java 拷贝[复制]文件夹工具类Fileutil整理

package main.java.java02.IO.fuzhi;

import java.io.*;

/**
 * @author:Mr.wang
 * @date:2019/2/21 0021 上午 10:32
 */
public class FileUtil {
    //文件夹拷贝    不管是路径还是File对象都可直接使用
    //拷贝文件夹方法
    // String 对象
    public static void copyDir(String srcPath,String destPath){
        File src=new File(srcPath);
        File dest=new File(destPath);
        copyDir(src,dest);
    }
    //拷贝文件夹方法
    //File 对象
    public static void copyDir(File src,File dest){
        if(src.isDirectory()){//文件夹
            dest=new File(dest,src.getName());
        }copyDirDetail(src,dest);
    }


    //拷贝文件夹细节
    public static void copyDirDetail(File src,File dest){
        if(src.isFile()){   //文件直接复制
            try {
                FileUtil.copyFile(src,dest);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }else if(src.isDirectory()){//目录
            //确保文件夹存在
            dest.mkdirs();
            //获取下一级目录|文件
            for (File sub:src.listFiles()){
                copyDirDetail(sub,new File(dest,sub.getName()));
            }
        }
    }

    //文件拷贝
    public static void copyFile(String srcPath, String destPath) throws IOException {
        File src=new File(srcPath);
        File dest=new File(destPath);
        copyFile(src,dest);
    }
    public static void copyFile(File srcPath, File destPath) throws IOException {

        //选择流
        InputStream is = new FileInputStream(srcPath);
        OutputStream os = new FileOutputStream(destPath);
        //拷贝  循环+读取+写出
        byte[] flush = new byte[1024];
        int len = 0;
        //读取
        while (-1 != (len = is.read(flush))) {
            //写出
            os.write(flush, 0, len);
        }
        os.flush();//强制刷出
        //关闭流  先打开后关闭
        os.close();
        is.close();
    }
}
调用方法:
public class fuzhiwenjianjiaTest01 {
    public static void main(String args[]) {
        //源目录
        String srcPath = "d:/a/b";
        //目标文件
        String destPath = "d:/a/d";
        FileUtil.copyDir(srcPath,destPath);
    }

}

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转载自blog.csdn.net/qq_33718794/article/details/87858444