{"id":939,"date":"2018-09-17T18:39:34","date_gmt":"2018-09-17T09:39:34","guid":{"rendered":"https:\/\/chat-messenger.com\/?p=939"},"modified":"2018-12-23T01:53:23","modified_gmt":"2018-12-22T16:53:23","slug":"filechannel-transferto","status":"publish","type":"post","link":"https:\/\/chat-messenger.com\/zh_tw\/\u90e8\u843d\u683c\/java\/\u6587\u4ef6\u901a\u9053\u50b3\u8f38\u81f3","title":{"rendered":"Java\u6a94\u6848\u8907\u88fd\uff08\u7c21\u55ae\u5feb\u901f\uff09"},"content":{"rendered":"<h2 class=\"common_title\"><a name=\"0\">Java\u6a94\u6848\u8907\u88fd\uff08\u7c21\u55ae\u5feb\u901f\uff09<\/a>\u6587\u4ef6\u901a\u9053#\u50b3\u8f38\u81f3<\/h2>\n<p>\n\u722a\u54c7\u8a9e<strong>\u8907\u88fd\u6587\u4ef6<\/strong>\u4ecb\u7d39\u4e00\u500b\u7bc4\u4f8b\u7a0b\u5f0f\u4f86\u57f7\u884c\u6b64\u64cd\u4f5c\u3002<br \/>\n\u7bc4\u4f8b\u7a0b\u5f0f\u57fa\u65bcJ2SE1.4\u4e2d\u5f15\u5165\u7684New I\/O\u3002 <strong>java.nio.channels.FileChannel#transferTo<\/strong> \u65b9\u6cd5\u3002<br \/>\n\u60a8\u53ef\u4ee5\u7de8\u5beb\u8907\u88fd\u8655\u7406\u7a0b\u5e8f\uff0c\u800c\u4e0d\u5fc5\u64d4\u5fc3\u8b80\u53d6\u8cc7\u6599\u6240\u9700\u7684\u7de9\u885d\u5340\uff0c\u9019\u4f7f\u5176\u6210\u70ba\u6700\u7c21\u55ae\u7684\u7de8\u78bc\u65b9\u6cd5\u3002\n<\/p>\n<h2 class=\"common_title\"><a name=\"1\">\u4ec0\u9ebc\u662f\u901a\u8def\uff1f<\/a><\/h2>\n<p>\n\u901a\u9053\u9019\u500b\u5b57\u6709\u591a\u7a2e\u4e0d\u540c\u7684\u4f7f\u7528\u65b9\u5f0f\u3002<br \/>\n\u57fa\u672c\u4e0a\uff0c\u5b83\u4f3c\u4e4e\u8868\u793a\u5176\u4ed6\u8a2d\u5099\u4e4b\u9593\u8f38\u5165\u548c\u8f38\u51fa\u8cc7\u6599\u7684\u50b3\u8f38\u8def\u5f91\u3002<strong>java.nio.channels.FileChannel<\/strong> \u662f\u4e00\u500b\u8868\u793a\u8b80\u53d6\u548c\u5beb\u5165\u6a94\u6848\u7684\u9023\u63a5\u7684\u985e\u5225\u3002<br \/>\n<br \/><strong>\u50b3\u9001\u5230<\/strong> \u65b9\u6cd5\u53ef\u4ee5\u5c07\u4f4d\u5143\u7d44\u5f9e\u4f86\u6e90\u6a94\u6848\u50b3\u8f38\u5230\u76ee\u6a19\u901a\u9053\u3002<\/p>\n<p>\u4ee5\u4e0b\u5f15\u7528\u81eaJavaAPI\u6587\u4ef6\u3002\n<\/p>\n<blockquote><p>\n<strong>TransferTo\uff08\u9577\u4f4d\u7f6e\uff0c\u9577\u8a08\u6578\uff0cWritableByteChannel \u76ee\u6a19\uff09<\/strong><br \/>\n\u5c07\u6b64\u901a\u9053\u7684\u6a94\u6848\u4e2d\u7684\u4f4d\u5143\u7d44\u50b3\u8f38\u5230\u6307\u5b9a\u7684\u53ef\u5beb\u5165\u4f4d\u5143\u7d44\u901a\u9053\u3002<br \/>\n\u6b64\u65b9\u6cd5\u6bd4\u5f9e\u8a72\u901a\u9053\u8b80\u53d6\u8cc7\u6599\u4e26\u5c07\u5176\u5beb\u5165\u76ee\u6a19\u901a\u9053\u7684\u7c21\u55ae\u5faa\u74b0\u8981\u9ad8\u6548\u5f97\u591a\u3002\u8a31\u591a\u4f5c\u696d\u7cfb\u7d71\u53ef\u4ee5\u5c07\u4f4d\u5143\u7d44\u76f4\u63a5\u5f9e\u6a94\u6848\u7cfb\u7d71\u5feb\u53d6\u50b3\u8f38\u5230\u76ee\u6a19\u901a\u9053\u3002\u6b64\u6642\uff0c\u6c92\u6709\u4f4d\u5143\u7d44\u88ab\u8907\u88fd\u3002\n<\/p><\/blockquote>\n<p>\n\u9019\u500b\u9a57\u8b49\u7d50\u679c\u986f\u793a\u5982\u4f55\u4f7f\u7528\u666e\u901a\u6d41\uff0c<br \/>\n\u8907\u88fd\u904e\u7a0b\u6bd4\u5176\u4ed6 FileChannel \u65b9\u6cd5\uff08\u4f8b\u5982\u4f7f\u7528 ByteBuffer#allocateDirect \u65b9\u6cd5\uff09\u66f4\u5feb\u3002<\/p>\n<p><script type=\"text\/javascript\" src=\"https:\/\/chat-messenger.com\/js\/common.js?dd12sssas2223\" charset=\"UTF-8\"><\/script><br \/>\n<script type=\"text\/javascript\"> writePR(); <\/script><\/p>\n<h2 class=\"common_title\"><a name=\"2\">\u7bc4\u4f8b\u7a0b\u5f0f<\/a><\/h2>\n<p><textarea readonly=\"readonly\" style=\"font-size: 13px;height: 400px;\" class=\"src\" onclick=\"this.focus();this.select()\">\/**<br \/>\n * \u30b3\u30d4\u30fc\u5143\u306e\u30d1\u30b9[srcPath]\u304b\u3089\u3001\u30b3\u30d4\u30fc\u5148\u306e\u30d1\u30b9[destPath]\u3078<br \/>\n * \u30d5\u30a1\u30a4\u30eb\u306e\u30b3\u30d4\u30fc\u3092\u884c\u3044\u307e\u3059\u3002<br \/>\n * \u30b3\u30d4\u30fc\u51e6\u7406\u306b\u306fFileChannel#transferTo\u30e1\u30bd\u30c3\u30c9\u3092\u5229\u7528\u3057\u307e\u3059\u3002<br \/>\n * \u5c1a\u3001\u30b3\u30d4\u30fc\u51e6\u7406\u7d42\u4e86\u5f8c\u3001\u5165\u529b\u30fb\u51fa\u529b\u306e\u30c1\u30e3\u30cd\u30eb\u3092\u30af\u30ed\u30fc\u30ba\u3057\u307e\u3059\u3002<br \/>\n * @param srcPath    \u30b3\u30d4\u30fc\u5143\u306e\u30d1\u30b9<br \/>\n * @param destPath    \u30b3\u30d4\u30fc\u5148\u306e\u30d1\u30b9<br \/>\n * @throws IOException    \u4f55\u3089\u304b\u306e\u5165\u51fa\u529b\u51e6\u7406\u4f8b\u5916\u304c\u767a\u751f\u3057\u305f\u5834\u5408<br \/>\n *\/<br \/>\npublic static void copyTransfer(String srcPath, String destPath)<br \/>\n    throws IOException {<\/p>\n<p>    \u6a94\u6848\u901a\u9053 srcChannel = \u65b0<br \/>\n        FileInputStream(srcPath).getChannel();<br \/>\n    \u6a94\u6848\u901a\u9053 destChannel = \u65b0<br \/>\n        FileOutputStream(destPath).getChannel();<br \/>\n    \u5617\u8a66 {<br \/>\n        srcChannel.transferTo(0, srcChannel.size(), destChannel);<br \/>\n    } \u6700\u5f8c {<br \/>\n        srcChannel.close();<br \/>\n        destChannel.close();<br \/>\n    }<\/p>\n<p>}<br \/>\n<\/textarea><\/p>\n<h2 class=\"common_title\"><a name=\"3\">\u57f7\u884c<\/a><\/h2>\n<p>\n\u70ba\u4e86\u8907\u88fd\u7bc4\u4f8b\u7a0b\u5f0f\u6587\u4ef6\uff0c\u6211\u5011\u5728C\u76e4\u4e0b\u76f4\u63a5\u6e96\u5099\u4e86\u4e00\u500b100MB\u7684\u6587\u4ef6\u300c100M.txt\u300d\u3002<br \/>\n\u5728\u7bc4\u4f8b\u7a0b\u5f0f\u4e2d <i>C:\\100M.txt<\/i> \u900f\u904e\u8907\u88fd <i>C:\\a.txt<\/i> \u5efa\u7acb\u4e00\u500b\u6587\u4ef6\u3002<\/p>\n<p>\u6b64\u7bc4\u4f8b\u662f\u5728\u4ee5\u4e0b\u74b0\u5883\u4e2d\u57f7\u884c\u7684\u3002<br \/>\n\u4f5c\u696d\u7cfb\u7d71\uff1aWindows XP<br \/>\nCPU\uff1a\u901f\u9f8d1.46GHz<br \/>\n\u8a18\u61b6\u9ad4\uff1a1GB<br \/>\nJRE\uff1a1.6.4\n<\/p>\n<p>\u25c6\u57f7\u884c\u7bc4\u4f8b<\/p>\n<pre class=\"sample_src\">\/** * \u57f7\u884c\u7bc4\u4f8b * @param args *\/ public static void main(String[] args) { try { copyTransfer(&quot;C:\\\\100M.txt&quot;, &quot;C:\\\\a.txt&quot;); } catchtxt&quot;); } catch (IOException e) { e.printStackTrace(); } }\r\n<\/pre>\n<p>\u25c6\u57f7\u884c\u7d50\u679c<br \/>\n<a href=\"https:\/\/chat-messenger.com\/images\/file_copy.jpg\" target=\"_blank\"><br \/>\n<img src=\"https:\/\/chat-messenger.com\/images\/file_copy.jpg\" alt=\"\" border=\"0\"><\/a><br clear=\"all\"><\/p>\n<p>\n\u3000<strong>\u6587\u4ef6\u901a\u9053#\u50b3\u8f38\u81f3<\/strong> \u5728\u5f71\u5370\u8655\u7406\u4e2d\u4f7f\u7528\u8a72\u65b9\u6cd5<br \/>\n\u8907\u88fd\u4e00\u500b 100MB \u7684\u6a94\u6848\u5927\u7d04\u9700\u8981 3 \u79d2\u9418\u3002\u6b64\u5916\uff0c\u8907\u88fd\u904e\u7a0b\u4e2d\u7684\u5806\u4f7f\u7528\u91cf\u7d04\u70ba 300 (KB)\u3002<\/p>\n<p>\u987a\u4fbf\u63d0\u4e00\u53e5<a href=\"https:\/\/chat-messenger.com\/zh_tw\/\u90e8\u843d\u683c\/java\/\u6587\u4ef6\u526f\u672c\/\">Java\u6a94\u6848\u8907\u88fd\uff08\u66f4\u6539\u7de9\u885d\u5340\u5927\u5c0f\uff09<\/a>\u5728\u4ecb\u7d39\u7684\u65b9\u6cd5\u4e2d<br \/>\n\u7576\u6211\u5011\u6307\u5b9a\u6700\u6709\u6548\u7684\u7de9\u885d\u5340\u5927\u5c0f 1000KB \u6642\uff0c\u8655\u7406\u6642\u9593\u7d04\u70ba 4 \u79d2\uff0c\u5806\u4f7f\u7528\u91cf\u7d04\u70ba 1,300KB\u3002\n<\/p>\n<p>\n\u5373\u4f7f\u900f\u904e\u6d41\u8907\u88fd\u6a94\u6848\u4e5f\u53ef\u4ee5\u900f\u904e\u8abf\u6574\u7de9\u885d\u5340\u5927\u5c0f\u4f86\u52a0\u901f\uff0c\u6240\u4ee5<br \/>\n\u53ef\u4ee5\u8aaa\uff0c\u8907\u88fd\u55ae\u4e00\u6587\u4ef6\u7684\u904e\u7a0b\u4e26\u6c92\u6709\u592a\u5927\u7684\u5340\u5225\u3002<br \/>\n\u7136\u800c\uff0c\u7576\u9023\u7e8c\u8907\u88fd\u5927\u6a94\u6848\u6216\u4e26\u884c\u57f7\u884c\u591a\u500b\u8907\u88fd\u904e\u7a0b\u6642\uff0cFileChannel \u5728\u8655\u7406\u901f\u5ea6\u548c\u5806\u758a\u4f7f\u7528\u65b9\u9762\u53ef\u4ee5\u6709\u6548\u3002<\/p>","protected":false},"excerpt":{"rendered":"<p>Java \u6a94\u6848\u8907\u88fd\uff08\u7c21\u55ae\/\u5feb\u901f\uff09FileChannel#transferTo \u4f7f\u7528 Java \u8907\u88fd\u6a94\u6848 [...]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":""},"categories":[19],"tags":[],"_links":{"self":[{"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/posts\/939"}],"collection":[{"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/comments?post=939"}],"version-history":[{"count":8,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/posts\/939\/revisions"}],"predecessor-version":[{"id":1883,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/posts\/939\/revisions\/1883"}],"wp:attachment":[{"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/media?parent=939"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/categories?post=939"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/tags?post=939"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}