JAVA以压缩包下载多个附件

public void downPrintLodopFile(String [] ape505,HttpServletRequest request, HttpServletResponse response) throws Exception{
        //获得文件路径
        String realPath = request.getSession().getServletContext().getRealPath("/upload/上传目录");
        // 不知道啥问题,在生产环境中得单独加个"/",否则在生产环境中会缺少"/"
        realPath +="/";
        for(int i=0;i<ape505.length-1;i++){
            ape505[i]=realPath+ape505[i];
        }
        //执行down
        down(realPath, ape505, request, response);
    }
    public void down(String path, String[] files, HttpServletRequest request, HttpServletResponse response) throws Exception {
        // path 压缩文件初始设置
        // 拼接zip文件,之后下载下来的压缩文件的名字
        String base_name = "附件";
        String fileZip = base_name + ".zip";
        // 之后用来生成zip文件
        String filePath = path + fileZip;

        // 创建临时压缩文件
        try {
            BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(filePath));
            ZipOutputStream zos = new ZipOutputStream(bos);
            ZipEntry ze = null;
            // 将所有需要下载的文件都写入临时zip文件
            for (int i = 0; i < files.length-1; i++) {
                BufferedInputStream bis = new BufferedInputStream(
                        new FileInputStream(files[i]));
                ze = new ZipEntry(
                        files[i].substring(files[i].lastIndexOf("\")));
                zos.putNextEntry(ze);
                int s = -1;
                while ((s = bis.read()) != -1) {
                    zos.write(s);
                }
                bis.close();
            }
            zos.flush();
            zos.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        // 以上,临时压缩文件创建完成

        // 进行浏览器下载
        // 获得浏览器代理信息
        String agent = request.getHeader("User-Agent").toUpperCase();
        // 判断浏览器代理并分别设置响应给浏览器的编码格式
        String finalFileName = null;
        if ((agent.indexOf("MSIE") > 0)
                || ((agent.indexOf("RV") != -1) && (agent.indexOf("FIREFOX") == -1)))
            finalFileName = URLEncoder.encode(fileZip, "UTF-8");
        else {
            finalFileName = new String(fileZip.getBytes("UTF-8"), "ISO8859-1");
        }
        // 告知浏览器下载文件,而不是直接打开,浏览器默认为打开
        response.setContentType("application/x-download");
        response.setHeader("Content-Disposition", "attachment;filename=""
                + finalFileName + """);// 下载文件的名称
        //输出到本地
        ServletOutputStream servletOutputStream = response.getOutputStream();
        DataOutputStream temps = new DataOutputStream(servletOutputStream);

        // 浏览器下载临时文件的路径
        DataInputStream in = new DataInputStream(new FileInputStream(filePath));
        byte[] b = new byte[2048];
        // 之后用来删除临时压缩文件
        File reportZip = new File(filePath);
        try {
            while ((in.read(b)) != -1) {
                temps.write(b);
            }
            temps.flush();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (temps != null) {
                temps.close();
            }
            if (in != null) {
                in.close();
            }
            // 删除服务器本地产生的临时压缩文件
            if (reportZip != null){
                reportZip.delete();
            }
            servletOutputStream.close();
        }
    }
原文地址:https://www.cnblogs.com/lintu-kong/p/14345765.html