读取网络图片并输出zip压缩包(单文件夹/多文件夹)示例

目录

 

需求

结果示例

示例1

示例2

源码

总结

---

需求

将图片按照不同的分组存放在不同的文件夹下，然后打包输出。

结果示例

展示的是解压后的文件夹

示例1

示例2

源码

package com.asyf.zip_demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.Date;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

@SpringBootApplication
@RestController
public class ZipDemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(ZipDemoApplication.class, args);
        System.out.println("http://localhost:8080/test");
        System.out.println("http://localhost:8080/download");
        System.out.println("http://localhost:8080/downloadSplitFloder");
    }

    @RequestMapping(value = "test")
    public String test() {
        return new Date().toString();
    }

    @RequestMapping(value = "download")
    public void download(HttpServletRequest request, HttpServletResponse response) {
        try {
            String downloadFilename = "图片在一个文件夹.zip";//文件的名称
            downloadFilename = URLEncoder.encode(downloadFilename, "UTF-8");//转换中文否则可能会产生乱码
            response.setContentType("application/octet-stream");// 指明response的返回对象是文件流
            response.setHeader("Content-Disposition", "attachment;filename=" + downloadFilename);// 设置在下载框默认显示的文件名
            ZipOutputStream zos = new ZipOutputStream(response.getOutputStream());
            String[] files = new String[]{"http://okyd.oss-cn-beijing.aliyuncs.com/img/157164690500022537.jpg", "http://okyd.oss-cn-beijing.aliyuncs.com/img/157164694074782832.jpg"};
            for (int i = 0; i < files.length; i++) {
                URL url = new URL(files[i]);
                zos.putNextEntry(new ZipEntry(i + ".jpg"));
                //读取网络文件
                InputStream fis = url.openConnection().getInputStream();
                byte[] buffer = new byte[1024];
                int r = 0;
                while ((r = fis.read(buffer)) != -1) {
                    zos.write(buffer, 0, r);
                }
                fis.close();
            }
            zos.flush();
            zos.close();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @RequestMapping(value = "downloadSplitFloder")
    public void downloadSplitFloder(HttpServletRequest request, HttpServletResponse response) {
        try {
            String downloadFilename = "图片分成2个文件夹.zip";//文件的名称
            downloadFilename = URLEncoder.encode(downloadFilename, "UTF-8");//转换中文否则可能会产生乱码
            response.setContentType("application/octet-stream");// 指明response的返回对象是文件流
            response.setHeader("Content-Disposition", "attachment;filename=" + downloadFilename);// 设置在下载框默认显示的文件名
            ZipOutputStream zos = new ZipOutputStream(response.getOutputStream());
            String[] files = new String[]{"http://okyd.oss-cn-beijing.aliyuncs.com/img/157164690500022537.jpg", "http://okyd.oss-cn-beijing.aliyuncs.com/img/157164694074782832.jpg"};
            for (int i = 0; i < files.length; i++) {
                URL url = new URL(files[i]);
                zos.putNextEntry(new ZipEntry("文件夹" + i + "/" + i + ".jpg"));
                //读取网络文件
                InputStream fis = url.openConnection().getInputStream();
                byte[] buffer = new byte[1024];
                int r = 0;
                while ((r = fis.read(buffer)) != -1) {
                    zos.write(buffer, 0, r);
                }
                fis.close();
            }
            zos.flush();
            zos.close();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}

总结

zos设置文件时加入“/”,区分目录即可。

关键代码:zos.putNextEntry(new ZipEntry("文件夹" + i + "/" + i + ".jpg"));