{"id":60391,"date":"2024-10-13T02:28:16","date_gmt":"2024-10-12T18:28:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60391\/"},"modified":"2024-10-13T02:28:16","modified_gmt":"2024-10-12T18:28:16","slug":"db2%e8%a1%a8%e6%a0%bc%e6%93%8d%e4%bd%9c%e6%8a%80%e5%b7%a7%e5%b0%8e%e5%87%balob%e6%95%b8%e6%93%9a%e7%9a%84%e6%8c%87%e5%8d%97%e9%87%9d","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60391\/","title":{"rendered":"DB2\u8868\u683c\u64cd\u4f5c\u6280\u5de7\u5c0e\u51faLOB\u6578\u64da\u7684\u6307\u5357\u91dd"},"content":{"rendered":"<h1 id=\"db2%e8%a1%a8%e6%a0%bc%e6%93%8d%e4%bd%9c%e6%8a%80%e5%b7%a7%e5%b0%8e%e5%87%balob%e6%95%b8%e6%93%9a%e7%9a%84%e6%8c%87%e5%8d%97%e9%87%9d-heXEpXCVyk\">DB2\u8868\u683c\u64cd\u4f5c\u6280\u5de7\u5c0e\u51faLOB\u6578\u64da\u7684\u6307\u5357\u91dd<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cLOB\uff08Large Object\uff09\u6578\u64da\u985e\u578b\u901a\u5e38\u7528\u65bc\u5b58\u5132\u5927\u91cf\u7684\u6578\u64da\uff0c\u5982\u5716\u7247\u3001\u97f3\u983b\u548c\u8996\u983b\u7b49\u3002IBM\u7684DB2\u6578\u64da\u5eab\u7cfb\u7d71\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u529f\u80fd\u4f86\u8655\u7406\u9019\u4e9bLOB\u6578\u64da\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u6709\u6548\u5730\u5c0e\u51faDB2\u4e2d\u7684LOB\u6578\u64da\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u6280\u5de7\u548c\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%aflob%e6%95%b8%e6%93%9a%ef%bc%9f-heXEpXCVyk\">\u4ec0\u9ebc\u662fLOB\u6578\u64da\uff1f<\/h2>\n<p>LOB\u6578\u64da\u985e\u578b\u4e3b\u8981\u5206\u70ba\u4e09\u7a2e\uff1aBLOB\uff08Binary Large Object\uff09\u3001CLOB\uff08Character Large Object\uff09\u548cDBCLOB\uff08Double-Byte Character Large Object\uff09\u3002\u9019\u4e9b\u6578\u64da\u985e\u578b\u7684\u4e3b\u8981\u7279\u9ede\u662f\u80fd\u5920\u5b58\u5132\u5927\u91cf\u7684\u4e8c\u9032\u5236\u6216\u5b57\u7b26\u6578\u64da\uff0c\u4e26\u4e14\u5728\u6578\u64da\u5eab\u4e2d\u901a\u5e38\u4ee5\u6307\u91dd\u7684\u5f62\u5f0f\u5b58\u5728\u3002<\/p>\n<h2 id=\"%e5%b0%8e%e5%87%balob%e6%95%b8%e6%93%9a%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%ad%a5%e9%a9%9f-heXEpXCVyk\">\u5c0e\u51faLOB\u6578\u64da\u7684\u57fa\u672c\u6b65\u9a5f<\/h2>\n<p>\u5c0e\u51faLOB\u6578\u64da\u7684\u904e\u7a0b\u901a\u5e38\u5305\u62ec\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<ul>\n<li>\u9023\u63a5\u5230DB2\u6578\u64da\u5eab<\/li>\n<li>\u67e5\u8a62\u5305\u542bLOB\u6578\u64da\u7684\u8868\u683c<\/li>\n<li>\u4f7f\u7528\u9069\u7576\u7684\u5de5\u5177\u6216\u8a9e\u53e5\u5c0e\u51fa\u6578\u64da<\/li>\n<\/ul>\n<h3 id=\"1-%e9%80%a3%e6%8e%a5%e5%88%b0db2%e6%95%b8%e6%93%9a%e5%ba%ab-heXEpXCVyk\">1. \u9023\u63a5\u5230DB2\u6578\u64da\u5eab<\/h3>\n<p>\u9996\u5148\uff0c\u60a8\u9700\u8981\u4f7f\u7528DB2\u7684CLI\uff08Command Line Interface\uff09\u6216\u5176\u4ed6\u6578\u64da\u5eab\u7ba1\u7406\u5de5\u5177\u9023\u63a5\u5230\u60a8\u7684DB2\u6578\u64da\u5eab\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528CLI\u9023\u63a5\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>db2 connect to your_database user your_username using your_password<\/code><\/pre>\n<h3 id=\"2-%e6%9f%a5%e8%a9%a2%e5%8c%85%e5%90%ablob%e6%95%b8%e6%93%9a%e7%9a%84%e8%a1%a8%e6%a0%bc-heXEpXCVyk\">2. \u67e5\u8a62\u5305\u542bLOB\u6578\u64da\u7684\u8868\u683c<\/h3>\n<p>\u5728\u9023\u63a5\u6210\u529f\u5f8c\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528SQL\u67e5\u8a62\u4f86\u6aa2\u7d22\u5305\u542bLOB\u6578\u64da\u7684\u8868\u683c\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u60a8\u6709\u4e00\u500b\u540d\u70ba\u201cdocuments\u201d\u7684\u8868\u683c\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u500bCLOB\u985e\u578b\u7684\u5217\u201ccontent\u201d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT id, content FROM documents<\/code><\/pre>\n<h3 id=\"3-%e5%b0%8e%e5%87%balob%e6%95%b8%e6%93%9a-heXEpXCVyk\">3. \u5c0e\u51faLOB\u6578\u64da<\/h3>\n<p>\u5c0e\u51faLOB\u6578\u64da\u7684\u65b9\u5f0f\u6709\u591a\u7a2e\uff0c\u4ee5\u4e0b\u662f\u5e7e\u7a2e\u5e38\u898b\u7684\u65b9\u6cd5\uff1a<\/p>\n<h4 id=\"%e4%bd%bf%e7%94%a8db2%e7%9a%84export%e5%91%bd%e4%bb%a4-heXEpXCVyk\">\u4f7f\u7528DB2\u7684EXPORT\u547d\u4ee4<\/h4>\n<p>DB2\u63d0\u4f9b\u4e86EXPORT\u547d\u4ee4\u4f86\u5c0e\u51fa\u6578\u64da\u3002\u5c0d\u65bcLOB\u6578\u64da\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>db2 \"EXPORT TO documents.ixf OF IXF SELECT id, content FROM documents\"<\/code><\/pre>\n<p>\u9019\u5c07\u5c0e\u51fa\u201cdocuments\u201d\u8868\u683c\u4e2d\u7684\u6240\u6709\u6578\u64da\uff0c\u5305\u62ecLOB\u6578\u64da\u3002<\/p>\n<h4 id=\"%e4%bd%bf%e7%94%a8%e7%a8%8b%e5%ba%8f%e8%aa%9e%e8%a8%80%e5%b0%8e%e5%87%ba-heXEpXCVyk\">\u4f7f\u7528\u7a0b\u5e8f\u8a9e\u8a00\u5c0e\u51fa<\/h4>\n<p>\u5982\u679c\u60a8\u9700\u8981\u66f4\u9748\u6d3b\u7684\u5c0e\u51fa\u65b9\u5f0f\uff0c\u53ef\u4ee5\u4f7f\u7528Java\u6216Python\u7b49\u7de8\u7a0b\u8a9e\u8a00\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528Java\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nimport java.sql.*;\nimport java.io.*;\n\npublic class ExportLOB {\n    public static void main(String[] args) {\n        try {\n            Connection conn = DriverManager.getConnection(\"jdbc:db2:\/\/localhost:50000\/your_database\", \"your_username\", \"your_password\");\n            Statement stmt = conn.createStatement();\n            ResultSet rs = stmt.executeQuery(\"SELECT id, content FROM documents\");\n\n            while (rs.next()) {\n                int id = rs.getInt(\"id\");\n                Clob clob = rs.getClob(\"content\");\n                Reader reader = clob.getCharacterStream();\n                BufferedReader br = new BufferedReader(reader);\n                String line;\n                FileWriter writer = new FileWriter(\"document_\" + id + \".txt\");\n                while ((line = br.readLine()) != null) {\n                    writer.write(line);\n                }\n                writer.close();\n            }\n            conn.close();\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n    }\n}\n<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-heXEpXCVyk\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u5c0e\u51faLOB\u6578\u64da\u6642\uff0c\u60a8\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u60a8\u6709\u8db3\u5920\u7684\u6b0a\u9650\u4f86\u8a2a\u554f\u548c\u5c0e\u51faLOB\u6578\u64da\u3002<\/li>\n<li>\u6839\u64daLOB\u6578\u64da\u7684\u5927\u5c0f\uff0c\u5c0e\u51fa\u904e\u7a0b\u53ef\u80fd\u9700\u8981\u8f03\u9577\u7684\u6642\u9593\u3002<\/li>\n<li>\u5728\u5c0e\u51fa\u904e\u7a0b\u4e2d\uff0c\u8acb\u6ce8\u610f\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-heXEpXCVyk\">\u7e3d\u7d50<\/h2>\n<p>\u5c0e\u51faDB2\u4e2d\u7684LOB\u6578\u64da\u662f\u4e00\u500b\u76f8\u5c0d\u7c21\u55ae\u7684\u904e\u7a0b\uff0c\u53ea\u9700\u9075\u5faa\u4e0a\u8ff0\u6b65\u9a5f\u5373\u53ef\u3002\u7121\u8ad6\u662f\u4f7f\u7528DB2\u7684\u5167\u5efa\u547d\u4ee4\u9084\u662f\u7de8\u7a0b\u8a9e\u8a00\uff0c\u60a8\u90fd\u53ef\u4ee5\u9748\u6d3b\u5730\u8655\u7406\u548c\u5c0e\u51faLOB\u6578\u64da\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u638c\u63e1DB2\u8868\u683c\u64cd\u4f5c\u6280\u5de7\uff0c\u8f15\u9b06\u5c0e\u51faLOB\u6578\u64da\u7684\u5be6\u7528\u6307\u5357\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u52a9\u4f60\u4e8b\u534a\u529f\u500d\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-60391","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60391","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=60391"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60391\/revisions"}],"predecessor-version":[{"id":60392,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60391\/revisions\/60392"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60391"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60391"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60391"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}