1、下載文件到本地

public void download(HttpServletResponse response){String filePath ="";//文件路徑String fileName ="";//文件名稱// 讀到流中InputStream inStream = new FileInputStream(filePath);// 設置輸出的格式response.reset();response.setContentType("bin");response.addHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");IOUtils.copy(inStream, response.getOutputStream()); }

2、java后端下載

方式一： new URL(fileUrl + item.getcBhFileserver()).openStream()方法二：public Boolean addFile(String url, String id, String fileName) {RequestCallback requestCallBack = new RequestCallback() {@Overridepublic void doWithRequest(ClientHttpRequest request) throws IOException {request.getHeaders().add("accept", MediaType.APPLICATION_OCTET_STREAM_VALUE);}};ResponseExtractor<Boolean> responseExtractor = new ResponseExtractor<Boolean>() {@Overridepublic Boolean extractData(ClientHttpResponse response) throws IOException {if (response.getStatusCode() == HttpStatus.OK) {//得到文件流InputStream input = response.getBody();return true;}return false;}};return restTemplate.execute(url, HttpMethod.GET, requestCallBack, responseExtractor, id);}

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3、文件打包成zip

public void zipFilesAll() throws Exception {String zipPath = "";//zip包路徑String zipFileName = "";//zip包名稱File zipFile = new File(zipFileName .toString());// 創建 FileOutputStream 對象FileOutputStream fileOutputStream = null;// 創建 ZipOutputStreamZipOutputStream zipOutputStream = null;try {//創建文件夾zipFile = new File(zipPath );FileUtils.forceMkdir(zipFile);//創建文件zipFile = new File(zipFileName .toString());if (!zipFile.exists()) {zipFile.createNewFile();}// 實例化 FileOutputStream 對象fileOutputStream = new FileOutputStream(zipFileName.toString());// 實例化 ZipOutputStream 對象zipOutputStream = new ZipOutputStream(fileOutputStream);// 創建 ZipEntry 對象ZipEntry zipEntry = null;for (CL cl: ClList) {// 實例化 ZipEntry 對象，源文件數組中的當前文件zipEntry = new ZipEntry(tCltjjl.getcClmc() + ".zip");zipOutputStream.putNextEntry(zipEntry);IOUtils.copy(new FileInputStream(cl.getcPath(), zipOutputStream);}} catch (Exception e) {}finally{//記得刪除文件}}

　　

轉載于:https://www.cnblogs.com/jiehanshi/p/11533465.html

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