本文实例为大家分享了java实现系统多级文件夹复制的具体代码,供大家参考,具体内容如下
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package com.jae; import java.io.*; //复制文件夹内的内容,包含多级文件夹 public class Test2 { public static void main(String[] args) throws Exception { //原文件夹地址 File resPath = new File( "E:\\Java\\分享" ); File destPath = new File( "E:\\" ); //method(resPath, destPath); copy(resPath, destPath); } public static void copy(File src,File dest) throws Exception { File newDir = new File(dest,src.getName()); newDir.mkdir(); File[] subFiles = src.listFiles(); for (File subFile : subFiles) { if (subFile.isFile()){ BufferedInputStream bis = new BufferedInputStream( new FileInputStream(subFile)); BufferedOutputStream bos = new BufferedOutputStream( new FileOutputStream( new File(newDir,subFile.getName()))); int b; byte [] bytes = new byte [ 1024 * 8 ]; while ((b = bis.read(bytes)) != - 1 ){ bos.write(bytes, 0 ,b); } bis.close(); bos.close(); } else { copy(subFile,newDir); //递归调用 } } } public static void method(File dir, File destPath) throws IOException { //获取源路径的文件 File[] files = dir.listFiles(); //根目录文件夹名 String name1 = dir.getName(); //遍历源路径的文件 for (File file : files) { if (file.isFile()) { StringBuilder sb = new StringBuilder(destPath.getAbsolutePath()); sb.append( "\\" ).append(file.getName()); //获取盘符后面的路径和文件名 //String s = absolutePath.split(":")[1]; //创建输入流,封装获取到的文件的绝对路径 FileInputStream fis = new FileInputStream(file.getAbsolutePath()); //目标路径,定义目标路径的盘符,和要复制的文件路径和文件名 //FileOutputStream fos = new FileOutputStream("F:" + s); FileOutputStream fos = new FileOutputStream(sb.toString()); //复制文件操作 int len; byte [] bytes = new byte [ 1024 * 8 ]; while ((len = fis.read(bytes)) != - 1 ) { fos.write(bytes, 0 , len); fos.flush(); } fos.close(); fis.close(); } else { StringBuilder sb = new StringBuilder(destPath.getAbsolutePath()); sb.append( "\\" ).append(name1).append( "\\" ).append(file.getName()); /*String name1 = file.getName(); //获取文件夹的路径 String name = file.getPath(); //获取盘符:后的文件夹路径 String s = name.split(":")[1];*/ //创建文件夹路径 //File file1 = new File("F:" + name1); File file1 = new File(sb.toString()); file1.mkdirs(); //System.out.println(name); method(file, file1); } } } } |
再为大家补充一段代码:Java递归复制多级目录及文件,感谢原作者的分享
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import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; /* * 需求:复制多级文件夹 * * 数据源:D:\\1 * 目的地:F:\\新建文件夹 * * 分析: * A:封装数据源File * B:封装目的地File * C:判断该File是文件夹还是文件 * a:是文件夹 * 就在目的地目录下创建该文件夹 * 获取该File对象下的所有文件或者文件夹File对象 * 遍历得到每一个File对象 * 回到C * b:是文件 * 就复制(字节流) */ public class C1 { public static void main(String[] args) throws IOException { File srcFolder = new File( "D:\\1" ); File dstFolder = new File( "F:\\新建文件夹" ); judge(srcFolder,dstFolder); } private static void judge(File srcFolder,File dstFolder) throws IOException { if (srcFolder.isDirectory()){ File newFolder = new File(dstFolder,srcFolder.getName()); newFolder.mkdir(); File[] fileArr = srcFolder.listFiles(); for (File f:fileArr){ judge(f, newFolder); } } else { File newFile = new File(dstFolder,srcFolder.getName()); // System.out.println(newFile); copyFile(srcFolder,newFile); } } private static void copyFile(File srcFolder, File newFile) throws IOException { // TODO Auto-generated method stub BufferedInputStream bis = new BufferedInputStream( new FileInputStream( srcFolder)); BufferedOutputStream bos = new BufferedOutputStream( new FileOutputStream(newFile)); byte[] bys = new byte[1024]; int len = 0; while ((len = bis.read(bys)) != -1) { bos.write(bys, 0, len); } bos.close(); bis.close(); } } |
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/weixin_41869890/article/details/90291932