{"id":202875,"date":"2025-05-22T09:09:31","date_gmt":"2025-05-22T01:09:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202875\/"},"modified":"2025-05-22T09:09:31","modified_gmt":"2025-05-22T01:09:31","slug":"java%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e7%9a%84%e6%80%a7%e8%83%bd%e5%a6%82%e4%bd%95%e5%bd%b1%e5%93%8d%e6%95%b0%e6%8d%ae%e5%a4%84%e7%90%86%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202875\/","title":{"rendered":"Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u6027\u80fd\u5982\u4f55\u5f71\u54cd\u6570\u636e\u5904\u7406\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u6027\u80fd\u5982\u4f55\u5f71\u54cd\u6570\u636e\u5904\u7406\uff1f<\/h1>\n<p>\u4f60\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\u5417\uff1f\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aJava\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u6027\u80fd\u5982\u4f55\u5f71\u54cd\u6570\u636e\u5904\u7406\uff1f\u300b<\/span>\uff0c\u4e3b\u8981\u4ecb\u7ecd\u7684\u5185\u5bb9\u5c31\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\uff0c\u5982\u679c\u4f60\u60f3\u63d0\u5347\u81ea\u5df1\u7684\u5f00\u53d1\u80fd\u529b\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5927\u5bb6\u8981\u77e5\u9053\u7f16\u7a0b\u7406\u8bba\u57fa\u7840\u548c\u5b9e\u6218\u64cd\u4f5c\u90fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u54e6\uff01<\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u5bf9 Java \u6570\u636e\u5904\u7406\u6027\u80fd\u7684\u5f71\u54cd\uff1a\u96c6\u5408\u64cd\u4f5c\uff1a\u4e0d\u53ef\u53d8\u96c6\u5408\u63d0\u9ad8\u7ebf\u7a0b\u5b89\u5168\u6027\u4f46\u521b\u5efa\u65b0\u96c6\u5408\u6210\u672c\u9ad8\u3002\u6d41\u5f0f\u5904\u7406\uff1a\u975e\u963b\u585e\u65b9\u5f0f\u5904\u7406\u6570\u636e\uff0c\u51cf\u5c11\u5185\u5b58\u6d88\u8017\u548c\u5904\u7406\u65f6\u95f4\u3002\u5b9e\u8df5\u6848\u4f8b\uff1a\u6587\u4ef6\u89e3\u6790\uff1a\u51fd\u6570\u5f0f\u7f16\u7a0b\u901a\u8fc7\u6d41\u5f0f\u5904\u7406\u5728\u5904\u7406\u5927\u6587\u4ef6\u65f6\u6027\u80fd\u66f4\u4f73\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729953693671cff9d3f451.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u6027\u80fd\u5bf9\u6570\u636e\u5904\u7406\u7684\u5f71\u54cd<\/strong><\/p>\n<p><strong>\u5f15\u8a00<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u5f0f\u8fd1\u5e74\u6765\u5728 Java \u4e2d\u5f97\u5230\u4e86\u8d8a\u6765\u8d8a\u5e7f\u6cdb\u7684\u5e94\u7528\u3002\u5b83\u63d0\u4f9b\u4e86\u8bb8\u591a\u4f18\u52bf\uff0c\u5305\u62ec\u63d0\u9ad8\u4ee3\u7801\u7b80\u6d01\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u4f46\u662f\uff0c\u5bf9\u4e8e\u6570\u636e\u5904\u7406\u5e94\u7528\u7a0b\u5e8f\u6765\u8bf4\uff0c\u4e86\u89e3\u51fd\u6570\u5f0f\u7f16\u7a0b\u5bf9\u6027\u80fd\u7684\u5f71\u54cd\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<p><strong>\u96c6\u5408\u64cd\u4f5c<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u4f7f\u7528\u4e0d\u53ef\u53d8\u96c6\u5408\u548c lambda \u8868\u8fbe\u5f0f\u6765\u5904\u7406\u6570\u636e\u3002\u4e0e\u4f20\u7edf\u96c6\u5408\u65b9\u6cd5\u76f8\u6bd4\uff0c\u8fd9\u5e26\u6765\u4e86\u4ee5\u4e0b\u6027\u80fd\u5f71\u54cd\uff1a<\/p>\n<ul>\n<li><strong>\u4f18\u52bf\uff1a<\/strong>\u4e0d\u53ef\u53d8\u96c6\u5408\u53ef\u4ee5\u9632\u6b62\u610f\u5916\u4fee\u6539\u6570\u636e\uff0c\u4ece\u800c\u907f\u514d\u4e86\u5e76\u53d1\u95ee\u9898\u5e76\u63d0\u4f9b\u4e86\u7ebf\u7a0b\u5b89\u5168\u6027\u3002<\/li>\n<li><strong>\u52a3\u52bf\uff1a<\/strong>\u521b\u5efa\u65b0\u96c6\u5408\u53ef\u80fd\u662f\u6602\u8d35\u7684\uff0c\u5c24\u5176\u662f\u5bf9\u4e8e\u5927\u6570\u636e\u96c6\u3002<\/li>\n<\/ul>\n<p><strong>\u6d41\u5f0f\u5904\u7406<\/strong><\/p>\n<p>\u6d41\u5f0f\u5904\u7406\u662f\u4e00\u79cd\u5904\u7406\u6570\u636e\u7684\u975e\u963b\u585e\u65b9\u6cd5\uff0c\u5229\u7528 lazy evaluation \u5ef6\u8fdf\u64cd\u4f5c\u6267\u884c\u3002\u8fd9\u5728\u5904\u7406\u5927\u578b\u6570\u636e\u96c6\u65f6\u53ef\u4ee5\u5e26\u6765\u663e\u8457\u7684\u6027\u80fd\u4f18\u52bf\uff1a<\/p>\n<ul>\n<li><strong>\u4f18\u52bf\uff1a<\/strong>\u6d41\u5f0f\u5904\u7406\u907f\u514d\u4e86\u5728\u5185\u5b58\u4e2d\u6301\u6709\u6574\u4e2a\u6570\u636e\u96c6\u5408\uff0c\u4ece\u800c\u51cf\u5c11\u4e86\u5185\u5b58\u6d88\u8017\u548c\u5904\u7406\u65f6\u95f4\u3002<\/li>\n<li><strong>\u52a3\u52bf\uff1a<\/strong>\u5bf9\u4e8e\u9700\u8981\u591a\u6b21\u8bbf\u95ee\u6570\u636e\u7684\u64cd\u4f5c\uff0c\u6d41\u5f0f\u5904\u7406\u53ef\u80fd\u4e0d\u9002\u5408\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u8df5\u6848\u4f8b\uff1a\u6587\u4ef6\u89e3\u6790<\/strong><\/p>\n<p>\u8003\u8651\u4ee5\u4e0b\u4f7f\u7528\u4f20\u7edf\u96c6\u5408\u548c\u51fd\u6570\u5f0f\u7f16\u7a0b\u5904\u7406\u6587\u4ef6\u6570\u636e\u7684\u6848\u4f8b\uff1a<\/p>\n<p><strong>\u4f20\u7edf\u96c6\u5408<\/strong><\/p>\n<pre>import java.nio.file.Files;\nimport java.nio.file.Paths;\nimport java.util.ArrayList;\nimport java.util.Arrays;\nimport java.util.List;\n\npublic class FileParserTraditional {\n\n    public static void main(String[] args) {\n        String filePath = \"my_file.txt\";\n\n        try {\n            \/\/ \u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\u5e76\u5206\u914d\u5230 List&lt;String&gt;\n            List&lt;String&gt; lines = new ArrayList&lt;&gt;(Files.readAllLines(Paths.get(filePath)));\n\n            \/\/ \u9010\u884c\u5904\u7406\u6570\u636e\n            for (String line : lines) {\n                \/\/ \u5e94\u7528\u4e1a\u52a1\u903b\u8f91\n            }\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n    }\n}<\/pre>\n<p><strong>\u51fd\u6570\u5f0f\u7f16\u7a0b<\/strong><\/p>\n<pre>import java.nio.file.Files;\nimport java.nio.file.Paths;\nimport java.util.stream.Stream;\n\npublic class FileParserFunctional {\n\n    public static void main(String[] args) {\n        String filePath = \"my_file.txt\";\n\n        try {\n            \/\/ \u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\u5e76\u521b\u5efa Stream&lt;String&gt;\n            Stream&lt;String&gt; lines = Files.lines(Paths.get(filePath));\n\n            \/\/ \u5e94\u7528\u4e1a\u52a1\u903b\u8f91\n            lines.forEach(line -&gt; {\n                \/\/ \u5e94\u7528\u4e1a\u52a1\u903b\u8f91\n            });\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n    }\n}<\/pre>\n<p>\u5728\u5904\u7406\u5927\u6587\u4ef6\u65f6\uff0c\u51fd\u6570\u5f0f\u7f16\u7a0b\u901a\u8fc7\u6d41\u5f0f\u5904\u7406\u51cf\u5c11\u4e86\u5185\u5b58\u6d88\u8017\u548c\u5904\u7406\u65f6\u95f4\uff0c\u4ece\u800c\u5b9e\u73b0\u4e86\u66f4\u597d\u7684\u6027\u80fd\u3002<\/p>\n<p>\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300aJava\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u6027\u80fd\u5982\u4f55\u5f71\u54cd\u6570\u636e\u5904\u7406\uff1f\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6587\u7ae0\u77e5\u8bc6\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u6027\u80fd\u5982\u4f55\u5f71\u54cd&#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-202875","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202875","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=202875"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202875\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202875"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202875"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202875"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}