文件操作

复制：

/**
     * 图片复制
     * @param source  xx/a.png
     * @param target  xx/b.png
     * @throws IOException
     */
    public static void copyPicture(String source,String target) throws IOException{
        File file = new File(target);
        if(!file.exists()){
            file.getParentFile().mkdirs();
        }
        file.createNewFile();

        //创建流对象
        DataInputStream dis=new DataInputStream(new FileInputStream(source));
        DataOutputStream dos=new DataOutputStream(new FileOutputStream(target));
        int temp;
        //读写数据
        while((temp=dis.read())!=-1){//读数据
            dos.write(temp);
        }
        //关闭流
        dis.close();
        dos.close();
    }

压缩 zip 

package zip;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

// Used to zip a file
public class FileZipper {
    private static final int BUFFER = 512;
    
    public boolean compressFilesToZip(String[] files,String zipfile) {
        return rugularZip(files,zipfile);
    }
    
    private boolean rugularZip(String[] fromFiles,String toFile) {
        File zipFile=new File(toFile);
        byte[] buffer=new byte[BUFFER];
        int readLen=0;
        
        try {
            ZipOutputStream zipOut=new ZipOutputStream(new FileOutputStream(zipFile)) ;

            int index=0;
            for(String file:fromFiles) {
                File fileWillZip=new File(file);
                
                if(fileWillZip.exists()) {
                    InputStream inputStream=new BufferedInputStream(new FileInputStream(fileWillZip));
                    String entryName="#"+index+"_"+fileWillZip.getName();// entryName should be a valid filename,no path seperater allowed
                    zipOut.putNextEntry(new ZipEntry(entryName));
    
                    while((readLen=inputStream.read(buffer,0,BUFFER))!=-1) {
                        zipOut.write(buffer,0,readLen);
                    }
                    inputStream.close();    
                    
                    index++;
                }
            }

            zipOut.close();
        }catch(Exception e) {
            e.printStackTrace();
            return false;
        }
        
        return true;
    }
    
    public static void main(String[] args) {
        String[] files= {"D:\wallpaper\5760666873360998521.jpg",
                         "D:\wallpaper\luda1.jpg",
                         "D:\wallpaper\luda2.jpg",
                         "D:\wallpaper\luda3.jpg",
                         "D:\wallpaper\luda4.jpg",
                         "D:\wallpaper\sheeps.jpg"};
        String zipfile="D:\wallpaper\result.zip";
        
        FileZipper fz=new FileZipper();
        fz.compressFilesToZip(files, zipfile);
    }
}

此文进阶请见：https://www.cnblogs.com/xiandedanteng/p/12155957.html

参考： https://www.cnblogs.com/xiandedanteng/p/12155471.html