{"id":1315,"date":"2022-10-30T22:43:21","date_gmt":"2022-10-30T14:43:21","guid":{"rendered":"https:\/\/qaqaq.top\/?p=1315"},"modified":"2022-11-27T12:39:46","modified_gmt":"2022-11-27T04:39:46","slug":"io%e6%b5%81-%e7%bc%93%e5%86%b2%e6%b5%81%e5%ad%97%e8%8a%82%e5%9e%8b%e5%ae%9e%e7%8e%b0%e9%9d%9e%e6%96%87%e6%9c%ac%e6%96%87%e4%bb%b6%e7%9a%84%e5%a4%8d%e5%88%b6%e3%80%81%e7%bc%93%e5%86%b2%e6%b5%81","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=1315","title":{"rendered":"IO\u6d41-\u7f13\u51b2\u6d41(\u5b57\u8282\u578b)\u5b9e\u73b0\u975e\u6587\u672c\u6587\u4ef6\u7684\u590d\u5236\u3001\u7f13\u51b2\u6d41\u4e0e\u8282\u70b9\u6d41\u8bfb\u5199\u901f\u5ea6\u5bf9\u6bd4\u3001\u7f13\u51b2\u6d41(\u5b57\u7b26\u578b)\u5b9e\u73b0\u6587\u672c\u6587\u4ef6\u7684\u590d\u5236\u3001IO\u6d41-\u7f13\u51b2\u6d41(\u5b57\u7b26\u578b)\u5b9e\u73b0\u6587\u672c\u6587\u4ef6\u7684\u590d\u5236"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P595;\r\n\r\nimport org.junit.jupiter.api.Test;\r\n\r\nimport java.io.*;\r\n\r\n\/**\r\n * \u5904\u7406\u6d41\u4e4b\u4e00\uff1a\u7f13\u51b2\u6d41\u7684\u4f7f\u7528\r\n *\r\n * 1. \u7f13\u51b2\u6d41\uff1a\r\n * BufferedInputStream\r\n * BufferedOutputStream\r\n * BufferedReader\r\n * BufferedWriter\r\n *\r\n * 2. \u4f5c\u7528\uff1a\u63d0\u4f9b\u6d41\u7684\u8bfb\u53d6\u3001\u5199\u5165\u7684\u901f\u5ea6\r\n *      \u63d0\u9ad8\u8bfb\u5199\u901f\u5ea6\u7684\u539f\u56e0\uff1a\u5185\u90e8\u63d0\u4f9b\u4e86\u4e00\u4e2a\u7f13\u51b2\u533a\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u662f8kb\r\n *\r\n * 3. \u5904\u7406\u6d41\uff0c\u5c31\u662f\"\u5957\u63a5\"\u5728\u5df2\u6709\u7684\u6d41\u7684\u57fa\u7840\u4e0a\u3002\r\n *\r\n * @author RichieZhang\r\n * @create 2022-10-30 \u4e0a\u5348 11:14\r\n *\/\r\npublic class BufferedTest {\r\n\r\n    \/*\r\n    \u5b9e\u73b0\u975e\u6587\u672c\u6587\u4ef6\u7684\u590d\u5236\r\n     *\/\r\n    @Test\r\n    public void BufferedStreamTest() {\r\n        FileInputStream fis = null;\r\n        FileOutputStream fos = null;\r\n        BufferedInputStream bis = null;\r\n        BufferedOutputStream bos = null;\r\n\r\n        try {\r\n            \/\/1. \u9020\u6587\u4ef6\r\n            File srcFile = new File(\"\u7231\u60c5\u4e0e\u53cb\u60c5.jpg\");\r\n            File destFile = new File(\"\u7231\u60c5\u4e0e\u53cb\u60c53.jpg\");\r\n\r\n            \/\/2. \u9020\u6d41\r\n            \/\/2.1 \u9020\u8282\u70b9\u6d41\r\n            fis = new FileInputStream(srcFile);\r\n            fos = new FileOutputStream(destFile);\r\n            \/\/2.2 \u9020\u7f13\u51b2\u6d41\r\n            bis = new BufferedInputStream(fis);\r\n            bos = new BufferedOutputStream(fos);\r\n\r\n            \/\/3. \u590d\u5236\u7684\u7ec6\u8282\uff1a\u8bfb\u53d6\u3001\u5199\u5165\r\n            byte&#91;] buffer = new byte&#91;10];\r\n            int len;\r\n            while ((len = bis.read(buffer)) != -1){\r\n                bos.write(buffer,0,len);\r\n            }\r\n        } catch (IOException e) {\r\n            e.printStackTrace();\r\n        } finally {\r\n            \/\/4. \u8d44\u6e90\u5173\u95ed\r\n            \/\/\u8981\u6c42\uff1a\u5148\u5173\u95ed\u5916\u5c42\u7684\u6d41\uff0c\u518d\u5173\u95ed\u5185\u5c42\u7684\u6d41\r\n            if (bos != null){\r\n                try {\r\n                    bos.close();\r\n                } catch (IOException e) {\r\n                    e.printStackTrace();\r\n                }\r\n            }\r\n            if (bis != null){\r\n                try {\r\n                    bis.close();\r\n                } catch (IOException e) {\r\n                    e.printStackTrace();\r\n                }\r\n            }\r\n            \/\/\u8bf4\u660e\uff1a\u5173\u95ed\u5916\u5c42\u6d41\u7684\u540c\u65f6\uff0c\u5185\u5c42\u6d41\u4e5f\u4f1a\u81ea\u52a8\u7684\u8fdb\u884c\u5173\u95ed\u3002\u5173\u4e8e\u5185\u5c42\u6d41\u7684\u5173\u95ed\uff0c\u6211\u4eec\u53ef\u4ee5\u7701\u7565\u3002\r\n\/\/        fos.close();\r\n\/\/        fis.close();\r\n        }\r\n\r\n    }\r\n\r\n    \/\/\u5b9e\u73b0\u6587\u4ef6\u590d\u5236\u7684\u65b9\u6cd5\r\n    public void copyFileWithBuffered(String srcPath, String destPath){\r\n        FileInputStream fis = null;\r\n        FileOutputStream fos = null;\r\n        BufferedInputStream bis = null;\r\n        BufferedOutputStream bos = null;\r\n\r\n        try {\r\n            \/\/1. \u9020\u6587\u4ef6\r\n            File srcFile = new File(srcPath);\r\n            File destFile = new File(destPath);\r\n\r\n            \/\/2. \u9020\u6d41\r\n            \/\/2.1 \u9020\u8282\u70b9\u6d41\r\n            fis = new FileInputStream(srcFile);\r\n            fos = new FileOutputStream(destFile);\r\n            \/\/2.2 \u9020\u7f13\u51b2\u6d41\r\n            bis = new BufferedInputStream(fis);\r\n            bos = new BufferedOutputStream(fos);\r\n\r\n            \/\/3. \u590d\u5236\u7684\u7ec6\u8282\uff1a\u8bfb\u53d6\u3001\u5199\u5165\r\n            byte&#91;] buffer = new byte&#91;1024];\r\n            int len;\r\n            while ((len = bis.read(buffer)) != -1){\r\n                bos.write(buffer,0,len);\r\n\r\n\/\/                bos.flush();\/\/\u5237\u65b0\u7f13\u51b2\u533a\r\n            }\r\n        } catch (IOException e) {\r\n            e.printStackTrace();\r\n        } finally {\r\n            \/\/4. \u8d44\u6e90\u5173\u95ed\r\n            \/\/\u8981\u6c42\uff1a\u5148\u5173\u95ed\u5916\u5c42\u7684\u6d41\uff0c\u518d\u5173\u95ed\u5185\u5c42\u7684\u6d41\r\n            if (bos != null){\r\n                try {\r\n                    bos.close();\r\n                } catch (IOException e) {\r\n                    e.printStackTrace();\r\n                }\r\n            }\r\n            if (bis != null){\r\n                try {\r\n                    bis.close();\r\n                } catch (IOException e) {\r\n                    e.printStackTrace();\r\n                }\r\n            }\r\n            \/\/\u8bf4\u660e\uff1a\u5173\u95ed\u5916\u5c42\u6d41\u7684\u540c\u65f6\uff0c\u5185\u5c42\u6d41\u4e5f\u4f1a\u81ea\u52a8\u7684\u8fdb\u884c\u5173\u95ed\u3002\u5173\u4e8e\u5185\u5c42\u6d41\u7684\u5173\u95ed\uff0c\u6211\u4eec\u53ef\u4ee5\u7701\u7565\u3002\r\n\/\/        fos.close();\r\n\/\/        fis.close();\r\n        }\r\n    }\r\n\r\n    @Test\r\n    public void testCopyFileWithBuffered(){\r\n\r\n        long start = System.currentTimeMillis();\r\n\r\n        String srcPath = \"C:\\\\Users\\\\ZRich\\\\Documents\\\\\u6211\u7684\u6587\u6863\\\\2023\u6b66\u5fe0\u7965\u300a\u9ad8\u7b49\u6570\u5b66\u57fa\u7840\u7bc7\u300b\u9ad8\u6e05\u7248PDF.pdf\";\r\n        String destPath = \"2023\u6b66\u5fe0\u7965\u300a\u9ad8\u7b49\u6570\u5b66\u57fa\u7840\u7bc7\u300b\u9ad8\u6e05\u7248PDF1.pdf\";\r\n\r\n        copyFileWithBuffered(srcPath,destPath);\r\n\r\n        long end = System.currentTimeMillis();\r\n\r\n        System.out.println(\"\u590d\u5236\u64cd\u4f5c\u82b1\u8d39\u7684\u65f6\u95f4\u4e3a\uff1a\" + (end - start));\/\/154\r\n    }\r\n\r\n    \/*\r\n    \u4f7f\u7528BufferedReader\u548cBufferedWriter\u5b9e\u73b0\u6587\u672c\u6587\u4ef6\u7684\u590d\u5236\r\n     *\/\r\n    @Test\r\n    public void testBufferedReaderBufferedWriter(){\r\n        BufferedReader br = null;\r\n        BufferedWriter bw = null;\r\n\r\n        try {\r\n            \/\/\u521b\u5efa\u6587\u4ef6\u548c\u76f8\u5e94\u7684\u6d41\r\n            br = new BufferedReader(new FileReader(new File(\"dbcp.txt\")));\r\n            bw = new BufferedWriter(new FileWriter(new File(\"dbcp1.txt\")));\r\n\r\n            \/\/\u8bfb\u5199\u64cd\u4f5c\r\n            \/\/\u65b9\u5f0f\u4e00\uff1a\u4f7f\u7528char&#91;]\u6570\u7ec4\r\n\/\/            char&#91;] cbuf = new char&#91;1024];\r\n\/\/            int len;\r\n\/\/            while ((len = br.read(cbuf)) != -1){\r\n\/\/                bw.write(cbuf,0,len);\r\n\/\/    \/\/            bw.flush();\r\n\/\/            }\r\n\r\n            \/\/\u65b9\u5f0f\u4e8c\uff1a\u4f7f\u7528String\r\n            String data;\r\n            while ((data = br.readLine()) != null){\r\n                \/\/\u65b9\u6cd5\u4e00\uff1a\r\n\/\/                bw.write(data + \"\\n\");\/\/data\u4e2d\u4e0d\u5305\u542b\u6362\u884c\u7b26\r\n                \/\/\u65b9\u6cd5\u4e8c\uff1a\r\n                bw.write(data);\/\/data\u4e2d\u4e0d\u5305\u542b\u6362\u884c\u7b26\r\n                bw.newLine();\/\/\u63d0\u4f9b\u6362\u884c\u7684\u64cd\u4f5c\r\n            }\r\n\r\n        } catch (IOException e) {\r\n            e.printStackTrace();\r\n        } finally {\r\n            \/\/\u5173\u95ed\u8d44\u6e90\r\n            if (bw != null){\r\n                try {\r\n                    bw.close();\r\n                } catch (IOException e) {\r\n                    e.printStackTrace();\r\n                }\r\n            }\r\n            if (br != null){\r\n                try {\r\n                    br.close();\r\n                } catch (IOException e) {\r\n                    e.printStackTrace();\r\n                }\r\n\r\n            }\r\n        }\r\n\r\n    }\r\n}\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[46],"class_list":["post-1315","post","type-post","status-publish","format-standard","hentry","category-java-code","tag-java"],"_links":{"self":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1315"}],"collection":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1315"}],"version-history":[{"count":1,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1315\/revisions"}],"predecessor-version":[{"id":1316,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1315\/revisions\/1316"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1315"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1315"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1315"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}