二进制流保存到文件/二进制流浏览器输入文件

二进制流保存到文件/二进制流浏览器输入文件

		/**********此段代码是把二进制流byte[]生成文件 START******************/
			epolicyPdfSavePath=getEpolicyPdfSavePath();
			if (epolicyPdfSavePath != null
					&& !epolicyPdfSavePath.endsWith(File.separator)) {
				epolicyPdfSavePath = epolicyPdfSavePath + File.separator;
			}
			//文件子路径
			String filePath = ePolicyBean.getId();
			//以文件名保存
			String path = epolicyPdfSavePath + File.separator + filePath;
			File actSavedFilePath = new File(path);
			// 如果路径不存在，则创建文件夹
			if (!actSavedFilePath.exists()) {
				try {
					FileUtils.forceMkdir(actSavedFilePath);
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			String fileName = ePolicyBean.getId() +"."+ "pdf";
			String fullPath = actSavedFilePath + File.separator + fileName;
			//文件流
			byte[] pdfFile = ePolicyBean.getPdfFile();
			log.debug("pdf生成返回完整路径为:"+fullPath);
			log.debug("epolicyCCAU"+epolicyCCAU);
			getFileFromBytes(pdfFile, fullPath);
			/**********此段代码是把二进制流byte[]生成文件 END******************/
			
			
			// 下面是输出(一定要注意编码)
			// 取得 HttpServletResponse 
			/**********以文件输出流的形式把文件给输出到浏览器 START******************/
			HttpServletResponse response = ServletActionContext.getResponse();
			
			ByteArrayInputStream  in = null;
	        try {
	            response.setContentType("application/pdf");
	            //此处注释 表明是可以直接用浏览器打开。加上则表示打开一个下载文件的窗口
	           // response.setHeader("Content-Disposition", "attachment; filename=" + fileName);
	            
	            //文件输入流
	            OutputStream os = response.getOutputStream();
	            in =new ByteArrayInputStream(pdfFile);
	            int tp = 0;
	            byte[] tmpByte=new byte[4096];
	            while (true) {
	            	tp = in.read(tmpByte);
	            	if(tp <= 0){
	            		break;
	            	}
	            	
	                response.getOutputStream().write(tmpByte, 0, tp);
	            }
	            os.flush();
	        } catch (Throwable e) {
	            throw new RuntimeException("文件下载失败！", e);
	        } finally {
	            try {
	                in.close();
	            } catch (IOException e) {
	                throw new RuntimeException("关闭流失败！", e);
	            }
	        }
		

/**
     * 把文件流保存成物理文件
     * @param b
     * @param outputFile
     * @return
     */
    public static File getFileFromBytes(byte[] b, String outputFile) {
        BufferedOutputStream stream = null;
        File file = null;
        try {
            file = new File(outputFile);
            FileOutputStream fstream = new FileOutputStream(file);
            stream = new BufferedOutputStream(fstream);
            stream.write(b);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (stream != null) {
                try {
                    stream.close();
                } catch (IOException e1) {
                    e1.printStackTrace();
                }
            }
        }
        return file;
    }