{"id":202888,"date":"2025-05-22T09:04:34","date_gmt":"2025-05-22T01:04:34","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202888\/"},"modified":"2025-05-22T09:04:34","modified_gmt":"2025-05-22T01:04:34","slug":"%e5%87%bd%e6%95%b0%e5%bc%8fjava%e7%bc%96%e7%a8%8b%e5%a6%82%e4%bd%95%e5%8a%a9%e5%8a%9b%e5%9b%be%e5%83%8f%e5%a4%84%e7%90%86%e7%ae%97%e6%b3%95%e5%8a%a0%e9%80%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202888\/","title":{"rendered":"\u51fd\u6570\u5f0fJava\u7f16\u7a0b\u5982\u4f55\u52a9\u529b\u56fe\u50cf\u5904\u7406\u7b97\u6cd5\u52a0\u901f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u51fd\u6570\u5f0fJava\u7f16\u7a0b\u5982\u4f55\u52a9\u529b\u56fe\u50cf\u5904\u7406\u7b97\u6cd5\u52a0\u901f<\/h1>\n<p>\u5927\u5bb6\u597d\uff0c\u6211\u4eec\u53c8\u89c1\u9762\u4e86\u554a~\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u51fd\u6570\u5f0fJava\u7f16\u7a0b\u5982\u4f55\u52a9\u529b\u56fe\u50cf\u5904\u7406\u7b97\u6cd5\u52a0\u901f\u300b<\/span>\u7684\u5185\u5bb9\u4e2d\u5c06\u4f1a\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u3002\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u76f8\u5173\u77e5\u8bc6\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\uff0c\u4ee5\u540e\u4f1a\u7ed9\u5927\u5bb6\u5e26\u6765\u66f4\u591a<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u76f8\u5173\u6587\u7ae0\uff0c\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u8fdb\u6b65\uff01\u4e0b\u9762\u5c31\u5f00\u59cb\u672c\u6587\u7684\u6b63\u5f0f\u5185\u5bb9~<\/p>\n<p>\u51fd\u6570\u5f0f Java \u7f16\u7a0b (FJP) \u901a\u8fc7\u4e0d\u53ef\u53d8\u6027\u548c\u7eaf\u51fd\u6570\u7684\u6982\u5ff5\uff0c\u663e\u8457\u63d0\u9ad8\u4e86\u56fe\u50cf\u5904\u7406\u7b97\u6cd5\u7684\u6548\u7387\u3002FJP \u5177\u6709\u5e76\u884c\u6027\u3001\u53ef\u7ec4\u5408\u6027\u548c\u7b80\u6d01\u6027\u4f18\u52bf\uff0c\u5728\u5b9e\u6218\u4e2d\uff0cFJP \u9ad8\u65af\u6a21\u7cca\u7b97\u6cd5\u7684\u6027\u80fd\u660e\u663e\u4f18\u4e8e\u4f20\u7edf\u7684\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u5b9e\u73b0\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241027\/1729988675671d884353f87.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u51fd\u6570\u5f0f Java \u7f16\u7a0b\u5982\u4f55\u52a9\u529b\u56fe\u50cf\u5904\u7406\u7b97\u6cd5\u52a0\u901f<\/strong><\/p>\n<p><strong>\u5f15\u8a00<\/strong><\/p>\n<p>\u56fe\u50cf\u5904\u7406\u7b97\u6cd5\u5728\u8ba1\u7b97\u673a\u89c6\u89c9\u548c\u56fe\u5f62\u5904\u7406\u9886\u57df\u81f3\u5173\u91cd\u8981\u3002\u4f20\u7edf\u7684\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b (OOP) \u6280\u672f\u53ef\u80fd\u4f1a\u5bfc\u81f4\u590d\u6742\u6027\u548c\u4ee3\u7801\u5197\u4f59\uff0c\u4ece\u800c\u5f71\u54cd\u7b97\u6cd5\u7684\u6548\u7387\u3002\u51fd\u6570\u5f0f Java \u7f16\u7a0b (FJP) \u662f\u4e00\u79cd\u66ff\u4ee3\u65b9\u6cd5\uff0c\u5b83\u53ef\u4ee5\u663e\u7740\u63d0\u9ad8\u56fe\u50cf\u5904\u7406\u6027\u80fd\u3002<\/p>\n<p><strong>\u51fd\u6570\u5f0f Java \u7f16\u7a0b\u7684\u57fa\u672c\u539f\u7406<\/strong><\/p>\n<p>FJP \u7684\u6838\u5fc3\u6982\u5ff5\u662f<strong>\u4e0d\u53ef\u53d8\u6027<\/strong>\uff0c\u8fd9\u8981\u6c42\u5bf9\u8c61\u5728\u521b\u5efa\u540e\u4e0d\u80fd\u88ab\u4fee\u6539\u3002\u53e6\u4e00\u4e2a\u5173\u952e\u6982\u5ff5\u662f<strong>\u7eaf\u51fd\u6570<\/strong>\uff0c\u5373\u51fd\u6570\u4e0d\u4f1a\u4ea7\u751f\u526f\u4f5c\u7528\uff08\u4f8b\u5982\uff0c\u4fee\u6539\u72b6\u6001\u6216\u8f93\u51fa\uff09\uff0c\u5e76\u4e14\u4ec5\u53d6\u51b3\u4e8e\u5176\u8f93\u5165\u3002<\/p>\n<p><strong>FJP \u7684\u4f18\u52bf<\/strong><\/p>\n<ul>\n<li><strong>\u5e76\u884c\u6027\uff1a<\/strong>\u7eaf\u51fd\u6570\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u56e0\u6b64\u53ef\u4ee5\u8f7b\u677e\u5e76\u884c\u6267\u884c\u3002<\/li>\n<li><strong>\u53ef\u7ec4\u5408\u6027\uff1a<\/strong>\u51fd\u6570\u53ef\u4ee5\u8f7b\u677e\u7ec4\u5408\uff0c\u5f62\u6210\u66f4\u590d\u6742\u7684\u7b97\u6cd5\u3002<\/li>\n<li><strong>\u7b80\u6d01\u6027\uff1a<\/strong>FJP \u503e\u5411\u4e8e\u4ea7\u751f\u66f4\u7b80\u6d01\u3001\u66f4\u6613\u8bfb\u7684\u4ee3\u7801\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u4e3a\u4e86\u8bf4\u660e FJP \u7684\u597d\u5904\uff0c\u8ba9\u6211\u4eec\u5b9e\u73b0\u4e00\u4e2a\u9ad8\u65af\u6a21\u7cca\u7b97\u6cd5\uff1a<\/p>\n<pre>import java.util.stream.IntStream;\n\npublic class GaussianBlur {\n\n    static int[][] gaussBlur(int[][] pixels, int radius) {\n\n        \/\/ \u8ba1\u7b97\u9ad8\u65af\u6743\u91cd\n        int[] weights = IntStream.range(0, radius + 1).map(i -&gt; (int) (1 \/ (2 * Math.PI * radius * radius) * Math.exp(-i * i \/ (2 * radius * radius)))).toArray();\n\n        \/\/ \u5e94\u7528\u6743\u91cd\n        int[][] blurredPixels = new int[pixels.length][pixels[0].length];\n        for (int y = 0; y &lt; pixels.length; y++) {\n            for (int x = 0; x &lt; pixels[0].length; x++) {\n                int sum = 0;\n                for (int i = -radius; i &lt;= radius; i++) {\n                    for (int j = -radius; j &lt;= radius; j++) {\n                        int weight = weights[Math.abs(i)];\n                        int neighborX = x + i;\n                        int neighborY = y + j;\n                        if (neighborX &gt;= 0 &amp;&amp; neighborX &lt; pixels[0].length &amp;&amp; neighborY &gt;= 0 &amp;&amp; neighborY &lt; pixels.length) {\n                            sum += pixels[neighborY][neighborX] * weight;\n                        }\n                    }\n                }\n                blurredPixels[y][x] = sum \/ IntStream.of(weights).sum();\n            }\n        }\n\n        return blurredPixels;\n    }\n\n}<\/pre>\n<p><strong>\u6027\u80fd\u6bd4\u8f83<\/strong><\/p>\n<p>\u4e0b\u8868\u6bd4\u8f83\u4e86 OOP \u548c FJP \u9ad8\u65af\u6a21\u7cca\u5b9e\u73b0\u7684\u6027\u80fd\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u7b97\u6cd5<\/th>\n<th>CPU \u65f6\u95f4 (ms)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>OOP<\/td>\n<td>250<\/td>\n<\/tr>\n<tr>\n<td>FJP<\/td>\n<td>120<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p>\u5982\u8868\u6240\u793a\uff0cFJP \u9ad8\u65af\u6a21\u7cca\u7b97\u6cd5\u7684\u6027\u80fd\u663e\u8457\u9ad8\u4e8e OOP \u5b9e\u73b0\uff0c\u8fd9\u8868\u660e\u51fd\u6570\u5f0f\u7f16\u7a0b\u53ef\u4ee5\u6781\u5927\u5730\u63d0\u9ad8\u56fe\u50cf\u5904\u7406\u7b97\u6cd5\u7684\u6548\u7387\u3002<\/p>\n<p>\u4eca\u5929\u5173\u4e8e\u300a\u51fd\u6570\u5f0fJava\u7f16\u7a0b\u5982\u4f55\u52a9\u529b\u56fe\u50cf\u5904\u7406\u7b97\u6cd5\u52a0\u901f\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8ejava,\u56fe\u50cf\u5904\u7406\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u51fd\u6570\u5f0fJava\u7f16\u7a0b\u5982\u4f55\u52a9\u529b\u56fe\u50cf\u5904&#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-202888","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202888","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=202888"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202888\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202888"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202888"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202888"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}