{"id":202519,"date":"2025-05-22T09:07:17","date_gmt":"2025-05-22T01:07:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202519\/"},"modified":"2025-05-22T09:07:17","modified_gmt":"2025-05-22T01:07:17","slug":"%e5%88%a9%e7%94%a8-java-%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e6%8f%90%e5%8d%87%e6%80%a7%e8%83%bd","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202519\/","title":{"rendered":"\u5229\u7528 Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u63d0\u5347\u6027\u80fd"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u5229\u7528 Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u63d0\u5347\u6027\u80fd<\/h1>\n<p>\u5c0f\u4f19\u4f34\u4eec\u6709\u6ca1\u6709\u89c9\u5f97\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u5f88\u6709\u610f\u601d\uff1f\u6709\u610f\u601d\u5c31\u5bf9\u4e86\uff01\u4eca\u5929\u5c31\u7ed9\u5927\u5bb6\u5e26\u6765<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u5229\u7528 Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u63d0\u5347\u6027\u80fd\u300b<\/span>\uff0c\u4ee5\u4e0b\u5185\u5bb9\u5c06\u4f1a\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\uff0c\u82e5\u662f\u5728\u5b66\u4e60\u4e2d\u5bf9\u5176\u4e2d\u90e8\u5206\u77e5\u8bc6\u70b9\u6709\u7591\u95ee\uff0c\u6216\u8bb8\u770b\u4e86\u672c\u6587\u5c31\u80fd\u5e2e\u5230\u4f60\uff01<\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u63d0\u5347\u6027\u80fd\u4ec0\u4e48\u662f\u51fd\u6570\u5f0f\u7f16\u7a0b\uff1f\u5f3a\u8c03\u4e0d\u53ef\u53d8\u6570\u636e\u548c\u9ad8\u9636\u51fd\u6570\u7684\u4f7f\u7528\uff0c\u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027\u3001\u53ef\u7ef4\u62a4\u6027\u548c\u6027\u80fd\u3002Java \u4e2d\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\uff1a\u5f15\u5165 Lambda \u8868\u8fbe\u5f0f\u3001Stream API \u548c\u5305\u88c5\u7c7b\uff0c\u63d0\u4f9b\u51fd\u6570\u5f0f\u7f16\u7a0b\u5de5\u5177\u3002\u5b9e\u6218\u6848\u4f8b\uff1a\u5e76\u884c\u5904\u7406\u5927\u6587\u4ef6\uff0c\u5229\u7528\u51fd\u6570\u5f0f\u65b9\u6cd5\u663e\u7740\u63d0\u9ad8\u5904\u7406\u6027\u80fd\uff0c\u51cf\u5c11\u5904\u7406\u65f6\u95f4\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729913672671c63486117b.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5229\u7528 Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u63d0\u5347\u6027\u80fd<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u662f\u4e00\u79cd\u7f16\u7a0b\u8303\u5f0f\uff0c\u5f3a\u8c03\u4f7f\u7528\u4e0d\u53ef\u53d8\u6570\u636e\u548c\u9ad8\u9636\u51fd\u6570\u6765\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u3001\u53ef\u7ef4\u62a4\u6027\u548c\u6027\u80fd\u3002<\/p>\n<p><strong>\u4ec0\u4e48\u662f\u51fd\u6570\u5f0f\u7f16\u7a0b\uff1f<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u5173\u952e\u6982\u5ff5\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u4e0d\u53ef\u53d8\u6570\u636e\uff1a<\/strong> \u6570\u636e\u4e0d\u80fd\u88ab\u4fee\u6539\uff0c\u8fd9\u6d88\u9664\u4e86\u5e76\u53d1\u95ee\u9898\u5e76\u7b80\u5316\u4e86\u63a8\u7406\u3002<\/li>\n<li><strong>\u9ad8\u9636\u51fd\u6570\uff1a<\/strong> \u51fd\u6570\u53ef\u4ee5\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u5176\u4ed6\u51fd\u6570\u6216\u8fd4\u56de\u51fd\u6570\uff0c\u4ece\u800c\u521b\u5efa\u7075\u6d3b\u4e14\u53ef\u91cd\u7528\u7684\u4ee3\u7801\u3002<\/li>\n<\/ul>\n<p><strong>Java \u4e2d\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b<\/strong><\/p>\n<p>Java 8 \u5f15\u5165\u4e86\u51fd\u6570\u5f0f\u7f16\u7a0b\u7279\u6027\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>Lambda \u8868\u8fbe\u5f0f\uff1a<\/strong> \u533f\u540d\u51fd\u6570\uff0c\u53ef\u4ee5\u7b80\u5316\u5e38\u89c1\u4efb\u52a1\u7684\u4ee3\u7801\u3002<\/li>\n<li><strong>Stream API\uff1a<\/strong> \u7528\u4e8e\u5e76\u884c\u5904\u7406\u5927\u578b\u6570\u636e\u96c6\u7684\u96c6\u5408\u63a5\u53e3\u3002<\/li>\n<li><strong>\u5305\u88c5\u7c7b\uff1a<\/strong> \u63d0\u4f9b\u4e86\u4e0d\u53ef\u53d8\u96c6\u5408\u548c\u53ef\u9009\u7c7b\u578b\u7b49\u51fd\u6570\u5f0f\u7f16\u7a0b\u5de5\u5177\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u6848\u4f8b\uff1a\u5e76\u884c\u5904\u7406\u5927\u6587\u4ef6<\/strong><\/p>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u5305\u542b\u6570\u767e\u4e07\u884c\u7684\u5927\u6587\u4ef6\uff0c\u9700\u8981\u5bf9\u5176\u8fdb\u884c\u5904\u7406\u3002\u4f20\u7edf\u65b9\u6cd5\u9700\u8981\u591a\u6b21\u5faa\u73af\u548c\u624b\u52a8\u7ebf\u7a0b\u7ba1\u7406\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5f88\u6162\u4e14\u5bb9\u6613\u51fa\u9519\u3002<\/p>\n<p><strong>\u51fd\u6570\u5f0f\u65b9\u6cd5\uff1a<\/strong><\/p>\n<pre>import java.nio.file.Files;\nimport java.nio.file.Paths;\nimport java.util.Arrays;\nimport java.util.stream.Stream;\n\npublic class FileProcessor {\n\n    public static void main(String[] args) {\n        try (Stream&lt;String&gt; lines = Files.lines(Paths.get(\"largefile.txt\"))) {\n            long wordCount = lines\n                    .flatMap(line -&gt; Arrays.stream(line.split(\" \")))\n                    .count();\n            System.out.println(\"Word count: \" + wordCount);\n        } catch (Exception e) {\n            System.err.println(\"Error processing file: \" + e.getMessage());\n        }\n    }\n}<\/pre>\n<p>\u8fd9\u6bb5\u4ee3\u7801\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u7279\u6027\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>Files.lines()<\/code> \u521b\u5efa\u4e00\u4e2a <code>Stream<\/code> \u6765\u8bfb\u53d6\u6587\u4ef6\u884c\u3002<\/li>\n<li><code>flatMap()<\/code> \u5c55\u5e73\u6d41\uff0c\u5c06\u6bcf\u4e2a\u884c\u7684\u5355\u8bcd\u8f6c\u6362\u4e3a\u5355\u8bcd\u6d41\u3002<\/li>\n<li><code>count()<\/code> \u8ba1\u7b97\u5355\u8bcd\u7684\u6570\u91cf\uff08\u5e76\u884c\u6267\u884c\uff09\u3002<\/li>\n<\/ul>\n<p><strong>\u6027\u80fd\u63d0\u5347<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u65b9\u6cd5\u5229\u7528 Java \u7684 Stream API \u5e76\u884c\u6267\u884c\u64cd\u4f5c\uff0c\u4ece\u800c\u663e\u7740\u63d0\u9ad8\u4e86\u5927\u6587\u4ef6\u5904\u7406\u7684\u6027\u80fd\u3002\u4e0e\u4f20\u7edf\u65b9\u6cd5\u76f8\u6bd4\uff0c\u5b83\u53ef\u4ee5\u5c06\u5904\u7406\u65f6\u95f4\u51cf\u5c11\u6570\u500d\u3002<\/p>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p>Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u901a\u8fc7\u5229\u7528\u5e76\u884c\u5904\u7406\u548c\u4e0d\u53ef\u53d8\u6570\u636e\u6765\u63d0\u5347\u4ee3\u7801\u6027\u80fd\u3002\u901a\u8fc7\u91c7\u7528\u51fd\u6570\u5f0f\u6982\u5ff5\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u521b\u5efa\u9ad8\u6548\u3001\u53ef\u8bfb\u4e14\u53ef\u7ef4\u62a4\u7684\u4ee3\u7801\u3002<\/p>\n<p>\u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8e\u6587\u7ae0\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5229\u7528 Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u63d0\u5347\u6027&#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-202519","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202519","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=202519"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202519\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202519"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202519"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202519"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}