{"id":270,"date":"2026-07-18T15:46:18","date_gmt":"2026-07-18T07:46:18","guid":{"rendered":"http:\/\/ssjava.xyz\/index.php\/2026\/07\/19\/%e5%a4%9a%e6%80%81%e7%9a%84%e5%ba%94%e7%94%a8%ef%bc%9a%e5%8f%82%e6%95%b0%e5%a4%9a%e6%80%81%e5%8c%96%e3%80%81%e5%b7%a5%e5%8e%82%e6%a8%a1%e5%bc%8f%e4%b8%8e%e6%94%af%e4%bb%98%e7%b3%bb%e7%bb%9f%e5%ae%9e\/"},"modified":"2026-07-19T11:31:00","modified_gmt":"2026-07-19T03:31:00","slug":"19-%e5%a4%9a%e6%80%81%e7%9a%84%e5%ba%94%e7%94%a8%ef%bc%9a%e5%8f%82%e6%95%b0%e5%a4%9a%e6%80%81%e5%8c%96%e3%80%81%e5%b7%a5%e5%8e%82%e6%a8%a1%e5%bc%8f%e4%b8%8e%e6%94%af%e4%bb%98%e7%b3%bb%e7%bb%9f","status":"publish","type":"post","link":"https:\/\/ssjava.xyz\/index.php\/2026\/07\/18\/19-%e5%a4%9a%e6%80%81%e7%9a%84%e5%ba%94%e7%94%a8%ef%bc%9a%e5%8f%82%e6%95%b0%e5%a4%9a%e6%80%81%e5%8c%96%e3%80%81%e5%b7%a5%e5%8e%82%e6%a8%a1%e5%bc%8f%e4%b8%8e%e6%94%af%e4%bb%98%e7%b3%bb%e7%bb%9f\/","title":{"rendered":"19. \u591a\u6001\u7684\u5e94\u7528\uff1a\u53c2\u6570\u591a\u6001\u5316\u3001\u5de5\u5382\u6a21\u5f0f\u4e0e\u652f\u4ed8\u7cfb\u7edf\u5b9e\u6218"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u4e0a\u4e00\u7bc7\u6211\u4eec\u62c6\u89e3\u4e86\u591a\u6001\u7684\u5e95\u5c42\u673a\u5236\u2014\u2014\u52a8\u6001\u7ed1\u5b9a\u3001\u5411\u4e0a\u8f6c\u578b\u3001\u5411\u4e0b\u8f6c\u578b\u3001\u7f16\u8bd1\u65f6\u7c7b\u578b vs \u8fd0\u884c\u65f6\u7c7b\u578b\u3002\u638c\u63e1\u4e86\u8fd9\u4e9b\u57fa\u672c\u529f\uff0c\u8fd9\u7bc7\u5c31\u8be5\u770b\u770b\u771f\u6b63\u7684\u5de5\u7a0b\u7ea7\u5e94\u7528\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8001\u5b9e\u8bf4\uff0c\u5982\u679c\u4f60\u53ea\u662f\u5b66\u8bed\u6cd5\uff0c\u591a\u6001\u4f3c\u4e4e\u6ca1\u4ec0\u4e48\u4e86\u4e0d\u8d77\u7684\u3002\u4f46\u5230\u4e86\u5b9e\u9645\u9879\u76ee\u4e2d\uff0c<strong>\u591a\u6001\u662f\u8ba9\u4f60\u7684\u4ee3\u7801\u4ece\u300c\u80fd\u8dd1\u300d\u53d8\u6210\u300c\u597d\u6539\u300d\u7684\u5173\u952e\u4e4b\u4e00\u3002<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u53c2\u6570\u591a\u6001\u5316\u2014\u2014\u5199\u4e00\u4e2a\u901a\u7528\u7684\u65b9\u6cd5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u591a\u6001\u6700\u5e38\u89c1\u7684\u7528\u6cd5\u5c31\u662f\u5199\u4e00\u4e2a\u53c2\u6570\u4e3a\u7236\u7c7b\u7c7b\u578b\u7684\u65b9\u6cd5\uff0c\u8c03\u7528\u65f6\u53ef\u4ee5\u4f20\u4efb\u610f\u5b50\u7c7b\u5bf9\u8c61\u3002\u8fd9\u662f\u300c\u9762\u5411\u63a5\u53e3\u7f16\u7a0b\u300d\u7684\u57fa\u7840\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1.1 \u573a\u666f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5047\u8bbe\u4f60\u6709\u4e00\u4e2a\u52a8\u7269\u56ed\u7cfb\u7edf\uff0c\u8981\u7ed9\u6240\u6709\u52a8\u7269\u5582\u98df\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u4e0d\u7528\u591a\u6001\u2014\u2014\u786c\u4f24\npublic void feedDog(Dog dog) { \/* \u5582\u72d7 *\/ }\npublic void feedCat(Cat cat) { \/* \u5582\u732b *\/ }\npublic void feedBird(Bird bird) { \/* \u5582\u9e1f *\/ }\n\/\/ ...\u65b0\u589e\u4e00\u79cd\u52a8\u7269\uff0c\u5c31\u8981\u591a\u5199\u4e00\u4e2a\u65b9\u6cd5<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u7528\u591a\u6001\u2014\u2014\u4f18\u96c5\npublic void feed(Animal animal) {\n    animal.eat();            \/\/ \u4e0d\u7ba1\u662f\u4ec0\u4e48\u52a8\u7269\uff0c\u90fd\u6267\u884c eat()\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e24\u79cd\u65b9\u6848\u7684\u5dee\u8ddd\u4e0d\u4ec5\u4ec5\u662f\u4ee3\u7801\u91cf\u3002\u591a\u6001\u7684\u7248\u672c\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65b0\u589e\u52a8\u7269\u65f6\uff0c\u4e0d\u9700\u8981\u6539 <code>feed()<\/code> \u65b9\u6cd5<\/li>\n\n\n<li>\u8c03\u7528\u65b9\u53ea\u9700\u77e5\u9053 <code>Animal<\/code> \u7c7b\u578b\uff0c\u4e0d\u9700\u8981\u5173\u5fc3\u5177\u4f53\u5b50\u7c7b<\/li>\n\n\n<li>\u65b9\u6cd5\u7684\u91cd\u7528\u6027\u8fbe\u5230\u4e86\u6700\u5927<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">1.2 \u7ecf\u5178\u6848\u4f8b\uff1a\u6392\u5e8f\u4e0e\u6bd4\u8f83\u5668<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Java \u6807\u51c6\u5e93\u4e2d\u6700\u5e38\u89c1\u7684\u53c2\u6570\u591a\u6001\u5c31\u662f <code>Collections.sort()<\/code>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>List numbers = Arrays.asList(3, 1, 4, 1, 5);\nCollections.sort(numbers);                            \/\/ \u9ed8\u8ba4\u5347\u5e8f\n\n\/\/ \u4f20\u4e00\u4e2a Comparator \u63a5\u53e3\u7684\u5b9e\u73b0\uff0c\u6539\u53d8\u6392\u5e8f\u884c\u4e3a\nCollections.sort(numbers, (a, b) -&gt; b - a);             \/\/ \u964d\u5e8f\n\n\/\/ \u81ea\u5b9a\u4e49\u5bf9\u8c61\u7684\u6392\u5e8f\uff0c\u4e5f\u9760\u591a\u6001\nCollections.sort(students, new Comparator&lt;Student&gt;() {\n    @Override\n    public int compare(Student s1, Student s2) {\n        return s1.getScore() - s2.getScore();\n    }\n});<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><code>Collections.sort()<\/code> \u63a5\u53d7 <code>List<\/code> \u548c <code>Comparator<\/code> \u4e24\u4e2a\u63a5\u53e3\u7c7b\u578b\u7684\u53c2\u6570\u3002\u4e0d\u7ba1\u4f60\u4f20\u4ec0\u4e48\u7c7b\u578b\u7684\u6570\u636e\u3001\u4ec0\u4e48\u89c4\u5219\u7684\u6bd4\u8f83\u5668\uff0c<code>sort<\/code> \u65b9\u6cd5\u90fd\u80fd\u5904\u7406\u2014\u2014\u8fd9\u5c31\u662f\u591a\u6001\u7684\u4ef7\u503c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001\u8fd4\u56de\u7c7b\u578b\u591a\u6001\u2014\u2014\u5de5\u5382\u65b9\u6cd5\u6a21\u5f0f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u591a\u6001\u4e0d\u53ea\u4f53\u73b0\u5728\u53c2\u6570\u4e0a\uff0c\u8fd4\u56de\u503c\u4e5f\u4e00\u6837\u3002\u4f60\u53ef\u4ee5\u58f0\u660e\u8fd4\u56de\u4e00\u4e2a\u7236\u7c7b\u7c7b\u578b\uff0c\u4f46\u5b9e\u9645\u8fd4\u56de\u7684\u662f\u5b50\u7c7b\u5bf9\u8c61\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u7b80\u5355\u7684\u5de5\u5382\u6a21\u5f0f\npublic class AnimalFactory {\n    public static Animal createAnimal(String type) {\n        switch (type) {\n            case \"dog\":  return new Dog();\n            case \"cat\":  return new Cat();\n            case \"bird\": return new Bird();\n            default:     throw new IllegalArgumentException(\"\u672a\u77e5\u52a8\u7269\u7c7b\u578b\");\n        }\n    }\n}\n\n\/\/ \u8c03\u7528\u65b9\u5b8c\u5168\u4e0d\u9700\u8981\u77e5\u9053\u5177\u4f53\u7c7b\u578b\nAnimal a = AnimalFactory.createAnimal(\"dog\");\na.makeSound();   \/\/ \u591a\u6001\u8c03\u7528\u7684\u8fd8\u662f Dog \u7684 makeSound()<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u5de5\u5382\u6a21\u5f0f\u7684\u6838\u5fc3\u2014\u2014\u8c03\u7528\u65b9\u53ea\u548c\u7236\u7c7b\uff08\u63a5\u53e3\uff09\u6253\u4ea4\u9053\uff0c\u521b\u5efa\u903b\u8f91\u88ab\u5c01\u88c5\u5728\u5de5\u5382\u5185\u90e8\u3002\u65b0\u589e\u52a8\u7269\u7c7b\u578b\u53ea\u9700\u8981\u6269\u5c55\u5b50\u7c7b\uff0c\u8c03\u7528\u65b9\u4ee3\u7801\u4e0d\u52a8\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001\u591a\u6001\u6570\u7ec4\u2014\u2014\u7edf\u4e00\u7ba1\u7406\u4e0d\u540c\u5b50\u7c7b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u591a\u6001\u8ba9\u6570\u7ec4\u53ef\u4ee5\u5b58\u653e\u4e0d\u540c\u7c7b\u578b\u7684\u5bf9\u8c61\uff0c\u53ea\u8981\u5b83\u4eec\u6709\u5171\u540c\u7684\u7236\u7c7b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Animal[] zoo = new Animal[3];\nzoo[0] = new Dog(\"\u65fa\u8d22\", 3);\nzoo[1] = new Cat(\"\u54aa\u54aa\", 2);\nzoo[2] = new Bird(\"\u557e\u557e\", 1);\n\n\/\/ \u7edf\u4e00\u904d\u5386\uff0c\u4e0d\u9700\u8981\u77e5\u9053\u6bcf\u4e2a\u5143\u7d20\u7684\u5177\u4f53\u7c7b\u578b\nfor (Animal animal : zoo) {\n    animal.makeSound();    \/\/ \u6bcf\u4e2a\u90fd\u8c03\u7528\u81ea\u5df1\u7684\u7248\u672c\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6709\u6ca1\u6709\u89c9\u5f97\u5f88\u773c\u719f\uff1f\u6ca1\u9519\uff0c<code>ArrayList<\/code> \u5185\u90e8\u5c31\u662f\u7ef4\u62a4\u4e86\u4e00\u4e2a <code>Object[]<\/code> \u6570\u7ec4\u2014\u2014\u6240\u6709\u7c7b\u90fd\u662f <code>Object<\/code> \u7684\u5b50\u7c7b\uff0c\u6240\u4ee5 <code>ArrayList<\/code> \u80fd\u5b58\u4efb\u4f55\u7c7b\u578b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001\u5b9e\u6218\u6848\u4f8b\uff1a\u652f\u4ed8\u7cfb\u7edf<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6765\u505a\u4e00\u4e2a\u66f4\u8d34\u8fd1\u771f\u5b9e\u5f00\u53d1\u7684\u6848\u4f8b\u2014\u2014\u652f\u4ed8\u7cfb\u7edf\u3002\u4f60\u8981\u8bbe\u8ba1\u4e00\u4e2a\u652f\u6301\u591a\u79cd\u652f\u4ed8\u65b9\u5f0f\u7684\u7cfb\u7edf\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ 1. \u5b9a\u4e49\u62bd\u8c61\u7684\u652f\u4ed8\u80fd\u529b\nabstract class Payment {\n    protected String orderId;\n    protected double amount;\n\n    public Payment(String orderId, double amount) {\n        this.orderId = orderId;\n        this.amount = amount;\n    }\n\n    \/\/ \u6838\u5fc3\u62bd\u8c61\u65b9\u6cd5\u2014\u2014\u6bcf\u79cd\u652f\u4ed8\u65b9\u5f0f\u81ea\u5df1\u5b9e\u73b0\n    public abstract boolean pay();\n\n    \/\/ \u901a\u7528\u7684\u652f\u4ed8\u65e5\u5fd7\n    public void logPayment() {\n        System.out.println(\"[\" + getClass().getSimpleName() + \"] \" +\n            \"\u8ba2\u5355: \" + orderId + \", \u91d1\u989d: \" + amount);\n    }\n}\n\n\/\/ 2. \u5404\u652f\u4ed8\u65b9\u5f0f\nclass WechatPay extends Payment {\n    public WechatPay(String orderId, double amount) {\n        super(orderId, amount);\n    }\n    @Override\n    public boolean pay() {\n        logPayment();\n        System.out.println(\"\u8c03\u7528\u5fae\u4fe1\u652f\u4ed8 SDK... \u652f\u4ed8\u6210\u529f\");\n        return true;\n    }\n}\n\nclass Alipay extends Payment {\n    public Alipay(String orderId, double amount) {\n        super(orderId, amount);\n    }\n    @Override\n    public boolean pay() {\n        logPayment();\n        System.out.println(\"\u8c03\u7528\u652f\u4ed8\u5b9d SDK... \u652f\u4ed8\u6210\u529f\");\n        return true;\n    }\n}\n\nclass CreditCardPay extends Payment {\n    public CreditCardPay(String orderId, double amount) {\n        super(orderId, amount);\n    }\n    @Override\n    public boolean pay() {\n        logPayment();\n        System.out.println(\"\u8c03\u7528\u4fe1\u7528\u5361\u7f51\u5173... \u652f\u4ed8\u6210\u529f\");\n        return true;\n    }\n}\n\n\/\/ 3. \u652f\u4ed8\u5904\u7406\u670d\u52a1\nclass PaymentService {\n    public void processPayment(Payment payment) {\n        \/\/ \u7edf\u4e00\u5904\u7406\u2014\u2014\u4e0d\u7ba1\u4ec0\u4e48\u652f\u4ed8\u65b9\u5f0f\uff0c\u90fd\u8d70\u8fd9\u91cc\n        System.out.println(\"=== \u5f00\u59cb\u5904\u7406\u8ba2\u5355 \" + payment.orderId + \" ===\");\n        boolean success = payment.pay();    \/\/ \u591a\u6001\u8c03\u7528\n        if (success) {\n            System.out.println(\"\u652f\u4ed8\u5b8c\u6210\uff0c\u53d1\u9001\u901a\u77e5...\");\n        } else {\n            System.out.println(\"\u652f\u4ed8\u5931\u8d25\uff0c\u8bb0\u5f55\u5f02\u5e38...\");\n        }\n    }\n}\n\n\/\/ 4. \u6d4b\u8bd5\npublic class PaymentDemo {\n    public static void main(String[] args) {\n        PaymentService service = new PaymentService();\n\n        \/\/ \u5de5\u5382\u914d\u5408\u8c03\u7528\u2014\u2014\u8c03\u7528\u65b9\u5b8c\u5168\u4e0d\u77e5\u9053\u5177\u4f53\u5b9e\u73b0\n        Payment[] payments = {\n            new WechatPay(\"WX001\", 99.9),\n            new Alipay(\"ALI001\", 199.0),\n            new CreditCardPay(\"CC001\", 999.0)\n        };\n\n        for (Payment p : payments) {\n            service.processPayment(p);    \/\/ \u591a\u6001\n        }\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\u4f60\u770b\u5230\u7684\u5173\u952e\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>PaymentService.processPayment()<\/code> \u7684\u53c2\u6570\u662f\u62bd\u8c61\u7c7b <code>Payment<\/code>\uff0c\u4f20\u4ec0\u4e48\u5b50\u7c7b\u8fdb\u6765\u90fd\u884c<\/li>\n\n\n<li>\u65b0\u589e\u4e00\u79cd\u652f\u4ed8\u65b9\u5f0f\uff08\u6bd4\u5982 Apple Pay\uff09\uff0c\u4e0d\u9700\u8981\u6539 <code>PaymentService<\/code> \u7684\u4efb\u4f55\u4ee3\u7801\u2014\u2014\u53ea\u9700\u65b0\u589e\u4e00\u4e2a\u5b50\u7c7b<\/li>\n\n\n<li><code>logPayment()<\/code> \u5728\u62bd\u8c61\u7c7b\u91cc\u5b9a\u4e49\uff0c\u6240\u6709\u5b50\u7c7b\u590d\u7528\u8fd9\u4e2a\u901a\u7528\u903b\u8f91<\/li>\n\n\n<li><code>getClass().getSimpleName()<\/code> \u83b7\u53d6\u7684\u662f\u5b9e\u9645\u8fd0\u884c\u65f6\u7c7b\u578b\u7684\u7b80\u5355\u7c7b\u540d\uff0c\u4e0d\u662f\u58f0\u660e\u7c7b\u578b\u2014\u2014\u8fd9\u4e5f\u662f\u52a8\u6001\u7ed1\u5b9a\u7684\u4f53\u73b0<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e94\u3001\u591a\u6001\u4e0e\u8bbe\u8ba1\u539f\u5219<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u591a\u6001\u4e0d\u53ea\u662f\u4e00\u79cd\u8bed\u6cd5\uff0c\u5b83\u80cc\u540e\u7ad9\u7740\u4e00\u6761\u91cd\u8981\u7684\u8bbe\u8ba1\u539f\u5219\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>\u5f00\u95ed\u539f\u5219\uff08Open-Closed Principle\uff09<\/strong>\uff1a\u5bf9\u6269\u5c55\u5f00\u653e\uff0c\u5bf9\u4fee\u6539\u5173\u95ed\u3002<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ec0\u4e48\u610f\u601d\u5462\uff1f\u5c31\u662f\u7cfb\u7edf\u5e94\u8be5\u5141\u8bb8\u4f60\u5728\u4e0d\u4fee\u6539\u5df2\u6709\u4ee3\u7801\u7684\u524d\u63d0\u4e0b\uff0c\u6dfb\u52a0\u65b0\u529f\u80fd\u3002\u591a\u6001\u662f\u5b9e\u73b0\u8fd9\u4e2a\u539f\u5219\u7684\u4e3b\u8981\u624b\u6bb5\u4e4b\u4e00\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56de\u5934\u770b\u652f\u4ed8\u7cfb\u7edf\u7684\u4f8b\u5b50\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65b0\u589e Apple Pay \u2192 \u5199\u4e00\u4e2a <code>ApplePay extends Payment<\/code> \u2192 \u5df2\u6709\u7684 <code>PaymentService<\/code> \u4e00\u884c\u4e0d\u7528\u6539<\/li>\n\n\n<li>\u8fd9\u5c31\u662f\u300c<strong>\u5bf9\u6269\u5c55\u5f00\u653e<\/strong>\u300d\uff1a\u968f\u65f6\u53ef\u4ee5\u65b0\u589e<\/li>\n\n\n<li>\u8fd9\u4e5f\u662f\u300c<strong>\u5bf9\u4fee\u6539\u5173\u95ed<\/strong>\u300d\uff1a\u5df2\u6709\u7684\u7a33\u5b9a\u4ee3\u7801\u4e0d\u52a8<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">5.1 \u591a\u6001 vs if-else<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f88\u591a\u4eba\u4e00\u5f00\u59cb\u5199\u4ee3\u7801\u4e60\u60ef\u7528 <code>if-else<\/code> \u6765\u505a\u7c7b\u578b\u5224\u65ad\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u591a\u6001\u4e4b\u524d\u2014\u2014\u4e11\u964b\u7684 if-else\npublic void processPayment(String type, String orderId, double amount) {\n    if (\"wechat\".equals(type)) {\n        \/\/ \u8c03\u7528\u5fae\u4fe1\u652f\u4ed8\n    } else if (\"alipay\".equals(type)) {\n        \/\/ \u8c03\u7528\u652f\u4ed8\u5b9d\u652f\u4ed8\n    } else if (\"creditcard\".equals(type)) {\n        \/\/ \u8c03\u7528\u4fe1\u7528\u5361\u652f\u4ed8\n    } else {\n        throw new RuntimeException(\"\u4e0d\u652f\u6301\u7684\u652f\u4ed8\u65b9\u5f0f\");\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6bb5\u4ee3\u7801\u7684\u95ee\u9898\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6bcf\u65b0\u589e\u4e00\u79cd\u652f\u4ed8\u65b9\u5f0f\uff0c\u5c31\u8981\u6539\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u52a0\u4e00\u4e2a <code>else if<\/code><\/li>\n\n\n<li>\u8fd9\u4e2a\u65b9\u6cd5\u7684\u4ee3\u7801\u4f1a\u8d8a\u6765\u8d8a\u957f\uff0c\u8d8a\u6765\u8d8a\u96be\u7ef4\u62a4<\/li>\n\n\n<li>\u6240\u6709\u652f\u4ed8\u65b9\u5f0f\u7684\u8c03\u7528\u903b\u8f91\u8026\u5408\u5728\u4e86\u540c\u4e00\u4e2a\u65b9\u6cd5\u91cc<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u7528\u591a\u6001\u91cd\u6784\u4e4b\u540e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6bcf\u79cd\u652f\u4ed8\u65b9\u5f0f\u6709\u81ea\u5df1\u7684\u7c7b\uff0c\u5404\u7ba1\u5404\u7684<\/li>\n\n\n<li>\u65b0\u589e\u652f\u4ed8\u65b9\u5f0f\u4e0d\u9700\u8981\u6539\u4efb\u4f55\u73b0\u6709\u4ee3\u7801<\/li>\n\n\n<li>\u8c03\u7528\u65b9\u7684\u4ee3\u7801\u6781\u5176\u7cbe\u7b80\u2014\u2014\u4e00\u884c <code>payment.pay()<\/code> \u641e\u5b9a\u4e00\u5207<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u7136\uff0c\u8fd9\u4e0d\u662f\u8bf4 <code>if-else<\/code> \u672c\u8eab\u662f\u4e07\u6076\u4e4b\u6e90\u3002\u5c0f\u89c4\u6a21\u548c\u7b80\u5355\u573a\u666f\u4e0b\uff0c<code>if-else<\/code> \u53cd\u800c\u66f4\u76f4\u89c2\u3002\u4f46\u5f53\u4e1a\u52a1\u903b\u8f91\u7684\u5206\u652f\u8d8a\u6765\u8d8a\u591a\u7684\u65f6\u5019\uff0c\u591a\u6001\u662f\u66f4\u4f18\u96c5\u7684\u89e3\u6cd5\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u516d\u3001\u603b\u7ed3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u524d\u540e\u4e24\u7bc7\uff0c\u6211\u4eec\u5b8c\u6574\u5730\u8d70\u8fc7\u4e86\u591a\u6001\u7684\u5e95\u5c42\u539f\u7406\u548c\u5de5\u7a0b\u5b9e\u8df5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u53c2\u6570\u591a\u6001\u5316<\/strong>\uff1a\u5199\u4e00\u4e2a\u5904\u7406\u7236\u7c7b\u7684\u65b9\u6cd5\uff0c\u5b50\u7c7b\u90fd\u80fd\u4f20<\/li>\n\n\n<li><strong>\u8fd4\u56de\u7c7b\u578b\u591a\u6001<\/strong>\uff1a\u5de5\u5382\u6a21\u5f0f\uff0c\u8c03\u7528\u65b9\u53ea\u8ddf\u7236\u7c7b\u6253\u4ea4\u9053<\/li>\n\n\n<li><strong>\u591a\u6001\u6570\u7ec4<\/strong>\uff1a\u7edf\u4e00\u7ba1\u7406\u548c\u904d\u5386\u4e0d\u540c\u5b50\u7c7b<\/li>\n\n\n<li><strong>\u5b9e\u6218\u6848\u4f8b<\/strong>\uff1a\u652f\u4ed8\u7cfb\u7edf\u2014\u2014\u62bd\u8c61\u7c7b\u8bbe\u8ba1\u3001\u5de5\u5382\u914d\u5408\u3001\u5f00\u95ed\u539f\u5219<\/li>\n\n\n<li><strong>\u591a\u6001\u7684\u54f2\u5b66<\/strong>\uff1a\u7528\u591a\u6001\u66ff\u4ee3 if-else\uff0c\u5bf9\u6269\u5c55\u5f00\u653e\u5bf9\u4fee\u6539\u5173\u95ed<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b66\u5b8c\u4e86\u5c01\u88c5\u3001\u7ee7\u627f\u3001\u591a\u6001\uff0c\u4f60\u5df2\u7ecf\u638c\u63e1\u4e86\u9762\u5411\u5bf9\u8c61\u7684\u4e09\u5927\u6838\u5fc3\u7279\u6027\u3002\u8fd9\u4e2a\u57fa\u7840\u4e4b\u540e\uff0c\u4e0b\u4e00\u4e2a\u8bdd\u9898\u662f <strong>\u63a5\u53e3<\/strong>\u2014\u2014\u5b83\u662f\u62bd\u8c61\u7c7b\u601d\u60f3\u7684\u8fdb\u4e00\u6b65\u5ef6\u4f38\uff0c\u800c\u4e14\u5728\u5b9e\u9645\u5de5\u7a0b\u4e2d\uff0c\u63a5\u53e3\u6bd4\u62bd\u8c61\u7c7b\u7684\u51fa\u573a\u7387\u8fd8\u8981\u9ad8\u5f97\u591a\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u63a5\u53e3\u4e4b\u4e8e Java\uff0c\u5c31\u50cf\u5951\u7ea6\u4e4b\u4e8e\u793e\u4f1a\u2014\u2014\u660e\u786e\u4e86\u53cc\u65b9\u7684\u8d23\u4efb\u8fb9\u754c\uff0c\u964d\u4f4e\u4e86\u5f7c\u6b64\u4f9d\u8d56\u7684\u8026\u5408\u5ea6\u3002<\/p>\n<\/blockquote>\n\n","protected":false},"excerpt":{"rendered":"<p>\u4e0a\u4e00\u7bc7\u6211\u4eec\u62c6\u89e3\u4e86\u591a\u6001\u7684\u5e95\u5c42\u673a\u5236\u2014\u2014\u52a8\u6001\u7ed1\u5b9a\u3001\u5411\u4e0a\u8f6c\u578b\u3001\u5411\u4e0b\u8f6c\u578b\u3001\u7f16\u8bd1\u65f6\u7c7b\u578b vs \u8fd0\u884c\u65f6\u7c7b\u578b\u3002\u638c\u63e1\u4e86\u8fd9\u4e9b\u57fa\u672c\u529f [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35,68],"tags":[],"class_list":["post-270","post","type-post","status-publish","format-standard","hentry","category-03-","category-04-polymorphism"],"_links":{"self":[{"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/posts\/270","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/comments?post=270"}],"version-history":[{"count":2,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/posts\/270\/revisions"}],"predecessor-version":[{"id":278,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/posts\/270\/revisions\/278"}],"wp:attachment":[{"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/media?parent=270"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/categories?post=270"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/tags?post=270"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}