java 打包壓縮包下載文件

1. 下載壓縮包zip方法

@Override
public void downloadZip(HttpServletResponse servletResponse) {
        String nowTime = DateUtil.DateToString(new Date(), DateStyle.YYYYMMDDHHMMSS);
        // 打包文件夾路徑
        String baseTempPath = "D:/downloads/zipDownTest/";
　　　　// 定義壓縮包文件名
        String zipFileName = "申請表" +".zip";
        // 壓縮
        ZipCompress compress = new ZipCompress(zipFileName, baseTempPath);
        compress.zip();
        // 獲取壓縮文件流
        InputStream zipStream = new FileInputStream(new File(zipFileName));
        // 下載文件名中文處理
        String downZipFileName = URLEncoder.encode(zipFileName.substring(zipFileName.lastIndexOf("/") + 1), "UTF-8");
        // 下載到瀏覽器
        servletResponse.setHeader("Content-disposition", "attachment; filename*=UTF-8''" + downZipFileName);
        BufferedOutputStream bufferedOs = new BufferedOutputStream(servletResponse.getOutputStream());
        byte[] buffer = new byte[10240];
        int bytesRead = 0;
        while ((bytesRead = zipStream.read(buffer)) != -1) {
            bufferedOs.write(buffer, 0, bytesRead);
        }
        bufferedOs.flush();
        bufferedOs.close();
        zipStream.close();
        // 刪除臨時的打包文件目錄和刪除下載生成的臨時壓縮包
        FileUtil.deleteDir(baseTempPath);
        new File(zipFileName).delete();
}

2.文件壓縮工具類

package com.talebase.cloud.cas.util.zip;
import lombok.extern.log4j.Log4j2;
import java.io.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
/**
 * 文件壓縮工具類
 */
@Log4j2
public class ZipCompress {

    private String zipFileName; // 目的地Zip文件
    private String sourceFileName; // 源文件（帶壓縮的文件或文件夾）

    public ZipCompress(String zipFileName, String sourceFileName) {
        this.zipFileName = zipFileName;
        this.sourceFileName = sourceFileName;
    }


    public void zip() throws Exception {
        //File zipFile = new File(zipFileName);
        log.info("開始壓縮中...");
        long begin = System.currentTimeMillis();
        //創建zip輸出流
        File zipFile = new File(zipFileName);
        if (!zipFile.exists()) {
            zipFile.createNewFile();
        }
        ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFileName));
        //創建緩沖輸出流
        BufferedOutputStream bos = new BufferedOutputStream(out);
        File sourceFile = new File(sourceFileName);
        //調用函數
        compress(out, bos, sourceFile, sourceFile.getName());
        bos.close();
        out.close();
        long currentTimeMillis = System.currentTimeMillis();
        log.info(zipFileName + "壓縮完成(100%)....." + (currentTimeMillis - begin) + "ms");
    }

    public void zipNoDirectory() throws Exception {
        //File zipFile = new File(zipFileName);
        log.info("開始壓縮中...");
        long begin = System.currentTimeMillis();
        //創建zip輸出流
        ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFileName));
        //創建緩沖輸出流
        BufferedOutputStream bos = new BufferedOutputStream(out);
        File sourceFile = new File(sourceFileName);
        if (sourceFile.isDirectory()) {
            File[] flist = sourceFile.listFiles();
            for (int i = 0; i < flist.length; i++) {
                compress(out, bos, flist[i], flist[i].getName());
            }
        }
        //調用函數
//        compress(out,bos,sourceFile,sourceFile.getName());
        bos.close();
        out.close();
        long currentTimeMillis = System.currentTimeMillis();
        log.info(zipFileName + "壓縮完成(100%)....." + (currentTimeMillis - begin) + "ms");
    }

    public void compress(ZipOutputStream out, BufferedOutputStream bos, File sourceFile, String base) throws Exception {
        //如果路徑為目錄（文件夾）
        if (sourceFile.isDirectory()) {
            //取出文件夾中的文件（或子文件夾）
            File[] flist = sourceFile.listFiles();
            if (flist.length == 0) {//如果文件夾為空，則只需在目的地zip文件中寫入一個目錄進入點
                //System.out.println("空:******"+base+"/");
                out.putNextEntry(new ZipEntry(base + File.separator));
            } else {//如果文件夾不為空，則遞歸調用compress，文件夾中的每一個文件（或文件夾）進行壓縮
                for (int i = 0; i < flist.length; i++) {
                    compress(out, bos, flist[i], base + "/" + flist[i].getName());
                }
            }
        } else {//如果不是目錄（文件夾），即為文件，則先寫入目錄進入點，之后將文件寫入zip文件中
            out.putNextEntry(new ZipEntry(base));
            FileInputStream fos = new FileInputStream(sourceFile);
            BufferedInputStream bis = new BufferedInputStream(fos);
            int tag;
            // System.out.println(base);
            //將源文件寫入到zip文件中
            while ((tag = bis.read()) != -1) {
                bos.write(tag);
            }
            bos.flush();
            bis.close();
            fos.close();
        }
    }
}