java将网络图片下载并压缩导出到本地

java将网络图片下载并压缩导出到本地

package com.example.demo.ChartGraphics.test;

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipOutputStream;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;

public class FileZipUtils {
    public static void main(String[] args) throws Exception {
        // 图片换为自己的
        String img1 = "https://t8.baidu.com/it/u=3571592872,3353494284&fm=79&app=86&size=h300&n=0&g=4n&f=jpeg?sec=1596419791&t=e6da8d794d05896b185a260b7f9c0bc2%E3%80%81";
        String img2 = "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1595825071518&di=1ba0947fc048487bf7908cc185ea4e75&imgtype=0&src=http%3A%2F%2Ft7.baidu.com%2Fit%2Fu%3D3616242789%2C1098670747%26fm%3D79%26app%3D86%26f%3DJPEG%3Fw%3D900%26h%3D1350";
        String[] files = new String[]{img1,img2};
        String fileStr = "D:\\image";
        String zipFileStr = "D:\\image1.zip";
        FileZipUtils f=new FileZipUtils();
        f.FileMain(files,fileStr,zipFileStr);

    }
    public void FileMain(String[] files,String fileStr,String zipFileStr)  throws Exception{
        try {
            // 创建一个文件夹
            File file = new File(fileStr);
            file.mkdirs();
            //多个图片下载地址
            for(int i=0;i srcFiles , OutputStream out)throws RuntimeException {
        long start = System.currentTimeMillis();
        ZipOutputStream zos = null ;
        try {
            zos = new ZipOutputStream(out);
            for (File srcFile : srcFiles) {
                byte[] buf = new byte[2 * 1024];
                zos.putNextEntry(new ZipEntry(srcFile.getName()));
                int len;
                FileInputStream in = new FileInputStream(srcFile);
                while ((len = in.read(buf)) != -1){
                    zos.write(buf, 0, len);
                }
                zos.closeEntry();
                in.close();
            }
            long end = System.currentTimeMillis();
            System.out.println("压缩完成，耗时：" + (end - start) +" ms");
        } catch (Exception e) {
            throw new RuntimeException("zip error from ZipUtils",e);
        }finally{
            if(zos != null){
                try {
                    zos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    /**
     * 得到图片的二进制数据，以二进制封装得到数据，具有通用性
     * @param inStream
     * @return
     * @throws Exception
     */
    private byte[] readInputStream(InputStream inStream) throws Exception{
        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
        //创建一个Buffer字符串
        byte[] buffer = new byte[1024];
        //每次读取的字符串长度，如果为-1，代表全部读取完毕
        int len = 0;
        //使用一个输入流从buffer里把数据读取出来
        while( (len=inStream.read(buffer)) != -1 ){
            //用输出流往buffer里写入数据，中间参数代表从哪个位置开始读，len代表读取的长度
            outStream.write(buffer, 0, len);
        }
        //关闭输入流
        inStream.close();
        //把outStream里的数据写入内存
        return outStream.toByteArray();
    }

    /**
     * 删除文件夹
     * @param folderPath 文件夹完整绝对路径
     * @return
     */
    public static void delFolder(String folderPath) {
        try {
            delAllFile(folderPath); //删除完里面所有内容
            String filePath = folderPath;
            filePath = filePath.toString();
            java.io.File myFilePath = new java.io.File(filePath);
            myFilePath.delete(); //删除空文件夹
            System.out.println("删除文件夹操作成功！");
        }
        catch (Exception e) {
           String message = ("删除文件夹操作出错");
        }
    }


    /**
     * 删除指定文件夹下所有文件
     * @param path 文件夹完整绝对路径
     * @return
     * @return
     */
    public static boolean delAllFile(String path) {
        boolean bea = false;
        File file = new File(path);
        if (!file.exists()) {
            return bea;
        }
        if (!file.isDirectory()) {
            return bea;
        }
        String[] tempList = file.list();
        File temp = null;
        for (int i = 0; i < tempList.length; i++) {
            if (path.endsWith(File.separator)) {
                temp = new File(path + tempList[i]);
            }else{
                temp = new File(path + File.separator + tempList[i]);
            }
            if (temp.isFile()) {
                temp.delete();
            }
            if (temp.isDirectory()) {
                delAllFile(path+"/"+ tempList[i]);//先删除文件夹里面的文件
                delFolder(path+"/"+ tempList[i]);//再删除空文件夹
                bea = true;
            }
        }
        return bea;
    }
}