Java导出压缩包工具类

/**
 * @Title: exportZip
 * @Description:TODO(导出建压缩文件)
 * @param delAdviceinfo 为项目实体类
 * @date 2018年4月4日 下午2:36:41
 * @param response
 *
 */
public void exportZip(DelAdviceinfo delAdviceinfo, HttpServletResponse response) {
    OutputStream os = null;
    ZipOutputStream zos = null;
    try {
        os = response.getOutputStream();
        zos = new ZipOutputStream(os);
        String realpath = request.getSession().getServletContext().getRealPath("/");
        String filename = "建议正文内容.zip";
        response.setContentType("application/octet-stream");
        response.setHeader("Connection", "close");  // 表示不能用浏览器直接打开
        response.setHeader("Accept-Ranges", "bytes");  // 告诉客户端允许断点续传多线程连接下载
        response.setHeader("Content-disposition", "attachment; filename="
                + new String(URLEncoder.encode(filename, "utf-8").getBytes("UTF-8"), "ISO-8859-1"));
        // 查询数据
        String userid = getCurrentUserId();
        List<String> rolecodes = sysUserMapper.selectRoleCodesByUserID(userid);
        // 代表
        if (rolecodes.contains("db")) {
            delAdviceinfo.setCurruserid(userid);
        }
        // 代表团管理员
        else if (rolecodes.contains("dbtgly")) {
            delAdviceinfo.setArea(getCurrentUser().getAreacode());
        }
        // 承办单位
        else if (rolecodes.contains("cbdw")) {
            delAdviceinfo.setUnitid(getCurrentUser().getDelunitid());
        }
        List<DelAdviceinfo> list = delAdviceinfoMapper.selectBootPage(null, delAdviceinfo);
        for (DelAdviceinfo item : list) {
            // 查询附议代表
            if (StringUtils.isNotBlank(item.getResolutionerids())) {
                String[] resoids = item.getResolutionerids().split(",");
                List<DelDelegationinfoofSc> resos = delDelegationinfoofScMapper.selectResoList(resoids);
                item.setResos(resos);
            }
            // 保存临时文件
            String filefullname = item.getTitle() + "正文.doc";
            if (StringUtils.isNotEmpty(item.getAdviceno())) {
                filefullname = item.getAdviceno() + "_" + filefullname;
            }
            filefullname = UUID.randomUUID().toString() + "_" + filefullname;
            String filepath = realpath + "/upload/tmp/" + filefullname;
            File file = new File(filepath);
            if (!file.getParentFile().exists()) {
                file.getParentFile().mkdirs();
            }
            FileOutputStream fos = new FileOutputStream(file);
            writeAdviceContent(item, fos);

            // 加入zip流
            String entryname = file.getName();
            entryname = entryname.substring(entryname.indexOf("_") + 1);
            ZipEntry zipEntry = new ZipEntry(entryname);
            zos.putNextEntry(zipEntry);
            InputStream is = new FileInputStream(file);
            int i;
            while ((i = is.read()) != -1) {
                zos.write(i);
            }
            is.close();
            file.delete();
        }

        zos.flush();
    } catch (IOException e) {
        e.printStackTrace();
    }
    finally {
        try {
            zos.close();
            os.close();
        } catch (IOException e2) {
            e2.printStackTrace();
        }
    }

}