{"id":896,"date":"2023-01-29T08:22:15","date_gmt":"2023-08-04T18:46:06","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/%e4%bd%bf%e7%94%a8java%e5%a4%8d%e5%88%b6%e6%96%87%e4%bb%b6-%e5%9c%a8java%e4%b8%ad%e6%9c%89%e5%9b%9b%e7%a7%8d%e5%a4%8d%e5%88%b6%e6%96%87%e4%bb%b6%e7%9a%84%e6%96%b9%e5%bc%8f\/"},"modified":"2025-08-03T16:11:27","modified_gmt":"2025-08-03T08:11:27","slug":"%e4%bd%bf%e7%94%a8java%e5%a4%8d%e5%88%b6%e6%96%87%e4%bb%b6-%e5%9c%a8java%e4%b8%ad%e6%9c%89%e5%9b%9b%e7%a7%8d%e5%a4%8d%e5%88%b6%e6%96%87%e4%bb%b6%e7%9a%84%e6%96%b9%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8java%e5%a4%8d%e5%88%b6%e6%96%87%e4%bb%b6-%e5%9c%a8java%e4%b8%ad%e6%9c%89%e5%9b%9b%e7%a7%8d%e5%a4%8d%e5%88%b6%e6%96%87%e4%bb%b6%e7%9a%84%e6%96%b9%e5%bc%8f\/","title":{"rendered":"\u4f7f\u7528Java\u590d\u5236\u6587\u4ef6-\u5728Java\u4e2d\u6709\u56db\u79cd\u590d\u5236\u6587\u4ef6\u7684\u65b9\u5f0f"},"content":{"rendered":"

Java\u590d\u5236\u6587\u4ef6\u662f\u975e\u5e38\u5e38\u89c1\u7684\u64cd\u4f5c\u3002\u4f46\u662fjava.io.File\u7c7b\u6ca1\u6709\u4efb\u4f55\u5feb\u6377\u65b9\u6cd5\u6765\u4ece\u6e90\u5230\u76ee\u6807\u590d\u5236\u6587\u4ef6\u3002\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5c06\u5b66\u4e60\u56db\u79cd\u4e0d\u540c\u7684\u65b9\u6cd5\u6765\u5728Java\u4e2d\u590d\u5236\u6587\u4ef6\u3002<\/p>\n

\u590d\u5236\u6587\u4ef6\u7684Java\u64cd\u4f5c<\/h2>\n
    \u4f7f\u7528Java\u590d\u5236\u6587\u4ef6-\u6d41<\/ol>\n

    \u8fd9\u662f\u5728Java\u4e2d\u5e38\u89c1\u7684\u6587\u4ef6\u590d\u5236\u65b9\u5f0f\u3002\u8fd9\u91cc\u6211\u4eec\u521b\u5efa\u4e86\u4e24\u4e2a\u6587\u4ef6 – \u6e90\u6587\u4ef6\u548c\u76ee\u6807\u6587\u4ef6\u3002\u7136\u540e\u6211\u4eec\u4ece\u6e90\u6587\u4ef6\u521b\u5efa\u4e86InputStream\uff0c\u5e76\u4f7f\u7528OutputStream\u5c06\u5176\u5199\u5165\u76ee\u6807\u6587\u4ef6\uff0c\u4ee5\u8fdb\u884cJava\u590d\u5236\u6587\u4ef6\u64cd\u4f5c\u3002\u8fd9\u662f\u4f7f\u7528\u6d41\u8fdb\u884cJava\u590d\u5236\u6587\u4ef6\u7684\u65b9\u6cd5\u3002<\/p>\n

    private static void copyFileUsingStream(File source, File dest) throws IOException {\r\n    InputStream is = null;\r\n    OutputStream os = null;\r\n    try {\r\n        is = new FileInputStream(source);\r\n        os = new FileOutputStream(dest);\r\n        byte[] buffer = new byte[1024];\r\n        int length;\r\n        while ((length = is.read(buffer)) > 0) {\r\n            os.write(buffer, 0, length);\r\n        }\r\n    } finally {\r\n        is.close();\r\n        os.close();\r\n    }\r\n}\r\n<\/code><\/pre>\n
      Java \u590d\u5236\u6587\u4ef6 – java.nio.channels.FileChannel<\/ol>\n
      Java NIO \u7c7b\u662f\u5728 Java 1.4 \u4e2d\u5f15\u5165\u7684\uff0cFileChannel \u53ef\u4ee5\u7528\u4e8e\u5728 Java \u4e2d\u590d\u5236\u6587\u4ef6\u3002\u6839\u636e transferFrom() \u65b9\u6cd5\u7684 javadoc\uff0c\u8fd9\u79cd\u6587\u4ef6\u590d\u5236\u65b9\u5f0f\u5e94\u8be5\u6bd4\u4f7f\u7528\u6d41\u8fdb\u884c\u6587\u4ef6\u590d\u5236\u66f4\u5feb\u3002\u4e0b\u9762\u662f\u53ef\u4ee5\u4f7f\u7528 FileChannel \u8fdb\u884c\u6587\u4ef6\u590d\u5236\u7684\u65b9\u6cd5\u3002<\/p>\n
      private static void copyFileUsingChannel(File source, File dest) throws IOException {\r\n    FileChannel sourceChannel = null;\r\n    FileChannel destChannel = null;\r\n    try {\r\n        sourceChannel = new FileInputStream(source).getChannel();\r\n        destChannel = new FileOutputStream(dest).getChannel();\r\n        destChannel.transferFrom(sourceChannel, 0, sourceChannel.size());\r\n       }finally{\r\n           sourceChannel.close();\r\n           destChannel.close();\r\n   }\r\n}\r\n<\/code><\/pre>\n
        Java\u590d\u5236\u6587\u4ef6 – Apache Commons IO FileUtils<\/ol>\n
        \u5982\u679c\u4f60\u5728\u9879\u76ee\u4e2d\u5df2\u7ecf\u4f7f\u7528\u4e86Apache Commons IO\uff0c\u90a3\u4e48\u53ef\u4ee5\u4f7f\u7528FileUtils.copyFile\uff08File srcFile\uff0cFile destFile\uff09\u5728Java\u4e2d\u590d\u5236\u6587\u4ef6\u3002\u8fd9\u6837\u505a\u53ef\u4ee5\u4f7f\u4ee3\u7801\u66f4\u7b80\u6d01\u3002\u5185\u90e8\u5b83\u4f7f\u7528Java NIO FileChannel\uff0c\u6240\u4ee5\u5982\u679c\u4f60\u4e0d\u6253\u7b97\u5728\u5176\u4ed6\u51fd\u6570\u4e2d\u4f7f\u7528\u8be5\u65b9\u6cd5\uff0c\u5219\u53ef\u4ee5\u907f\u514d\u4f7f\u7528\u8fd9\u4e2a\u5305\u88c5\u65b9\u6cd5\u3002\u4e0b\u9762\u662f\u4f7f\u7528Apache Commons IO\u8fdb\u884cJava\u6587\u4ef6\u590d\u5236\u64cd\u4f5c\u7684\u65b9\u6cd5\u3002<\/p>\n
        private static void copyFileUsingApacheCommonsIO(File source, File dest) throws IOException {\r\n    FileUtils.copyFile(source, dest);\r\n}\r\n<\/code><\/pre>\n
          Java\u590d\u5236\u6587\u4ef6-\u6587\u4ef6\u7c7b<\/ol>\n
          \u5982\u679c\u60a8\u6b63\u5728\u4f7f\u7528Java 7\u6216\u66f4\u9ad8\u7248\u672c\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528Files\u7c7b\u7684copy()\u65b9\u6cd5\u6765\u5728Java\u4e2d\u590d\u5236\u6587\u4ef6\u3002\u5b83\u4f7f\u7528\u6587\u4ef6\u7cfb\u7edf\u63d0\u4f9b\u7a0b\u5e8f\u6765\u6267\u884c\u6587\u4ef6\u7684\u590d\u5236\u3002<\/p>\n
          private static void copyFileUsingJava7Files(File source, File dest) throws IOException {\r\n    Files.copy(source.toPath(), dest.toPath());\r\n}\r\n<\/code><\/pre>\n
          \u4e3a\u4e86\u627e\u51fa\u54ea\u79cd\u65b9\u6cd5\u6700\u5feb\uff0c\u6211\u7f16\u5199\u4e86\u4e00\u4e2a\u6d4b\u8bd5\u7c7b\uff0c\u5e76\u9010\u4e2a\u6267\u884c\u4e0a\u8ff0\u65b9\u6cd5\u6765\u590d\u52361 GB\u7684\u6587\u4ef6\u3002\u5728\u6bcf\u6b21\u8c03\u7528\u4e2d\uff0c\u6211\u4f7f\u7528\u4e0d\u540c\u7684\u6587\u4ef6\uff0c\u4ee5\u907f\u514d\u7f13\u5b58\u5bf9\u540e\u7eed\u65b9\u6cd5\u7684\u4efb\u4f55\u6709\u5229\u5f71\u54cd\u3002<\/p>\n
          package com.Olivia.files;\r\n\r\nimport java.io.File;\r\nimport java.io.FileInputStream;\r\nimport java.io.FileOutputStream;\r\nimport java.io.IOException;\r\nimport java.io.InputStream;\r\nimport java.io.OutputStream;\r\nimport java.nio.channels.FileChannel;\r\nimport java.nio.file.Files;\r\n\r\nimport org.apache.commons.io.FileUtils;\r\n\r\npublic class JavaCopyFile {\r\n\r\n    public static void main(String[] args) throws InterruptedException, IOException {\r\n        File source = new File(\"\/Users\/scdev\/tmp\/source.avi\");\r\n        File dest = new File(\"\/Users\/scdev\/tmp\/dest.avi\");\r\n\r\n        \/\/copy file conventional way using Stream\r\n        long start = System.nanoTime();\r\n        copyFileUsingStream(source, dest);\r\n        System.out.println(\"Time taken by Stream Copy = \"+(System.nanoTime()-start));\r\n        \r\n        \/\/copy files using java.nio FileChannel\r\n        source = new File(\"\/Users\/scdev\/tmp\/sourceChannel.avi\");\r\n        dest = new File(\"\/Users\/scdev\/tmp\/destChannel.avi\");\r\n        start = System.nanoTime();\r\n        copyFileUsingChannel(source, dest);\r\n        System.out.println(\"Time taken by Channel Copy = \"+(System.nanoTime()-start));\r\n        \r\n        \/\/copy files using apache commons io\r\n        source = new File(\"\/Users\/scdev\/tmp\/sourceApache.avi\");\r\n        dest = new File(\"\/Users\/scdev\/tmp\/destApache.avi\");\r\n        start = System.nanoTime();\r\n        copyFileUsingApacheCommonsIO(source, dest);\r\n        System.out.println(\"Time taken by Apache Commons IO Copy = \"+(System.nanoTime()-start));\r\n        \r\n        \/\/using Java 7 Files class\r\n        source = new File(\"\/Users\/scdev\/tmp\/sourceJava7.avi\");\r\n        dest = new File(\"\/Users\/scdev\/tmp\/destJava7.avi\");\r\n        start = System.nanoTime();\r\n        copyFileUsingJava7Files(source, dest);\r\n        System.out.println(\"Time taken by Java7 Files Copy = \"+(System.nanoTime()-start));        \r\n    }\r\n}\r\n<\/code><\/pre>\n
          \u8fd9\u662f\u4e0a\u8ff0\u7a0b\u5e8f\u7684\u8f93\u51fa\u7ed3\u679c\uff0c\u8bf7\u6ce8\u610f\u6211\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\u6dfb\u52a0\u4e86\u6ce8\u91ca\uff0c\u4ee5\u786e\u4fdd\u6bcf\u6b21\u53ea\u4f7f\u7528\u4e00\u79cd\u65b9\u6cd5\u8fdb\u884cJava\u6587\u4ef6\u590d\u5236\u64cd\u4f5c\u3002<\/p>\n
          Time taken by Stream Copy = 44582575000\r\nTime taken by Channel Copy = 104138195000\r\nTime taken by Apache Commons IO Copy = 108396714000\r\nTime taken by Java7 Files Copy = 89061578000\r\n<\/code><\/pre>\n
          \u4ece\u8f93\u51fa\u7ed3\u679c\u53ef\u4ee5\u6e05\u695a\u5730\u770b\u51fa\uff0c\u5728Java\u4e2d\uff0c\u6d41\u590d\u5236\u662f\u590d\u5236\u6587\u4ef6\u7684\u6700\u4f73\u65b9\u5f0f\u3002\u4f46\u8fd9\u53ea\u662f\u4e00\u4e2a\u975e\u5e38\u57fa\u7840\u7684\u6d4b\u8bd5\u3002\u5982\u679c\u4f60\u6b63\u5728\u8fdb\u884c\u6027\u80fd\u5bc6\u96c6\u578b\u9879\u76ee\u7684\u5f00\u53d1\uff0c\u90a3\u4e48\u4f60\u5e94\u8be5\u5c1d\u8bd5\u4e0d\u540c\u7684java\u6587\u4ef6\u590d\u5236\u65b9\u6cd5\uff0c\u5e76\u8bb0\u5f55\u4e0b\u65f6\u95f4\u6765\u627e\u51fa\u6700\u4f73\u7684\u65b9\u6cd5\u3002\u4f60\u8fd8\u5e94\u8be5\u6839\u636e\u6587\u4ef6\u7684\u5e73\u5747\u5927\u5c0f\u5c1d\u8bd5\u4e0d\u540c\u7684java\u6587\u4ef6\u590d\u5236\u65b9\u5f0f\u3002\u6211\u5728YouTube\u4e0a\u521b\u5efa\u4e86\u4e00\u4e2a\u5173\u4e8e4\u79cd\u590d\u5236\u6587\u4ef6\u7684java\u65b9\u5f0f\u7684\u89c6\u9891\uff0c\u4f60\u53ef\u4ee5\u89c2\u770b\u4ee5\u83b7\u53d6\u66f4\u591a\u4fe1\u606f\u3002https:\/\/www.youtube.com\/watch?v=op6tgG95zek<\/p>\n","protected":false},"excerpt":{"rendered":"
          Java\u590d\u5236\u6587\u4ef6\u662f\u975e\u5e38\u5e38\u89c1\u7684\u64cd\u4f5c\u3002\u4f46\u662fjava.io.File\u7c7b\u6ca1\u6709\u4efb\u4f55\u5feb\u6377\u65b9\u6cd5\u6765\u4ece\u6e90\u5230\u76ee\u6807\u590d\u5236\u6587\u4ef6\u3002\u5728\u8fd9\u91cc\uff0c […]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-896","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"\n\u4f7f\u7528Java\u590d\u5236\u6587\u4ef6-\u5728Java\u4e2d\u6709\u56db\u79cd\u590d\u5236\u6587\u4ef6\u7684\u65b9\u5f0f - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u4f7f\u7528Java\u590d\u5236\u6587\u4ef6-\u5728Java\u4e2d\u6709\u56db\u79cd\u590d\u5236\u6587\u4ef6\u7684\u65b9\u5f0f\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u4f7f\u7528java\u590d\u5236\u6587\u4ef6-\u5728java\u4e2d\u6709\u56db\u79cd\u590d\u5236\u6587\u4ef6\u7684\u65b9\u5f0f\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u4f7f\u7528Java\u590d\u5236\u6587\u4ef6-\u5728Java\u4e2d\u6709\u56db\u79cd\u590d\u5236\u6587\u4ef6\u7684\u65b9\u5f0f\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u4f7f\u7528Java\u590d\u5236\u6587\u4ef6-\u5728Java\u4e2d\u6709\u56db\u79cd\u590d\u5236\u6587\u4ef6\u7684\u65b9\u5f0f\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u4f7f\u7528java\u590d\u5236\u6587\u4ef6-\u5728java\u4e2d\u6709\u56db\u79cd\u590d\u5236\u6587\u4ef6\u7684\u65b9\u5f0f\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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