{"id":432,"date":"2023-08-19T00:11:21","date_gmt":"2023-08-10T04:22:49","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/java%e4%b8%ad%e7%9a%84%e7%ad%96%e7%95%a5%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f-%e7%a4%ba%e4%be%8b%e6%95%99%e7%a8%8b\/"},"modified":"2025-08-02T07:48:39","modified_gmt":"2025-08-01T23:48:39","slug":"java%e4%b8%ad%e7%9a%84%e7%ad%96%e7%95%a5%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f-%e7%a4%ba%e4%be%8b%e6%95%99%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java%e4%b8%ad%e7%9a%84%e7%ad%96%e7%95%a5%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f-%e7%a4%ba%e4%be%8b%e6%95%99%e7%a8%8b\/","title":{"rendered":"Java\u7b56\u7565\u8bbe\u8ba1\u6a21\u5f0f\u8be6\u89e3\uff1a\u5b9e\u7528\u6848\u4f8b\u4e0e\u6700\u4f73\u5b9e\u8df5"},"content":{"rendered":"<p>\u7b56\u7565\u8bbe\u8ba1\u6a21\u5f0f\u662f\u884c\u4e3a\u8bbe\u8ba1\u6a21\u5f0f\u4e4b\u4e00\u3002\u5f53\u6211\u4eec\u6709\u591a\u4e2a\u7b97\u6cd5\u7528\u4e8e\u7279\u5b9a\u4efb\u52a1\uff0c\u5e76\u4e14\u5ba2\u6237\u7aef\u5728\u8fd0\u884c\u65f6\u51b3\u5b9a\u4f7f\u7528\u54ea\u79cd\u5b9e\u9645\u5b9e\u73b0\u65f6\uff0c\u5c31\u4f1a\u4f7f\u7528\u7b56\u7565\u6a21\u5f0f\u3002<\/p>\n<h2>\u7b56\u7565\u6a21\u5f0f<\/h2>\n<p>\u7b56\u7565\u6a21\u5f0f\u5141\u8bb8\u6211\u4eec\u5b9a\u4e49\u4e00\u7cfb\u5217\u7b97\u6cd5\uff0c\u5e76\u5c06\u6bcf\u4e2a\u7b97\u6cd5\u5c01\u88c5\u8d77\u6765\uff0c\u4f7f\u5b83\u4eec\u53ef\u4ee5\u76f8\u4e92\u66ff\u6362\u3002\u7b56\u7565\u6a21\u5f0f\u8ba9\u7b97\u6cd5\u7684\u53d8\u5316\u72ec\u7acb\u4e8e\u4f7f\u7528\u7b97\u6cd5\u7684\u5ba2\u6237\u7aef\u3002\u7b56\u7565\u6a21\u5f0f\u6700\u597d\u7684\u4f8b\u5b50\u4e4b\u4e00\u662fCollections.sort()\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u63a5\u53d7Comparator\u53c2\u6570\u3002\u6839\u636e\u4e0d\u540c\u7684Comparator\u63a5\u53e3\u5b9e\u73b0\uff0c\u5bf9\u8c61\u4ee5\u4e0d\u540c\u7684\u65b9\u5f0f\u8fdb\u884c\u6392\u5e8f\u3002\u5bf9\u4e8e\u6211\u4eec\u7684\u793a\u4f8b\uff0c\u6211\u4eec\u5c06\u5c1d\u8bd5\u5b9e\u73b0\u4e00\u4e2a\u7b80\u5355\u7684\u8d2d\u7269\u8f66\uff0c\u5176\u4e2d\u5305\u62ec\u4e24\u79cd\u4ed8\u6b3e\u7b56\u7565-\u4f7f\u7528\u4fe1\u7528\u5361\u6216\u4f7f\u7528PayPal\u3002\u9996\u5148\uff0c\u6211\u4eec\u5c06\u4e3a\u6211\u4eec\u7684\u7b56\u7565\u6a21\u5f0f\u793a\u4f8b\u521b\u5efa\u63a5\u53e3\uff0c\u8be5\u63a5\u53e3\u7528\u4e8e\u652f\u4ed8\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7684\u91d1\u989d\u3002PaymentStrategy.java<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.design.strategy;\r\n\r\n\/**\r\n * \u652f\u4ed8\u7b56\u7565\u63a5\u53e3\r\n * \u5b9a\u4e49\u4e86\u652f\u4ed8\u65b9\u6cd5\u7684\u89c4\u8303\r\n *\/\r\npublic interface PaymentStrategy {\r\n\r\n\tpublic void pay(int amount);\r\n}\r\n<\/code><\/pre>\n<p>\u73b0\u5728\u6211\u4eec\u9700\u8981\u4e3a\u4f7f\u7528\u4fe1\u7528\u5361\/\u501f\u8bb0\u5361\u6216\u901a\u8fc7PayPal\u8fdb\u884c\u652f\u4ed8\u7684\u7b97\u6cd5\u521b\u5efa\u5177\u4f53\u5b9e\u73b0\u3002CreditCardStrategy.java\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.design.strategy;\r\n\r\n\/**\r\n * \u4fe1\u7528\u5361\u652f\u4ed8\u7b56\u7565\u5b9e\u73b0\u7c7b\r\n *\/\r\npublic class CreditCardStrategy implements PaymentStrategy {\r\n\r\n\tprivate String name;\r\n\tprivate String cardNumber;\r\n\tprivate String cvv;\r\n\tprivate String dateOfExpiry;\r\n\t\r\n\tpublic CreditCardStrategy(String nm, String ccNum, String cvv, String expiryDate){\r\n\t\tthis.name=nm;\r\n\t\tthis.cardNumber=ccNum;\r\n\t\tthis.cvv=cvv;\r\n\t\tthis.dateOfExpiry=expiryDate;\r\n\t}\r\n\t@Override\r\n\tpublic void pay(int amount) {\r\n\t\tSystem.out.println(amount +\" \u4f7f\u7528\u4fe1\u7528\u5361\/\u501f\u8bb0\u5361\u652f\u4ed8\");\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<p>PaypalStrategy.java<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.design.strategy;\r\n\r\n\/**\r\n * PayPal\u652f\u4ed8\u7b56\u7565\u5b9e\u73b0\u7c7b\r\n *\/\r\npublic class PaypalStrategy implements PaymentStrategy {\r\n\r\n\tprivate String emailId;\r\n\tprivate String password;\r\n\t\r\n\tpublic PaypalStrategy(String email, String pwd){\r\n\t\tthis.emailId=email;\r\n\t\tthis.password=pwd;\r\n\t}\r\n\t\r\n\t@Override\r\n\tpublic void pay(int amount) {\r\n\t\tSystem.out.println(amount + \" \u4f7f\u7528PayPal\u652f\u4ed8\u3002\");\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<p>\u73b0\u5728\u6211\u4eec\u7684\u7b56\u7565\u6a21\u5f0f\u793a\u4f8b\u7b97\u6cd5\u5df2\u7ecf\u51c6\u5907\u597d\u4e86\u3002\u6211\u4eec\u53ef\u4ee5\u5b9e\u73b0\u8d2d\u7269\u8f66\u5e76\u4e14\u4ed8\u6b3e\u65b9\u5f0f\u5c06\u9700\u8981\u4ee5\u652f\u4ed8\u7b56\u7565\u4e3a\u8f93\u5165\u3002Item.java<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.design.strategy;\r\n\r\n\/**\r\n * \u5546\u54c1\u7c7b\r\n *\/\r\npublic class Item {\r\n\r\n\tprivate String upcCode;\r\n\tprivate int price;\r\n\t\r\n\tpublic Item(String upc, int cost){\r\n\t\tthis.upcCode=upc;\r\n\t\tthis.price=cost;\r\n\t}\r\n\r\n\tpublic String getUpcCode() {\r\n\t\treturn upcCode;\r\n\t}\r\n\r\n\tpublic int getPrice() {\r\n\t\treturn price;\r\n\t}\r\n\t\r\n}\r\n<\/code><\/pre>\n<p>ShoppingCart.java<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.design.strategy;\r\n\r\nimport java.text.DecimalFormat;\r\nimport java.util.ArrayList;\r\nimport java.util.List;\r\n\r\n\/**\r\n * \u8d2d\u7269\u8f66\u7c7b\r\n *\/\r\npublic class ShoppingCart {\r\n\r\n\t\/\/ \u5546\u54c1\u5217\u8868\r\n\tList&lt;Item&gt; items;\r\n\t\r\n\tpublic ShoppingCart(){\r\n\t\tthis.items=new ArrayList&lt;Item&gt;();\r\n\t}\r\n\t\r\n\tpublic void addItem(Item item){\r\n\t\tthis.items.add(item);\r\n\t}\r\n\t\r\n\tpublic void removeItem(Item item){\r\n\t\tthis.items.remove(item);\r\n\t}\r\n\t\r\n\tpublic int calculateTotal(){\r\n\t\tint sum = 0;\r\n\t\tfor(Item item : items){\r\n\t\t\tsum += item.getPrice();\r\n\t\t}\r\n\t\treturn sum;\r\n\t}\r\n\t\r\n\tpublic void pay(PaymentStrategy paymentMethod){\r\n\t\tint amount = calculateTotal();\r\n\t\tpaymentMethod.pay(amount);\r\n\t}\r\n}\r\n<\/code><\/pre>\n<p>\u8bf7\u6ce8\u610f\uff0c\u8d2d\u7269\u8f66\u7684\u4ed8\u6b3e\u65b9\u6cd5\u9700\u8981\u5c06\u4ed8\u6b3e\u7b97\u6cd5\u4f5c\u4e3a\u53c2\u6570\uff0c\u5e76\u4e14\u4e0d\u5c06\u5176\u5b58\u50a8\u4e3a\u5b9e\u4f8b\u53d8\u91cf\u3002\u8ba9\u6211\u4eec\u7528\u4e00\u4e2a\u7b80\u5355\u7684\u7a0b\u5e8f\u6765\u6d4b\u8bd5\u6211\u4eec\u7684\u7b56\u7565\u6a21\u5f0f\u793a\u4f8b\u8bbe\u7f6e\u3002\u8bf7\u53c2\u9605ShoppingCartTest.java\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.design.strategy;\r\n\r\n\/**\r\n * \u8d2d\u7269\u8f66\u6d4b\u8bd5\u7c7b\r\n *\/\r\npublic class ShoppingCartTest {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tShoppingCart cart = new ShoppingCart();\r\n\t\t\r\n\t\tItem item1 = new Item(\"1234\",10);\r\n\t\tItem item2 = new Item(\"5678\",40);\r\n\t\t\r\n\t\tcart.addItem(item1);\r\n\t\tcart.addItem(item2);\r\n\t\t\r\n\t\t\/\/ \u4f7f\u7528PayPal\u652f\u4ed8\r\n\t\tcart.pay(new PaypalStrategy(\"myemail@example.com\", \"mypwd\"));\r\n\t\t\r\n\t\t\/\/ \u4f7f\u7528\u4fe1\u7528\u5361\u652f\u4ed8\r\n\t\tcart.pay(new CreditCardStrategy(\"Pankaj Kumar\", \"1234567890123456\", \"786\", \"12\/15\"));\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u7684\u8f93\u51fa\u4e3a:<\/p>\n<pre class=\"post-pre\"><code>50 \u4f7f\u7528PayPal\u652f\u4ed8\u3002\r\n50 \u4f7f\u7528\u4fe1\u7528\u5361\/\u501f\u8bb0\u5361\u652f\u4ed8\r\n<\/code><\/pre>\n<h3>\u7b56\u7565\u8bbe\u8ba1\u6a21\u5f0f\u7684\u7c7b\u56fe<\/h3>\n<h3>\u7b56\u7565\u8bbe\u8ba1\u6a21\u5f0f\u7684\u91cd\u70b9\u8981\u70b9<\/h3>\n<ul class=\"post-ul\">\n<li>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u7ec4\u5408\u6765\u4e3a\u7b56\u7565\u521b\u5efa\u5b9e\u4f8b\u53d8\u91cf\uff0c\u4f46\u5e94\u8be5\u907f\u514d\u8fd9\u6837\u505a\uff0c\u56e0\u4e3a\u6211\u4eec\u5e0c\u671b\u7279\u5b9a\u7b56\u7565\u5e94\u7528\u4e8e\u7279\u5b9a\u4efb\u52a1\u3002Collections.sort()\u548cArrays.sort()\u65b9\u6cd5\u4e5f\u9075\u5faa\u76f8\u540c\u7684\u539f\u5219\uff0c\u5b83\u4eec\u5c06comparator\u4f5c\u4e3a\u53c2\u6570\u3002<\/li>\n<li>\u7b56\u7565\u6a21\u5f0f\u4e0e\u72b6\u6001\u6a21\u5f0f\u975e\u5e38\u76f8\u4f3c\u3002\u5176\u4e2d\u4e00\u4e2a\u533a\u522b\u662f\uff0c\u4e0a\u4e0b\u6587(Context)\u5305\u542b\u72b6\u6001\u4f5c\u4e3a\u5b9e\u4f8b\u53d8\u91cf\uff0c\u5e76\u4e14\u53ef\u80fd\u6709\u591a\u4e2a\u4efb\u52a1\u7684\u5b9e\u73b0\u4f9d\u8d56\u4e8e\u72b6\u6001\uff0c\u800c\u5728\u7b56\u7565\u6a21\u5f0f\u4e2d\uff0c\u7b56\u7565\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u65b9\u6cd5\uff0c\u4e0a\u4e0b\u6587\u5bf9\u8c61\u6ca1\u6709\u4efb\u4f55\u53d8\u91cf\u6765\u5b58\u50a8\u5b83\u3002<\/li>\n<li>\u5f53\u6211\u4eec\u6709\u7279\u5b9a\u4efb\u52a1\u7684\u591a\u4e2a\u7b97\u6cd5\uff0c\u5e76\u4e14\u5e0c\u671b\u6211\u4eec\u7684\u5e94\u7528\u7a0b\u5e8f\u80fd\u591f\u7075\u6d3b\u5730\u5728\u8fd0\u884c\u65f6\u4e3a\u7279\u5b9a\u4efb\u52a1\u9009\u62e9\u4efb\u4f55\u7b97\u6cd5\u65f6\uff0c\u7b56\u7565\u6a21\u5f0f\u975e\u5e38\u6709\u7528\u3002<\/li>\n<\/ul>\n<p>\u5173\u4e8eJava\u4e2d\u7684\u7b56\u7565\u6a21\u5f0f\uff0c\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u5427\uff0c\u5e0c\u671b\u4f60\u559c\u6b22\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7b56\u7565\u8bbe\u8ba1\u6a21\u5f0f\u662f\u884c\u4e3a\u8bbe\u8ba1\u6a21\u5f0f\u4e4b\u4e00\u3002\u5f53\u6211\u4eec\u6709\u591a\u4e2a\u7b97\u6cd5\u7528\u4e8e\u7279\u5b9a\u4efb\u52a1\uff0c\u5e76\u4e14\u5ba2\u6237\u7aef\u5728\u8fd0\u884c\u65f6\u51b3\u5b9a\u4f7f\u7528\u54ea\u79cd\u5b9e\u9645\u5b9e\u73b0\u65f6\uff0c\u5c31\u4f1a\u4f7f [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[180,760,1357],"class_list":{"0":"post-432","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-uncategorized","7":"tag-java","9":"tag-1357"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java\u7b56\u7565\u8bbe\u8ba1\u6a21\u5f0f\u8be6\u89e3\uff1a\u5b9e\u7528\u6848\u4f8b\u4e0e\u6700\u4f73\u5b9e\u8df5 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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