java 文件、文件夹递归复制、移动

本是古典何须时尚 2022-07-14 12:26 335阅读 0赞

package com.mayflay.utils;
    
    import java.io.*;
    
    /** * 文件、文件夹 递归复制、移动 * @Author: mihuajun 【kobe96688@126.com】 * @Date: 12/9/2016 10:22 AM */
    
    public class FileUtils { 
        public static void copy(File sourceFileOrDir,File targetDir) {
            verifyExists(sourceFileOrDir);
            execute(sourceFileOrDir,targetDir,false);
        }
        public static void move(File sourceFileOrDir,File targetDir) {
            verifyExists(sourceFileOrDir);
            execute(sourceFileOrDir,targetDir,true);
        }
    
        public static void copyChild(File sourceDir,File targetDir) {
            verifyExists(sourceDir);
            verifyDir(sourceDir);
            for(File item : sourceDir.listFiles()){
                execute(item,targetDir,false);
            }
        }
    
        public static void moveChild(File sourceDir,File targetDir){
            verifyExists(sourceDir);
            verifyDir(sourceDir);
    
            for(File item : sourceDir.listFiles()){
                execute(item,targetDir,true);
            }
        }
    
        private static void execute(File sourceFileOrDir,File targetDir,Boolean isRemove) {
            if(!targetDir.exists())targetDir.mkdirs();
            File newTargetFile = new File(targetDir.getAbsolutePath()+File.separator+sourceFileOrDir.getName());
            if(sourceFileOrDir.isDirectory()){
                newTargetFile.mkdir();
                for(File item : sourceFileOrDir.listFiles()){
                    FileUtils.execute(item,newTargetFile,isRemove);
                }
                if(isRemove){
                    sourceFileOrDir.delete();
                }
                return;
            }
    
            FileInputStream fileInputStream = null;
            FileOutputStream fileOutputStream = null;
            try {
                fileInputStream = new FileInputStream(sourceFileOrDir);
                fileOutputStream = new FileOutputStream(newTargetFile);
    
                byte[] buff = new byte[1000];
                int len = 0;
                while((len = fileInputStream.read(buff))!=-1){
                    fileOutputStream.write(buff,0,len);
                }
                fileInputStream.close();
                fileOutputStream.close();
                if(isRemove){
                    sourceFileOrDir.delete();
                }
            }catch (Exception e){
                e.printStackTrace();
            }finally {
                if(fileInputStream != null) try {fileInputStream.close();} catch (IOException e) {e.printStackTrace();}
                if(fileOutputStream != null)try {fileOutputStream.close();} catch (IOException e) {e.printStackTrace();}
            }
        }
    
        private static void verifyExists(File file){
            if(!file.exists()){
                throw new RuntimeException(file.getAbsolutePath()+" is not exists");
            }
        }
        private static void verifyDir(File dir){
            if(!dir.isDirectory()){
                throw new RuntimeException(dir.getAbsolutePath()+" is not directory");
            }
        }
    }