u5eab\uff1f<\/h1>\n<p>\u5728\u73fe\u4eca\u7684\u7db2\u7d61\u61c9\u7528\u4e2d\uff0c\u5716\u7247\u7684\u5b58\u5132\u548c\u7ba1\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\u4e00\u74b0\u3002\u8a31\u591a\u958b\u767c\u8005\u9078\u64c7\u5c07\u5716\u7247\u76f4\u63a5\u5b58\u5132\u5230MySQL\u6578\u64da\u5eab\u4e2d\uff0c\u4ee5\u4fbf\u65bc\u7ba1\u7406\u548c\u6aa2\u7d22\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528Java\u5c07\u5716\u7247\u5b58\u5132\u5230MySQL\u6578\u64da\u5eab\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%81%b8%e6%93%87%e5%b0%87%e5%9c%96%e7%89%87%e5%ad%98%e5%84%b2%e5%88%b0mysql%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9f-wBtjnxAzCl\">\u70ba\u4ec0\u9ebc\u9078\u64c7\u5c07\u5716\u7247\u5b58\u5132\u5230MySQL\u6578\u64da\u5eab\uff1f<\/h2>\n<p>\u5c07\u5716\u7247\u5b58\u5132\u5230\u6578\u64da\u5eab\u4e2d\u6709\u5e7e\u500b\u512a\u9ede\uff1a<\/p>\n<ul>\n<li><strong>\u96c6\u4e2d\u7ba1\u7406\uff1a<\/strong>\u6240\u6709\u6578\u64da\uff08\u5305\u62ec\u5716\u7247\uff09\u90fd\u5b58\u5132\u5728\u540c\u4e00\u4f4d\u7f6e\uff0c\u4fbf\u65bc\u5099\u4efd\u548c\u6062\u5fa9\u3002<\/li>\n<li><strong>\u5b89\u5168\u6027\uff1a<\/strong>\u6578\u64da\u5eab\u53ef\u4ee5\u63d0\u4f9b\u66f4\u597d\u7684\u5b89\u5168\u6027\u63a7\u5236\uff0c\u9632\u6b62\u672a\u7d93\u6388\u6b0a\u7684\u8a2a\u554f\u3002<\/li>\n<li><strong>\u6578\u64da\u5b8c\u6574\u6027\uff1a<\/strong>\u53ef\u4ee5\u4f7f\u7528\u6578\u64da\u5eab\u7684\u7d04\u675f\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%ba%96%e5%82%99%e5%b7%a5%e4%bd%9c-wBtjnxAzCl\">\u6e96\u5099\u5de5\u4f5c<\/h2>\n<p>\u5728\u958b\u59cb\u4e4b\u524d\uff0c\u60a8\u9700\u8981\u78ba\u4fdd\u5df2\u7d93\u5b89\u88dd\u4e86\u4ee5\u4e0b\u74b0\u5883\uff1a<\/p>\n<ul>\n<li>Java Development Kit (JDK)<\/li>\n<li>MySQL\u6578\u64da\u5eab<\/li>\n<li>MySQL Connector\/J\uff08Java\u7684MySQL\u9a45\u52d5\uff09<\/li>\n<\/ul>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%ad%e7%bd%ae-wBtjnxAzCl\">\u6578\u64da\u5eab\u8a2d\u7f6e<\/h2>\n<p>\u9996\u5148\uff0c\u60a8\u9700\u8981\u5728MySQL\u4e2d\u5275\u5efa\u4e00\u500b\u6578\u64da\u5eab\u548c\u4e00\u500b\u8868\u4f86\u5b58\u5132\u5716\u7247\u3002\u4ee5\u4e0b\u662f\u5275\u5efa\u8868\u7684SQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>CREATE DATABASE image_db;\nUSE image_db;\n\nCREATE TABLE images (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    name VARCHAR(255) NOT NULL,\n    image LONGBLOB NOT NULL\n);<\/code><\/pre>\n<h2 id=\"java%e4%bb%a3%e7%a2%bc%e7%a4%ba%e4%be%8b-wBtjnxAzCl\">Java\u4ee3\u78bc\u793a\u4f8b<\/h2>\n<p>\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u5c07\u7de8\u5bebJava\u4ee3\u78bc\u4f86\u5c07\u5716\u7247\u5b58\u5132\u5230\u6578\u64da\u5eab\u4e2d\u3002\u4ee5\u4e0b\u662f\u5b8c\u6574\u7684\u4ee3\u78bc\u793a\u4f8b\uff1a<\/p>\n<pre><code>import java.io.*;\nimport java.sql.*;\n\npublic class ImageStorage {\n    public static void main(String[] args) {\n        String url = \"jdbc:mysql:\/\/localhost:3306\/image_db\";\n        String user = \"your_username\";\n        String password = \"your_password\";\n\n        Connection conn = null;\n        PreparedStatement pstmt = null;\n\n        try {\n            \/\/ \u9023\u63a5\u5230\u6578\u64da\u5eab\n            conn = DriverManager.getConnection(url, user, password);\n            String sql = \"INSERT INTO images (name, image) VALUES (?, ?)\";\n            pstmt = conn.prepareStatement(sql);\n\n            \/\/ \u8b80\u53d6\u5716\u7247\u6587\u4ef6\n            File imageFile = new File(\"path_to_your_image.jpg\");\n            FileInputStream fis = new FileInputStream(imageFile);\n            pstmt.setString(1, imageFile.getName());\n            pstmt.setBinaryStream(2, fis, (int) imageFile.length());\n\n            \/\/ \u57f7\u884c\u63d2\u5165\u64cd\u4f5c\n            pstmt.executeUpdate();\n            System.out.println(\"\u5716\u7247\u5df2\u6210\u529f\u5b58\u5132\u5230\u6578\u64da\u5eab\u4e2d\u3002\");\n\n        } catch (SQLException | FileNotFoundException e) {\n            e.printStackTrace();\n        } finally {\n            try {\n                if (pstmt != null) pstmt.close();\n                if (conn != null) conn.close();\n            } catch (SQLException e) {\n                e.printStackTrace();\n            }\n        }\n    }\n}<\/code><\/pre>\n<h2 id=\"%e5%be%9e%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%aa%a2%e7%b4%a2%e5%9c%96%e7%89%87-wBtjnxAzCl\">\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u5716\u7247<\/h2>\n<p>\u9664\u4e86\u5b58\u5132\u5716\u7247\uff0c\u60a8\u53ef\u80fd\u9084\u9700\u8981\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u5716\u7247\u3002\u4ee5\u4e0b\u662f\u6aa2\u7d22\u5716\u7247\u7684\u4ee3\u78bc\u793a\u4f8b\uff1a<\/p>\n<pre><code>import java.io.*;\nimport java.sql.*;\n\npublic class ImageRetrieval {\n    public static void main(String[] args) {\n        String url = \"jdbc:mysql:\/\/localhost:3306\/image_db\";\n        String user = \"your_username\";\n        String password = \"your_password\";\n\n        Connection conn = null;\n        PreparedStatement pstmt = null;\n        ResultSet rs = null;\n\n        try {\n            \/\/ \u9023\u63a5\u5230\u6578\u64da\u5eab\n            conn = DriverManager.getConnection(url, user, password);\n            String sql = \"SELECT image FROM images WHERE name = ?\";\n            pstmt = conn.prepareStatement(sql);\n            pstmt.setString(1, \"your_image_name.jpg\");\n            rs = pstmt.executeQuery();\n\n            if (rs.next()) {\n                InputStream is = rs.getBinaryStream(\"image\");\n                FileOutputStream fos = new FileOutputStream(\"retrieved_image.jpg\");\n                byte[] buffer = new byte[1024];\n                int bytesRead;\n\n                while ((bytesRead = is.read(buffer)) != -1) {\n                    fos.write(buffer, 0, bytesRead);\n                }\n                fos.close();\n                System.out.println(\"\u5716\u7247\u5df2\u6210\u529f\u6aa2\u7d22\u4e26\u4fdd\u5b58\u3002\");\n            }\n\n        } catch (SQLException | IOException e) {\n            e.printStackTrace();\n        } finally {\n            try {\n                if (rs != null) rs.close();\n                if (pstmt != null) pstmt.close();\n                if (conn != null) conn.close();\n            } catch (SQLException e) {\n                e.printStackTrace();\n            }\n        }\n    }\n}<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-wBtjnxAzCl\">\u7e3d\u7d50<\/h2>\n<p>\u5c07\u5716\u7247\u5b58\u5132\u5230MySQL\u6578\u64da\u5eab\u4e2d\u662f\u4e00\u500b\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u96c6\u4e2d\u7ba1\u7406\u548c\u63d0\u9ad8\u5b89\u5168\u6027\u7684\u60c5\u6cc1\u4e0b\u3002\u901a\u904e\u672c\u6587\u63d0\u4f9b\u7684\u4ee3\u78bc\u793a\u4f8b\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u5730\u5be6\u73fe\u5716\u7247\u7684\u5b58\u5132\u548c\u6aa2\u7d22\u3002\u82e5\u60a8\u9700\u8981\u66f4\u9ad8\u6548\u7684\u6578\u64da\u7ba1\u7406\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216\u5176\u4ed6\u96f2\u670d\u52d9\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528Java\u5c07\u5716\u7247\u6709\u6548\u5b58\u5132\u5230MySQL\u6578\u64da\u5eab\uff0c\u638c\u63e1\u6280\u5de7\u8207\u6b65\u9a5f\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u80fd\u529b\u3002<\/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-61921","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61921","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=61921"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61921\/revisions"}],"predecessor-version":[{"id":61922,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61921\/revisions\/61922"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=61921"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=61921"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=61921"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}