{"id":1296,"date":"2022-10-29T22:50:16","date_gmt":"2022-10-29T14:50:16","guid":{"rendered":"https:\/\/qaqaq.top\/?p=1296"},"modified":"2022-11-27T12:39:47","modified_gmt":"2022-11-27T04:39:47","slug":"%e6%b3%9b%e5%9e%8b%e4%b8%8efile-file%e7%b1%bb%e7%9a%84%e8%af%be%e5%90%8e%e7%bb%83%e4%b9%a0","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=1296","title":{"rendered":"\u6cdb\u578b\u4e0eFile-File\u7c7b\u7684\u8bfe\u540e\u7ec3\u4e60"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P580;\r\n\r\nimport org.junit.jupiter.api.Test;\r\n\r\nimport java.io.File;\r\nimport java.io.IOException;\r\n\r\n\/**\r\n * @author RichieZhang\r\n * @create 2022-10-29 \u4e0b\u5348 4:22\r\n *\/\r\npublic class FileDemo {\r\n\r\n    @Test\r\n    public void test1() throws IOException {\r\n        File file = new File(\"C:\\\\Users\\\\ZRich\\\\Documents\\\\Code\\\\Java\\\\workspace_idea\\\\io\\\\io1\\\\hello.txt\");\r\n        \/\/\u521b\u5efa\u4e00\u4e2a\u4e0efile\u540c\u76ee\u5f55\u4e0b\u7684\u53e6\u5916\u4e00\u4e2a\u6587\u4ef6\uff0c\u6587\u4ef6\u540d\u4e3a\uff1ahaha.txt\r\n\r\n        File destFile = new File(file.getParent(),\"haha.txt\");\r\n        boolean newFile = destFile.createNewFile();\r\n        if (newFile){\r\n            System.out.println(\"\u521b\u5efa\u6210\u529f\uff01\");\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P580;\r\n\r\nimport org.junit.jupiter.api.Test;\r\n\r\nimport java.io.File;\r\nimport java.io.FilenameFilter;\r\n\r\n\/**\r\n * \u8bfe\u540e\u7ec3\u4e602\uff1a\u5224\u65ad\u6307\u5b9a\u76ee\u5f55\u4e0b\u662f\u5426\u6709\u540e\u7f00\u540d\u4e3a.jpg\u7684\u6587\u4ef6\uff0c\u5982\u679c\u6709\uff0c\u5c31\u8f93\u51fa\u8be5\u6587\u4ef6\u540d\u79f0\r\n * @author shkstart \u90ae\u7bb1\uff1ashkstart@126.com\r\n * @version  \u521b\u5efa\u65f6\u95f4\uff1a2019\u5e742\u670823\u65e5  \u4e0a\u53481:55:59\r\n *\r\n *\/\r\npublic class FindJPGFileTest {\r\n\r\n\t@Test\r\n\tpublic void test1(){\r\n\t\tFile srcFile = new File(\"d:\\\\code\");\r\n\t\t\r\n\t\tString&#91;] fileNames = srcFile.list();\r\n\t\tfor(String fileName : fileNames){\r\n\t\t\tif(fileName.endsWith(\".jpg\")){\r\n\t\t\t\tSystem.out.println(fileName);\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n\t@Test\r\n\tpublic void test2(){\r\n\t\tFile srcFile = new File(\"d:\\\\code\");\r\n\t\t\r\n\t\tFile&#91;] listFiles = srcFile.listFiles();\r\n\t\tfor(File file : listFiles){\r\n\t\t\tif(file.getName().endsWith(\".jpg\")){\r\n\t\t\t\tSystem.out.println(file.getAbsolutePath());\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n\t\/*\r\n\t * File\u7c7b\u63d0\u4f9b\u4e86\u4e24\u4e2a\u6587\u4ef6\u8fc7\u6ee4\u5668\u65b9\u6cd5\r\n\t * public String&#91;] list(FilenameFilter filter)\r\n\t * public File&#91;] listFiles(FileFilter filter)\r\n\r\n\t *\/\r\n\t@Test\r\n\tpublic void test3(){\r\n\t\tFile srcFile = new File(\"d:\\\\code\");\r\n\t\t\r\n\t\tFile&#91;] subFiles = srcFile.listFiles(new FilenameFilter() {\r\n\t\t\t\r\n\t\t\t@Override\r\n\t\t\tpublic boolean accept(File dir, String name) {\r\n\t\t\t\treturn name.endsWith(\".jpg\");\r\n\t\t\t}\r\n\t\t});\r\n\t\t\r\n\t\tfor(File file : subFiles){\r\n\t\t\tSystem.out.println(file.getAbsolutePath());\r\n\t\t}\r\n\t}\r\n\t\r\n}\r\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P580;\r\n\r\nimport java.io.File;\r\n\/**\r\n * 3. \u904d\u5386\u6307\u5b9a\u76ee\u5f55\u6240\u6709\u6587\u4ef6\u540d\u79f0\uff0c\u5305\u62ec\u5b50\u6587\u4ef6\u76ee\u5f55\u4e2d\u7684\u6587\u4ef6\u3002\r\n\t\u62d3\u5c551\uff1a\u5e76\u8ba1\u7b97\u6307\u5b9a\u76ee\u5f55\u5360\u7528\u7a7a\u95f4\u7684\u5927\u5c0f\r\n\t\u62d3\u5c552\uff1a\u5220\u9664\u6307\u5b9a\u6587\u4ef6\u76ee\u5f55\u53ca\u5176\u4e0b\u7684\u6240\u6709\u6587\u4ef6\r\n\r\n * @author shkstart \u90ae\u7bb1\uff1ashkstart@126.com\r\n * @version  \u521b\u5efa\u65f6\u95f4\uff1a2019\u5e742\u670823\u65e5  \u4e0a\u53481:55:31\r\n *\r\n *\/\r\npublic class ListFilesTest {\r\n\r\n\tpublic static void main(String&#91;] args) {\r\n\t\t\/\/ \u9012\u5f52:\u6587\u4ef6\u76ee\u5f55\r\n\t\t\/** \u6253\u5370\u51fa\u6307\u5b9a\u76ee\u5f55\u6240\u6709\u6587\u4ef6\u540d\u79f0\uff0c\u5305\u62ec\u5b50\u6587\u4ef6\u76ee\u5f55\u4e2d\u7684\u6587\u4ef6 *\/\r\n\r\n\t\t\/\/ 1.\u521b\u5efa\u76ee\u5f55\u5bf9\u8c61\r\n\t\tFile dir = new File(\"E:\\\\teach\\\\01_javaSE\\\\_\u5c1a\u7845\u8c37Java\u7f16\u7a0b\u8bed\u8a00\\\\3_\u8f6f\u4ef6\");\r\n\r\n\t\t\/\/ 2.\u6253\u5370\u76ee\u5f55\u7684\u5b50\u6587\u4ef6\r\n\t\tprintSubFile(dir);\r\n\t}\r\n\r\n\tpublic static void printSubFile(File dir) {\r\n\t\t\/\/ \u6253\u5370\u76ee\u5f55\u7684\u5b50\u6587\u4ef6\r\n\t\tFile&#91;] subfiles = dir.listFiles();\r\n\r\n\t\tfor (File f : subfiles) {\r\n\t\t\tif (f.isDirectory()) {\/\/ \u6587\u4ef6\u76ee\u5f55\r\n\t\t\t\tprintSubFile(f);\r\n\t\t\t} else {\/\/ \u6587\u4ef6\r\n\t\t\t\tSystem.out.println(f.getAbsolutePath());\r\n\t\t\t}\r\n\r\n\t\t}\r\n\t}\r\n\r\n\t\/\/ \u65b9\u5f0f\u4e8c\uff1a\u5faa\u73af\u5b9e\u73b0\r\n\t\/\/ \u5217\u51fafile\u76ee\u5f55\u7684\u4e0b\u7ea7\u5185\u5bb9\uff0c\u4ec5\u5217\u51fa\u4e00\u7ea7\u7684\u8bdd\r\n\t\/\/ \u4f7f\u7528File\u7c7b\u7684String&#91;] list()\u6bd4\u8f83\u7b80\u5355\r\n\tpublic void listSubFiles(File file) {\r\n\t\tif (file.isDirectory()) {\r\n\t\t\tString&#91;] all = file.list();\r\n\t\t\tfor (String s : all) {\r\n\t\t\t\tSystem.out.println(s);\r\n\t\t\t}\r\n\t\t} else {\r\n\t\t\tSystem.out.println(file + \"\u662f\u6587\u4ef6\uff01\");\r\n\t\t}\r\n\t}\r\n\r\n\t\/\/ \u5217\u51fafile\u76ee\u5f55\u7684\u4e0b\u7ea7\uff0c\u5982\u679c\u5b83\u7684\u4e0b\u7ea7\u8fd8\u662f\u76ee\u5f55\uff0c\u63a5\u7740\u5217\u51fa\u4e0b\u7ea7\u7684\u4e0b\u7ea7\uff0c\u4f9d\u6b21\u7c7b\u63a8\r\n\t\/\/ \u5efa\u8bae\u4f7f\u7528File\u7c7b\u7684File&#91;] listFiles()\r\n\tpublic void listAllSubFiles(File file) {\r\n\t\tif (file.isFile()) {\r\n\t\t\tSystem.out.println(file);\r\n\t\t} else {\r\n\t\t\tFile&#91;] all = file.listFiles();\r\n\t\t\t\/\/ \u5982\u679call&#91;i]\u662f\u6587\u4ef6\uff0c\u76f4\u63a5\u6253\u5370\r\n\t\t\t\/\/ \u5982\u679call&#91;i]\u662f\u76ee\u5f55\uff0c\u63a5\u7740\u518d\u83b7\u53d6\u5b83\u7684\u4e0b\u4e00\u7ea7\r\n\t\t\tfor (File f : all) {\r\n\t\t\t\tlistAllSubFiles(f);\/\/ \u9012\u5f52\u8c03\u7528\uff1a\u81ea\u5df1\u8c03\u7528\u81ea\u5df1\u5c31\u53eb\u9012\u5f52\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n\r\n\t\/\/ \u62d3\u5c551\uff1a\u6c42\u6307\u5b9a\u76ee\u5f55\u6240\u5728\u7a7a\u95f4\u7684\u5927\u5c0f\r\n\t\/\/ \u6c42\u4efb\u610f\u4e00\u4e2a\u76ee\u5f55\u7684\u603b\u5927\u5c0f\r\n\tpublic long getDirectorySize(File file) {\r\n\t\t\/\/ file\u662f\u6587\u4ef6\uff0c\u90a3\u4e48\u76f4\u63a5\u8fd4\u56defile.length()\r\n\t\t\/\/ file\u662f\u76ee\u5f55\uff0c\u628a\u5b83\u7684\u4e0b\u4e00\u7ea7\u7684\u6240\u6709\u5927\u5c0f\u52a0\u8d77\u6765\u5c31\u662f\u5b83\u7684\u603b\u5927\u5c0f\r\n\t\tlong size = 0;\r\n\t\tif (file.isFile()) {\r\n\t\t\tsize += file.length();\r\n\t\t} else {\r\n\t\t\tFile&#91;] all = file.listFiles();\/\/ \u83b7\u53d6file\u7684\u4e0b\u4e00\u7ea7\r\n\t\t\t\/\/ \u7d2f\u52a0all&#91;i]\u7684\u5927\u5c0f\r\n\t\t\tfor (File f : all) {\r\n\t\t\t\tsize += getDirectorySize(f);\/\/ f\u7684\u5927\u5c0f;\r\n\t\t\t}\r\n\t\t}\r\n\t\treturn size;\r\n\t}\r\n\r\n\t\/\/ \u62d3\u5c552\uff1a\u5220\u9664\u6307\u5b9a\u7684\u76ee\u5f55\r\n\tpublic void deleteDirectory(File file) {\r\n\t\t\/\/ \u5982\u679cfile\u662f\u6587\u4ef6\uff0c\u76f4\u63a5delete\r\n\t\t\/\/ \u5982\u679cfile\u662f\u76ee\u5f55\uff0c\u5148\u628a\u5b83\u7684\u4e0b\u4e00\u7ea7\u5e72\u6389\uff0c\u7136\u540e\u5220\u9664\u81ea\u5df1\r\n\t\tif (file.isDirectory()) {\r\n\t\t\tFile&#91;] all = file.listFiles();\r\n\t\t\t\/\/ \u5faa\u73af\u5220\u9664\u7684\u662ffile\u7684\u4e0b\u4e00\u7ea7\r\n\t\t\tfor (File f : all) {\/\/ f\u4ee3\u8868file\u7684\u6bcf\u4e00\u4e2a\u4e0b\u7ea7\r\n\t\t\t\tdeleteDirectory(f);\r\n\t\t\t}\r\n\t\t}\r\n\t\t\/\/ \u5220\u9664\u81ea\u5df1\r\n\t\tfile.delete();\r\n\t}\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-1296","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\/1296"}],"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=1296"}],"version-history":[{"count":1,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1296\/revisions"}],"predecessor-version":[{"id":1297,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1296\/revisions\/1297"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1296"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1296"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1296"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}