Java实现文件打zip包，边打包边下载

落日映苍穹つ 2022-02-18 07:58 483阅读 0赞

# 简介 #

传统文件打包方式为，服务器文件进行压缩，然后进行下载，会占用一定的服务器资源。  
以下代码实现了服务器文件打zip包，实现了边压缩打包边下载，针对的时zip包，本人因工作项目所写，亲测可用。

@RequestMapping(value = "zip/export/{}")
    public void zipExport(HttpServletRequest request, HttpServletResponse reponse){
    	//zip包的名称
    	String zipName = "package.zip";
    	//要打包的文件夹路径
    	String packagePath = "   ";
    	response.setContentType("octets/stream");
    	response.setCharacterEncoding("UTF-8");
    	String agent = request.getHeader("USER-AGENT");
    	try{
    		if(agent.contains("MSIE") || agent.contains("Trident")){
    			zipName = URLEncoder.encode(zipName, "UTF-8");
    		}else{
    			zipName = new String(zipName.getBytes("UTF-8")， “ISO-8859-1”);
    		}
    	}catch(UnsupportedEncodingException e){
    		logger.error(e.getMessage(), e);
    	}
    	 response.setHeader("Content-Disposition", "attachment;fileName=\"" + zipName + "\"");
    	 ZipOutputStream zipos = null;
    	 try {
                zipos = new ZipOutputStream(new BufferedOutputStream(response.getOutputStream()));
                zipos.setMethod(ZipOutputStream.DEFLATED);
                zipos.setLevel(0);
            } catch (IOException e) {
                logger.error(e.getMessage(), e);
            }
            DataOutputStream os = null;
            InputStream is = null;
             try {
                String[] fileNameList = new File(path).list();
                for(int i = 0; i < fileNameList.length; i++ ){
                    File file = new File(packagePath+ File.separator + fileNameList[i]);
                        zipos.putNextEntry(new ZipEntry(fileNameList[i]));
                        os = new DataOutputStream(zipos);
                        is = new FileInputStream(file);
                        //输入流转换为输出流
                        IOUtils.copy(is, os);
                        is.close();
                        zipos.closeEntry();
                }
            } catch (IOException e) {
                logger.error(e.getMessage(), e);
            }finally {
            	// 推荐使用try-with-resource
                if (is != null) {
                    is.close();
                }
                if(os != null){
    				os.flush();
    				os.close();
    			}
    			if (zipos != null) {
                    zipos.flush();
                    zipos.close();
                }
            }
    }

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