{"id":1516,"date":"2026-05-30T21:40:31","date_gmt":"2026-05-30T13:40:31","guid":{"rendered":"https:\/\/yunyanglib.cn\/?p=1516"},"modified":"2026-05-30T21:40:32","modified_gmt":"2026-05-30T13:40:32","slug":"%e3%80%90java%e3%80%91%e7%bc%93%e5%86%b2%e6%b5%81%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/yunyanglib.cn\/?p=1516","title":{"rendered":"\u3010Java\u3011\u7f13\u51b2\u6d41\u8be6\u89e3"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5927\u5bb6\u597d\uff0c\u6700\u8fd1\u4e00\u76f4\u5728\u68b3\u7406 Java IO \u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u7ee7\u5b57\u8282\u6d41\u3001\u5b57\u7b26\u6d41\u4e4b\u540e\uff0c\u4eca\u5929\u6765\u548c\u5927\u5bb6\u6df1\u5165\u804a\u4e00\u804a<strong>\u7f13\u51b2\u6d41<\/strong>\u3002\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u5355\u7eaf\u4f7f\u7528\u57fa\u7840\u5b57\u8282\u6d41\u3001\u5b57\u7b26\u6d41\u8bfb\u5199\u6587\u4ef6\u6548\u7387\u504f\u4f4e\uff0c\u800c\u7f13\u51b2\u6d41\u53ef\u4ee5\u5927\u5e45\u4f18\u5316 IO \u6027\u80fd\uff0c\u4e5f\u662f\u65e5\u5e38\u9879\u76ee\u91cc\u4f7f\u7528\u9891\u7387\u6781\u9ad8\u7684 IO \u6d41\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u7f13\u51b2\u6d41\u6838\u5fc3\u5de5\u4f5c\u539f\u7406<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u666e\u901a\u6587\u4ef6\u6d41\u6bcf\u8bfb\u5199\u4e00\u6b21\u6570\u636e\uff0c\u90fd\u4f1a\u76f4\u63a5\u548c\u78c1\u76d8\u8fdb\u884c\u4ea4\u4e92\uff0c\u9891\u7e41\u7684\u78c1\u76d8 IO\u3001\u7cfb\u7edf\u8c03\u7528\u4f1a\u6781\u5927\u62d6\u6162\u7a0b\u5e8f\u901f\u5ea6\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7f13\u51b2\u6d41\u7684\u8bbe\u8ba1\u601d\u8def\u5f88\u7b80\u5355\uff1a<strong>\u5728\u5185\u5b58\u4e2d\u5f00\u8f9f\u4e00\u5757\u7f13\u51b2\u533a<\/strong>\u3002\u6570\u636e\u4e0d\u4f1a\u76f4\u63a5\u548c\u78c1\u76d8\u4ea4\u4e92\uff0c\u800c\u662f\u5148\u5b58\u5165\u7f13\u51b2\u533a\uff0c\u7b49\u7f13\u51b2\u533a\u88ab\u586b\u6ee1\u540e\uff0c\u518d\u4e00\u6b21\u6027\u6279\u91cf\u8bfb\u5199\u78c1\u76d8\u6570\u636e\u3002\u8fd9\u6837\u5927\u5e45\u51cf\u5c11\u4e86\u78c1\u76d8\u8bbf\u95ee\u6b21\u6570\u4e0e\u7cfb\u7edf\u8c03\u7528\u6b21\u6570\uff0c\u8fd9\u4e5f\u662f\u7f13\u51b2\u6d41\u9ad8\u6548\u7684\u6839\u672c\u539f\u56e0\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001\u5b57\u8282\u7f13\u51b2\u6d41<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b57\u8282\u7f13\u51b2\u6d41\u5206\u4e3a<code>BufferedInputStream<\/code>\uff08\u5b57\u8282\u7f13\u51b2\u8f93\u5165\u6d41\uff09\u548c<code>BufferedOutputStream<\/code>\uff08\u5b57\u8282\u7f13\u51b2\u8f93\u51fa\u6d41\uff09\uff0c\u5b83\u662f\u5bf9\u57fa\u7840\u5b57\u8282\u6d41<code>InputStream<\/code>\u3001<code>OutputStream<\/code>\u7684\u5305\u88c5\u589e\u5f3a\uff0c\u4e13\u95e8\u7528\u6765\u5904\u7406\u5b57\u8282\u6570\u636e\uff08\u56fe\u7247\u3001\u89c6\u9891\u3001\u538b\u7f29\u5305\u7b49\u4efb\u610f\u7c7b\u578b\u6587\u4ef6\uff09\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u5e38\u7528\u6784\u9020\u65b9\u6cd5<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>BufferedInputStream(InputStream in)<\/code>\uff1a\u63a5\u6536\u4e00\u4e2a\u57fa\u7840\u5b57\u8282\u8f93\u5165\u6d41\uff0c\u521b\u5efa\u7f13\u51b2\u8f93\u5165\u6d41<\/li>\n\n\n\n<li><code>BufferedOutputStream(OutputStream out)<\/code>\uff1a\u63a5\u6536\u4e00\u4e2a\u57fa\u7840\u5b57\u8282\u8f93\u51fa\u6d41\uff0c\u521b\u5efa\u7f13\u51b2\u8f93\u51fa\u6d41<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u4ee3\u7801\u793a\u4f8b\uff1a\u4f7f\u7528\u5b57\u8282\u7f13\u51b2\u6d41\u590d\u5236\u6587\u4ef6<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u6f14\u793a\u7528\u5b57\u8282\u7f13\u51b2\u6d41\u5b9e\u73b0\u6587\u4ef6\u590d\u5236\uff0c\u5bf9\u6bd4\u539f\u751f\u5b57\u8282\u6d41\uff0c\u6548\u7387\u63d0\u5347\u975e\u5e38\u660e\u663e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.io.BufferedInputStream;\nimport java.io.BufferedOutputStream;\nimport java.io.FileInputStream;\nimport java.io.FileOutputStream;\nimport java.io.IOException;\n\n\/**\n * \u5b57\u8282\u7f13\u51b2\u6d41\u5b9e\u73b0\u6587\u4ef6\u590d\u5236\n * @author YunYang\n *\/\npublic class BufferedByteStreamDemo {\n    public static void main(String&#91;] args) {\n        \/\/ \u6e90\u6587\u4ef6\u8def\u5f84\u3001\u76ee\u6807\u6587\u4ef6\u8def\u5f84\n        String srcPath = \"D:\/test.jpg\";\n        String destPath = \"D:\/copy_test.jpg\";\n\n        try (\n            \/\/ \u5305\u88c5\u57fa\u7840\u6587\u4ef6\u6d41\uff0c\u521b\u5efa\u5b57\u8282\u7f13\u51b2\u6d41\n            BufferedInputStream bis = new BufferedInputStream(new FileInputStream(srcPath));\n            BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(destPath))\n        ) {\n            \/\/ \u5b9a\u4e49\u5b57\u8282\u6570\u7ec4\uff0c\u6279\u91cf\u8bfb\u53d6\u6570\u636e\n            byte&#91;] buf = new byte&#91;1024];\n            int len;\n            \/\/ \u5faa\u73af\u8bfb\u53d6\uff0clen\u4ee3\u8868\u672c\u6b21\u8bfb\u53d6\u5230\u7684\u5b57\u8282\u4e2a\u6570\n            while ((len = bis.read(buf)) != -1) {\n                bos.write(buf, 0, len);\n            }\n            \/\/ \u5237\u65b0\u7f13\u51b2\u533a\uff0c\u5f3a\u5236\u5c06\u7f13\u51b2\u6570\u636e\u5199\u5165\u6587\u4ef6\n            bos.flush();\n            System.out.println(\"\u6587\u4ef6\u590d\u5236\u5b8c\u6210\uff01\");\n        } catch (IOException e) {\n            e.printStackTrace();\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u8865\u5145\u77e5\u8bc6\u70b9\uff1abyte &amp; 0xFF<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u5b57\u8282\u6d41\u64cd\u4f5c\u4e2d\uff0c\u7ecf\u5e38\u4f1a\u770b\u5230 <code>byte &amp; 0xFF<\/code> \u8fd9\u6bb5\u4ee3\u7801\uff0c\u8fd9\u91cc\u7b80\u5355\u89e3\u91ca\u4e00\u4e0b\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Java \u4e2d<code>byte<\/code>\u662f<strong>\u6709\u7b26\u53f7\u7c7b\u578b<\/strong>\uff0c\u53d6\u503c\u8303\u56f4 <code>-128 ~ 127<\/code>\u3002\u800c\u5e95\u5c42 IO \u8bfb\u53d6\u6570\u636e\u65f6\uff0c\u6211\u4eec\u5e0c\u671b\u5f97\u5230 <code>0 ~ 255<\/code> \u7684\u65e0\u7b26\u53f7\u6570\u503c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7 <code>byte &amp; 0xFF<\/code> \u53ef\u4ee5\u5c06\u6709\u7b26\u53f7 byte \u8f6c\u4e3a\u5bf9\u5e94\u7684\u65e0\u7b26\u53f7 int \u503c\uff0c\u907f\u514d\u6570\u636e\u89e3\u6790\u51fa\u9519\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u987a\u5e26\u63d0\u4e00\u4e0b\u8ba1\u7b97\u673a\u5e95\u5c42\u7684\u7f16\u7801\u89c4\u5219\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u539f\u7801<\/strong>\uff1a\u9996\u4f4d\u4e3a\u7b26\u53f7\u4f4d\uff0c\u5176\u4f59\u4f4d\u4e3a\u6570\u503c\u672c\u8eab\uff1b<\/li>\n\n\n\n<li><strong>\u53cd\u7801<\/strong>\uff1a\u6b63\u6570\u53cd\u7801\u7b49\u4e8e\u539f\u7801\uff0c\u8d1f\u6570\u7b26\u53f7\u4f4d\u4e0d\u53d8\uff0c\u5176\u4f59\u4f4d\u53d6\u53cd\uff1b<\/li>\n\n\n\n<li><strong>\u8865\u7801<\/strong>\uff1a\u6b63\u6570\u8865\u7801\u7b49\u4e8e\u539f\u7801\uff0c\u8d1f\u6570\u5728\u53cd\u7801\u57fa\u7840\u4e0a\u52a0 1\u3002\u8ba1\u7b97\u673a\u5b58\u50a8\u6570\u636e\u7edf\u4e00\u4f7f\u7528\u8865\u7801\uff0c\u7406\u89e3\u8fd9\u4e09\u70b9\u5c31\u80fd\u5f7b\u5e95\u641e\u61c2\u5b57\u8282\u8f6c\u6362\u7684\u5e95\u5c42\u903b\u8f91\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001\u5b57\u7b26\u7f13\u51b2\u6d41<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b57\u7b26\u7f13\u51b2\u6d41\u5bf9\u5e94<code>BufferedReader<\/code>\uff08\u5b57\u7b26\u7f13\u51b2\u8f93\u5165\u6d41\uff09\u548c<code>BufferedWriter<\/code>\uff08\u5b57\u7b26\u7f13\u51b2\u8f93\u51fa\u6d41\uff09\uff0c\u4e13\u95e8\u7528\u6765\u5904\u7406<strong>\u6587\u672c\u6587\u4ef6<\/strong>\uff0c\u540c\u6837\u662f\u5bf9\u57fa\u7840\u5b57\u7b26\u6d41\u7684\u589e\u5f3a\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u5e38\u7528\u6784\u9020\u65b9\u6cd5<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>BufferedReader(Reader in)<\/code>\uff1a\u521b\u5efa\u5b57\u7b26\u7f13\u51b2\u8f93\u5165\u6d41<\/li>\n\n\n\n<li><code>BufferedWriter(Writer out)<\/code>\uff1a\u521b\u5efa\u5b57\u7b26\u7f13\u51b2\u8f93\u51fa\u6d41<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u7279\u6709\u6838\u5fc3\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b57\u7b26\u7f13\u51b2\u6d41\u62e5\u6709\u4e24\u4e2a\u4e13\u5c5e\u65b9\u6cd5\uff0c\u4e5f\u662f\u5b83\u533a\u522b\u4e8e\u666e\u901a\u5b57\u7b26\u6d41\u7684\u4eae\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><code>String readLine()<\/code>\uff1a<strong>\u6309\u884c\u8bfb\u53d6\u6587\u672c<\/strong>\uff0c\u8bfb\u53d6\u5230\u6587\u4ef6\u672b\u5c3e\u65f6\u8fd4\u56de<code>null<\/code>\uff0c\u65e5\u5e38\u8bfb\u53d6\u65e5\u5fd7\u3001\u914d\u7f6e\u6587\u4ef6\u8d85\u5b9e\u7528\uff1b<\/li>\n\n\n\n<li><code>void newLine()<\/code>\uff1a<strong>\u8de8\u5e73\u53f0\u6362\u884c<\/strong>\uff0c\u4f1a\u6839\u636e\u5f53\u524d\u64cd\u4f5c\u7cfb\u7edf\u81ea\u52a8\u9002\u914d\u6362\u884c\u7b26\uff0c\u66ff\u4ee3\u624b\u52a8\u5199<code>\\n<\/code>\u3001<code>\\r\\n<\/code>\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u4ee3\u7801\u793a\u4f8b\uff1a\u5b57\u7b26\u7f13\u51b2\u6d41\u8bfb\u5199\u6587\u672c\u6587\u4ef6<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.io.BufferedReader;\nimport java.io.BufferedWriter;\nimport java.io.FileReader;\nimport java.io.FileWriter;\nimport java.io.IOException;\n\n\/**\n * \u5b57\u7b26\u7f13\u51b2\u6d41\u8bfb\u5199\u6587\u672c\u6587\u4ef6\n * @author YunYang\n *\/\npublic class BufferedCharStreamDemo {\n    public static void main(String&#91;] args) {\n        String filePath = \"D:\/note.txt\";\n        String copyPath = \"D:\/copy_note.txt\";\n\n        \/\/ \u5199\u5165\u6587\u672c\n        try (BufferedWriter bw = new BufferedWriter(new FileWriter(filePath))) {\n            bw.write(\"Java IO \u7f13\u51b2\u6d41\u5b66\u4e60\u7b14\u8bb0\");\n            bw.newLine(); \/\/ \u7cfb\u7edf\u81ea\u52a8\u6362\u884c\n            bw.write(\"\u5b57\u8282\u7f13\u51b2\u6d41\u5904\u7406\u975e\u6587\u672c\u6587\u4ef6\");\n            bw.newLine();\n            bw.write(\"\u5b57\u7b26\u7f13\u51b2\u6d41\u5904\u7406\u6587\u672c\u6587\u4ef6\");\n            System.out.println(\"\u6587\u672c\u5199\u5165\u5b8c\u6210\uff01\");\n        } catch (IOException e) {\n            e.printStackTrace();\n        }\n\n        \/\/ \u6309\u884c\u8bfb\u53d6\u6587\u672c\u5e76\u590d\u5236\n        try (\n            BufferedReader br = new BufferedReader(new FileReader(filePath));\n            BufferedWriter bw = new BufferedWriter(new FileWriter(copyPath))\n        ) {\n            String line;\n            \/\/ \u9010\u884c\u8bfb\u53d6\uff0c\u8bfb\u5230\u672b\u5c3e\u8fd4\u56denull\n            while ((line = br.readLine()) != null) {\n                bw.write(line);\n                bw.newLine();\n            }\n            System.out.println(\"\u6587\u672c\u6587\u4ef6\u590d\u5236\u5b8c\u6210\uff01\");\n        } catch (IOException e) {\n            e.printStackTrace();\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001\u603b\u7ed3<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7f13\u51b2\u6d41\u672c\u8d28\u662f<strong>\u5305\u88c5\u6d41<\/strong>\uff0c\u5fc5\u987b\u4f9d\u8d56\u57fa\u7840\u5b57\u8282\u6d41 \/ \u5b57\u7b26\u6d41\u4f7f\u7528\uff0c\u6838\u5fc3\u4f18\u52bf\u662f\u501f\u52a9\u5185\u5b58\u7f13\u51b2\u533a\uff0c\u51cf\u5c11\u78c1\u76d8 IO \u6b21\u6570\uff0c\u63d0\u5347\u8bfb\u5199\u6548\u7387\uff1b<\/li>\n\n\n\n<li>\u5206\u7c7b\u4f7f\u7528\uff1a<strong>\u5b57\u8282\u7f13\u51b2\u6d41<\/strong>\u5904\u7406\u6240\u6709\u7c7b\u578b\u6587\u4ef6\uff08\u56fe\u7247\u3001\u89c6\u9891\u3001\u6587\u6863\u7b49\uff09\uff0c<strong>\u5b57\u7b26\u7f13\u51b2\u6d41<\/strong>\u53ea\u4e13\u6ce8\u6587\u672c\u6587\u4ef6\uff1b<\/li>\n\n\n\n<li>\u7279\u6027\u533a\u5206\uff1a\u5b57\u7b26\u7f13\u51b2\u6d41\u62e5\u6709<code>readLine()<\/code>\u6309\u884c\u8bfb\u53d6\u3001<code>newLine()<\/code>\u8de8\u5e73\u53f0\u6362\u884c\u4e24\u4e2a\u5b9e\u7528\u7279\u6709\u65b9\u6cd5\uff1b<\/li>\n\n\n\n<li>\u5f00\u53d1\u5efa\u8bae\uff1a\u65e5\u5e38\u505a\u6587\u4ef6\u8bfb\u5199\u3001\u6587\u4ef6\u62f7\u8d1d\u65f6\uff0c\u4f18\u5148\u4f7f\u7528\u7f13\u51b2\u6d41\uff0c\u5c24\u5176\u662f\u5927\u6587\u4ef6\u573a\u666f\uff0c\u6027\u80fd\u5dee\u8ddd\u4f1a\u975e\u5e38\u660e\u663e\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Java IO \u4f53\u7cfb\u7684\u77e5\u8bc6\u70b9\u662f\u8fde\u8d2f\u7684\uff0c\u524d\u9762\u6211\u4e5f\u6574\u7406\u4e86\u5b57\u8282\u6d41\u3001\u5b57\u7b26\u6d41\u7684\u8be6\u89e3\u6587\u7ae0\uff0c\u5927\u5bb6\u53ef\u4ee5\u642d\u914d\u8d77\u6765\u5b66\u4e60\uff0c\u4e00\u6b65\u6b65\u5403\u900f\u6574\u4e2a IO \u6846\u67b6\u3002\u540e\u7eed\u6211\u4e5f\u4f1a\u7ee7\u7eed\u66f4\u65b0 IO \u76f8\u5173\u7684\u9ad8\u7ea7\u7528\u6cd5\uff0c\u6b22\u8fce\u4e00\u8d77\u4ea4\u6d41\u5b66\u4e60\uff5e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5927\u5bb6\u597d\uff0c\u6700\u8fd1\u4e00\u76f4\u5728\u68b3\u7406 Java IO \u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u7ee7\u5b57\u8282\u6d41\u3001\u5b57\u7b26\u6d41\u4e4b\u540e\uff0c\u4eca\u5929\u6765\u548c\u5927\u5bb6\u6df1\u5165\u804a\u4e00\u804a\u7f13\u51b2\u6d41\u3002\u5728\u5b9e\u9645<\/p>\n<div class=\"more-link\">\n\t\t\t\t <a href=\"https:\/\/yunyanglib.cn\/?p=1516\" class=\"link-btn theme-btn\"><span>Read More <\/span> <i class=\"fa fa-caret-right\"><\/i><\/a>\n\t\t\t<\/div>\n","protected":false},"author":1,"featured_media":1518,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[15],"class_list":["post-1516","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java","tag-java"],"_links":{"self":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/1516","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1516"}],"version-history":[{"count":2,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/1516\/revisions"}],"predecessor-version":[{"id":1519,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/1516\/revisions\/1519"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/media\/1518"}],"wp:attachment":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1516"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1516"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}