{"id":202877,"date":"2025-05-22T08:14:57","date_gmt":"2025-05-22T00:14:57","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202877\/"},"modified":"2025-05-22T08:14:57","modified_gmt":"2025-05-22T00:14:57","slug":"java%e5%87%bd%e6%95%b0%e4%b8%ad%e5%a4%9a%e7%ba%bf%e7%a8%8b%e7%8e%af%e5%a2%83%e4%b8%8b%e4%bc%98%e5%8c%96%e5%86%85%e5%ad%98%e4%bd%bf%e7%94%a8%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a1%b9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202877\/","title":{"rendered":"Java\u51fd\u6570\u4e2d\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\u4f18\u5316\u5185\u5b58\u4f7f\u7528\u7684\u6ce8\u610f\u4e8b\u9879"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java\u51fd\u6570\u4e2d\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\u4f18\u5316\u5185\u5b58\u4f7f\u7528\u7684\u6ce8\u610f\u4e8b\u9879<\/h1>\n<p>\u76ee\u524d\u4e0a\u5df2\u7ecf\u6709\u5f88\u591a\u5173\u4e8e<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u7684\u6587\u7ae0\u4e86\uff0c\u81ea\u5df1\u5728\u521d\u6b21\u9605\u8bfb\u8fd9\u4e9b\u6587\u7ae0\u4e2d\uff0c\u4e5f\u89c1\u8bc6\u5230\u4e86\u5f88\u591a\u5b66\u4e60\u601d\u8def\uff1b\u90a3\u4e48\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aJava\u51fd\u6570\u4e2d\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\u4f18\u5316\u5185\u5b58\u4f7f\u7528\u7684\u6ce8\u610f\u4e8b\u9879\u300b<\/span>\uff0c\u4e5f\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff0c\u5982\u679c\u9605\u8bfb\u5b8c\u540e\u771f\u7684\u5bf9\u4f60\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u6709\u5e2e\u52a9\uff0c\u6b22\u8fce\u52a8\u52a8\u624b\u6307\uff0c\u8bc4\u8bba\u7559\u8a00\u5e76\u5206\u4eab~<\/p>\n<p>\u4f18\u5316 Java \u51fd\u6570\u4e2d\u7684\u5185\u5b58\u4f7f\u7528\uff1a\u907f\u514d\u4f7f\u7528\u4e0d\u53ef\u53d8\u5bf9\u8c61\uff1a\u4f18\u5148\u4f7f\u7528\u53ef\u53d8\u5bf9\u8c61\uff0c\u51cf\u5c11\u521b\u5efa\u65b0\u5bf9\u8c61\u7684\u5f00\u9500\u3002\u4f7f\u7528\u7ebf\u7a0b\u5c40\u90e8\u53d8\u91cf\uff1a\u5b58\u50a8\u7ebf\u7a0b\u7279\u6709\u7684\u6570\u636e\uff0c\u51cf\u5c11\u5171\u4eab\u5185\u5b58\u8bbf\u95ee\uff0c\u63d0\u9ad8\u6027\u80fd\u3002\u8c28\u614e\u4f7f\u7528\u540c\u6b65\uff1a\u4ec5\u5728\u5fc5\u8981\u65f6\u4f7f\u7528\u540c\u6b65\uff0c\u9009\u62e9\u8f7b\u91cf\u7ea7\u673a\u5236\uff0c\u51cf\u5c11\u5185\u5b58\u5f00\u9500\u3002\u4f18\u5316\u7b97\u6cd5\uff1a\u901a\u8fc7\u6539\u8fdb\u7b97\u6cd5\u6765\u51cf\u5c11\u8ba1\u7b97\u5f00\u9500\uff0c\u4f8b\u5982\u4f7f\u7528 Sieve of Eratosthenes \u7b97\u6cd5\u8ba1\u7b97\u7d20\u6570\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729953813671d00154213a.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u51fd\u6570\u4e2d\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\u4f18\u5316\u5185\u5b58\u4f7f\u7528\u7684\u6ce8\u610f\u4e8b\u9879<\/strong><\/p>\n<p>\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\uff0c\u5185\u5b58\u7ba1\u7406\u81f3\u5173\u91cd\u8981\u3002\u5982\u679c\u4e0d\u52a0\u4ee5\u4f18\u5316\uff0c\u53ef\u80fd\u5bfc\u81f4\u5e94\u7528\u7a0b\u5e8f\u6027\u80fd\u4f4e\u4e0b\uff0c\u751a\u81f3\u5d29\u6e83\u3002\u4ee5\u4e0b\u662f Java \u51fd\u6570\u4e2d\u4f18\u5316\u5185\u5b58\u4f7f\u7528\u7684\u6ce8\u610f\u4e8b\u9879\uff1a<\/p>\n<ul>\n<li><strong>\u907f\u514d\u4f7f\u7528\u4e0d\u53ef\u53d8\u5bf9\u8c61\uff1a<\/strong>\u4e0d\u53ef\u53d8\u5bf9\u8c61\uff08\u5982 String \u548c Integer\uff09\u5728\u5185\u5b58\u4e2d\u521b\u5efa\u540e\u65e0\u6cd5\u4fee\u6539\uff0c\u4f46\u6bcf\u6b21\u5bf9\u5b83\u4eec\u5e94\u7528\u64cd\u4f5c\uff08\u5982\u8f6c\u6362\u3001\u62fc\u63a5\uff09\u65f6\uff0c\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u5bf9\u8c61\u3002\u4e3a\u4e86\u4f18\u5316\u5185\u5b58\u4f7f\u7528\uff0c\u8bf7\u8003\u8651\u4f7f\u7528\u53ef\u53d8\u5bf9\u8c61\uff0c\u4f8b\u5982 StringBuilder\u3002<\/li>\n<li><strong>\u4f7f\u7528\u7ebf\u7a0b\u5c40\u90e8\u53d8\u91cf\uff1a<\/strong>\u7ebf\u7a0b\u5c40\u90e8\u53d8\u91cf\u5b58\u50a8\u5728\u6bcf\u4e2a\u7ebf\u7a0b\u7684\u5185\u5b58\u4e2d\uff0c\u4ece\u800c\u51cf\u5c11\u4e86\u5bf9\u5171\u4eab\u5185\u5b58\u7684\u8bbf\u95ee\uff0c\u4ece\u800c\u63d0\u9ad8\u4e86\u6027\u80fd\u548c\u5b89\u5168\u6027\u3002\u53ef\u4ee5\u4f7f\u7528 <code>ThreadLocal<\/code> \u7c7b\u521b\u5efa\u548c\u4f7f\u7528\u7ebf\u7a0b\u5c40\u90e8\u53d8\u91cf\u3002<\/li>\n<li><strong>\u4ed4\u7ec6\u7ba1\u7406\u540c\u6b65\uff1a<\/strong>\u540c\u6b65\u539f\u8bed\uff0c\u4f8b\u5982\u9501\uff0c\u53ef\u7528\u4e8e\u63a7\u5236\u5bf9\u5171\u4eab\u8d44\u6e90\u7684\u8bbf\u95ee\u3002\u7136\u800c\uff0c\u8fc7\u5ea6\u6216\u4e0d\u6070\u5f53\u7684\u540c\u6b65\u4f1a\u663e\u8457\u589e\u52a0\u5185\u5b58\u5f00\u9500\u3002\u4ec5\u5728\u7edd\u5bf9\u5fc5\u8981\u65f6\u4f7f\u7528\u540c\u6b65\uff0c\u5e76\u9009\u62e9\u6700\u9002\u5408\u6240\u8ba8\u8bba\u573a\u666f\u7684\u8f7b\u91cf\u7ea7\u540c\u6b65\u673a\u5236\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u6848\u4f8b\uff1a<\/strong><\/p>\n<p>\u8003\u8651\u4ee5\u4e0b\u8ba1\u7b97\u7d20\u6570\u7684\u51fd\u6570\uff1a<\/p>\n<pre>import java.util.List;\n\npublic class PrimeFinder {\n\n    public static List&lt;Integer&gt; findPrimes(int limit) {\n        List&lt;Integer&gt; primes = new ArrayList&lt;&gt;();\n\n        for (int i = 2; i &lt;= limit; i++) {\n            boolean isPrime = true;\n\n            for (int j = 2; j &lt;= i \/ 2; j++) {\n                if (i % j == 0) {\n                    isPrime = false;\n                    break;\n                }\n            }\n\n            if (isPrime) {\n                primes.add(i);\n            }\n        }\n\n        return primes;\n    }\n}<\/pre>\n<p>\u8be5\u51fd\u6570\u5bf9\u6bcf\u4e2a\u6570\u5b57\u8fdb\u884c\u4e86\u5927\u91cf\u4e0d\u5fc5\u8981\u7684\u8ba1\u7b97\uff0c\u56e0\u4e3a\u8be5\u6570\u5b57\u662f\u5426\u4e3a\u7d20\u6570\u53ea\u53d6\u51b3\u4e8e\u5176\u672c\u8eab\u548c\u5b83\u7684\u4e00\u534a\u4ee5\u4e0b\u7684\u6570\u5b57\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 Sieve of Eratosthenes \u7b97\u6cd5\u6765\u4f18\u5316\u6b64\u8fc7\u7a0b\uff0c\u8be5\u7b97\u6cd5\u5728\u4e00\u4e2a\u7ef4\u62a4\u6807\u8bb0\u7684 boolean \u6570\u7ec4\u4e2d\u8ddf\u8e2a\u5df2\u8ba1\u7b97\u7684\u7d20\u6570\u3002<\/p>\n<pre>import java.util.List;\nimport java.util.Arrays;\n\npublic class PrimeFinder {\n\n    public static List&lt;Integer&gt; findPrimes(int limit) {\n        boolean[] isPrime = new boolean[limit + 1];\n        Arrays.fill(isPrime, true);\n\n        for (int i = 2; i &lt;= Math.sqrt(limit); i++) {\n            if (isPrime[i]) {\n                for (int j = i * i; j &lt;= limit; j += i) {\n                    isPrime[j] = false;\n                }\n            }\n        }\n\n        List&lt;Integer&gt; primes = new ArrayList&lt;&gt;();\n\n        for (int i = 2; i &lt;= limit; i++) {\n            if (isPrime[i]) {\n                primes.add(i);\n            }\n        }\n\n        return primes;\n    }\n}<\/pre>\n<p>\u901a\u8fc7\u907f\u514d\u5bf9\u6bcf\u4e2a\u6570\u5b57\u8fdb\u884c\u91cd\u590d\u8ba1\u7b97\uff0c\u6b64\u4f18\u5316\u6280\u672f\u663e\u8457\u51cf\u5c11\u4e86\u5185\u5b58\u5f00\u9500\u3002<\/p>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aJava\u51fd\u6570\u4e2d\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\u4f18\u5316\u5185\u5b58\u4f7f\u7528\u7684\u6ce8\u610f\u4e8b\u9879\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u51fd\u6570\u4e2d\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\u4f18\u5316\u5185&#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-202877","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202877","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=202877"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202877\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202877"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202877"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202877"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}