{"id":163737,"date":"2024-11-05T02:00:26","date_gmt":"2024-11-04T18:00:26","guid":{"rendered":"https:\/\/server.hk\/cnblog\/163737\/"},"modified":"2024-11-05T02:00:26","modified_gmt":"2024-11-04T18:00:26","slug":"%e8%a7%a3%e6%b1%ba%e5%8b%95%e6%85%8b%e6%9c%aa%e9%80%a3%e6%8e%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5%e7%9a%84%e6%96%b9%e6%b3%95-%e5%8b%95%e6%85%8b%e6%9c%aa%e9%80%a3%e6%8e%a5%e6%95%b8%e6%93%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/163737\/","title":{"rendered":"\u89e3\u6c7a\u52d5\u614b\u672a\u9023\u63a5\u6578\u64da\u5eab\u9023\u63a5\u7684\u65b9\u6cd5 (\u52d5\u614b\u672a\u9023\u63a5\u6578\u64da\u5eab\u9023\u63a5)"},"content":{"rendered":"<h1 id=\"%e8%a7%a3%e6%b1%ba%e5%8b%95%e6%85%8b%e6%9c%aa%e9%80%a3%e6%8e%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5%e7%9a%84%e6%96%b9%e6%b3%95-%e5%8b%95%e6%85%8b%e6%9c%aa%e9%80%a3%e6%8e%a5%e6%95%b8%e6%93%9a-gyTGGrYLFz\">\u89e3\u6c7a\u52d5\u614b\u672a\u9023\u63a5\u6578\u64da\u5eab\u9023\u63a5\u7684\u65b9\u6cd5 (\u52d5\u614b\u672a\u9023\u63a5\u6578\u64da\u5eab\u9023\u63a5)<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u7db2\u7d61\u61c9\u7528\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u9023\u63a5\u7ba1\u7406\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u7279\u5225\u662f\u5728\u9ad8\u6d41\u91cf\u7684\u74b0\u5883\u4e2d\uff0c\u52d5\u614b\u672a\u9023\u63a5\u6578\u64da\u5eab\u9023\u63a5\uff08Dynamic Unconnected Database Connections\uff09\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u554f\u984c\u548c\u8cc7\u6e90\u6d6a\u8cbb\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u89e3\u6c7a\u9019\u4e00\u554f\u984c\u7684\u65b9\u6cd5\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u9023\u63a5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%8b%95%e6%85%8b%e6%9c%aa%e9%80%a3%e6%8e%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5%ef%bc%9f-gyTGGrYLFz\">\u4ec0\u9ebc\u662f\u52d5\u614b\u672a\u9023\u63a5\u6578\u64da\u5eab\u9023\u63a5\uff1f<\/h2>\n<p>\u52d5\u614b\u672a\u9023\u63a5\u6578\u64da\u5eab\u9023\u63a5\u662f\u6307\u5728\u61c9\u7528\u7a0b\u5e8f\u904b\u884c\u904e\u7a0b\u4e2d\uff0c\u6578\u64da\u5eab\u9023\u63a5\u672a\u80fd\u6210\u529f\u5efa\u7acb\u6216\u5728\u4f7f\u7528\u5f8c\u672a\u80fd\u6b63\u78ba\u95dc\u9589\u7684\u60c5\u6cc1\u3002\u9019\u7a2e\u60c5\u6cc1\u901a\u5e38\u767c\u751f\u5728\u9ad8\u4e26\u767c\u7684\u74b0\u5883\u4e2d\uff0c\u7576\u591a\u500b\u8acb\u6c42\u540c\u6642\u5617\u8a66\u8a2a\u554f\u6578\u64da\u5eab\u6642\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u9023\u63a5\u6c60\u8017\u76e1\u6216\u51fa\u73fe\u9023\u63a5\u8d85\u6642\u7684\u554f\u984c\u3002<\/p>\n<h2 id=\"%e5%8b%95%e6%85%8b%e6%9c%aa%e9%80%a3%e6%8e%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5%e7%9a%84%e5%bd%b1%e9%9f%bf-gyTGGrYLFz\">\u52d5\u614b\u672a\u9023\u63a5\u6578\u64da\u5eab\u9023\u63a5\u7684\u5f71\u97ff<\/h2>\n<ul>\n<li><strong>\u6027\u80fd\u4e0b\u964d\uff1a<\/strong>\u672a\u80fd\u6b63\u78ba\u7ba1\u7406\u6578\u64da\u5eab\u9023\u63a5\u6703\u5c0e\u81f4\u61c9\u7528\u7a0b\u5e8f\u7684\u97ff\u61c9\u6642\u9593\u589e\u52a0\uff0c\u5f71\u97ff\u7528\u6236\u9ad4\u9a57\u3002<\/li>\n<li><strong>\u8cc7\u6e90\u6d6a\u8cbb\uff1a<\/strong>\u6bcf\u500b\u672a\u95dc\u9589\u7684\u9023\u63a5\u90fd\u6703\u4f54\u7528\u7cfb\u7d71\u8cc7\u6e90\uff0c\u9577\u671f\u4e0b\u53bb\u53ef\u80fd\u5c0e\u81f4\u670d\u52d9\u5668\u904e\u8f09\u3002<\/li>\n<li><strong>\u6578\u64da\u4e1f\u5931\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u672a\u80fd\u6b63\u78ba\u8655\u7406\u7684\u9023\u63a5\u53ef\u80fd\u5c0e\u81f4\u6578\u64da\u7684\u4e1f\u5931\u6216\u640d\u58de\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a7%a3%e6%b1%ba%e5%8b%95%e6%85%8b%e6%9c%aa%e9%80%a3%e6%8e%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5%e7%9a%84%e6%96%b9%e6%b3%95-gyTGGrYLFz\">\u89e3\u6c7a\u52d5\u614b\u672a\u9023\u63a5\u6578\u64da\u5eab\u9023\u63a5\u7684\u65b9\u6cd5<\/h2>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8%e9%80%a3%e6%8e%a5%e6%b1%a0-gyTGGrYLFz\">1. \u4f7f\u7528\u9023\u63a5\u6c60<\/h3>\n<p>\u9023\u63a5\u6c60\u662f\u4e00\u7a2e\u6709\u6548\u7684\u7ba1\u7406\u6578\u64da\u5eab\u9023\u63a5\u7684\u6280\u8853\u3002\u901a\u904e\u9810\u5148\u5efa\u7acb\u4e00\u5b9a\u6578\u91cf\u7684\u6578\u64da\u5eab\u9023\u63a5\uff0c\u61c9\u7528\u7a0b\u5e8f\u53ef\u4ee5\u91cd\u8907\u4f7f\u7528\u9019\u4e9b\u9023\u63a5\uff0c\u800c\u4e0d\u662f\u6bcf\u6b21\u90fd\u5275\u5efa\u65b0\u7684\u9023\u63a5\u3002\u9019\u6a23\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u9023\u63a5\u5efa\u7acb\u7684\u958b\u92b7\u3002<\/p>\n<pre><code>import java.sql.Connection;\nimport java.sql.DriverManager;\nimport java.sql.SQLException;\nimport javax.sql.DataSource;\nimport org.apache.commons.dbcp2.BasicDataSource;\n\npublic class DatabaseConnection {\n    private static BasicDataSource dataSource;\n\n    static {\n        dataSource = new BasicDataSource();\n        dataSource.setUrl(\"jdbc:mysql:\/\/localhost:3306\/mydb\");\n        dataSource.setUsername(\"user\");\n        dataSource.setPassword(\"password\");\n        dataSource.setInitialSize(5);\n        dataSource.setMaxTotal(10);\n    }\n\n    public static Connection getConnection() throws SQLException {\n        return dataSource.getConnection();\n    }\n}\n<\/code><\/pre>\n<h3 id=\"2-%e5%ae%9a%e6%9c%9f%e6%aa%a2%e6%9f%a5%e5%92%8c%e6%b8%85%e7%90%86%e9%80%a3%e6%8e%a5-gyTGGrYLFz\">2. \u5b9a\u671f\u6aa2\u67e5\u548c\u6e05\u7406\u9023\u63a5<\/h3>\n<p>\u5b9a\u671f\u6aa2\u67e5\u6578\u64da\u5eab\u9023\u63a5\u7684\u72c0\u614b\uff0c\u4e26\u6e05\u7406\u672a\u4f7f\u7528\u7684\u9023\u63a5\u662f\u4fdd\u6301\u7cfb\u7d71\u7a69\u5b9a\u7684\u91cd\u8981\u6b65\u9a5f\u3002\u53ef\u4ee5\u8a2d\u7f6e\u4e00\u500b\u5b9a\u6642\u4efb\u52d9\uff0c\u5b9a\u671f\u6aa2\u67e5\u9023\u63a5\u6c60\u4e2d\u7684\u9023\u63a5\uff0c\u4e26\u95dc\u9589\u90a3\u4e9b\u9592\u7f6e\u6642\u9593\u904e\u9577\u7684\u9023\u63a5\u3002<\/p>\n<pre><code>public void cleanUpConnections() {\n    try (Connection conn = dataSource.getConnection()) {\n        \/\/ \u6aa2\u67e5\u9023\u63a5\u72c0\u614b\n        if (conn.isClosed()) {\n            \/\/ \u95dc\u9589\u672a\u4f7f\u7528\u7684\u9023\u63a5\n            dataSource.close();\n        }\n    } catch (SQLException e) {\n        e.printStackTrace();\n    }\n}\n<\/code><\/pre>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8%e7%95%b0%e6%ad%a5%e8%99%95%e7%90%86-gyTGGrYLFz\">3. \u4f7f\u7528\u7570\u6b65\u8655\u7406<\/h3>\n<p>\u5728\u9ad8\u4e26\u767c\u7684\u74b0\u5883\u4e2d\uff0c\u4f7f\u7528\u7570\u6b65\u8655\u7406\u53ef\u4ee5\u6709\u6548\u6e1b\u5c11\u6578\u64da\u5eab\u7684\u9023\u63a5\u9700\u6c42\u3002\u901a\u904e\u5c07\u8acb\u6c42\u7570\u6b65\u5316\uff0c\u61c9\u7528\u7a0b\u5e8f\u53ef\u4ee5\u5728\u7b49\u5f85\u6578\u64da\u5eab\u97ff\u61c9\u7684\u540c\u6642\u8655\u7406\u5176\u4ed6\u8acb\u6c42\uff0c\u5f9e\u800c\u63d0\u9ad8\u6574\u9ad4\u6027\u80fd\u3002<\/p>\n<pre><code>CompletableFuture.supplyAsync(() -&gt; {\n    try (Connection conn = DatabaseConnection.getConnection()) {\n        \/\/ \u57f7\u884c\u6578\u64da\u5eab\u64cd\u4f5c\n    } catch (SQLException e) {\n        e.printStackTrace();\n    }\n});\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-gyTGGrYLFz\">\u7e3d\u7d50<\/h2>\n<p>\u52d5\u614b\u672a\u9023\u63a5\u6578\u64da\u5eab\u9023\u63a5\u662f\u4e00\u500b\u5e38\u898b\u7684\u554f\u984c\uff0c\u4f46\u901a\u904e\u4f7f\u7528\u9023\u63a5\u6c60\u3001\u5b9a\u671f\u6aa2\u67e5\u548c\u6e05\u7406\u9023\u63a5\u4ee5\u53ca\u7570\u6b65\u8655\u7406\u7b49\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u9019\u4e00\u554f\u984c\u3002\u9019\u4e0d\u50c5\u80fd\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\uff0c\u9084\u80fd\u6e1b\u5c11\u8cc7\u6e90\u7684\u6d6a\u8cbb\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u5eab\u7ba1\u7406\u7684\u4f01\u696d\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u6216 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u4ee5\u78ba\u4fdd\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u89e3\u6c7a\u52d5\u614b\u672a\u9023\u63a5\u6578\u64da\u5eab\u9023\u63a5\u554f\u984c\u7684\u65b9\u6cd5\uff0c\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\u8207\u7a69\u5b9a\u6027\uff0c\u78ba\u4fdd\u6578\u64da\u6d41\u66a2\u904b\u884c\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-163737","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163737","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=163737"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163737\/revisions"}],"predecessor-version":[{"id":163738,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163737\/revisions\/163738"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=163737"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=163737"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=163737"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}