Netty——Files类的walkFileTree方法拷贝多级目录

Posted 2022-08-07 小志的博客

一、walkFileTree方法拷贝多级目录

• 代码示例

  package com.example.nettytest.nio.day2;
  
  import java.io.IOException;
  import java.nio.file.*;
  import java.nio.file.attribute.BasicFileAttributes;
  import java.util.concurrent.atomic.AtomicInteger;
  
  /**
   * @description:
   * @author: xz
   * @create: 2022-07-31 11:08
   */
  public class TestWalkFileTree 
      public static void main(String[] args) throws IOException 
          copyMoreDirectory();
      
       /**
       * 拷贝多级目录
       * */
      private static void copyMoreDirectory() throws IOException 
          long start = System.currentTimeMillis();
          String source = "E:\\\\apache-tomcat-8.5.78-副本";
          String target = "E:\\\\apache-tomcat-8.5.78-副本-666";
          //拷贝多级目录
          Files.walk(Paths.get(source)).forEach(path -> 
              //原路径替换成一个新的路径
              String targetName = path.toString().replace(source, target);
              //如果是目录
              if(Files.isDirectory(path))
                  try 
                      Files.createDirectory(Paths.get(targetName));
                   catch (IOException e) 
                      e.printStackTrace();
                  
              
              //如果是普通文件
              if(Files.isRegularFile(path))
                  //拷贝
                  try 
                      Files.copy(path, Paths.get(targetName));
                   catch (IOException e) 
                      e.printStackTrace();
                  
              
          );
          long end = System.currentTimeMillis();
          System.out.println("计算出拷贝文件的时间差===="+(end - start));
      
  
  

• 输出结果