java将指定文件夹按照文件目录压缩为zip压缩包

package xin.yangshuai.mybatisgeneratorweb.util;
 
import java.io.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
 
/**
 * ZipUtils
 *
 * @author shuai
 * @date 2021/7/30
 */
public class ZipUtils {
 
    public static void main(String[] args) throws Exception {
        File sourceFile = new File("D:/test/testFile");
        fileToZip(sourceFile);
    }
 
 
    /**
     * sourceFile一定要是文件夹
     * 默认会在同目录下生成zip文件
     *
     * @param sourceFilePath
     * @throws Exception
     */
    public static void fileToZip(String sourceFilePath) throws Exception {
        fileToZip(new File(sourceFilePath));
    }
 
    /**
     * sourceFile一定要是文件夹
     * 默认会在同目录下生成zip文件
     *
     * @param sourceFile
     * @throws Exception
     */
    public static void fileToZip(File sourceFile) throws Exception {
 
        if (!sourceFile.exists()) {
            throw new RuntimeException("不存在");
        }
        if (!sourceFile.isDirectory()) {
            throw new RuntimeException("不是文件夹");
        }
        //zip文件生成位置
        File zipFile = new File(sourceFile.getAbsolutePath() + ".zip");
        FileOutputStream fos = new FileOutputStream(zipFile);
        ZipOutputStream zos = new ZipOutputStream(new BufferedOutputStream(fos));
        fileToZip(zos, sourceFile, "");
        zos.close();
        fos.close();
    }
 
 
    private static void fileToZip(ZipOutputStream zos, File sourceFile, String path) throws Exception {
 
        System.out.println(sourceFile.getAbsolutePath());
 
        //如果是文件夹只创建zip实体即可，如果是文件，创建zip实体后还要读取文件内容并写入
        if (sourceFile.isDirectory()) {
            path = path + sourceFile.getName() + "/";
            ZipEntry zipEntry = new ZipEntry(path);
            zos.putNextEntry(zipEntry);
            for (File file : sourceFile.listFiles()) {
                fileToZip(zos, file, path);
            }
        } else {
            //创建ZIP实体，并添加进压缩包
            ZipEntry zipEntry = new ZipEntry(path + sourceFile.getName());
            zos.putNextEntry(zipEntry);
            byte[] bufs = new byte[1024 * 10];
            //读取待压缩的文件并写进压缩包里
            FileInputStream fis = new FileInputStream(sourceFile);
            BufferedInputStream bis = new BufferedInputStream(fis, 1024 * 10);
            int read = 0;
            while ((read = bis.read(bufs, 0, 1024 * 10)) != -1) {
                zos.write(bufs, 0, read);
            }
            bis.close();
            fis.close();
        }
    }
}

将指定的压缩包作为流发送给浏览器

                fileToZip(new File("file-management\\src\\main\\resources\\fileTemplate\\重点排放指标检测"));

                OutputStream out = res.getOutputStream();
                fileName = "file-management\\src\\main\\resources\\fileTemplate\\重点排放指标检测.zip";
                byte[] data = getByte(fileName);
                res.reset();
                res.addHeader("Content-Length", ""+data.length);
                res.setContentType("application/zip;charset=UTF-8");
                res.setHeader("Content-Disposition","attachment;filename=重点排放指标检测");
                    IOUtils.write(data, out);
                    out.flush();
                    out.close();

下面粘贴一些没有用的东西，是我自已业务的逻辑，，主要逻辑是根据传入文件不同 判断将压缩包发送给浏览器 还是将xls模板发送给浏览器文章来源地址https://www.toymoban.com/news/detail-560976.html

    public void download(HttpServletResponse res, RequestVo vo) {

        String name = vo.getName();
        try{
            InputStream inputStream=null;
            String fileName=null;
            if (name.equals("重点排放指标检测")){

                fileToZip(new File("file-management\\src\\main\\resources\\fileTemplate\\重点排放指标检测"));

                OutputStream out = res.getOutputStream();
                fileName = "file-management\\src\\main\\resources\\fileTemplate\\重点排放指标检测.zip";
                byte[] data = getByte(fileName);
                res.reset();
                res.addHeader("Content-Length", ""+data.length);
                res.setContentType("application/zip;charset=UTF-8");
                res.setHeader("Content-Disposition","attachment;filename=重点排放指标检测");
                    IOUtils.write(data, out);
                    out.flush();
                    out.close();

            }else{
                ClassPathResource classPathResource = new ClassPathResource("fileTemplate/"+name+".xls");
                 inputStream =classPathResource.getInputStream();
                 fileName = name+".xls";
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                int len ;
                byte[] buffer = new byte[1024];        //缓冲区
                while((len = inputStream.read(buffer))!=-1) {   //将接受的数据写入缓冲区数组buffer
                    baos.write(buffer,0,len);          //将缓冲区buffer写入byte数组输出流`
                }
                inputStream.close();
                baos.close();
                byte[] bytes = baos.toByteArray();
                res.setCharacterEncoding("UTF-8");
                // attachment是以附件的形式下载，inline是浏览器打开
                res.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName,"utf-8"));
                res.setContentType("text/plain;UTF-8");
                // 把二进制流放入到响应体中
                ServletOutputStream os = res.getOutputStream();

                os.write(bytes);
                os.flush();
                os.close();
            }

        }catch (Exception e){
            throw new RuntimeException("error");
        }
    }

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