java复制文件夹

一、复制单级文件夹

 

package com.itbianma02;

import java.io.*;

public class Demo {
    public static void main(String[] args) throws IOException {
        File srcFolder=new File("D:\\资料库\\人事");
        String srcFolderName= srcFolder.getName();
        File desFolder=new File("myDemo",srcFolderName);
        if (!desFolder.exists()){
            desFolder.mkdir();
        }
        File[] listFiles=srcFolder.listFiles();
        for(File srcFile:listFiles){
            String srcFileName=srcFile.getName();
            File desFile=new File(desFolder,srcFileName);
            copyFile(srcFile,desFile);
        }
    }

    private static void copyFile(File srcFile, File desFile) throws IOException {
        BufferedInputStream bis=new BufferedInputStream(new FileInputStream(srcFile));
        BufferedOutputStream bos=new BufferedOutputStream(new FileOutputStream(desFile));
        byte[] bys=new byte[1024];
        int len;
        while ((len= bis.read(bys))!=-1){
            bos.write(bys,0,len);
        }
        bis.close();
        bos.close();
    }
}

 

二、复制多级文件夹

 

package com.itbianma02;

import java.io.*;

public class Demo1 {
    public static void main(String[] args) throws IOException {
        File srcFile=new File("D:\\资料库\\需求");
        File desFile=new File("myDemo");
        copyFolder(srcFile,desFile);
    }

    private static void copyFolder(File srcFile, File desFile) throws IOException {
        if (srcFile.isDirectory()){
            String srcFolderName= srcFile.getName();
            File newFolder=new File(desFile,srcFolderName);
            if(!newFolder.exists()){
                newFolder.mkdir();
            }
            File[] fileArray=srcFile.listFiles();
            for(File file:fileArray){
                copyFolder(file,newFolder);
            }
        }else{
            File newFile=new File(desFile,srcFile.getName());
            copyFile(srcFile,newFile);
        }
    }

    private static void copyFile(File srcFile, File desFile) throws IOException {
        BufferedInputStream bis=new BufferedInputStream(new FileInputStream(srcFile));
        BufferedOutputStream bos=new BufferedOutputStream(new FileOutputStream(desFile));
        byte[] bys=new byte[1024];
        int len;
        while ((len= bis.read(bys))!=-1){
            bos.write(bys,0,len);
        }
        bis.close();
        bos.close();
    }
}

 

三、复制文件的异常处理

 

1、标准方法

 

 2、JDK7之后的改进

 

3、JDK9之后的改进

 

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