{"id":203081,"date":"2025-05-22T09:26:47","date_gmt":"2025-05-22T01:26:47","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203081\/"},"modified":"2025-05-22T09:26:47","modified_gmt":"2025-05-22T01:26:47","slug":"java-%e5%87%bd%e6%95%b0%e8%ae%bf%e9%97%ae%e6%9d%83%e9%99%90%e5%a6%82%e4%bd%95%e4%bf%83%e8%bf%9b%e4%bb%a3%e7%a0%81%e8%a7%a3%e8%80%a6%e5%92%8c%e6%a8%a1%e5%9d%97%e5%8c%96","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203081\/","title":{"rendered":"Java \u51fd\u6570\u8bbf\u95ee\u6743\u9650\u5982\u4f55\u4fc3\u8fdb\u4ee3\u7801\u89e3\u8026\u548c\u6a21\u5757\u5316"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java \u51fd\u6570\u8bbf\u95ee\u6743\u9650\u5982\u4f55\u4fc3\u8fdb\u4ee3\u7801\u89e3\u8026\u548c\u6a21\u5757\u5316<\/h1>\n<p>\u6765\u5230\u7684\u5927\u5bb6\uff0c\u76f8\u4fe1\u90fd\u662f\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5e0c\u671b\u5728\u8fd9\u91cc\u5b66\u4e60\u6587\u7ae0\u76f8\u5173\u7f16\u7a0b\u77e5\u8bc6\u3002\u4e0b\u9762\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u5e26\u5927\u5bb6\u804a\u804a\u300aJava \u51fd\u6570\u8bbf\u95ee\u6743\u9650\u5982\u4f55\u4fc3\u8fdb\u4ee3\u7801\u89e3\u8026\u548c\u6a21\u5757\u5316\u300b\uff0c\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n<p>Java \u51fd\u6570\u8bbf\u95ee\u6743\u9650\u53ef\u901a\u8fc7\u63a7\u5236\u51fd\u6570\u53ef\u89c1\u6027\u6765\u5b9e\u73b0\u4ee3\u7801\u89e3\u8026\uff1a\u9650\u5236\u5916\u90e8\u5bf9\u51fd\u6570\u7684\u8bbf\u95ee\uff0c\u5c06\u4ee3\u7801\u903b\u8f91\u5206\u79bb\u5230\u4e0d\u540c\u7c7b\u6216\u6a21\u5757\u4e2d\u3002\u5c06\u76f8\u5173\u51fd\u6570\u7ec4\u7ec7\u5230\u6a21\u5757\u4e2d\uff0c\u4fc3\u8fdb\u4ee3\u7801\u91cd\u7528\u6027\u3002\u89e3\u8026\u7528\u6237\u754c\u9762\u548c\u4e1a\u52a1\u903b\u8f91\uff0c\u63d0\u9ad8\u53ef\u6d4b\u8bd5\u6027\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241028\/1730077298671ee272bfafd.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u51fd\u6570\u8bbf\u95ee\u6743\u9650\uff1a\u901a\u5f80\u4ee3\u7801\u89e3\u8026\u548c\u6a21\u5757\u5316\u7684\u6865\u6881<\/strong><\/p>\n<p><strong>\u5f15\u8a00<\/strong><\/p>\n<p>\u5728\u73b0\u4ee3\u8f6f\u4ef6\u5f00\u53d1\u4e2d\uff0c\u6a21\u5757\u5316\u548c\u89e3\u8026\u81f3\u5173\u91cd\u8981\uff0c\u53ef\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u3001\u53ef\u91cd\u7528\u6027\u548c\u53ef\u6d4b\u8bd5\u6027\u3002Java \u51fd\u6570\u8bbf\u95ee\u6743\u9650\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u901a\u8fc7\u4e25\u683c\u63a7\u5236\u51fd\u6570\u7684\u53ef\u89c1\u6027\u6765\u4fc3\u8fdb\u8fd9\u4e9b\u539f\u5219\u3002<\/p>\n<p><strong>\u51fd\u6570\u8bbf\u95ee\u6743\u9650\u7ea7\u522b<\/strong><\/p>\n<p>Java \u63d0\u4f9b\u56db\u79cd\u51fd\u6570\u8bbf\u95ee\u6743\u9650\u7ea7\u522b\uff1a<\/p>\n<ul>\n<li><code>public<\/code>\uff1a\u53ef\u4ece\u4efb\u4f55\u7c7b\u6216\u5305\u8bbf\u95ee<\/li>\n<li><code>protected<\/code>\uff1a\u53ef\u4ece\u540c\u4e00\u5305\u5185\u7684\u7c7b\u6216\u5176\u5b50\u7c7b\u8bbf\u95ee<\/li>\n<li><code>default<\/code>\uff1a\u4ec5\u53ef\u4ece\u540c\u4e00\u5305\u5185\u7684\u7c7b\u8bbf\u95ee\uff08\u4e5f\u79f0\u4e3a\u5305\u7ea7\u79c1\u6709\uff09<\/li>\n<li><code>private<\/code>\uff1a\u4ec5\u53ef\u4ece\u5b9a\u4e49\u51fd\u6570\u7684\u7c7b\u5185\u90e8\u8bbf\u95ee<\/li>\n<\/ul>\n<p><strong>\u5982\u4f55\u4f7f\u7528\u8bbf\u95ee\u6743\u9650\u8fdb\u884c\u4ee3\u7801\u89e3\u8026<\/strong><\/p>\n<p>\u901a\u8fc7\u4f7f\u7528\u9002\u5f53\u7684\u8bbf\u95ee\u6743\u9650\u7ea7\u522b\uff0c\u60a8\u53ef\u4ee5\u9650\u5236\u5bf9\u51fd\u6570\u7684\u8bbf\u95ee\uff0c\u4ece\u800c\u5c06\u4ee3\u7801\u903b\u8f91\u5206\u79bb\u5230\u4e0d\u540c\u7684\u7c7b\u6216\u6a21\u5757\u4e2d\u3002\u4f8b\u5982\uff0c\u5047\u5982\u6709\u4e24\u4e2a\u7c7b <code>Customer<\/code> \u548c <code>OrderService<\/code>\uff1a<\/p>\n<pre>\/\/ Customer.java\npublic class Customer {\n    private String name;\n    \n    public String getName() {\n        return name;\n    }\n    \n    public void setName(String name) {\n        this.name = name;\n    }\n}\n\n\/\/ OrderService.java\npublic class OrderService {\n    private void validateCustomer(Customer customer) { \/\/\u79c1\u6709\u65b9\u6cd5\n        if (customer.getName() == null) {\n            throw new IllegalArgumentException(\"Customer name cannot be null\");\n        }\n    }\n    \n    public void placeOrder(Customer customer, ...) { \/\/\u516c\u5171\u65b9\u6cd5\n        validateCustomer(customer);\n        \/\/ \u5bf9\u8ba2\u5355\u8fdb\u884c\u5904\u7406\n    }\n}<\/pre>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c<code>validateCustomer<\/code> \u65b9\u6cd5\u88ab\u6807\u8bb0\u4e3a\u79c1\u6709\uff0c\u4f7f\u5176\u4ec5\u5bf9 <code>OrderService<\/code> \u7c7b\u53ef\u89c1\u3002\u8fd9\u9632\u6b62\u4e86\u5916\u90e8\u7c7b\u76f4\u63a5\u8c03\u7528\u6b64\u65b9\u6cd5\uff0c\u4ece\u800c\u5c06\u5ba2\u6237\u9a8c\u8bc1\u903b\u8f91\u4e0e\u8ba2\u5355\u5904\u7406\u903b\u8f91\u89e3\u8026\u3002<\/p>\n<p><strong>\u4f7f\u7528\u8bbf\u95ee\u6743\u9650\u4fc3\u8fdb\u6a21\u5757\u5316<\/strong><\/p>\n<p>\u8bbf\u95ee\u6743\u9650\u8fd8\u53ef\u7528\u4e8e\u5c06\u76f8\u5173\u51fd\u6570\u7ec4\u7ec7\u5230\u6a21\u5757\u4e2d\uff0c\u4fc3\u8fdb\u4ee3\u7801\u91cd\u7528\u6027\u3002\u4f8b\u5982\uff0c\u5047\u5982\u6709\u4ee5\u4e0b\u4e09\u4e2a\u51fd\u6570\uff1a<\/p>\n<pre>public void printWelcomeMessage() { \/* \u4ee3\u7801 *\/ }\npublic void printErrorMessage() { \/* \u4ee3\u7801 *\/ }\npublic void printInfoMessage() { \/* \u4ee3\u7801 *\/ }<\/pre>\n<p>\u8fd9\u4e9b\u51fd\u6570\u53ef\u653e\u7f6e\u5728\u4e00\u4e2a\u540d\u4e3a <code>MessagePrinter<\/code> \u7684\u72ec\u7acb\u7c7b\u4e2d\uff0c\u8be5\u7c7b\u5b9a\u4e49\u4e86\u6309\u7c7b\u578b\u6253\u5370\u6d88\u606f\u7684\u63a5\u53e3\uff1a<\/p>\n<pre>public interface MessagePrinter {\n    void printWelcomeMessage();\n    void printErrorMessage();\n    void printInfoMessage();\n}\n\npublic class DefaultMessagePrinter implements MessagePrinter {\n    @Override\n    public void printWelcomeMessage() { \/* \u4ee3\u7801 *\/ }\n    @Override\n    public void printErrorMessage() { \/* \u4ee3\u7801 *\/ }\n    @Override\n    public void printInfoMessage() { \/* \u4ee3\u7801 *\/ }\n}<\/pre>\n<p>\u901a\u8fc7\u5c06\u8fd9\u4e9b\u51fd\u6570\u653e\u5165\u4e00\u4e2a\u6a21\u5757\u5316\u7c7b\u4e2d\uff0c\u60a8\u53ef\u4ee5\u5c06\u4e0e\u6d88\u606f\u6253\u5370\u76f8\u5173\u7684\u903b\u8f91\u4ece\u4e1a\u52a1\u903b\u8f91\u4e2d\u5206\u79bb\u51fa\u6765\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u7ec4\u7ec7\u6027\u548c\u91cd\u7528\u6027\u3002<\/p>\n<p><strong>\u5b9e\u6218\u6848\u4f8b\uff1a\u89e3\u8026\u7528\u6237\u754c\u9762\u548c\u4e1a\u52a1\u903b\u8f91<\/strong><\/p>\n<p>\u8003\u8651\u4ee5\u4e0b\u4f7f\u7528 Swing \u6846\u67b6\u5f00\u53d1\u7684\u7b80\u5355 GUI \u5e94\u7528\uff1a<\/p>\n<pre>public class MainFrame extends JFrame {\n    private void onButtonClick() { \/\/\u5305\u542b\u4e1a\u52a1\u903b\u8f91\n        Customer customer = ...;\n        OrderService service = ...;\n        service.placeOrder(customer, ...);\n    }\n}<\/pre>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c<code>onButtonClick<\/code> \u65b9\u6cd5\u5c06\u7528\u6237\u754c\u9762\u4e8b\u4ef6\u5904\u7406\u903b\u8f91\u4e0e\u4e1a\u52a1\u903b\u8f91\uff08<code>placeOrder<\/code>\uff09\u6df7\u5408\u5728\u4e00\u8d77\u3002\u901a\u8fc7\u4f7f\u7528\u8bbf\u95ee\u6743\u9650\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u5b83\u4eec\u89e3\u8026\uff1a<\/p>\n<pre>public interface OrderService {\n    void placeOrder(Customer customer, ...);\n}\n\npublic class SwingOrderService implements OrderService {\n    @Override\n    public void placeOrder(Customer customer, ...) {\n        \/\/ Swing \u7528\u6237\u754c\u9762\u4e8b\u4ef6\u5904\u7406\u903b\u8f91\n    }\n}\n\npublic class MainFrame extends JFrame {\n    private OrderService service = new SwingOrderService();\n    \n    private void onButtonClick() { \/\/\u4ec5\u5904\u7406\u7528\u6237\u754c\u9762\u4e8b\u4ef6\n        Customer customer = ...;\n        service.placeOrder(customer, ...);\n    }\n}<\/pre>\n<p>\u5206\u79bb\u7528\u6237\u754c\u9762\u4e8b\u4ef6\u5904\u7406\u903b\u8f91\u548c\u4e1a\u52a1\u903b\u8f91\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u6d4b\u8bd5\u6027\uff0c\u56e0\u4e3a\u5b83\u5141\u8bb8\u60a8\u72ec\u7acb\u6d4b\u8bd5\u4e24\u79cd\u903b\u8f91\u3002<\/p>\n<p>\u672c\u7bc7\u5173\u4e8e\u300aJava \u51fd\u6570\u8bbf\u95ee\u6743\u9650\u5982\u4f55\u4fc3\u8fdb\u4ee3\u7801\u89e3\u8026\u548c\u6a21\u5757\u5316\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java \u51fd\u6570\u8bbf\u95ee\u6743\u9650\u5982\u4f55\u4fc3\u8fdb\u4ee3&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-203081","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203081","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=203081"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203081\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203081"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203081"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203081"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}