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Java递归实现操作系统文件的复制、粘贴和删除功能
通过Java IO递归实现操作系统对文件的复制、粘贴和删除功能，剪切=复制+粘贴+删除
代码示例：
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import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; /** * achieve file copy and delete using recursion * * @author ForeverLover * */ public class FileCopyAndDelete { // delete files of this path public void deleteFile(String path) { File f = new File(path); if (f.isDirectory()) { File[] file = f.listFiles(); for (File file1 : file) { this.deleteFile(file1.toString()); file1.delete(); } } else { f.delete(); } f.delete(); } // copy files from path1 to path2 public void copyFiles(String path1, String path2) throws IOException { File f = new File(path1); if (f.isDirectory()) { File file = new File(path2); if (!file.exists()) file.mkdir(); File[] file1 = f.listFiles(); for (File file2 : file1) { copyFiles(file2.toString(), path2 + "/" + file2.getName()); } } else { copy(path1, path2); } } // copy file from path1 to path2 one by one public void copy(String path1, String path2) throws IOException { DataInputStream in = new DataInputStream(new BufferedInputStream( new FileInputStream(path1))); byte[] b = new byte[in.available()];// available返回实际可读字节数，即总大小 in.read(b); DataOutputStream out = new DataOutputStream(new BufferedOutputStream( new FileOutputStream(path2))); out.write(b); in.close(); out.close(); } // main method public static void main(String[] args) { FileCopyAndDelete f = new FileCopyAndDelete(); // test copy files using recursive /* * { String path1 = "D://Folder1"; String path2 = "D://Folder2"; try { * f.copyFiles(path1, path2); System.out.println("OK,COPY FINISH"); } * catch (IOException e) { e.printStackTrace(); } } */ // test delete files using recursive /* * { f.deleteFile("C://Folder1"); * System.out.println("OK,DELETE FINISH"); } */ } } |
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