【Java】IO流--文件夹的复制

目标：复制一个文件夹下所有的文件及目录

问题分解

1.复制一个文件到指定位置

2.复制指定目录下的所有文件到指定位置

3.复制指定目录下所有是文件及目录到指定位置

代码

1.复制一个文件到指定位置

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class TestCopyFile {
    public static void copyOneFile(File src,File dest) {
        BufferedInputStream bis=null;
        BufferedOutputStream bos=null;
        try {
            bis = new BufferedInputStream(new FileInputStream(src));
            bos = new BufferedOutputStream(new FileOutputStream(dest));
            
            byte[] buf=new byte[1024];
            int len=-1;
            
            while((len=bis.read(buf))!=-1) {
                bos.write(buf, 0, len);
            }
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally {
            if(bos!=null) {
                try {
                    bos.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            if(bis!=null) {
                try {
                    bis.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }
    
    public static void main(String[] args) {
        File src=new File("D:\Test\恋する彼女の不器用な舞台 Visual Fan Book (JPG).zip");
        File dest=new File("F:\恋する彼女の不器用な舞台 Visual Fan Book (JPG).zip");
        copyOneFile(src, dest);
    }
}

2.复制指定目录下的所有文件到指定位置

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class TestCopyFile {
    public static void copyOneFile(File src,File dest) {
        BufferedInputStream bis=null;
        BufferedOutputStream bos=null;
        try {
            bis = new BufferedInputStream(new FileInputStream(src));
            bos = new BufferedOutputStream(new FileOutputStream(dest));
            
            byte[] buf=new byte[1024];
            int len=-1;
            
            while((len=bis.read(buf))!=-1) {
                bos.write(buf, 0, len);
            }
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally {
            if(bos!=null) {
                try {
                    bos.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            if(bis!=null) {
                try {
                    bis.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }
    
    public static void copyAllFiles(File src,File dest) {
        if(!dest.exists()) {
            dest.mkdir();
        }
        File[] flies=src.listFiles();
        for (File file : flies) {
            if(file.isFile()) {
                copyOneFile(new File(src+"\"+file.getName()) ,new File(dest+"\"+file.getName()));
            }
        }
    }
    
    public static void main(String[] args) {
        File src=new File("D:\Test");
        File dest=new File("F:\Test");
        copyAllFiles(src, dest);
    }
}

3.复制指定目录下所有是文件及目录到指定位置

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class TestCopyFile {
    public static void copyOneFile(File src,File dest) {
        BufferedInputStream bis=null;
        BufferedOutputStream bos=null;
        try {
            bis = new BufferedInputStream(new FileInputStream(src));
            bos = new BufferedOutputStream(new FileOutputStream(dest));
            
            byte[] buf=new byte[1024];
            int len=-1;
            
            while((len=bis.read(buf))!=-1) {
                bos.write(buf, 0, len);
            }
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally {
            if(bos!=null) {
                try {
                    bos.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            if(bis!=null) {
                try {
                    bis.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }
    
    public static void copyAllFiles(File src,File dest) {
        if(!dest.exists()) {
            dest.mkdir();
        }
        File[] flies=src.listFiles();
        for (File file : flies) {
            if(file.isFile()) {
                copyOneFile(new File(src+"\"+file.getName()) ,new File(dest+"\"+file.getName()));
            }else {
                copyAllFiles(new File(src+"\"+file.getName()) ,new File(dest+"\"+file.getName()));
            }
        }
    }
    
    public static void main(String[] args) {
        File src=new File("D:\Test");
        File dest=new File("F:\Test");
        copyAllFiles(src, dest);
    }
}