java图片单个下载和批量下载

前端请求

oneDownload : function(employeeImage,name){  // 单个图片下载
            window.location.href = encodeURI(App.getUrl("/api/rearService/safetyManagement/rearFaceRecognitionApplies/oneImgDownload?imgId="+ employeeImage+"&name="+name));
        },
batchDownload :function(){ 		// 图片批量下载
            // alert($("#id").val())
            window.location.href = encodeURI(App.getUrl("/api/rearService/safetyManagement/rearFaceRecognitionApplies/batchDownload?id="+$("#id").val()))
        },

后端响应

@Override
	public void oneImgDownload(String imgId, String name, HttpServletResponse response) {

		IStoreManager storeManager = SiteContext.getBean(IStoreManager.class);
		try {
			name = URLEncoder.encode(name+".jpg", "UTF-8");
			InputStream in = storeManager.download(imgId);
			response.setContentType("application/octet-stream");
			response.setHeader("Content-Disposition", "attachment;filename="+name);
			byte[] buff = new byte[1024];
			int len = 0;
			OutputStream output = response.getOutputStream();
			while ((len=in.read(buff))>0){
				output.write(buff,0,len);
			}
			output.close();
			in.close();
		} catch (IOException e) {
			e.printStackTrace();
		}

	}

	@Override
	public void batchImgDownload(String id, HttpServletResponse response) {

		// 获取子表数据
		RearFaceRecognitionManageForm manageForm = recognitionManageService.getForm(id);
		List applyList = manageForm.getApplyList();
		try{
			String downloadFilename = manageForm.getTitle()+".zip";//文件的名称
			downloadFilename = URLEncoder.encode(downloadFilename, "UTF-8");//转换中文否则可能会产生乱码
			response.setContentType("application/octet-stream");// 指明response的返回对象是文件流
			response.setHeader("Content-Disposition", "attachment;filename=" + downloadFilename);// 设置在下载框默认显示的文件名
			ZipOutputStream zos = new ZipOutputStream(response.getOutputStream());
			if(!applyList.isEmpty()) {
				IStoreManager storeManager = SiteContext.getBean(IStoreManager.class);
				int count = 1;
				for (RearFaceRecognitionApply faceRecognitionApply : applyList) {
					// 定义每个图片名称+索引防止重名覆盖
					zos.putNextEntry(new ZipEntry(faceRecognitionApply.getEmployeeName()+(count++)+".jpg"));
					// 根据图片id，到统一存储获取图片流
					InputStream download = storeManager.download(faceRecognitionApply.getEmployeeImage());
					byte[] buffer = new byte[1024];
					int len = 0;
					while ((len = download.read(buffer)) != -1) {
						zos.write(buffer, 0, len);
					}
					download.close();
				}
			}
			zos.flush();
			zos.close();
		}catch (IOException e){
			e.printStackTrace();
		}
	}