{"id":183746,"date":"2024-11-10T07:23:21","date_gmt":"2024-11-09T23:23:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/183746\/"},"modified":"2024-11-10T07:23:22","modified_gmt":"2024-11-09T23:23:22","slug":"%e4%bd%bf%e7%94%a8java%e5%ae%9a%e6%99%82%e5%99%a8%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e8%87%aa%e5%8b%95%e6%9b%b4%e6%96%b0-java%e5%ae%9a%e6%99%82%e4%bf%ae%e6%94%b9%e6%95%b8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/183746\/","title":{"rendered":"\u4f7f\u7528Java\u5b9a\u6642\u5668\u5be6\u73fe\u6578\u64da\u5eab\u6578\u64da\u81ea\u52d5\u66f4\u65b0 (java\u5b9a\u6642\u4fee\u6539\u6578\u64da\u5eab\u6578\u64da\u5eab\u6578\u64da)"},"content":{"rendered":"<h1 id=\"%e4%bd%bf%e7%94%a8java%e5%ae%9a%e6%99%82%e5%99%a8%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e8%87%aa%e5%8b%95%e6%9b%b4%e6%96%b0-hHWyGNrVXh\">\u4f7f\u7528Java\u5b9a\u6642\u5668\u5be6\u73fe\u6578\u64da\u5eab\u6578\u64da\u81ea\u52d5\u66f4\u65b0<\/h1>\n<p>\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u4e2d\uff0c\u81ea\u52d5\u5316\u6578\u64da\u66f4\u65b0\u662f\u4e00\u500b\u91cd\u8981\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u5b9a\u671f\u6e05\u7406\u6578\u64da\u3001\u66f4\u65b0\u5831\u544a\u9084\u662f\u540c\u6b65\u5916\u90e8\u6578\u64da\u6e90\uff0c\u4f7f\u7528Java\u5b9a\u6642\u5668\u4f86\u5be6\u73fe\u6578\u64da\u5eab\u7684\u81ea\u52d5\u66f4\u65b0\u662f\u4e00\u500b\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528Java\u7684\u5b9a\u6642\u5668\u529f\u80fd\u4f86\u5be6\u73fe\u6578\u64da\u5eab\u6578\u64da\u7684\u81ea\u52d5\u66f4\u65b0\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n<h2 id=\"java%e5%ae%9a%e6%99%82%e5%99%a8%e6%a6%82%e8%bf%b0-hHWyGNrVXh\">Java\u5b9a\u6642\u5668\u6982\u8ff0<\/h2>\n<p>Java\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u5f0f\u4f86\u5be6\u73fe\u5b9a\u6642\u4efb\u52d9\uff0c\u5176\u4e2d\u6700\u5e38\u7528\u7684\u662f\u4f7f\u7528<code>java.util.Timer<\/code>\u548c<code>java.util.TimerTask<\/code>\u985e\u3002\u9019\u4e9b\u985e\u5141\u8a31\u958b\u767c\u8005\u5275\u5efa\u4e00\u500b\u5b9a\u6642\u5668\uff0c\u4e26\u5728\u6307\u5b9a\u7684\u6642\u9593\u9593\u9694\u5167\u57f7\u884c\u4efb\u52d9\u3002<\/p>\n<h3 id=\"timer%e5%92%8ctimertask%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%94%a8%e6%b3%95-hHWyGNrVXh\">Timer\u548cTimerTask\u7684\u57fa\u672c\u7528\u6cd5<\/h3>\n<p>\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u5275\u5efa\u4e00\u500b\u7e7c\u627f\u81ea<code>TimerTask<\/code>\u7684\u985e\uff0c\u4e26\u5728\u5176<code>run<\/code>\u65b9\u6cd5\u4e2d\u7de8\u5beb\u6211\u5011\u5e0c\u671b\u5b9a\u671f\u57f7\u884c\u7684\u4ee3\u78bc\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u9700\u8981\u6bcf\u9694\u4e00\u5c0f\u6642\u66f4\u65b0\u4e00\u6b21\u6578\u64da\u5eab\u4e2d\u7684\u67d0\u4e9b\u6578\u64da\uff1a<\/p>\n<pre><code>import java.util.Timer;\nimport java.util.TimerTask;\n\npublic class DatabaseUpdater extends TimerTask {\n    @Override\n    public void run() {\n        \/\/ \u5728\u9019\u88e1\u57f7\u884c\u6578\u64da\u5eab\u66f4\u65b0\u64cd\u4f5c\n        System.out.println(\"Updating database...\");\n        \/\/ \u4f8b\u5982\uff0c\u8abf\u7528\u6578\u64da\u5eab\u66f4\u65b0\u65b9\u6cd5\n        updateDatabase();\n    }\n\n    private void updateDatabase() {\n        \/\/ \u6578\u64da\u5eab\u66f4\u65b0\u908f\u8f2f\n        \/\/ \u9019\u88e1\u53ef\u4ee5\u4f7f\u7528JDBC\u6216\u5176\u4ed6\u6578\u64da\u5eab\u9023\u63a5\u65b9\u5f0f\n    }\n}\n<\/code><\/pre>\n<h3 id=\"%e8%a8%ad%e7%bd%ae%e5%ae%9a%e6%99%82%e5%99%a8-hHWyGNrVXh\">\u8a2d\u7f6e\u5b9a\u6642\u5668<\/h3>\n<p>\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u9700\u8981\u5275\u5efa\u4e00\u500b<code>Timer<\/code>\u5be6\u4f8b\uff0c\u4e26\u5b89\u6392\u6211\u5011\u7684<code>TimerTask<\/code>\u5728\u6307\u5b9a\u7684\u6642\u9593\u9593\u9694\u5167\u57f7\u884c\uff1a<\/p>\n<pre><code>public class Main {\n    public static void main(String[] args) {\n        Timer timer = new Timer();\n        DatabaseUpdater updater = new DatabaseUpdater();\n        \n        \/\/ \u6bcf\u5c0f\u6642\u57f7\u884c\u4e00\u6b21\n        timer.schedule(updater, 0, 3600000);\n    }\n}\n<\/code><\/pre>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5%e8%88%87%e6%9b%b4%e6%96%b0-hHWyGNrVXh\">\u6578\u64da\u5eab\u9023\u63a5\u8207\u66f4\u65b0<\/h2>\n<p>\u5728<code>updateDatabase<\/code>\u65b9\u6cd5\u4e2d\uff0c\u6211\u5011\u9700\u8981\u4f7f\u7528JDBC\u4f86\u9023\u63a5\u6578\u64da\u5eab\u4e26\u57f7\u884c\u66f4\u65b0\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u9023\u63a5\u5230MySQL\u6578\u64da\u5eab\u4e26\u57f7\u884c\u66f4\u65b0\uff1a<\/p>\n<pre><code>import java.sql.Connection;\nimport java.sql.DriverManager;\nimport java.sql.PreparedStatement;\n\nprivate void updateDatabase() {\n    String url = \"jdbc:mysql:\/\/localhost:3306\/your_database\";\n    String user = \"your_username\";\n    String password = \"your_password\";\n\n    try (Connection conn = DriverManager.getConnection(url, user, password)) {\n        String sql = \"UPDATE your_table SET your_column = ? WHERE condition_column = ?\";\n        try (PreparedStatement pstmt = conn.prepareStatement(sql)) {\n            pstmt.setString(1, \"new_value\");\n            pstmt.setString(2, \"condition_value\");\n            pstmt.executeUpdate();\n            System.out.println(\"Database updated successfully.\");\n        }\n    } catch (Exception e) {\n        e.printStackTrace();\n    }\n}\n<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-hHWyGNrVXh\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u78ba\u4fdd\u5b9a\u6642\u5668\u7684\u57f7\u884c\u4e0d\u6703\u5f71\u97ff\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u9ad8\u8ca0\u8f09\u7684\u60c5\u6cc1\u4e0b\u3002<\/li>\n<li>\u8003\u616e\u4f7f\u7528\u591a\u7dda\u7a0b\u4f86\u8655\u7406\u6578\u64da\u5eab\u64cd\u4f5c\uff0c\u4ee5\u907f\u514d\u963b\u585e\u4e3b\u7dda\u7a0b\u3002<\/li>\n<li>\u5b9a\u671f\u6aa2\u67e5\u6578\u64da\u5eab\u9023\u63a5\u7684\u6709\u6548\u6027\uff0c\u4e26\u8655\u7406\u53ef\u80fd\u51fa\u73fe\u7684\u7570\u5e38\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-hHWyGNrVXh\">\u7e3d\u7d50<\/h2>\n<p>\u4f7f\u7528Java\u5b9a\u6642\u5668\u4f86\u5be6\u73fe\u6578\u64da\u5eab\u6578\u64da\u7684\u81ea\u52d5\u66f4\u65b0\u662f\u4e00\u500b\u7c21\u55ae\u800c\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u901a\u904e\u5408\u7406\u8a2d\u7f6e\u5b9a\u6642\u4efb\u52d9\u548c\u6578\u64da\u5eab\u9023\u63a5\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u5be6\u73fe\u5b9a\u671f\u66f4\u65b0\u7684\u9700\u6c42\u3002\u9019\u7a2e\u65b9\u6cd5\u4e0d\u50c5\u63d0\u9ad8\u4e86\u6578\u64da\u7684\u53ca\u6642\u6027\uff0c\u9084\u6e1b\u5c11\u4e86\u4eba\u5de5\u5e72\u9810\u7684\u9700\u8981\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684Java\u61c9\u7528\u7a0b\u5e8f\uff0cServer.HK\u63d0\u4f9b\u4e86\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\uff0c\u5e6b\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u548c\u90e8\u7f72\u60a8\u7684\u61c9\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u7528Java\u5b9a\u6642\u5668\u81ea\u52d5\u66f4\u65b0\u6578\u64da\u5eab\u6578\u64da\uff0c\u5be6\u73fe\u5b9a\u6642\u4fee\u6539\u548c\u7dad\u8b77\u6578\u64da\u7684\u9ad8\u6548\u89e3\u6c7a\u65b9\u6848\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-183746","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/183746","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=183746"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/183746\/revisions"}],"predecessor-version":[{"id":183747,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/183746\/revisions\/183747"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=183746"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=183746"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=183746"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}