Java实现文件或文件夹的复制到指定目录实例

时间:2022-06-20 05:37:09

整理文档,搜刮出一个Java实现文件或文件夹的复制到指定目录的代码,稍微整理精简一下做下分享。

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import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
 
public class Test {
  private static int a = 5;
 
  public static void main(String[] args) {
    //需要复制的目标文件或目标文件夹
    String pathname = "C:/Users/likun/Desktop/git_project";
    File file = new File(pathname);
    //复制到的位置
    String topathname = "C:/Users/likun/Desktop/movie";
    File toFile = new File(topathname);
    try {
      copy(file, toFile);
    } catch (Exception e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }
 
  public static void copy(File file, File toFile) throws Exception {
    byte[] b = new byte[1024];
    int a;
    FileInputStream fis;
    FileOutputStream fos;
    if (file.isDirectory()) {
      String filepath = file.getAbsolutePath();
      filepath=filepath.replaceAll("\\\\", "/");
      String toFilepath = toFile.getAbsolutePath();
      toFilepath=toFilepath.replaceAll("\\\\", "/");
      int lastIndexOf = filepath.lastIndexOf("/");
      toFilepath = toFilepath + filepath.substring(lastIndexOf ,filepath.length());
      File copy=new File(toFilepath);
      //复制文件夹
      if (!copy.exists()) {
        copy.mkdir();
      }
      //遍历文件夹
      for (File f : file.listFiles()) {
        copy(f, copy);
      }
    } else {
      if (toFile.isDirectory()) {
        String filepath = file.getAbsolutePath();
        filepath=filepath.replaceAll("\\\\", "/");
        String toFilepath = toFile.getAbsolutePath();
        toFilepath=toFilepath.replaceAll("\\\\", "/");
        int lastIndexOf = filepath.lastIndexOf("/");
        toFilepath = toFilepath + filepath.substring(lastIndexOf ,filepath.length());
         
        //写文件
        File newFile = new File(toFilepath);
        fis = new FileInputStream(file);
        fos = new FileOutputStream(newFile);
        while ((a = fis.read(b)) != -1) {
          fos.write(b, 0, a);
        }
      } else {
        //写文件
        fis = new FileInputStream(file);
        fos = new FileOutputStream(toFile);
        while ((a = fis.read(b)) != -1) {
          fos.write(b, 0, a);
        }
      }
 
    }
  }
 
}

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原文链接:http://blog.csdn.net/qq_22672291/article/details/68064194