Java will package the specified file (including file list) or the directory under the specified path into zip format

Operating environment

• 1、springboot 2.2.x
• 2、maven 3.5.4

pom dependency

		<!--zip压缩依赖-->
        <dependency>
            <groupId>org.apache.ant</groupId>
            <artifactId>ant</artifactId>
            <version>1.10.7</version>
        </dependency>
        <!--注意当你的项目是web项目时，下面的依赖可以不用添加，因为springboot的web起步依赖中含有这个依赖，
        若是你的项目希望这个可以使zip压缩成为一个可用的工具类，强烈建议加上-->
        <!--压缩文件回传浏览器的依赖包-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>

Tools for generating zip

package com.cloud.docment.zip.utils;

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

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.ArrayList;
import java.util.List;

/**
 * @Author: Rao
 * @DateTime: 2020/5/12 14:33
 * @Description: 将目标文件或者目录进行zip格式打包的工具类
 */
public class ZipGenerateUtils {

    private ZipGenerateUtils() {

    }
    /**
     * 把文件打成压缩包并保存在本地硬盘
     *
     * @param srcfiles
     * @param zipPath
     */
    public static void ZipFiles(List srcfiles, String zipPath) {

        byte[] buf = new byte[4096];
        ZipOutputStream out = null;
        try {
            // 创建zip输出流
            out = new ZipOutputStream(new FileOutputStream(zipPath));

            // 循环将源文件列表添加到zip文件中
            for (int i = 0; i < srcfiles.size(); i++) {
                File file = new File((String) srcfiles.get(i));
                FileInputStream in = new FileInputStream(file);
                String fileName = file.getName();

                // 将文件名作为zip的Entry存入zip文件中
                out.putNextEntry(new ZipEntry(fileName));
                int len;
                while ( (len = in.read(buf)) > 0) {
                    out.write(buf, 0, len);
                }
                out.closeEntry();
                in.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (null != out) {
                try {
                    out.close();
                    out = null;
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    /**
     * 把文件列表打成压缩包并输出到客户端浏览器中
     *
     * @param request
     * @param response
     * @param srcFiles
     * @param downloadZipFileName
     */
    public static void ZipFiles(HttpServletRequest request, HttpServletResponse response, List srcFiles, String downloadZipFileName) {

        byte[] buf = new byte[4096];
        try {
            // Create the ZIP file
            // ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipPath));
            ZipOutputStream out = new ZipOutputStream(response.getOutputStream());//--设置成这样可以不用保存在本地,再输出,通过response流输出,直接输出到客户端浏览器中。

            // Compress the files
            if (request.getHeader("User-Agent").toLowerCase().indexOf("firefox") > 0) {
                downloadZipFileName = new String(downloadZipFileName.getBytes("GB2312"),"ISO-8859-1");
            } else {
                // 对文件名进行编码处理中文问题
                downloadZipFileName = java.net.URLEncoder.encode(downloadZipFileName, "UTF-8");// 处理中文文件名的问题
                downloadZipFileName = new String(downloadZipFileName.getBytes("UTF-8"), "GBK");// 处理中文文件名的问题
            }

            response.reset(); // 重点突出
            response.setCharacterEncoding("UTF-8"); // 重点突出
            response.setContentType("application/x-msdownload");// 不同类型的文件对应不同的MIME类型 // 重点突出

            // inline在浏览器中直接显示，不提示用户下载
            // attachment弹出对话框，提示用户进行下载保存本地
            // 默认为inline方式
            response.setHeader("Content-Disposition", "attachment;filename=" + downloadZipFileName);

            for (int i = 0; i < srcFiles.size(); i++) {

                File file = new File((String) srcFiles.get(i));
                FileInputStream in = new FileInputStream(file);
                // Add ZIP entry to output stream.
                String fileName = file.getName();
                out.putNextEntry(new ZipEntry(fileName));
                // Transfer bytes from the file to the ZIP file
                int len;
                while ( (len = in.read(buf)) > 0) {
                    out.write(buf, 0, len);
                }
                // Complete the entry
                out.closeEntry();
                in.close();
            }
            // Complete the ZIP file
            out.close();
            System.out.println("压缩完成.");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * 把文件目录打成压缩包并输出到客户端浏览器中
     *
     * @param request
     * @param response
     * @param sourcePath
     * @param downloadZipFileName
     */
    public static void createZip(HttpServletRequest request, HttpServletResponse response, String sourcePath, String downloadZipFileName) {

        byte[] buf = new byte[4096];
        FileOutputStream fos = null;
        ZipOutputStream out = null;
        try {
            out = new ZipOutputStream(response.getOutputStream());//--设置成这样可以不用保存在本地,再输出,通过response流输出,直接输出到客户端浏览器中。
            out.setEncoding("gbk");//此处修改字节码方式。
            if (request.getHeader("User-Agent").toLowerCase().indexOf("firefox") > 0) {
                downloadZipFileName = new String(downloadZipFileName.getBytes("GB2312"),"ISO-8859-1");
            } else {
                // 对文件名进行编码处理中文问题
                downloadZipFileName = java.net.URLEncoder.encode(downloadZipFileName, "UTF-8");// 处理中文文件名的问题
                downloadZipFileName = new String(downloadZipFileName.getBytes("UTF-8"), "GBK");// 处理中文文件名的问题
            }

            response.reset(); // 重点突出
            response.setCharacterEncoding("UTF-8"); // 重点突出
            response.setContentType("application/x-msdownload");// 不同类型的文件对应不同的MIME类型 // 重点突出

            // 默认为inline方式
            response.setHeader("Content-Disposition", "attachment;filename=" + downloadZipFileName);
            writeZip(new File(sourcePath),"",out);
            out.flush();
            out.close();
            System.out.println("当前目录以及子目录和文件已经压缩完成。。。。");

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if(out != null) {
                try {
                    out.close();
                    out = null;
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(fos != null) {
                try {
                    fos.close();
                    fos = null;
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    /**
     * 创建zip文件
     * @param file 文件或者目录
     * @param parentPath 父路径（默认为""）
     * @param zos ZipOutputStream
     */
    private static void writeZip(File file, String parentPath, ZipOutputStream zos) {
        if(file.exists()){
            if(file.isDirectory()){//处理文件夹
                parentPath += file.getName() + File.separator;
                File [] files=file.listFiles();
                if(files.length != 0) {
                    for(File f:files){
                        writeZip(f, parentPath, zos);
                    }
                } else {//空目录则创建当前目录
                    try {
                        zos.putNextEntry(new ZipEntry(parentPath));
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            } else {
                FileInputStream fis=null;
                try {
                    fis=new FileInputStream(file);
                    ZipEntry ze = new ZipEntry(parentPath + file.getName());
                    zos.putNextEntry(ze);
                    byte [] content=new byte[1024];
                    int len;
                    while((len=fis.read(content))!=-1){
                        zos.write(content,0,len);
                        zos.flush();
                    }

                } catch (FileNotFoundException e) {
                    System.out.println("创建ZIP文件失败");
                } catch (IOException e) {
                    System.out.println("创建ZIP文件失败");
                }finally{
                    try {
                        if(fis!=null){
                            fis.close();
                        }
                    }catch(IOException e){
                        System.out.println("创建ZIP文件失败");
                    }
                }
            }
        }
    }

    public static void main(String[] args) {
        //测试文件列表
        List srcFiles = new ArrayList();
        srcFiles.add("D:/工作目录/2020/5月/20200511-12/今日工作需求20200511.txt");
        srcFiles.add("D:/工作目录/2020/5月/20200511-12/完成情况.txt");
        ZipFiles(srcFiles, "D:\\工作目录\\2020\\5月\\20200511-12\\cszip.zip");

    }
}

testing method

package sc.sccdlg.freemarker.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import sc.sccdlg.freemarker.utils.ZipGenerateUtils;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.List;

/**
 * @Author: Rao
 * @DateTime: 2020/5/12 15:09
 * @Description: 测试验证浏览器下载打包的zip文件
 */
@Controller
@RequestMapping("/download")
public class DownloadZipController {
    
    

    @RequestMapping("/zip")
    public String zipToBrowser(HttpServletRequest request, HttpServletResponse response,
                             @RequestParam List<String> srcFiles, @RequestParam String downloadZipFileName){
    
    
        //获取到浏览器数据,调用工具类生成zip压缩的包返回
        if(!(srcFiles !=null && downloadZipFileName != null)) {
    
    
            System.out.println("参数不正确！");
            return null;
        }
        ZipGenerateUtils.ZipFiles(request,response,srcFiles,downloadZipFileName);
        return "";
    }

    @RequestMapping("/zip1")
    public String zipToBrowser2(HttpServletRequest request, HttpServletResponse response,
                               @RequestParam String src, @RequestParam String downloadZipFileName){
    
    
        //获取到浏览器数据,调用工具类生成zip压缩的包返回
        if(!(src !=null && downloadZipFileName != null)) {
    
    
            System.out.println("参数不正确！");
            return null;
        }
        ZipGenerateUtils.createZip(request,response,src,downloadZipFileName);
        return "";
    }
}

Test effect

Combining my project, the demonstration, the effect is as follows:

open the zip compression package, as follows:


Note: file content verification, because my project ultimately needs to be compressed pictures, so the document content is temporarily not verified, I hope you can use it for reference.