java文件压缩输出浏览器下载 java实现文件打包压缩输出到浏览器下载

/**
     * 功能:压缩多个文件，输出压缩后的zip文件流
     *
     * @param srcfile：源文件列表
     * @param zipFileName：压缩后的文件名
     * @param response:           Http响应
     */
    public void zipFiles(List<File> srcfile, String zipFileName, HttpServletResponse response) throws IOException {
        byte[] buf = new byte[1024];
        // 获取输出流
        BufferedOutputStream bos = null;
        try {
            bos = new BufferedOutputStream(response.getOutputStream());
        } catch (IOException e) {
            e.printStackTrace();
        }
        FileInputStream in = null;
        ZipOutputStream out = null;
        try {
            response.reset(); // 重点突出
            // 不同类型的文件对应不同的MIME类型
            response.setContentType("application/x-msdownload");
            response.setCharacterEncoding("utf-8");
            response.setHeader("Content-disposition", "attachment;filename=" + zipFileName + ".zip");
 
            // ZipOutputStream类：完成文件或文件夹的压缩
            out = new ZipOutputStream(bos);
            for (int i = 0; i < srcfile.size(); i++) {
                in = new FileInputStream(srcfile.get(i));
                // 给列表中的文件单独命名
                out.putNextEntry(new ZipEntry(srcfile.get(i).getName()));
                int len = -1;
                while ((len = in.read(buf)) != -1) {
                    out.write(buf, 0, len);
                }
            }
            out.close();
            bos.close();
            log.info("压缩完成.");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (in != null) in.close();
            if (out != null) out.close();
        }
    }

zipFiles(files, zipName, response);

　　　　　String downloadName = "下载文件名称.zip";
        downloadName = BrowserCharCodeUtils.browserCharCodeFun(request, downloadName);//下载文件名乱码问题解决
        
        //将文件进行打包下载
        try {
            OutputStream out = response.getOutputStream();
            byte[] data = createZip("/fileStorage/download");//服务器存储地址
            response.reset();
            response.setHeader("Content-Disposition","attachment;fileName="+downloadName);
            response.addHeader("Content-Length", ""+data.length);
            response.setContentType("application/octet-stream;charset=UTF-8");
            IOUtils.write(data, out);
            out.flush();
            out.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

public byte[] createZip(String srcSource) throws Exception{
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        ZipOutputStream zip = new ZipOutputStream(outputStream);
        //将目标文件打包成zip导出
        File file = new File(srcSource); 
        a(zip,file,"");
        IOUtils.closeQuietly(zip);
        return outputStream.toByteArray();
    }

public void a(ZipOutputStream zip, File file, String dir) throws Exception {
            //如果当前的是文件夹，则进行进一步处理
            if (file.isDirectory()) {
                //得到文件列表信息
                File[] files = file.listFiles();
                //将文件夹添加到下一级打包目录
                zip.putNextEntry(new ZipEntry(dir + "/"));
                dir = dir.length() == 0 ? "" : dir + "/";
                //循环将文件夹中的文件打包
                for (int i = 0; i < files.length; i++) {
                    a(zip, files[i], dir + files[i].getName());         //递归处理
                }
            } else {   //当前的是文件，打包处理
                //文件输入流
               BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
               ZipEntry entry = new ZipEntry(dir);
               zip.putNextEntry(entry);
               zip.write(FileUtils.readFileToByteArray(file));
               IOUtils.closeQuietly(bis);
               zip.flush();
               zip.closeEntry();
            }
    }