{"id":22003,"date":"2024-09-05T11:31:37","date_gmt":"2024-09-05T03:31:37","guid":{"rendered":"https:\/\/aif.amtbbs.org\/?p=22003"},"modified":"2024-09-05T11:31:37","modified_gmt":"2024-09-05T03:31:37","slug":"java8-%e4%b8%ad%e4%b8%80%e4%b8%aa%e6%9e%81%e5%85%b6%e5%bc%ba%e6%82%8d%e7%9a%84%e6%96%b0%e6%8e%a5%e5%8f%a3%ef%bc%8c%e5%be%88%e5%a4%9a%e4%ba%ba%e6%b2%a1%e7%94%a8%e8%bf%87","status":"publish","type":"post","link":"https:\/\/aif.amtbbs.org\/index.php\/2024\/09\/05\/22003\/","title":{"rendered":"Java8 \u4e2d\u4e00\u4e2a\u6781\u5176\u5f3a\u608d\u7684\u65b0\u63a5\u53e3\uff0c\u5f88\u591a\u4eba\u6ca1\u7528\u8fc7"},"content":{"rendered":"<div><img data-dominant-color=\"bfc6d0\" data-has-transparency=\"false\" style=\"--dominant-color: #bfc6d0;\" loading=\"lazy\" decoding=\"async\" class=\"not-transparent alignnone size-full wp-image-22005\" src=\"https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/09\/193ce20798838df1090109c7fb2ba3af656ba6-300x167-1.jpg\" width=\"300\" height=\"167\" alt=\"\" srcset=\"https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/09\/193ce20798838df1090109c7fb2ba3af656ba6-300x167-1.jpg 300w, https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/09\/193ce20798838df1090109c7fb2ba3af656ba6-300x167-1-150x84.jpg 150w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/div>\n<div class=\"article-desc\">Function\u63a5\u53e3\u662fJava8\u5f15\u5165\u7684\u4e00\u4e2a\u975e\u5e38\u5f3a\u608d\u7684\u65b0\u63a5\u53e3\uff0c\u5b83\u8ba9\u6211\u4eec\u80fd\u591f\u4ee5\u66f4\u52a0\u58f0\u660e\u5f0f\u7684\u65b9\u5f0f\u6765\u7f16\u5199\u4ee3\u7801\uff0c\u6781\u5927\u5730\u7b80\u5316\u4e86\u6211\u4eec\u7684\u5f00\u53d1\u5de5\u4f5c\u3002\u901a\u8fc7\u4e0a\u9762\u7684\u4f8b\u5b50\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230Function\u63a5\u53e3\u5728\u96c6\u5408\u7684\u8f6c\u6362\u3001\u4e8b\u4ef6\u7684\u76d1\u542c\u3001\u5f02\u6b65\u4efb\u52a1\u7684\u5904\u7406\u7b49\u573a\u666f\u4e2d\u7684\u5e7f\u6cdb\u5e94\u7528\u3002<\/div>\n<div id=\"postspictures\" class=\"article-content\">\n<div id=\"container\" class=\"container am-engine\" data-v-1d7a5742=\"\" data-element=\"root\">\n<p>\u5728Java8\u7684\u6d69\u701a\u5b87\u5b99\u4e2d\uff0c\u9690\u85cf\u7740\u8bb8\u591a\u672a\u88ab\u5145\u5206\u53d1\u6398\u7684\u5b9d\u85cf\u3002\u4eca\u5929\uff0c\u6211\u8981\u5e26\u4f60\u4e00\u8d77\u63a2\u7d22\u5176\u4e2d\u4e00\u4e2a\u6781\u5176\u5f3a\u608d\u7684\u65b0\u63a5\u53e3\uff0c\u5b83\u53ef\u80fd\u5c31\u5728\u4f60\u7684\u5f00\u53d1\u5de5\u5177\u5305\u91cc\u9ed8\u9ed8\u65e0\u95fb\u5730\u8eba\u7740\uff0c\u5374\u5f88\u5c11\u6709\u4eba\u771f\u6b63\u53bb\u4f7f\u7528\u5b83\u3002\u8fd9\u4e2a\u63a5\u53e3\u4e0d\u4ec5\u529f\u80fd\u5f3a\u5927\uff0c\u800c\u4e14\u80fd\u591f\u6781\u5927\u5730\u7b80\u5316\u6211\u4eec\u7684\u4ee3\u7801\uff0c\u63d0\u5347\u5f00\u53d1\u6548\u7387\u3002\u5b83\u5c31\u662f\u2014\u2014java.util.function.Function\u63a5\u53e3\u3002<\/p>\n<p>&nbsp;<\/p>\n<h4>Java8\u7684\u65b0\u7279\u6027\u6982\u89c8<\/h4>\n<p>Java8\u4f5c\u4e3aJava\u8bed\u8a00\u7684\u4e00\u4e2a\u91cd\u8981\u91cc\u7a0b\u7891\uff0c\u5f15\u5165\u4e86\u8bb8\u591a\u4ee4\u4eba\u5174\u594b\u7684\u65b0\u7279\u6027\uff0c\u6bd4\u5982Lambda\u8868\u8fbe\u5f0f\u3001Stream API\u3001\u65b0\u7684\u65e5\u671f\u65f6\u95f4API\u7b49\u3002\u8fd9\u4e9b\u65b0\u7279\u6027\u8ba9Java\u8fd9\u95e8\u201c\u53e4\u8001\u201d\u7684\u8bed\u8a00\u7115\u53d1\u51fa\u4e86\u65b0\u7684\u6d3b\u529b\uff0c\u4e5f\u8ba9Java\u7a0b\u5e8f\u5458\u4eec\u80fd\u591f\u7f16\u5199\u51fa\u66f4\u52a0\u7b80\u6d01\u3001\u6613\u8bfb\u7684\u4ee3\u7801\u3002<\/p>\n<p>\u7136\u800c\uff0c\u5728Java8\u7684\u4f17\u591a\u65b0\u7279\u6027\u4e2d\uff0cFunction\u63a5\u53e3\u53ef\u80fd\u5e76\u4e0d\u662f\u90a3\u4e48\u5f15\u4eba\u6ce8\u76ee\u3002\u5b83\u4f4d\u4e8ejava.util.function\u5305\u4e0b\uff0c\u662fJava8\u5f15\u5165\u7684\u4e00\u4e2a\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u7528\u4e8e\u8868\u793a\u63a5\u53d7\u4e00\u4e2a\u8f93\u5165\u53c2\u6570\u5e76\u4ea7\u751f\u4e00\u4e2a\u7ed3\u679c\u7684\u51fd\u6570\u3002\u5c3d\u7ba1\u5b83\u770b\u8d77\u6765\u5e76\u4e0d\u8d77\u773c\uff0c\u4f46Function\u63a5\u53e3\u7684\u5b9e\u9645\u5e94\u7528\u4ef7\u503c\u5374\u8fdc\u8fdc\u8d85\u51fa\u4e86\u6211\u4eec\u7684\u60f3\u8c61\u3002<\/p>\n<p>&nbsp;<\/p>\n<h4>Function\u63a5\u53e3\u7684\u5f3a\u5927\u4e4b\u5904<\/h4>\n<p>Function\u63a5\u53e3\u7684\u5b9a\u4e49\u975e\u5e38\u7b80\u5355\uff0c\u5b83\u53ea\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5apply\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u63a5\u53d7\u4e00\u4e2a\u8f93\u5165\u53c2\u6570T\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u7ed3\u679cR\u3002<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_0\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-sql\" tabindex=\"0\"><code class=\"language-sql\"><span class=\"token variable\">@FunctionalInterface<\/span>\r\n<span class=\"token keyword\">public<\/span> interface <span class=\"token keyword\">Function<\/span><span class=\"token operator\">&lt;<\/span>T<span class=\"token punctuation\">,<\/span> R<span class=\"token operator\">&gt;<\/span> {\r\n    R <span class=\"token keyword\">apply<\/span><span class=\"token punctuation\">(<\/span>T t<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n}<\/code><\/pre>\n<ul id=\"code_id_0\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u6b63\u662f\u7531\u4e8e\u8fd9\u4e2a\u7b80\u5355\u7684\u5b9a\u4e49\uff0cFunction\u63a5\u53e3\u53d8\u5f97\u975e\u5e38\u7075\u6d3b\u548c\u5f3a\u5927\u3002\u5b83\u53ef\u4ee5\u7528\u4e8e\u4efb\u4f55\u9700\u8981\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u6216\u8fd4\u56de\u503c\u7684\u573a\u666f\uff0c\u8ba9\u6211\u4eec\u80fd\u591f\u4ee5\u66f4\u52a0\u58f0\u660e\u5f0f\u7684\u65b9\u5f0f\u6765\u7f16\u5199\u4ee3\u7801\u3002<\/p>\n<p>&nbsp;<\/p>\n<h4>\u4f7f\u7528Function\u63a5\u53e3\u7b80\u5316\u4ee3\u7801<\/h4>\n<p>\u8ba9\u6211\u4eec\u901a\u8fc7\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\u6765\u770b\u770bFunction\u63a5\u53e3\u662f\u5982\u4f55\u7b80\u5316\u6211\u4eec\u7684\u4ee3\u7801\u7684\u3002\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u7528\u6237\u5217\u8868\uff0c\u6211\u4eec\u9700\u8981\u6839\u636e\u7528\u6237\u7684ID\u6765\u83b7\u53d6\u7528\u6237\u7684\u59d3\u540d\u3002\u5728\u6ca1\u6709\u4f7f\u7528Function\u63a5\u53e3\u4e4b\u524d\uff0c\u6211\u4eec\u7684\u4ee3\u7801\u53ef\u80fd\u770b\u8d77\u6765\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_1\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-sql\" tabindex=\"0\"><code class=\"language-sql\"><span class=\"token keyword\">public<\/span> String getUserNameById<span class=\"token punctuation\">(<\/span>List<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">User<\/span><span class=\"token operator\">&gt;<\/span> users<span class=\"token punctuation\">,<\/span> String userId<span class=\"token punctuation\">)<\/span> {\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">User<\/span> <span class=\"token keyword\">user<\/span> : users<span class=\"token punctuation\">)<\/span> {\r\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">user<\/span><span class=\"token punctuation\">.<\/span>getId<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>equals<span class=\"token punctuation\">(<\/span>userId<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> {\r\n            <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">user<\/span><span class=\"token punctuation\">.<\/span>getName<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        }\r\n    }\r\n    <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">null<\/span><span class=\"token punctuation\">;<\/span>\r\n}<\/code><\/pre>\n<ul id=\"code_id_1\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<li>7.<\/li>\n<li>8.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u8fd9\u6bb5\u4ee3\u7801\u867d\u7136\u80fd\u591f\u6b63\u786e\u5de5\u4f5c\uff0c\u4f46\u5b83\u5e76\u4e0d\u662f\u90a3\u4e48\u4f18\u96c5\u3002\u6211\u4eec\u9700\u8981\u904d\u5386\u6574\u4e2a\u7528\u6237\u5217\u8868\uff0c\u7136\u540e\u9010\u4e2a\u68c0\u67e5\u7528\u6237\u7684ID\u662f\u5426\u4e0e\u7ed9\u5b9a\u7684ID\u5339\u914d\u3002\u5982\u679c\u627e\u5230\u4e86\u5339\u914d\u7684\u7528\u6237\uff0c\u6211\u4eec\u5c31\u8fd4\u56de\u7528\u6237\u7684\u59d3\u540d\uff1b\u5426\u5219\uff0c\u6211\u4eec\u8fd4\u56denull\u3002<\/p>\n<p>\u73b0\u5728\uff0c\u8ba9\u6211\u4eec\u4f7f\u7528Function\u63a5\u53e3\u6765\u91cd\u5199\u8fd9\u6bb5\u4ee3\u7801\uff1a<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_2\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-sql\" tabindex=\"0\"><code class=\"language-sql\"><span class=\"token keyword\">public<\/span> String getUserNameById<span class=\"token punctuation\">(<\/span>List<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">User<\/span><span class=\"token operator\">&gt;<\/span> users<span class=\"token punctuation\">,<\/span> String userId<span class=\"token punctuation\">)<\/span> {\r\n    <span class=\"token keyword\">return<\/span> users<span class=\"token punctuation\">.<\/span>stream<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\r\n                <span class=\"token punctuation\">.<\/span>filter<span class=\"token punctuation\">(<\/span><span class=\"token keyword\">user<\/span> <span class=\"token operator\">-<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token keyword\">user<\/span><span class=\"token punctuation\">.<\/span>getId<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>equals<span class=\"token punctuation\">(<\/span>userId<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\r\n                <span class=\"token punctuation\">.<\/span>map<span class=\"token punctuation\">(<\/span><span class=\"token keyword\">User<\/span>::getName<span class=\"token punctuation\">)<\/span>\r\n                <span class=\"token punctuation\">.<\/span>findFirst<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\r\n                <span class=\"token punctuation\">.<\/span>orElse<span class=\"token punctuation\">(<\/span><span class=\"token boolean\">null<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n}<\/code><\/pre>\n<ul id=\"code_id_2\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<li>7.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u901a\u8fc7\u4f7f\u7528Function\u63a5\u53e3\u548cStream API\uff0c\u6211\u4eec\u7684\u4ee3\u7801\u53d8\u5f97\u66f4\u52a0\u7b80\u6d01\u548c\u6613\u8bfb\u3002\u6211\u4eec\u9996\u5148\u5c06\u7528\u6237\u5217\u8868\u8f6c\u6362\u4e3a\u4e00\u4e2a\u6d41\uff0c\u7136\u540e\u4f7f\u7528filter\u65b9\u6cd5\u6765\u7b5b\u9009\u51faID\u5339\u914d\u7684\u7528\u6237\u3002\u63a5\u7740\uff0c\u6211\u4eec\u4f7f\u7528map\u65b9\u6cd5\u5c06\u7528\u6237\u5bf9\u8c61\u6620\u5c04\u4e3a\u5176\u59d3\u540d\u3002\u6700\u540e\uff0c\u6211\u4eec\u4f7f\u7528findFirst\u65b9\u6cd5\u6765\u83b7\u53d6\u7b2c\u4e00\u4e2a\u5339\u914d\u7684\u7528\u6237\u59d3\u540d\uff0c\u5982\u679c\u627e\u4e0d\u5230\u5339\u914d\u7684\u7528\u6237\uff0c\u5219\u8fd4\u56denull\u3002<\/p>\n<p>&nbsp;<\/p>\n<h4>Function\u63a5\u53e3\u7684\u5e94\u7528\u573a\u666f<\/h4>\n<p>Function\u63a5\u53e3\u7684\u5e94\u7528\u573a\u666f\u975e\u5e38\u5e7f\u6cdb\u3002\u5b83\u53ef\u4ee5\u7528\u4e8e\u4efb\u4f55\u9700\u8981\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u6216\u8fd4\u56de\u503c\u7684\u573a\u666f\uff0c\u6bd4\u5982\u96c6\u5408\u7684\u8f6c\u6362\u3001\u4e8b\u4ef6\u7684\u76d1\u542c\u3001\u5f02\u6b65\u4efb\u52a1\u7684\u5904\u7406\u7b49\u3002<\/p>\n<p><strong>\u96c6\u5408\u7684\u8f6c\u6362<\/strong><\/p>\n<p>\u5728\u4f7f\u7528\u96c6\u5408\u65f6\uff0c\u6211\u4eec\u7ecf\u5e38\u9700\u8981\u5bf9\u96c6\u5408\u4e2d\u7684\u5143\u7d20\u8fdb\u884c\u8f6c\u6362\u3002\u6bd4\u5982\uff0c\u6211\u4eec\u6709\u4e00\u4e2a\u7528\u6237ID\u5217\u8868\uff0c\u6211\u4eec\u9700\u8981\u5c06\u5176\u8f6c\u6362\u4e3a\u7528\u6237\u59d3\u540d\u5217\u8868\u3002\u4f7f\u7528Function\u63a5\u53e3\u548cStream API\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u5730\u5b8c\u6210\u8fd9\u4e2a\u4efb\u52a1\uff1a<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_3\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-sql\" tabindex=\"0\"><code class=\"language-sql\">List<span class=\"token operator\">&lt;<\/span>String<span class=\"token operator\">&gt;<\/span> userIds <span class=\"token operator\">=<\/span> Arrays<span class=\"token punctuation\">.<\/span>asList<span class=\"token punctuation\">(<\/span><span class=\"token string\">\"1\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"2\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"3\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\nList<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">User<\/span><span class=\"token operator\">&gt;<\/span> users <span class=\"token operator\">=<\/span> <span class=\"token comment\">\/\/ \u5047\u8bbe\u8fd9\u662f\u4ece\u6570\u636e\u5e93\u6216\u5176\u4ed6\u5730\u65b9\u83b7\u53d6\u7684\u7528\u6237\u5217\u8868<\/span>\r\nList<span class=\"token operator\">&lt;<\/span>String<span class=\"token operator\">&gt;<\/span> userNames <span class=\"token operator\">=<\/span> userIds<span class=\"token punctuation\">.<\/span>stream<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\r\n                                <span class=\"token punctuation\">.<\/span>map<span class=\"token punctuation\">(<\/span>userId <span class=\"token operator\">-<\/span><span class=\"token operator\">&gt;<\/span> getUserById<span class=\"token punctuation\">(<\/span>users<span class=\"token punctuation\">,<\/span> userId<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\r\n                                <span class=\"token punctuation\">.<\/span>map<span class=\"token punctuation\">(<\/span><span class=\"token keyword\">User<\/span>::getName<span class=\"token punctuation\">)<\/span>\r\n                                <span class=\"token punctuation\">.<\/span>collect<span class=\"token punctuation\">(<\/span>Collectors<span class=\"token punctuation\">.<\/span>toList<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/code><\/pre>\n<ul id=\"code_id_3\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u5728\u8fd9\u6bb5\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u4f7f\u7528map\u65b9\u6cd5\u5c06\u7528\u6237ID\u5217\u8868\u8f6c\u6362\u4e3a\u7528\u6237\u5bf9\u8c61\u5217\u8868\u3002\u7136\u540e\uff0c\u6211\u4eec\u518d\u6b21\u4f7f\u7528map\u65b9\u6cd5\u5c06\u7528\u6237\u5bf9\u8c61\u5217\u8868\u8f6c\u6362\u4e3a\u7528\u6237\u59d3\u540d\u5217\u8868\u3002\u6700\u540e\uff0c\u6211\u4eec\u4f7f\u7528collect\u65b9\u6cd5\u5c06\u7ed3\u679c\u6536\u96c6\u5230\u4e00\u4e2a\u65b0\u7684\u5217\u8868\u4e2d\u3002<\/p>\n<p><strong>\u4e8b\u4ef6\u7684\u76d1\u542c<\/strong><\/p>\n<p>\u5728\u7f16\u5199\u4e8b\u4ef6\u9a71\u52a8\u7684\u5e94\u7528\u7a0b\u5e8f\u65f6\uff0c\u6211\u4eec\u7ecf\u5e38\u9700\u8981\u4e3a\u4e0d\u540c\u7684\u4e8b\u4ef6\u6307\u5b9a\u4e0d\u540c\u7684\u5904\u7406\u51fd\u6570\u3002\u4f7f\u7528Function\u63a5\u53e3\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u4e8b\u4ef6\u548c\u5904\u7406\u51fd\u6570\u89e3\u8026\uff0c\u4f7f\u5f97\u4ee3\u7801\u66f4\u52a0\u7075\u6d3b\u548c\u53ef\u6269\u5c55\u3002<\/p>\n<p>\u6bd4\u5982\uff0c\u6211\u4eec\u6709\u4e00\u4e2a\u7b80\u5355\u7684\u4e8b\u4ef6\u76d1\u542c\u5668\u63a5\u53e3\uff1a<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_4\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-sql\" tabindex=\"0\"><code class=\"language-sql\"><span class=\"token keyword\">public<\/span> interface EventListener<span class=\"token operator\">&lt;<\/span>E<span class=\"token operator\">&gt;<\/span> {\r\n    void onEvent<span class=\"token punctuation\">(<\/span>E event<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n}<\/code><\/pre>\n<ul id=\"code_id_4\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Function\u63a5\u53e3\u6765\u521b\u5efa\u4e00\u4e2a\u66f4\u52a0\u901a\u7528\u7684\u4e8b\u4ef6\u76d1\u542c\u5668\uff1a<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_5\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-sql\" tabindex=\"0\"><code class=\"language-sql\"><span class=\"token keyword\">public<\/span> class GenericEventListener<span class=\"token operator\">&lt;<\/span>E<span class=\"token punctuation\">,<\/span> R<span class=\"token operator\">&gt;<\/span> implements EventListener<span class=\"token operator\">&lt;<\/span>E<span class=\"token operator\">&gt;<\/span> {\r\n    private <span class=\"token keyword\">Function<\/span><span class=\"token operator\">&lt;<\/span>E<span class=\"token punctuation\">,<\/span> R<span class=\"token operator\">&gt;<\/span> <span class=\"token keyword\">handler<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n\r\n    <span class=\"token keyword\">public<\/span> GenericEventListener<span class=\"token punctuation\">(<\/span><span class=\"token keyword\">Function<\/span><span class=\"token operator\">&lt;<\/span>E<span class=\"token punctuation\">,<\/span> R<span class=\"token operator\">&gt;<\/span> <span class=\"token keyword\">handler<\/span><span class=\"token punctuation\">)<\/span> {\r\n        this<span class=\"token punctuation\">.<\/span><span class=\"token keyword\">handler<\/span> <span class=\"token operator\">=<\/span> <span class=\"token keyword\">handler<\/span><span class=\"token punctuation\">;<\/span>\r\n    }\r\n\r\n\r\n    <span class=\"token variable\">@Override<\/span>\r\n    <span class=\"token keyword\">public<\/span> void onEvent<span class=\"token punctuation\">(<\/span>E event<span class=\"token punctuation\">)<\/span> {\r\n        R result <span class=\"token operator\">=<\/span> <span class=\"token keyword\">handler<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">apply<\/span><span class=\"token punctuation\">(<\/span>event<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        <span class=\"token comment\">\/\/ \u53ef\u4ee5\u6839\u636e\u9700\u8981\u5bf9\u7ed3\u679c\u8fdb\u884c\u5904\u7406<\/span>\r\n    }\r\n}<\/code><\/pre>\n<ul id=\"code_id_5\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<li>7.<\/li>\n<li>8.<\/li>\n<li>9.<\/li>\n<li>10.<\/li>\n<li>11.<\/li>\n<li>12.<\/li>\n<li>13.<\/li>\n<li>14.<\/li>\n<li>15.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2aGenericEventListener\u7c7b\uff0c\u5b83\u63a5\u53d7\u4e00\u4e2aFunction\u7c7b\u578b\u7684\u5904\u7406\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u3002\u5f53\u4e8b\u4ef6\u53d1\u751f\u65f6\uff0c\u6211\u4eec\u8c03\u7528\u5904\u7406\u51fd\u6570\u6765\u5904\u7406\u4e8b\u4ef6\uff0c\u5e76\u53ef\u4ee5\u6839\u636e\u9700\u8981\u5bf9\u7ed3\u679c\u8fdb\u884c\u5904\u7406\u3002<\/p>\n<p><strong>\u5f02\u6b65\u4efb\u52a1\u7684\u5904\u7406<\/strong><\/p>\n<p>\u5728\u7f16\u5199\u5f02\u6b65\u4efb\u52a1\u65f6\uff0c\u6211\u4eec\u7ecf\u5e38\u9700\u8981\u6307\u5b9a\u4efb\u52a1\u5b8c\u6210\u540e\u7684\u56de\u8c03\u51fd\u6570\u3002\u4f7f\u7528Function\u63a5\u53e3\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u4efb\u52a1\u548c\u5904\u7406\u7ed3\u679c\u89e3\u8026\uff0c\u4f7f\u5f97\u4ee3\u7801\u66f4\u52a0\u6e05\u6670\u548c\u6613\u4e8e\u7ef4\u62a4\u3002<\/p>\n<p>\u6bd4\u5982\uff0c\u6211\u4eec\u6709\u4e00\u4e2a\u6267\u884c\u5f02\u6b65\u4efb\u52a1\u7684\u63a5\u53e3\uff1a<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_6\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-sql\" tabindex=\"0\"><code class=\"language-sql\"><span class=\"token keyword\">public<\/span> interface AsyncTask<span class=\"token operator\">&lt;<\/span>T<span class=\"token punctuation\">,<\/span> R<span class=\"token operator\">&gt;<\/span> {\r\n    void <span class=\"token keyword\">execute<\/span><span class=\"token punctuation\">(<\/span>T input<span class=\"token punctuation\">,<\/span> Consumer<span class=\"token operator\">&lt;<\/span>R<span class=\"token operator\">&gt;<\/span> callback<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n}<\/code><\/pre>\n<ul id=\"code_id_6\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Function\u63a5\u53e3\u6765\u521b\u5efa\u4e00\u4e2a\u66f4\u52a0\u901a\u7528\u7684\u5f02\u6b65\u4efb\u52a1\u6267\u884c\u5668\uff1a<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_7\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-sql\" tabindex=\"0\"><code class=\"language-sql\"><span class=\"token keyword\">public<\/span> class GenericAsyncTask<span class=\"token operator\">&lt;<\/span>T<span class=\"token punctuation\">,<\/span> R<span class=\"token operator\">&gt;<\/span> implements AsyncTask<span class=\"token operator\">&lt;<\/span>T<span class=\"token punctuation\">,<\/span> R<span class=\"token operator\">&gt;<\/span> {\r\n    private ExecutorService executor<span class=\"token punctuation\">;<\/span>\r\n    private <span class=\"token keyword\">Function<\/span><span class=\"token operator\">&lt;<\/span>T<span class=\"token punctuation\">,<\/span> R<span class=\"token operator\">&gt;<\/span> task<span class=\"token punctuation\">;<\/span>\r\n\r\n\r\n    <span class=\"token keyword\">public<\/span> GenericAsyncTask<span class=\"token punctuation\">(<\/span>ExecutorService executor<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">Function<\/span><span class=\"token operator\">&lt;<\/span>T<span class=\"token punctuation\">,<\/span> R<span class=\"token operator\">&gt;<\/span> task<span class=\"token punctuation\">)<\/span> {\r\n        this<span class=\"token punctuation\">.<\/span>executor <span class=\"token operator\">=<\/span> executor<span class=\"token punctuation\">;<\/span>\r\n        this<span class=\"token punctuation\">.<\/span>task <span class=\"token operator\">=<\/span> task<span class=\"token punctuation\">;<\/span>\r\n    }\r\n\r\n\r\n    <span class=\"token variable\">@Override<\/span>\r\n    <span class=\"token keyword\">public<\/span> void <span class=\"token keyword\">execute<\/span><span class=\"token punctuation\">(<\/span>T input<span class=\"token punctuation\">,<\/span> Consumer<span class=\"token operator\">&lt;<\/span>R<span class=\"token operator\">&gt;<\/span> callback<span class=\"token punctuation\">)<\/span> {\r\n        executor<span class=\"token punctuation\">.<\/span>submit<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">-<\/span><span class=\"token operator\">&gt;<\/span> {\r\n            R result <span class=\"token operator\">=<\/span> task<span class=\"token punctuation\">.<\/span><span class=\"token keyword\">apply<\/span><span class=\"token punctuation\">(<\/span>input<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n            callback<span class=\"token punctuation\">.<\/span>accept<span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n        }<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n    }\r\n}<\/code><\/pre>\n<ul id=\"code_id_7\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<li>7.<\/li>\n<li>8.<\/li>\n<li>9.<\/li>\n<li>10.<\/li>\n<li>11.<\/li>\n<li>12.<\/li>\n<li>13.<\/li>\n<li>14.<\/li>\n<li>15.<\/li>\n<li>16.<\/li>\n<li>17.<\/li>\n<li>18.<\/li>\n<li>19.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2aGenericAsyncTask\u7c7b\uff0c\u5b83\u63a5\u53d7\u4e00\u4e2aFunction\u7c7b\u578b\u7684\u4efb\u52a1\u548c\u4e00\u4e2aExecutorService\u4f5c\u4e3a\u53c2\u6570\u3002\u5f53\u6267\u884c\u5f02\u6b65\u4efb\u52a1\u65f6\uff0c\u6211\u4eec\u63d0\u4ea4\u4e00\u4e2a\u4efb\u52a1\u5230\u7ebf\u7a0b\u6c60\u4e2d\uff0c\u5e76\u5728\u4efb\u52a1\u5b8c\u6210\u540e\u8c03\u7528\u56de\u8c03\u51fd\u6570\u6765\u5904\u7406\u7ed3\u679c\u3002<\/p>\n<p>&nbsp;<\/p>\n<h4>\u603b\u7ed3<\/h4>\n<p>Function\u63a5\u53e3\u662fJava8\u5f15\u5165\u7684\u4e00\u4e2a\u975e\u5e38\u5f3a\u608d\u7684\u65b0\u63a5\u53e3\uff0c\u5b83\u8ba9\u6211\u4eec\u80fd\u591f\u4ee5\u66f4\u52a0\u58f0\u660e\u5f0f\u7684\u65b9\u5f0f\u6765\u7f16\u5199\u4ee3\u7801\uff0c\u6781\u5927\u5730\u7b80\u5316\u4e86\u6211\u4eec\u7684\u5f00\u53d1\u5de5\u4f5c\u3002\u901a\u8fc7\u4e0a\u9762\u7684\u4f8b\u5b50\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230Function\u63a5\u53e3\u5728\u96c6\u5408\u7684\u8f6c\u6362\u3001\u4e8b\u4ef6\u7684\u76d1\u542c\u3001\u5f02\u6b65\u4efb\u52a1\u7684\u5904\u7406\u7b49\u573a\u666f\u4e2d\u7684\u5e7f\u6cdb\u5e94\u7528\u3002<\/p>\n<p>\u5c3d\u7ba1Function\u63a5\u53e3\u770b\u8d77\u6765\u5e76\u4e0d\u8d77\u773c\uff0c\u4f46\u5b83\u7684\u5b9e\u9645\u5e94\u7528\u4ef7\u503c\u5374\u8fdc\u8fdc\u8d85\u51fa\u4e86\u6211\u4eec\u7684\u60f3\u8c61\u3002\u5b83\u8ba9\u6211\u4eec\u80fd\u591f\u4ee5\u66f4\u52a0\u7075\u6d3b\u548c\u53ef\u6269\u5c55\u7684\u65b9\u5f0f\u6765\u7f16\u5199\u4ee3\u7801\uff0c\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u56e0\u6b64\uff0c\u6211\u5f3a\u70c8\u5efa\u8bae\u4f60\u5728\u65e5\u5e38\u5f00\u53d1\u4e2d\u591a\u591a\u5c1d\u8bd5\u4f7f\u7528Function\u63a5\u53e3\uff0c\u76f8\u4fe1\u5b83\u4e00\u5b9a\u4f1a\u7ed9\u4f60\u5e26\u6765\u610f\u60f3\u4e0d\u5230\u7684\u6536\u83b7\u3002<\/p>\n<\/div>\n<\/div>\n<div 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