{"id":16476,"date":"2024-11-05T10:51:24","date_gmt":"2024-11-05T02:51:24","guid":{"rendered":"https:\/\/92it.top\/?p=16476"},"modified":"2024-11-05T10:51:24","modified_gmt":"2024-11-05T02:51:24","slug":"%e4%bb%80%e4%b9%88%e6%98%af%e5%88%86%e5%b8%83%e5%bc%8f%e7%b3%bb%e7%bb%9f%e4%b8%ad%e7%9a%84%e5%b9%82%e7%ad%89%e6%80%a7%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=16476","title":{"rendered":"\u4ec0\u4e48\u662f\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u7684\u5e42\u7b49\u6027\uff1f"},"content":{"rendered":"\n<p>\u8f6c\u8f7d\uff1a<a href=\"https:\/\/mp.weixin.qq.com\/s?__biz=MzIwNDAyOTI2Nw==&amp;mid=2247500214&amp;idx=1&amp;sn=3612c8ff2dfed7e14ccc5f4844139f33&amp;chksm=96c4ed8aa1b3649cbf2e7edff81b18dffb1bb419ed6e9c8d33bca8fb09651a32d9d8b04ac7f4&amp;cur_album_id=2818595943724974083&amp;scene=190#rd\">\u4ec0\u4e48\u662f\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u7684\u5e42\u7b49\u6027\uff1f<\/a><\/p>\n\n\n\n<p>\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u7684\u5e42\u7b49\u6027\u662f\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5728\u7cfb\u7edf\u8bbe\u8ba1\u548c\u64cd\u4f5c\u4e2d\u8d77\u7740\u5173\u952e\u4f5c\u7528\u3002\u90a3\u4e48\uff0c\u4ec0\u4e48\u662f\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u5e42\u7b49\u6027\uff1f\u6211\u4eec\u8be5\u5982\u4f55\u4f7f\u7528\u5b83\uff1f\u8fd9\u7bc7\u6587\u7ae0\u6211\u4eec\u6765\u804a\u4e00\u804a\u3002<\/p>\n\n\n\n<p><strong>\u4ec0\u4e48\u662f\u5e42\u7b49\u6027\uff1f<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u5728\u6570\u5b66\u4e2d\uff0c\u5982\u679c\u591a\u6b21\u5e94\u7528\u4e00\u4e2a\u64cd\u4f5c\u4ea7\u751f\u7684\u7ed3\u679c\u4e0e\u5e94\u7528\u4e00\u6b21\u76f8\u540c\uff0c\u90a3\u4e48\u8fd9\u4e2a\u64cd\u4f5c\u5c31\u662f\u5e42\u7b49\u7684\u3002\u6bd4\u5982\uff0c\u7edd\u5bf9\u503c\u51fd\u6570\u662f\u5e42\u7b49\u7684\uff1a||-8|| = |-8| = 8\u3002<\/p>\n\n\n\n<p>\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u5e42\u7b49\u6027\uff08Idempotency\uff09\u6e90\u81ea\u6570\u5b66\u4e2d\u7684\u6982\u5ff5\uff0c\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u5e42\u7b49\u6027\u901a\u5e38\u6307\u4e00\u4e2a\u64cd\u4f5c\u53ef\u4ee5\u88ab\u91cd\u590d\u6267\u884c\u4e00\u6b21\u6216\u591a\u6b21\uff0c\u4f46\u7ed3\u679c\u603b\u662f\u76f8\u540c\uff0c\u4e0d\u4f1a\u9020\u6210\u7cfb\u7edf\u72b6\u6001\u53d1\u751f\u975e\u9884\u671f\u7684\u6539\u53d8\u3002\u8fd9\u610f\u5473\u7740\uff0c\u5728\u53d1\u751f\u7f51\u7edc\u5931\u8d25\u3001\u8d85\u65f6\u6216\u5176\u4ed6\u9519\u8bef\u65f6\uff0c\u5ba2\u6237\u7aef\u53ef\u4ee5\u5b89\u5168\u5730\u91cd\u8bd5\u8bf7\u6c42\u800c\u4e0d\u5fc5\u62c5\u5fc3\u6076\u5316\u9519\u8bef\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u5047\u8bbe\u4e00\u4e2a\u64cd\u4f5c\u662f\u6263\u51cf\u5e93\u5b58\uff0c\u5982\u679c\u8be5\u64cd\u4f5c\u662f\u5e42\u7b49\u7684\uff0c\u90a3\u4e48\u65e0\u8bba\u91cd\u590d\u6267\u884c\u591a\u5c11\u6b21\uff0c\u6bcf\u6b21\u6267\u884c\u7684\u7ed3\u679c\u90fd\u662f\u4e00\u6837\u7684\uff1a\u5e93\u5b58\u88ab\u6263\u51cf\u4e00\u6b21\uff0c\u800c\u4e0d\u662f\u591a\u6b21\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u5728\u64cd\u4f5c\u4e2d\u589e\u52a0\u68c0\u67e5\u673a\u5236\u6765\u5b9e\u73b0\uff0c\u6bd4\u5982\u5728\u6267\u884c\u51cf\u5e93\u5b58\u64cd\u4f5c\u4e4b\u524d\uff0c\u68c0\u67e5\u5e93\u5b58\u662f\u5426\u5df2\u7ecf\u88ab\u6263\u51cf\u8fc7\u3002<\/p>\n\n\n\n<p>\u4e3a\u4e86\u66f4\u597d\u5730\u7406\u89e3\u5e42\u7b49\u6027\uff0c\u6211\u4eec\u4ee5\u5b9e\u73b0\u4e00\u4e2a\u7b80\u5355\u7684\u652f\u4ed8\u7cfb\u7edf\u4e3a\u4f8b\u6765\u8bf4\u660e\uff1a\u8be5\u7cfb\u7edf\u8981\u786e\u4fdd\u5373\u4f7f\u540c\u4e00\u4e2a\u652f\u4ed8\u8bf7\u6c42\u88ab\u591a\u6b21\u53d1\u9001\uff0c\u7528\u6237\u4e5f\u4e0d\u4f1a\u88ab\u91cd\u590d\u6263\u6b3e\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import java.util.HashMap;\nimport java.util.Map;\n\nclass PaymentService {\n    \/\/ \u6a21\u62df\u5b58\u50a8\u5df2\u5904\u7406\u8fc7\u7684\u652f\u4ed8\u8bf7\u6c42\n    private Map&lt;String, Boolean> processedPayments = new HashMap&lt;>();\n\n    \/**\n     * \u5904\u7406\u652f\u4ed8\n     * @param userId \u7528\u6237ID\n     * @param amount \u652f\u4ed8\u91d1\u989d\n     * @param idempotencyKey \u5e42\u7b49\u6027\u952e\n     * @return \u652f\u4ed8\u7ed3\u679c\n     *\/\n    public String processPayment(String userId, double amount, String idempotencyKey) {\n        \/\/ \u68c0\u67e5\u8be5\u5e42\u7b49\u6027\u952e\u662f\u5426\u5df2\u7ecf\u5904\u7406\u8fc7\n        if (processedPayments.containsKey(idempotencyKey)) {\n            return \"Payment already processed.\";\n        }\n\n        \/\/ \u6267\u884c\u652f\u4ed8\u903b\u8f91\n        boolean success = executePayment(userId, amount);\n\n        if (success) {\n            \/\/ \u6807\u8bb0\u8be5\u5e42\u7b49\u6027\u952e\u5df2\u5904\u7406\n            processedPayments.put(idempotencyKey, true);\n            return \"Payment successful.\";\n        } else {\n            return \"Payment failed.\";\n        }\n    }\n\n    \/**\n     * \u6a21\u62df\u5b9e\u9645\u652f\u4ed8\u903b\u8f91\u7684\u65b9\u6cd5\n     * @param userId \u7528\u6237ID\n     * @param amount \u652f\u4ed8\u91d1\u989d\n     * @return \u652f\u4ed8\u662f\u5426\u6210\u529f\n     *\/\n    private boolean executePayment(String userId, double amount) {\n        \/\/ \u5728\u771f\u5b9e\u573a\u666f\u4e2d\uff0c\u8fd9\u91cc\u4f1a\u8c03\u7528\u652f\u4ed8\u7f51\u5173API\u6216\u5176\u4ed6\u652f\u4ed8\u5904\u7406\u903b\u8f91\n        \/\/ \u7b80\u5355\u8d77\u89c1\uff0c\u6211\u4eec\u5047\u8bbe\u652f\u4ed8\u603b\u662f\u6210\u529f\n        System.out.println(\"Executing payment of \" + amount + \" for user: \" + userId);\n        return true;\n    }\n\n    public static void main(String[] args) {\n        PaymentService paymentService = new PaymentService();\n        String userId = \"yuanjava\";\n        double amount = 1000.0;\n        String idempotencyKey = \"unique-payment-id-001\";\n\n        \/\/ \u7b2c\u4e00\u6b21\u652f\u4ed8\u8bf7\u6c42\n        System.out.println(paymentService.processPayment(userId, amount, idempotencyKey));\n\n        \/\/ \u91cd\u590d\u7684\u652f\u4ed8\u8bf7\u6c42\uff0c\u5047\u8bbe\u7531\u4e8e\u7f51\u7edc\u6545\u969c\u7b49\u539f\u56e0\u7528\u6237\u91cd\u65b0\u63d0\u4ea4\n        System.out.println(paymentService.processPayment(userId, amount, idempotencyKey));\n    }\n}<\/pre>\n\n\n\n<p><strong>\u4ee3\u7801\u8bf4\u660e\uff1a<\/strong><\/p>\n\n\n\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c<code>idempotencyKey<\/code>\uff08\u5e42\u7b49\u6027\u952e\uff09\u7528\u4e8e\u6807\u8bc6\u6bcf\u4e00\u4e2a\u652f\u4ed8\u8bf7\u6c42\uff0c\u5982\u679c\u4f7f\u7528\u540c\u4e00\u4e2a\u952e\u53d1\u9001\u8bf7\u6c42\uff0c\u7cfb\u7edf\u4f1a\u68c0\u67e5\u8fd9\u4e2a\u8bf7\u6c42\u662f\u5426\u5df2\u7ecf\u5904\u7406\u8fc7\u3002\u901a\u8fc7\u4f7f\u7528\u4e00\u4e2a<code>HashMap<\/code>\u6765\u5b58\u50a8\u5df2\u5904\u7406\u7684\u5e42\u7b49\u6027\u952e\uff0c\u6211\u4eec\u53ef\u4ee5\u786e\u4fdd\u6bcf\u4e2a\u8bf7\u6c42\u53ea\u5904\u7406\u4e00\u6b21\uff0c\u5373\u4f7f\u5ba2\u6237\u7aef\u56e0\u4e3a\u7f51\u7edc\u95ee\u9898\u6216\u8005\u5176\u4ed6\u539f\u56e0\u91cd\u590d\u53d1\u9001\u8bf7\u6c42\u3002<\/p>\n\n\n\n<ol>\n<li><strong>processedPayments<\/strong>\uff1a\u8fd9\u662f\u4e00\u4e2a<code>HashMap<\/code>\uff0c\u7528\u4e8e\u8bb0\u5f55\u5df2\u7ecf\u5904\u7406\u8fc7\u7684\u652f\u4ed8\u8bf7\u6c42\u7684\u5e42\u7b49\u6027\u952e\u3002<\/li>\n\n\n\n<li><strong>processPayment<\/strong>\uff1a\u63a5\u53d7<code>userId<\/code>\u3001<code>amount<\/code>\u548c<code>idempotencyKey<\/code>\u4f5c\u4e3a\u53c2\u6570\u3002\u9996\u5148\u68c0\u67e5\u8be5\u5e42\u7b49\u6027\u952e\u662f\u5426\u5df2\u7ecf\u5b58\u5728\u4e8e<code>processedPayments<\/code>\u4e2d\uff0c\u5982\u679c\u5b58\u5728\u5219\u8fd4\u56de\u4e00\u4e2a\u5b57\u7b26\u4e32\u8868\u793a\u8be5\u652f\u4ed8\u5df2\u7ecf\u5904\u7406\u8fc7\u3002\u5426\u5219\uff0c\u6267\u884c\u652f\u4ed8\u903b\u8f91\uff0c\u5e76\u5728\u6210\u529f\u540e\u8bb0\u5f55\u8be5\u5e42\u7b49\u6027\u952e\u3002<\/li>\n\n\n\n<li><strong>executePayment<\/strong>\uff1a\u6a21\u62df\u652f\u4ed8\u5904\u7406\u7684\u7b80\u5355\u65b9\u6cd5\u3002\u8fd9\u91cc\u4f60\u53ef\u4ee5\u96c6\u6210\u5b9e\u9645\u7684\u652f\u4ed8\u7f51\u5173\u903b\u8f91\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u901a\u8fc7\u8be5\u793a\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u5373\u4f7f\u7528\u6237\u7531\u4e8e\u9875\u9762\u5237\u65b0\u6216\u7f51\u7edc\u95ee\u9898\u91cd\u590d\u63d0\u4ea4\u4e86\u540c\u6837\u7684\u652f\u4ed8\u8bf7\u6c42\uff0c\u56e0\u4e3a\u4f7f\u7528\u4e86\u5e42\u7b49\u6027\u952e\uff0c\u7cfb\u7edf\u53ea\u4f1a\u6267\u884c\u4e00\u6b21\u771f\u5b9e\u7684\u652f\u4ed8\u6263\u6b3e\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p><strong>\u5e42\u7b49\u6027\u7684\u91cd\u8981\u6027<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator 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