博客

代码如下：

//进入课程学习-下载课程文档   调用浏览器各自的下载方式
	@RequestMapping(value = "downloadDocFiles")
	public String downloadDocFiles(String courseId, HttpServletResponse response) throws IOException, URISyntaxException {
		List<ResourceCourseware> CoursewareList = resourceCoursewareService.findListByCourseId(courseId);
		ArrayList<ResourceFile> totalFileList = new ArrayList<>();
		//循环该课程下所有课件
		for (ResourceCourseware aCoursewareList : CoursewareList) {
			logger.debug("==Evan==CoursewareList" + aCoursewareList);
			ResourceFile resourceFile = new ResourceFile();
			resourceFile.setResourceId(aCoursewareList.getId());
			resourceFile.setType(ResourceConstants.documentMateria);
			List<ResourceFile> fileList = resourceFileService.findList(resourceFile);
			//循环所有课件下的所有文档
			for (ResourceFile aFileList : fileList) {
				logger.debug("==Evan==aFileList" + aFileList);
				totalFileList.add(aFileList);
			}
		}
		logger.debug("==Evan==totalFileNum: " + totalFileList.size() + "  totalFileList: " + totalFileList);

		response.setCharacterEncoding("utf-8");
		response.setContentType("APPLICATION/OCTET-STREAM");
		//设置content-disposition响应头控制浏览器以下载的形式打开文件，中文文件名要使用URLEncoder.encode方法进行编码，否则会出现文件名乱码
//		SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd_HHmmss");
//		response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode( "课程文档" + sdf.format(new Date()) + ".zip", "UTF-8"));
		response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode( resourceCourseService.get(courseId).getCourseName() + "_课程文档" + ".zip", "UTF-8"));
		//创建输出流
		OutputStream os = response.getOutputStream();
		byte[] buf = new byte[1024];
		try {
			//ZipOutputStream类：完成文件或文件夹的压缩
			ZipOutputStream out = new ZipOutputStream(os);
			for (ResourceFile aTotalFileList : totalFileList) {
				FileInputStream fis = new FileInputStream(aTotalFileList.getLocalUrl());
				out.putNextEntry(new ZipEntry(aTotalFileList.getName()));
				int len;
				while ((len = fis.read(buf)) > 0) {
					out.write(buf, 0, len);
				}
				out.closeEntry();
				fis.close();
			}
			out.flush();
			out.close();
			logger.debug("Evan========压缩完成!!!");
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}